CN105597913A - Method for realizing flotation of concentrates by use of ores - Google Patents
Method for realizing flotation of concentrates by use of ores Download PDFInfo
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- CN105597913A CN105597913A CN201610090883.9A CN201610090883A CN105597913A CN 105597913 A CN105597913 A CN 105597913A CN 201610090883 A CN201610090883 A CN 201610090883A CN 105597913 A CN105597913 A CN 105597913A
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- 238000005188 flotation Methods 0.000 title claims abstract description 123
- 239000012141 concentrate Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 70
- 239000000047 product Substances 0.000 claims abstract description 166
- 239000011777 magnesium Substances 0.000 claims abstract description 60
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 60
- 238000000227 grinding Methods 0.000 claims abstract description 58
- 239000013067 intermediate product Substances 0.000 claims abstract description 8
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 5
- 239000010452 phosphate Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 59
- 238000003801 milling Methods 0.000 claims description 27
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 23
- 239000011707 mineral Substances 0.000 claims description 23
- 239000000395 magnesium oxide Substances 0.000 claims description 21
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000011574 phosphorus Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 11
- 239000003112 inhibitor Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 239000002367 phosphate rock Substances 0.000 abstract description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 40
- 238000004458 analytical method Methods 0.000 description 7
- 238000010494 dissociation reaction Methods 0.000 description 7
- 230000005593 dissociations Effects 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 229910052729 chemical element Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000010459 dolomite Substances 0.000 description 3
- 229910000514 dolomite Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- -1 is numbered 2# Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for realizing flotation of concentrates by use of ores. The method comprises the following specific steps: firstly, grinding ores; classifying ground ore products, returning relatively coarse grained products obtained by classification to a grinding machine for regrinding, and performing reverse flotation operation of a flotation process on relatively fine grained products obtained by classification, wherein froth products obtained by flotation serve as final tailings; classifying products in a flotation groove; returning relatively coarse grained products which are obtained by classification and serve as intermediate products to the grinding machine for regrinding so as to form closed operation, wherein the relatively fine grained products obtained by classification serve as final concentrates. By virtue of utilizing the process to treat high-magnesium collophanite, the concentrate recovery rate is improved by 1%-3%, and the tailing P2O5 grade is reduced by 1%-2% while qualified phosphate concentrate with MgO grade less than or equal to 0.8% is obtained. The technological process is capable of obtaining stable collophanite flotation technical-economic indicators, improving the utilization rate of phosphate rock resources, reducing the energy consumption and chemical consumption of a whole flotation factory and improving the economic and social benefits of the flotation factory, and has wide industrial promotional value.
Description
Technical field
The invention belongs to chemical industry Mineral Processing Engineering field, specially refer to Dianchi Lake area of Yunnan Province spyFixed high magnesium collophane removes the processing technology of carbonate impurity by reverse flotation, be that one is passed throughHigh magnesium collophane ore dressing processing obtains qualified concentrate containing product and reduces the new technology of producing consumption simultaneously.
Background technology
For the ore dressing processing of the high magnesium collophane in Dianchi Lake area, mainly adopt single reverse flotation at presentRemove the technique of carbonate impurity, generally adopt the work flow of one roughing primary cleaning, thickSelect froth pulp directly as true tailings, selected froth pulp returns to roughly select again and selects, cleaner cellInterior product is as final concentrate. But when adopting this PROCESS FOR TREATMENT this type of high magnesium collophane to millOre deposit fineness requirement is higher, and general mog requires reach-0.074mm content to account for more than 90%,And because this type of high magnesium collophane disseminated grain size is thinner, be even milled to-0.074mm of part oreContent accounts for 95% and is still difficult to realize monomer dissociation when above, often causes carbonate impurity removal notPut in place, concentrate quality is defective. Find that after deliberation its main cause is the list of selected froth pulpBody dissociates poor, returns to roughly select that while choosing, to remove carbonate impurity effect bad again, finally causes essenceThe MgO index of mineral products is difficult to reach requirement. Add the high magnesium glue of Dian Chi periphery phosphorus in recent yearsOre deposit quality reduces gradually, and carbonate impurity content raises, and disseminated grain size is more and more thinner, to ore grindingThe requirement of fineness is more and more higher, causes ore grinding cost to raise, and sorts difficulty, and concentrate product is qualifiedRate reduces, and has directly had influence on the productivity effect of enterprise.
Taking Dianchi Lake, Yunnan Province periphery phosphate rock floating factory as example, selected raw ore P2O5Grade is by 2012Drop to 20.5% 21.3%, the 2014 year first quarter that drops to 2013 22.5% of year, protectingDemonstrate,prove in concentrate quality situation up to standard, concentrate yield and the rate of recovery reduce gradually, especially productive rateDecline obviously, tailings grade also obviously raises, and causes flotation mill's production cost to increase gradually, profitProfit reduces. Be subject to selected raw ore quality reduction, impurity content rising, ore hardness increase, ore grindingThe more and more high factor impact of fineness requirement, the single reverse floatation process single process adopting at presentThrough being difficult to meet existing production requirement, awaiting developing new processing technology and adapt to ore propertiesVariation, by improve floatation process guarantee the rate of recovery and concentrate grade, progressively reduce flotationThe energy consumption of factory, improves concentrate quality, thereby improves the economic and society benefit of flotation mill.
Summary of the invention
The object of the invention is in order to overcome current raw ore quality reduced year by year, existing single anti-floatingSelect technological process to be difficult to meet the actual conditions that production target requires, and a kind of process stabilizing is providedProperty is good, and medicament and energy resource consumption are low, and phosphor resource utilization rate is high, meets energy-saving and environmental protection, low-carbon (LC)High magnesium collophane ore dressing processing technology.
High magnesium Collophanite flotation concentrate grading and regrinding of the present invention choosing method again, be by belowTechnical scheme is achieved.
A method for mineral floating concentrate, is characterised in that its technological process is: first by mineralCarry out ore grinding, then ore milling product is carried out to classification, what classification obtained returns compared with coarse fraction productGrinding machine is regrinded, and what classification obtained carries out reverse flotation work compared with fine fraction product introduction flotation operation;Flotation froth product is as true tailings, and in flotation cell, product carries out classification; Classification obtainsCoarse fraction returns to grinding machine as intermediate products and regrinds, and forms closed-circuit operation, and it is thinner that classification obtainsGrade product is as final concentrate product, and its concrete steps are:
A. first carry out ore grinding, then ore milling product is carried out to classification, obtain being suitable for reverse flotation and doIndustry compared with fine fraction product;
What b. ore milling product classification obtained return to grinding machine compared with coarse fraction product regrinds, and produces compared with fine fractionProduct, through sizing mixing and adding inhibitor and collecting agent, carry out reverse flotation work, obtain froth pulp andProduct in groove;
C. the froth pulp of reverse flotation work is as true tailings, and in groove, product carries out classification,Arrive compared with coarse fraction product with compared with fine fraction product;
What d. grading obtained in groove return to grinding machine compared with coarse fraction product regrinds, and forms closed circuit followingRing;
E. grading obtains in groove compared with fine fraction product as final concentrate.
Described mineral are high magnesium collophane.
Described mineral are the high magnesium collophanes in specific Dianchi Lake area, open for Dianchi Lake, Yunnan Province periphery is outdoorAdopt with dolomite, molecular formula: MgCO3·CaCO3, the high magnesium collophane P of major impurity2O5Content is that 17%～23%, MgO content is 4%-9%, and the most of ore grinding of the type ore is thinReach-0.074mm of degree content accounts for 85%-95%, and reach-0.074mm of small part mog containsAmount accounts for more than 95%.
A kind of high magnesium Collophanite flotation concentrate grading and regrinding choosing method again, is characterised in that: its workProcess flow is: first high magnesium collophane carried out to ore grinding, then ore milling product carried out to classification,What classification obtained return to grinding machine compared with coarse fraction product regrinds, and what classification obtained enters compared with fine fraction productEnter flotation operation and carry out reverse flotation work; Flotation froth product is as true tailings, in flotation cellProduct carries out classification; What classification obtained return to grinding machine compared with coarse fraction as intermediate products regrinds, shapeBecome closed-circuit operation, classification obtain compared with fine fraction product as final concentrate product, it specifically walksSuddenly be:
A. first carry out ore grinding for the high magnesium collophane in specific Dianchi Lake area, then ore milling product is enteredRow classification, obtain being suitable for reverse flotation work compared with fine fraction product;
What b. ore milling product classification obtained return to grinding machine compared with coarse fraction product regrinds, and produces compared with fine fractionProduct, through sizing mixing and adding inhibitor and collecting agent, carry out reverse flotation work, obtain froth pulp andProduct in groove;
C. the froth pulp of reverse flotation work is as true tailings, and in groove, product carries out classification,Arrive compared with coarse fraction product with compared with fine fraction product;
What d. grading obtained in groove return to grinding machine compared with coarse fraction product regrinds, and forms closed circuit followingRing;
E. grading obtains in groove compared with fine fraction product as final concentrate.
Ore milling product carried out to classification obtain being suitable for reverse flotation work described in step aFine fraction product refer to high magnesium collophane after ore grinding, utilize hydrocyclone, spiral classifier,The classifying equipoments such as vibratory sieve carry out graded operation, obtain compared with in fine fraction product-0.074mmContent accounts for 70%-80%, can remove most of carbonate impurity through reverse flotation workFine fraction product.
Described in step b compared with fine fraction product through sizing mixing and adding inhibitor and collecting agent, carry outReverse flotation work, refers to stirring compared with fine fraction product that ore milling product classification obtains, adjustsMass concentration, to 25%-30%, adds a certain amount of sulfuric acid and phosphoric acid to press down as inhibitor simultaneouslyProducing phosphate, adds a certain amount of aliphatic acid medicament as collecting agent collecting carbonate, then entersEnter flotation cell and carry out flotation, carbonate is separated with the form of froth pulp.
Described in step c, product in reverse flotation work groove is carried out to classification, refer to through anti-floatingBe elected to be the product in flotation cell after industry and adopt hydrocyclone, spiral classifier, vibratory sieve decileLevel equipment carries out compared with coarse fraction and separating compared with fine fraction product.
Described in step c compared with coarse fraction product, refer to thicker that grading obtains in flotation cellIn grade product, the mineral grain diameter of 90%-95% is greater than 0.074mm.
Described in step c compared with fine fraction product, refer to thinner that grading obtains in flotation cellIn grade product, the mineral grain diameter of 90%-95% is less than 0.074mm.
Final concentrate described in step e, refers to P2O5Grade >=28.5%, MgO grade≤0.8%Can carry out for downstream the qualified phosphorus concentrate product of Chemical Manufacture.
The present invention has following outstanding beneficial effect: propose for high magnesium collophane ore dressing processingThe theory selected again of flotation concentrate grading and regrinding, by reducing selected mog, to realExisting monomer dissociation return to the means such as regrind compared with coarse fraction, improved and sorted efficiency, reduced medicineAgent and energy resource consumption, can be in the situation that raw ore quality progressively reduces, and obtains qualified concentrate containing and producesProduct, improve the concentrate rate of recovery, reduce tailings grade. This technique is particularly useful for Dianchi Lake, Yunnan Province weekThe high magnesium collophane on limit, can realize normal, the steady production of such resources processing enterprise, carriesThe high utilization rate of high magnesium collophane resource, has reduced consumption, reached raising business economic andThe object of social benefit, has industrial promotional value widely. The flotation that the present invention simultaneously adoptsConcentrate grading and regrinding selects theory to can be used as the reference of other mineral ore dressing treatment process again.
Brief description of the drawings
The former PROCESS FOR TREATMENT 1 of Fig. 1#Difficulty is selected the process chart of high magnesium collophane ore.
Fig. 2 new_type treatment 1 of the present invention#Class difficulty selects high magnesium collophane ore to see process chart.
Fig. 3 be the present invention to grading operation in reverse flotation groove after compared with coarse fraction part, profitCarry out Process mineralogy analysis figure with petrographic microscope.
Fig. 4 utilizes petrographic microscope to enter compared with fine fraction after to grading operation in reverse flotation grooveRow Process mineralogy analysis figure.
Fig. 5 is for being numbered 2#, ore type is the process chart of the low-phosphorous collophane of high magnesium.
Fig. 6 new_type treatment 2 of the present invention#The low-phosphorous collophane ore of the high magnesium of class is shown in process chart.
Fig. 7 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further, but be not limited to embodiment.
First the present invention carries out ore grinding by high magnesium collophane, then ore milling product is carried out to classification,What classification obtained return to grinding machine compared with coarse fraction product regrinds, and what classification obtained enters compared with fine fraction productEnter flotation operation and carry out reverse flotation work; Flotation froth product is as true tailings, in flotation cellProduct carries out classification; What classification obtained return to grinding machine compared with coarse fraction as intermediate products regrinds, shapeBecome closed-circuit operation, classification obtain compared with fine fraction product as final concentrate product. It is concreteStep is:
A. first carry out ore grinding for the high magnesium collophane in specific Dianchi Lake area, then ore milling product is enteredRow classification, obtain being suitable for reverse flotation work compared with fine fraction product;
What b. ore milling product classification obtained return to grinding machine compared with coarse fraction product regrinds, and produces compared with fine fractionProduct, through sizing mixing and adding inhibitor and collecting agent, carry out reverse flotation work, obtain froth pulp andProduct in groove;
C. the froth pulp of reverse flotation work is as true tailings, and in groove, product carries out classification,Arrive compared with coarse fraction product with compared with fine fraction product;
What d. grading obtained in groove return to grinding machine compared with coarse fraction product regrinds, and forms closed circuit followingRing;
E. grading obtains in groove compared with fine fraction product as final concentrate.
To be that Dianchi Lake, Yunnan Province periphery is outdoor open the high magnesium collophane in specific Dianchi Lake area described in step aAdopt with dolomite (molecular formula: MgCO3·CaCO3) be the high magnesium collophane of major impurity, P2O5Content is that 17%～23%, MgO content is 4%-9%, the most of mill of the type oreFineness reach-0.074mm in ore deposit can realize monomer dissociation when content accounts for 85%-95%, but few portionDivide need to reach-0.074mm of mog content to account for more than 95% and can realize good listBody dissociates;
Ore milling product carried out to classification obtain being suitable for reverse flotation work described in step aFine fraction product refer to high magnesium collophane after ore grinding, utilize hydrocyclone, spiral classifier,The classifying equipoments such as vibratory sieve carry out graded operation compared with in fine fraction product-0.074mm content accounts for70%-80%, can remove producing compared with fine fraction of most of carbonate impurity through reverse flotation workProduct.
Described in step b compared with fine fraction product through sizing mixing and adding inhibitor and collecting agent, carry outReverse flotation work, refers to stirring compared with fine fraction product that ore milling product classification obtains, adjustsMass concentration, to 25%-30%, adds a certain amount of sulfuric acid and phosphoric acid to press down as inhibitor simultaneouslyProducing phosphate, adds a certain amount of aliphatic acid medicament as collecting agent collecting carbonate, then entersEnter flotation cell and carry out flotation, carbonate is separated with the form of froth pulp.
Described in step c, product in reverse flotation work groove is carried out to classification, refer to through anti-floatingBe elected to be the product in flotation cell after industry and adopt hydrocyclone, spiral classifier, vibratory sieve decileLevel equipment carries out compared with coarse fraction and separating compared with fine fraction product.
Described in step c compared with coarse fraction product, refer to thicker that grading obtains in flotation cellIn grade product, the mineral grain diameter of 90%-95% is greater than 0.074mm.
Described in step c compared with fine fraction product, refer to thinner that grading obtains in flotation cellIn grade product, the mineral grain diameter of 90%-95% is less than 0.074mm.
Final concentrate described in step e, refers to P2O5Grade >=28.5%, MgO grade≤0.8%Can carry out for downstream the qualified phosphorus concentrate product of Chemical Manufacture.
The high magnesium Collophanite flotation of the one concentrate grading and regrinding the present invention relates to selects technique again, is changingWork technical field of mineral processing has proposed flotation concentrate grading and regrinding and has selected theory again, meets high magnesium glueConcentrate product quality production requirement up to standard when phosphorus ore raw ore quality is lower, solves existing technique suitableThe existence such as answering property is poor, production cost is high, the concentrate rate of recovery is low, product technology economic indicator is poorSeries of problems, alleviates the contradiction between recovery rate in ore-dressing and phosphorus concentrate grade technical indicator. ThisTechnique is particularly useful for the high magnesium collophane of Dianchi Lake, Yunnan Province periphery, realizes such resources processing enterpriseNormal, steady production, there is industrial promotional value widely.
Embodiment 1
Ore type is difficult selects high magnesium collophane, is numbered 1#, sample ore analysis of chemical elements knotReally in table 1:
Table 11#Raw ore analysis of chemical elements table
Former PROCESS FOR TREATMENT 1#Difficulty is selected high magnesium collophane ore
Fig. 1 is shown in technological process, adopts single reverse flotation flowsheet, first high magnesium collophane is enteredRow ore grinding, ore milling product enters hydroclone classification; What graded operation obtained produces compared with coarse fractionProduct return to grinding machine and regrind, and account for 90.00% compared with fine fraction product fineness for-0.074mm content; SoAfter carry out anti-floating roughly selecting, roughly select froth pulp as true tailings, in initial separatory cell, product carries out insteadFloating selected, selected froth pulp returns and roughly selects flow process as intermediate products, forms closed cycle and doesIndustry, in cleaner cell, product is final concentrate.
Result of the test is in table 2:
The former PROCESS FOR TREATMENT 1 of table 2#Ore deposit result of the test
As seen from Table 2, flotation 1#Class ore, selected raw ore P2O5Grade 20.35%, MgO%Content 6.78%, through one roughing primary cleaning, selected froth pulp returns to the technique of roughly selectingFlow process, obtains concentrate product P2O5Grade 28.55%, MgO content 1.06%, productive rate 61.56%,Mine tailing P2O5Grade 7.21%, the rate of recovery is 86.37%. Although concentrate product P2O5Grade baseOriginally reach product index, but do not reach≤0.8% requirement of MgO content.
New_type treatment 1 of the present invention#Class difficulty is selected high magnesium collophane ore
Fig. 2 is shown in technological process, adopts flotation concentrate grading and regrinding to select technological process again, first rightHigh magnesium collophane carries out ore grinding, then ore milling product is carried out to classification; Graded operation obtainsCoarse fraction product returns to grinding machine and regrinds, compared with in fine fraction product-0.074mm content accounts for 70.03%,It is carried out to reverse flotation one time, and flotation froth product is as true tailings, and in flotation cell, product entersRow classification, what graded operation obtained return to grinding machine compared with coarse fraction product regrinds, and forms closed cycleOperation, compared with fine fraction product as final concentrate product.
Raw ore first carries out ore grinding, rear ore milling product is carried out to classification, classification obtain compared with fine fractionIn product-0.074mm content accounts for 70.03%, and fine fraction product is carried out to reverse flotation one time, soAfterwards product in flotation cell is carried out to classification, graded operation taking 0.074mm as partition size boundaryObtain compared with fine fraction part as concentrate, compared with coarse fraction part return grinding machine regrind form closed circuitCycle operation flow process. Result of the test is in table 3:
Table 3 new_type treatment 1#Ore deposit result of the test
| Product | Productive rate (%) | P2O5(％) | MgO(％) | The rate of recovery (%) | Removal efficiency (%) |
| Concentrate | 61.89 | 29.01 | 0.79 | 88.44 | 92.81 |
| Mine tailing | 38.11 | 6.15 | 15.88 | 11.56 | |
| Add up to | 100.00 | 20.30 | 6.69 | 100.00 |
Find out flotation 1 from upper table#Class ore, through the operation of a reverse flotation scalping, anti-Grading operation returns after the raw ore and ore grinding with without sorting compared with coarse fraction in flotation cellEntering grinding machine compared with coarse fraction Product mix and carrying out ore grinding of graded operation, forms the floating closed cycle of millSystem, finally obtains concentrate product P2O5Grade 29.01%, MgO content 0.79%, productive rate61.89%, mine tailing P2O5Grade 6.15%, the rate of recovery reaches 88.44%, and concentrate product reachesIndex, MgO content is controlled at below 0.8%.
We can find out relatively above two tables, for 1#Class ore, adopts technique of the present inventionAfter processing, sorting index obviously improves, after Flotation phosphate concentrate process grading and regrinding process,Can better monomer dissociation, compare concentrate P with former treatment process2O5Grade improves 0.46%,Concentrate MgO content reduces by 0.27%, mine tailing P2O5Grade reduces by 1.06%, final concentrateP2O5The rate of recovery improves 2.07%.
To utilizing respectively polarisation compared with coarse fraction with compared with fine fraction after grading operation in reverse flotation grooveMicroscope carries out Process mineralogy analysis, sees Fig. 3 and Fig. 4:
Can be found out by above two figure, be collophane and white clouds compared with the most of mineral of coarse fraction partStone intergrowth, these part mineral enter in phosphorus concentrate and cause content of magnesia to increase, five oxidations twoPhosphorus grade reduces, and entirety reduces phosphorus concentrate technical indicator, is to pass through this portion theoreticallyDivide mineral to carry out at ore grinding, make it reach monomer dissociation and then reclaim phosphorus ore thing, remove carbonateClass impurity. And be monomer dissociation state compared with the most of mineral of fine fraction part, only contain small partCalcedony composition, the collophane of small part and the intergrowth of dolomite, roughly Pass Test phenomenonTechnical indicator situation.
Embodiment 2
Ore type is the low-phosphorous collophane of high magnesium, is numbered 2#, sample ore analysis of chemical elements resultIn table 4:
Table 42#Raw ore analysis of chemical elements table
Former PROCESS FOR TREATMENT 2#The low-phosphorous collophane ore of the high magnesium of class
Fig. 5 is shown in technological process, adopts single reverse flotation flowsheet, and low-phosphorous high magnesium collophane is carried outOre grinding, ore milling product enters hydroclone classification; Graded operation obtain compared with coarse fraction productReturn to grinding machine and regrind, account for 92.45% compared with fine fraction product fineness for-0.074mm content, toFine fraction product carries out anti-floating roughly selecting; Roughly select froth pulp as true tailings, in initial separatory cell, produceProduct carry out anti-floating selected, and selected froth pulp returns and roughly selects flow process as intermediate products, and formation is closedRoad cycle operation, in cleaner cell, product is final concentrate. Used 2#Class raw ore is difficult select highThe low-phosphorous collophane of magnesium, due to raw ore P2O5Content reduces, and MgO content is higher, so need to prolongLong flotation time, improves mog, increases dosing, and beneficiation cost also increases thereupon.Result of the test is in table 5:
The former PROCESS FOR TREATMENT 2 of table 5#The low phosphorus ore of high magnesium
As seen from Table 5, flotation 2#Class ore, selected raw ore P2O5Grade 18.30%, MgOContent 8.00%, through one roughing primary cleaning, selected froth pulp returns roughly selects operation workSkill, obtains concentrate product P2O5Grade 28.62%, MgO content is 1.10%, productive rate 51.73%,Mine tailing P2O5Grade 7.24%, the rate of recovery 80.90%, final concentrate product index is undesirable,MgO content do not reach≤0.8% requirement. Illustrate in the time that ore quality reduces, not only flotation becomesThis rising, and be difficult to obtain qualified concentrate product.
New_type treatment 2 of the present invention#The low-phosphorous collophane ore of the high magnesium of class
Fig. 6 is shown in technological process, adopts flotation concentrate grading and regrinding to select technological process again, first rightHigh magnesium collophane carries out ore grinding, then ore milling product is carried out to classification; Graded operation obtainsCoarse fraction product returns to grinding machine and regrinds, compared with in fine fraction product-0.074mm content accounts for 78.56%,It is carried out to reverse flotation one time, and flotation froth product is as true tailings, and in flotation cell, product entersRow classification, what graded operation obtained return to grinding machine compared with coarse fraction product regrinds, and forms closed cycleOperation, compared with fine fraction product as final concentrate product.
Raw ore first carries out ore grinding, rear ore milling product is carried out to classification, classification obtain compared with fine fractionIn product-0.074mm content accounts for 78.56%, and fine fraction product is carried out to reverse flotation one time, soAfterwards product in flotation cell is carried out to classification, graded operation taking 0.074mm as partition size boundaryObtain compared with fine fraction part as concentrate, compared with coarse fraction part return grinding machine regrind form closed circuitCycle operation flow process. Result of the test is in table 6:
Table 6 new_type treatment 2#The low phosphorus ore of high magnesium
| Product | Productive rate (%) | P2O5(％) | MgO(％) | The rate of recovery (%) | Removal efficiency (%) |
| Concentrate | 52.23 | 29.17 | 0.75 | 83.71 | 95.14 |
| Mine tailing | 47.77 | 6.20 | 16.06 | 16.29 | |
| Add up to | 100.00 | 18.20 | 8.06 | 100.00 |
Find out flotation 2 from upper table#Class ore, selected raw ore P2O5Grade 18.20%, MgOContent 8.06%, through the operation of a flotation scalping, grading operation in reverse flotation grooveCompared with coarse fraction return with raw ore without sorting and ore grinding after the producing compared with coarse fraction of graded operationProduct are mixed into grinding machine and carry out ore grinding, form the floating closed cycle system of mill, finally obtain concentrate and produceProduct P2O5Grade 29.17%, MgO content 0.75%, productive rate 52.23%, mine tailing P2O5ProductPosition 6.20%, the rate of recovery reaches 83.71%, and concentrate product touches the mark, the control of MgO contentBelow 0.8%.
Contrast can be found out based on the above results, for 2#Class ore, adopts technique of the present inventionAfter processing, sorting index obviously improves, after the classified regrinding and reconcentration technique of flotation concentrate,Can better monomer dissociation, compare concentrate P with former treatment process2O5Grade improves 0.55%,Concentrate MgO content reduces by 0.35%, mine tailing P2O5Grade reduces by 1.04%, and final concentrate returnsYield improves 2.81%.
Used 1#、2#Raw ore is that two kinds of different difficulties are selected high magnesium collophane, so in designIn the scheme of flotation flowsheet, main purpose is to remove carbonate impurity enriched phosphoric acid salt phosphorusMineral. Can find out from above-mentioned result of the test: 1. the classification of a kind of high magnesium Collophanite flotation concentrate againIt is good, right that mill selects technique to remove carbonate impurity effect than existing single reverse floatation process flow process againIn the situation that raw ore quality declines in the future, stablize phosphorus concentrate quality and have the larger potentiality of utilizing; 2. formerIn the fine fraction product of ore deposit grinding-classification operation-0.074mm content accounts for 70%-80%, than existingIt is larger that 90% grind grading fineness reduces amplitude, and grinding operation control is more prone to, flotation millEntirety energy consumption also can significantly reduce; 3. this kind high magnesium Collophanite flotation concentrate grading and regrinding selects againTechnological process is simple, for once reverse flotation work, and sulfuric acid and collector dosage reduce, entiretyFloating agent cost approximately 40%.
Embodiments of the invention, are appreciated that without departing from the principles of the present invention, canThese embodiment are carried out to multiple variation, amendment, replacement and modification, and scope of the present invention is by weighingProfit requires and coordinate limits.
Claims (10)
1. a method for mineral floating concentrate, is characterised in that, its technological process is: firstMineral are carried out to ore grinding, then ore milling product is carried out to classification, what classification obtained produces compared with coarse fractionProduct return to grinding machine and regrind, and what classification obtained carries out reverse flotation compared with fine fraction product introduction flotation operationOperation; Flotation froth product is as true tailings, and in flotation cell, product carries out classification; Classification obtainsTo return to grinding machine compared with coarse fraction as intermediate products and regrind, form closed-circuit operation, classification obtainsCompared with fine fraction product as final concentrate product, its concrete steps are:
A. first carry out ore grinding, then ore milling product is carried out to classification, obtain being suitable for reverse flotation and doIndustry compared with fine fraction product;
What b. ore milling product classification obtained return to grinding machine compared with coarse fraction product regrinds, and produces compared with fine fractionProduct, through sizing mixing and adding inhibitor and collecting agent, carry out reverse flotation work, obtain froth pulp andProduct in groove;
C. the froth pulp of reverse flotation work is as true tailings, and in groove, product carries out classification,Arrive compared with coarse fraction product with compared with fine fraction product;
What d. grading obtained in groove return to grinding machine compared with coarse fraction product regrinds, and forms closed circuit followingRing;
E. grading obtains in groove compared with fine fraction product as final concentrate.
2. the method for mineral floating concentrate according to claim 1, is characterized in that: instituteThe mineral of stating are high magnesium collophane.
3. the method for mineral floating concentrate according to claim 1, is characterized in that: instituteThe mineral of stating are the high magnesium collophanes in specific Dianchi Lake area, for Dianchi Lake, Yunnan Province periphery opencast withDolomite, molecular formula: MgCO3·CaCO3, the high magnesium collophane P of major impurity2O5ContentBe that 17%～23%, MgO content is 4%-9%, the most of mog of the type ore reachesAccount for 85%-95% to-0.074mm content, reach-0.074mm of small part mog content accounts forMore than 95%.
4. a high magnesium Collophanite flotation concentrate grading and regrinding choosing method again, is characterised in that: itsTechnological process is: first high magnesium collophane carried out to ore grinding, then ore milling product carried out to classification,What classification obtained return to grinding machine compared with coarse fraction product regrinds, and what classification obtained enters compared with fine fraction productEnter flotation operation and carry out reverse flotation work; Flotation froth product is as true tailings, in flotation cellProduct carries out classification; What classification obtained return to grinding machine compared with coarse fraction as intermediate products regrinds, shapeBecome closed-circuit operation, classification obtain compared with fine fraction product as final concentrate product, it specifically walksSuddenly be:
A. first carry out ore grinding for the high magnesium collophane in specific Dianchi Lake area, then ore milling product is enteredRow classification, obtain being suitable for reverse flotation work compared with fine fraction product;
What b. ore milling product classification obtained return to grinding machine compared with coarse fraction product regrinds, and produces compared with fine fractionProduct, through sizing mixing and adding inhibitor and collecting agent, carry out reverse flotation work, obtain froth pulp andProduct in groove;
C. the froth pulp of reverse flotation work is as true tailings, and in groove, product carries out classification,Arrive compared with coarse fraction product with compared with fine fraction product;
What d. grading obtained in groove return to grinding machine compared with coarse fraction product regrinds, and forms closed circuit followingRing;
E. grading obtains in groove compared with fine fraction product as final concentrate.
5. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: described in step a to ore milling product carry out classification obtain being suitable for reverse flotation doIndustry refer to that compared with fine fraction product high magnesium collophane utilizes hydrocyclone, spiral to divide after ore grindingThe classifying equipoments such as level machine, vibratory sieve carry out graded operation, obtain compared with in fine fraction product-0.074mm content accounts for 70%-80%, can remove most of carbonate through reverse flotation workImpurity compared with fine fraction product.
6. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: described in step b compared with fine fraction product through sizing mixing and adding inhibitor and collectingAgent, carries out reverse flotation work, refers to stirring compared with fine fraction product that ore milling product classification obtainsMix, adjust mass concentration to 25%-30%, add a certain amount of sulfuric acid and phosphoric acid conduct simultaneouslyInhibitor suppresses phosphate, adds a certain amount of aliphatic acid medicament as collecting agent collecting carbonate,Then enter flotation cell and carry out flotation, carbonate is separated with the form of froth pulp.
7. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: described in step c, product in reverse flotation work groove is carried out to classification, it is right to refer toProduct after reverse flotation work in flotation cell adopts hydrocyclone, spiral classifier, shakesThe classifying equipoments such as moving sieve carry out compared with coarse fraction and separating compared with fine fraction product.
8. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: described in step c compared with coarse fraction product, refer in flotation cell that grading obtainsTo the mineral grain diameter compared with 90%-95% in coarse fraction product be greater than 0.074mm.
9. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: described in step c compared with fine fraction product, refer in flotation cell that grading obtainsTo the mineral grain diameter compared with 90%-95% in fine fraction product be less than 0.074mm.
10. high magnesium Collophanite flotation concentrate grading and regrinding choosing method more according to claim 4,It is characterized in that: the final concentrate described in step e, refers to P2O5Grade >=28.5%, MgOGrade≤0.8% can carry out for downstream the qualified phosphorus concentrate product of Chemical Manufacture.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261367A (en) * | 2018-08-01 | 2019-01-25 | 昆明理工大学 | One kind being used for phosphate reverse flotation combination medicament and its application method |
| CN112517232A (en) * | 2020-11-18 | 2021-03-19 | 云南磷化集团有限公司 | Flotation method for low-grade collophanite with compact block structure |
| CN113600344A (en) * | 2021-07-21 | 2021-11-05 | 宜都兴发化工有限公司 | Ore dressing process for removing sesquioxide from collophanite by intermediate grading and retreatment |
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| CN102744151A (en) * | 2012-07-06 | 2012-10-24 | 中蓝连海设计研究院 | Branch flotation technology for silicon calcium collophanite |
| CN104549762A (en) * | 2014-11-14 | 2015-04-29 | 云南磷化集团有限公司 | Grinding-flotation closed circuit technology for refractory high-magnesium collophanite |
| CN104707734A (en) * | 2014-12-17 | 2015-06-17 | 云南磷化集团有限公司 | Process for reducing collophanite flotation tailing grade |
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| US3732090A (en) * | 1971-02-17 | 1973-05-08 | Agrico Chem Co | Processing of phosphate rock |
| CN102744151A (en) * | 2012-07-06 | 2012-10-24 | 中蓝连海设计研究院 | Branch flotation technology for silicon calcium collophanite |
| CN104549762A (en) * | 2014-11-14 | 2015-04-29 | 云南磷化集团有限公司 | Grinding-flotation closed circuit technology for refractory high-magnesium collophanite |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109261367A (en) * | 2018-08-01 | 2019-01-25 | 昆明理工大学 | One kind being used for phosphate reverse flotation combination medicament and its application method |
| CN112517232A (en) * | 2020-11-18 | 2021-03-19 | 云南磷化集团有限公司 | Flotation method for low-grade collophanite with compact block structure |
| CN112517232B (en) * | 2020-11-18 | 2022-07-29 | 云南磷化集团有限公司 | Flotation method for low-grade collophanite with compact block structure |
| CN113600344A (en) * | 2021-07-21 | 2021-11-05 | 宜都兴发化工有限公司 | Ore dressing process for removing sesquioxide from collophanite by intermediate grading and retreatment |
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