CN113926593A - Lead-sulfur mixed floating method - Google Patents
Lead-sulfur mixed floating method Download PDFInfo
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- CN113926593A CN113926593A CN202111164600.8A CN202111164600A CN113926593A CN 113926593 A CN113926593 A CN 113926593A CN 202111164600 A CN202111164600 A CN 202111164600A CN 113926593 A CN113926593 A CN 113926593A
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- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 83
- 239000011593 sulfur Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000007667 floating Methods 0.000 title claims abstract description 34
- 239000002002 slurry Substances 0.000 claims abstract description 73
- 238000005188 flotation Methods 0.000 claims abstract description 54
- 239000012141 concentrate Substances 0.000 claims abstract description 42
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003112 inhibitor Substances 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004088 foaming agent Substances 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims description 30
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 19
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 17
- 229960001763 zinc sulfate Drugs 0.000 claims description 17
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 17
- 238000000227 grinding Methods 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- QTANTQQOYSUMLC-UHFFFAOYSA-O Ethidium cation Chemical compound C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CC)=C1C1=CC=CC=C1 QTANTQQOYSUMLC-UHFFFAOYSA-O 0.000 claims description 9
- GGLZPLKKBSSKCX-YFKPBYRVSA-N L-ethionine Chemical compound CCSCC[C@H](N)C(O)=O GGLZPLKKBSSKCX-YFKPBYRVSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 2
- 239000012991 xanthate Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 1
- 239000011701 zinc Substances 0.000 abstract description 28
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 27
- 229910052725 zinc Inorganic materials 0.000 abstract description 27
- 239000006260 foam Substances 0.000 abstract description 4
- 239000011133 lead Substances 0.000 description 48
- 230000000694 effects Effects 0.000 description 22
- 238000012360 testing method Methods 0.000 description 17
- 238000003756 stirring Methods 0.000 description 14
- 238000000926 separation method Methods 0.000 description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- APYGBEXYIRZQJR-UHFFFAOYSA-N [N].C(C)[S] Chemical compound [N].C(C)[S] APYGBEXYIRZQJR-UHFFFAOYSA-N 0.000 description 5
- 229910002651 NO3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000005083 Zinc sulfide Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 229910001656 zinc mineral Inorganic materials 0.000 description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052949 galena Inorganic materials 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 229910001739 silver mineral Inorganic materials 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
Images
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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- 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
- B03D1/028—Control and monitoring of flotation processes; computer models therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The application relates to the technical field of flotation, and provides a lead and sulfur mixed flotation method, which comprises the following steps: preparing lead-zinc ore into first slurry; adding an inhibitor into the first slurry and carrying out first mixing treatment to obtain second slurry; adding a catching agent into the second slurry and carrying out second mixing treatment to obtain third slurry; and adding a foaming agent into the third slurry and carrying out third mixing treatment to obtain the lead-sulfur floating mixture and the tailings. The lead-sulfur mixed floating method provided by the application is characterized in that an inhibitor is added into the first slurry to inhibit the zinc concentrate in the lead-zinc ore from floating out, so that the purpose of preferential mixed floating of the lead-sulfur bulk concentrate is achieved, the second slurry is obtained, a capturing agent is added into the second slurry, the hydrophobicity of the surface of the lead-sulfur bulk concentrate can be changed, the third slurry is obtained, a foaming agent is added into the third slurry, stable foam is generated to store the lead-sulfur bulk concentrate, and then the task of mixed floating of the lead-sulfur bulk concentrate is completed.
Description
Technical Field
The application belongs to the technical field of flotation, and particularly relates to a lead and sulfur mixed flotation method.
Background
The lead-zinc ore is a mineral product rich in metal elements of lead and zinc, and the lead and the zinc have wide application and are used in the fields of electrical industry, mechanical industry, military industry, metallurgical industry, chemical industry, light industry, pharmaceutical industry and the like. In addition, lead metal is also used in many applications in nuclear and petroleum industries. Lead is one of the older metals that humans extracted from lead-zinc ores.
At present, flotation and mineral separation are one of the most important processes in mineral separation application, and the application is very wide. The lead-zinc ore deposit often has sulphide ore, sulphide-oxide mixed ore and oxide ore at the same time, along with the continuous increase of the demand of our country for nonferrous metals, the high-quality lead-zinc ore which can be exploited is less and less, only lean ore, oxide ore and the mine with complex structure can be exploited and recovered step by step, the traditional beneficiation method is difficult to treat and recover the raw ore, the resource waste is caused, and the optimized process is urgently needed to treat the ore.
In addition, the mineral separation process of lead-zinc ore, especially high-sulfur lead-zinc ore, usually adopts a preferential flotation process for inhibiting zinc and lead floating, in order to achieve better separation effect, a plurality of zinc ore inhibitors are added during lead flotation, and a zinc mineral activating agent is added into the generated tailings in the subsequent zinc floating operation. The addition of a large amount of regulators further increases the consumption of the collecting agent, causes the flotation phenomenon of 'heavy pressure redraw', causes low lead and zinc recovery rate, large consumption of beneficiation reagents, poor economic benefit and increased environmental pollution, and particularly solves the technical problems that the prior flotation process cannot simultaneously realize the highest lead, zinc and silver recovery rate and the best lead and zinc concentrate main grade for treating some high-grade lead and zinc sulphide ores and some lead and zinc sulphide ores and polymetallic sulphide ores containing independent silver minerals; the process also has the defects of high tail leakage, poor concentrate quality and high cost of lead, zinc, silver and the like. In view of the above, it is of great significance to find a new flotation technology for high-sulfur lead-zinc ore with advanced technology, high efficiency and low cost.
Disclosure of Invention
The application aims to provide a lead-sulfur mixed flotation method, and aims to solve the problem that lead-sulfur concentrate in the prior art is poor in flotation effect.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
the application provides a lead and sulfur mixed floating method, which comprises the following steps:
preparing lead-zinc ore into first slurry;
adding an inhibitor into the first slurry and carrying out first mixing treatment to obtain second slurry;
adding a catching agent into the second slurry and carrying out second mixing treatment to obtain third slurry;
and adding a foaming agent into the third slurry and carrying out third mixing treatment to obtain the lead-sulfur floating mixture and the tailings.
The lead-sulfur mixed floating method provided by the application is characterized in that an inhibitor is added into the first slurry to inhibit the zinc concentrate in the lead-zinc ore from floating out, so that the purpose of preferential mixed floating of the lead-sulfur bulk concentrate is achieved, the second slurry is obtained, a capturing agent is added into the second slurry, the hydrophobicity of the surface of the lead-sulfur bulk concentrate can be changed, the third slurry is obtained, a foaming agent is added into the third slurry, stable foam is generated to store the lead-sulfur bulk concentrate, and then the task of mixed floating of the lead-sulfur bulk concentrate is completed.
Drawings
FIG. 1 is a flow chart of lead-sulfur floating in the embodiment of the present invention;
FIG. 2 is a diagram showing the lead-sulfur flotation effect of different types of capture agents provided in the example of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one item(s) of a, b, or c," or "at least one item(s) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of regulations of this application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The embodiment of the application provides a lead and sulfur mixed floating method, which comprises the following steps:
step S1: preparing lead-zinc ore into first slurry;
step S2: adding an inhibitor into the first slurry and carrying out first mixing treatment to obtain second slurry;
step S3: adding a catching agent into the second slurry and carrying out second mixing treatment to obtain third slurry;
step S4: and adding a foaming agent into the third slurry and carrying out third mixing treatment to obtain the lead-sulfur floating mixture and the tailings.
According to the lead-sulfur mixed flotation method provided by the embodiment of the application, the inhibitor is added into the first slurry, so that the zinc concentrate in the lead-zinc ore is inhibited from floating, the lead-sulfur mixed concentrate is preferably subjected to mixed flotation subsequently, so that the second slurry is obtained, the catcher is added into the second slurry, the hydrophobicity of the surface of the lead-sulfur mixed concentrate can be changed, so that the third slurry is obtained, the foaming agent is added into the third slurry, stable foam is generated to store the lead-sulfur mixed concentrate, and the purpose of mixed flotation of the lead-sulfur mixed concentrate is achieved.
In some embodiments, before step S1, a step of pre-treating the lead-zinc ore is further included, where the pre-treating includes crushing and grinding the lead-zinc ore to make the weight ratio of the lead-zinc ore particle size smaller than 0.074mm larger than 85%, in order to increase the contact area between the raw ore and the flotation reagent and increase the recovery rate of the raw ore, researchers need to crush and grind the raw ore, and in addition, the relation between the grinding time and the raw ore particle size is studied, for example, the grinding mill used in the experiment is a ball mill, the equipment model: QC36-4TA, Specification: 240 × 90, parameters: the ball weight is 7.5KG, and when the ore grinding time is more than 7min, the weight ratio of the lead-zinc ore particle size less than 0.074mm can be more than 85%.
Further, the lead-zinc ore ground in the examples of the present application and water were mixed at a mass ratio of 1:4 to 1: 1.
In step S2, the inhibitor includes at least one of sodium carbonate and zinc sulfate, and the inhibitor can inhibit the zinc concentrate in the lead-zinc ore so as to perform the subsequent flotation on the lead-sulfur bulk concentrate, wherein the mixed inhibitor of sodium carbonate and zinc sulfate has a better effect of inhibiting the zinc concentrate in the lead-zinc ore.
In order to further improve the inhibition on the lead-sulfur bulk concentrate, in the embodiment, the inhibitor is a mixture of sodium carbonate and zinc sulfate, and when the sodium carbonate and the zinc sulfate inhibitor are respectively added into the first slurry according to the concentrations of 400-1000 g/t, the zinc sulfate dosage of 600g/t achieves a satisfactory effect only from the inhibition effect of the zinc concentrate in the lead-zinc ore, the effect is not greatly improved continuously, and the inhibitor dosages of 1000g/t of sodium carbonate and 600g/t of zinc sulfate have a relatively good inhibition effect on the zinc concentrate in the lead-zinc ore from the comprehensive consideration of the effect and the cost.
In an embodiment, the first mixing treatment further comprises a first stirring treatment, wherein the first stirring time is 1-3 min, so that the inhibitor and the first slurry are uniformly mixed.
In step S3, the capture agent includes at least one of the butyl xanthate, ethyl xanthate and ethyl sulfur nitrogen, wherein the capture effect of the mixture of the butyl xanthate and the ethyl sulfur nitrogen is the best, and the recovery rate of lead concentrate reaches more than 92.71%.
In the embodiment, in order to further improve the recovery rate of lead, the influence of the compounding ratio of the butyl xanthate and the ethionine is studied, and research results show that the trapping agent comprises a mixture of the butyl xanthate and the ethionine, the weight ratio of the butyl xanthate to the ethionine is 1: 3-3: 1, and the research shows that the weight ratio of the butyl xanthate to the ethionine can be 1:1, 1:2, 1:3, 2:1 and 3:1, wherein when the ratio of the butyl xanthate to the ethionine is 1:1, the flotation effect of lead is better than that of other compounding ratios.
In an embodiment, the second mixing treatment comprises a second stirring treatment, wherein the second stirring time is 1-2 min, so that the second slurry and the capture agent are uniformly mixed.
In the embodiment, on the basis of the technology of the technical scheme, in order to further improve the recovery rate of the lead-sulfur bulk concentrate, the using amount of the catching agent is 80-100 g/t, wherein the catching effect of the catching agent of 100g/t is optimal, in addition, when the using amount of the catching agent reaches 100g/t, the recovery rate of the lead-sulfur bulk concentrate is not obviously changed when the using amount of the catching agent is continuously increased, the floating amount of zinc concentrate in the lead-zinc ore is slightly increased, which indicates that the recoverable lead-sulfur bulk concentrate basically floats completely, and the increase of the using amount of the collecting rate is not beneficial.
In some embodiments, the method further comprises at least once treating the first rougher lead concentrate according to the steps of making the first slurry to the third mixed treatment, and performing rougher flotation on the first rougher lead-sulfur bulk concentrate for a plurality of times can ensure lead recovery.
In the embodiment, when the roughing times are two, the first roughing time is 6min, and the second roughing time is 4min, so that the floating amount of the lead-sulfur bulk concentrate can be increased.
In step S4, the foaming agent includes # 2 oil, which provides a stable foam to store the lead-sulfur bulk concentrate and float it out.
In some embodiments, the foaming agent is added into the third slurry according to the concentration of 40-60 g/t, and the mixed flotation task of the lead-sulfur bulk concentrate can be completed.
In an embodiment, in step S4, the third mixing process further includes a third stirring, wherein the third stirring time is 0.5-1 min.
In the examples, the lead concentrate recovery was greater than 88% and the sulphur concentrate recovery was greater than 78%.
The following description will be given with reference to specific examples.
Example 1
The method comprises the steps of pretreating raw ores, wherein the pretreatment comprises the steps of crushing and grinding the lead-zinc ores, the weight ratio of the grain size of the lead-zinc ores smaller than 0.074mm is larger than 85%, researchers need to crush and grind the raw ores in order to improve the contact area of the lead-zinc ores and a flotation reagent and improve the recovery rate of the raw ores, in addition, the relation between the grinding time and the grain size of the raw ores is researched, and when grinding does not start, a grinding machine adopted in an experiment is a ball mill, and the equipment model is as follows: QC36-4TA, Specification: 240 × 90, parameters: the ball weight is 7.5KG, and when the ore grinding time is more than 7min, the weight ratio of the lead-zinc ore particle size less than 0.074mm can be more than 85%.
Fig. 1 provides a flow chart of a lead-sulfur mixed floating method, which comprises the following steps: a first rough selection step: selecting 800g of raw ore, preparing the 800g of raw ore into ore pulp to obtain first slurry, and adding Na into the first slurry according to the concentration of 1000g/t2CO3And adding ZnSO at a concentration of 800g/t4Stirring for the first time for 3min to obtain a second slurry, adding the butyl xanthate and the ethidium and nitrogen oxide (the weight ratio is 1:1) into the second slurry according to the concentration of 80g/t, stirring for the second time for 2min to obtain a third slurry, adding the No. 2 oil into the third slurry according to the concentration of 50g/t, stirring for the third time, and stirring for 1min to obtain a fourth slurry and a first rough separation lead-sulfur mixed concentrate (K-Pb 1).
A second rough selection step: to the fourth slurry, Na was added at a concentration of 200g/t2CO3And adding ZnSO at a concentration of 200g/t4And stirring for the fourth time for 3min to obtain a fifth slurry, adding the butyl xanthate and the ethidium and nitrogen oxide (the weight ratio is 1:1) at the concentration of 30g/t into the fifth slurry, stirring for the fifth time for 2min to obtain a sixth slurry, adding the No. 2 oil at the concentration of 20g/t into the sixth slurry, stirring for the sixth time, and stirring for 1min to obtain a seventh slurry (lead dressing tailings X) and secondary rough lead and sulfur mixed concentrate (K-Pb 2).
Examples 2 to 5
Examples 2 to 5 were compared with example 1 using the same roughing method, but with the difference that the weight ratio of the butanexanthate to the ethidium nitrate was different during the addition of the butanexanthate and ethidium nitrate to the second slurry or the fifth slurry, as detailed in table 1.
TABLE 1 proportioning test results of lead-sulfur mixed floating collector
In view of the difference between the selectivity and the collecting capacity of the butyl xanthate and the ethidium nitrate, a matching test of two collecting agents is carried out, and an optimal matching is tried to be found. In the lead-sulfur mixed flotation collector type test, the floating amount distribution of two times of rough flotation is unreasonable, so that the using amount of the collecting agent for the first time of rough flotation is increased from 80g/t to 100g/t in the test, and meanwhile, the using amount of the foaming agent is reduced according to experience. According to the test results, the xanthate: ethionine-1: 1, the comprehensive effect is best, which is consistent with the production, so that the butyl xanthate is selected: ethionine-1: 1 is used as a lead and sulfur mixed floating collector.
Comparative examples 1 to 3
Comparative examples 1 to 3 were compared with example 1, and the same roughing method was used, except that the kind of the scavenger added to the second slurry and the fifth slurry were different, and the details thereof are shown in table 2.
TABLE 2 test results of lead and sulfur mixed floating collector species
In the lead-sulfur mixed floating collector test, a zinc inhibitor is fixed, the collector uses common butyl xanthate, ethyl sulfur nitrogen and a mixture of the butyl xanthate and the ethyl sulfur nitrogen (the field ratio of the butyl xanthate to the ethyl sulfur nitrogen is 1:1), the recovery rates of lead and sulfur in two times of rough separation are particularly concerned when the flotation effect is evaluated, and the better the effect of the collector is if the recovery rates of the lead and the sulfur are higher and the recovery rate of zinc is lower. According to test results, the Pb and S recovery rate obtained by the mixed chemical is the highest, the Zn recovery rate is lower, and the flotation effect is the best, so that the mixed collecting agent for lead-sulfur mixed flotation is the best.
Examples 6 to 9
Examples 6 to 9 were compared with example 1 using the same roughing method except that the amounts of zinc sulfate and sodium carbonate added to the first and fourth slurries were different, wherein the details are shown in table 3.
TABLE 3 test results of the kind of lead-sulfur mixed zinc floating inhibitor
The zinc inhibitor adopts conventional zinc sulfate and a combination inhibitor thereof, and results show that the inhibiting effect is not greatly different when the single zinc sulfate is used as the inhibitor and the dosage of 600g/t and 1000g/t is not greatly different; when the combined inhibitor is selected, the recovery rate of zinc is lower, and the recovery rates of lead and sulfur are higher than that of a zinc sulfate single inhibitor, so that the combined effect of the combined inhibitor is better than that of the single inhibitor. From the data, the combination of sodium sulfite and zinc sulfate is the best, and the combination of sodium carbonate and zinc sulfate is selected as the zinc mineral inhibitor (lead recovery rate is out of the previous test and may be an assay error) from the comprehensive consideration of effect, cost and medicament system simplification as much as possible.
Examples 10 to 13
Examples 10 to 13 compared with example 1, the same roughing method was used, except that the amounts of zinc sulfate and sodium carbonate added to the first slurry and the fourth slurry were different, wherein, see table 4 for details.
TABLE 4 test results of dosage ratio of combined inhibitor for lead-sulfur mixed floating zinc
The inhibition effect of the zinc concentrate in the lead-zinc ore is only seen, the dosage of the zinc sulfate reaches a satisfactory effect when being 600g/t, the effect is not increased greatly, and the dosage of the inhibitor for roughing is 1000g/t and the dosage of the zinc sulfate is 600g/t when comprehensively considering the effect and the cost.
Example 14 to example 17
Examples 14 to 17 compared with example 1, the same roughing method was used, but the amount of inhibitor added to the first slurry or the fourth slurry was different, wherein the details are shown in table 5.
TABLE 5 test results of dosage ratio of combined inhibitor for lead-sulfur mixed floating zinc
Wherein, before the test of the type and the amount of the collecting agent is not determined, the amount of the coarse foaming agent is 50g/t, although the amount of the foaming agent is large (which is equivalent to 60g/t after the test), the yield of the first rough separation is insufficient, lead and sulfur float upwards in a large amount in the second rough separation, after the type and the amount of the collecting agent are determined, the amount of the foaming agent is adjusted downwards (40 g/t is the total amount of the coarse primary and the coarse secondary), the yield ratio of the coarse primary and the coarse secondary is 3:2, particularly, most of lead floats upwards in the first rough separation, the total yield of the coarse primary and the coarse secondary reaches about 56 percent, the total recovery rate of lead reaches about 92 percent, and the recovery rate of sulfur reaches about 86 percent, according to the production experience, the amount of the foaming agent is moved forwards, the amount of the coarse foaming agent is 50g/t, the collecting agent is added in the coarse secondary, the foaming agent is not added, the secondary rough separation is attempted to be changed into a rough separation, and the result shows that the lead and the sulfur further float upwards in the first rough separation, the yield ratio of the primary coarse flotation and the secondary coarse flotation is changed into 3:1, but the primary coarse flotation and the secondary coarse flotation are still large, and the secondary coarse flotation is considered to be more appropriate than the primary coarse flotation due to the high grade of the sulfur raw ore and the large lead-sulfur mixed flotation yield.
Examples 18 to 20
Examples 14 to 17 compared with example 1, the same roughing method was used, except that the amount of foaming agent added to the third slurry or the sixth slurry was different, wherein the details are shown in table 6.
TABLE 6 foaming agent dosage test
The dosage of a coarse foaming agent is 50g/t, although the dosage of a foaming agent is larger (which is equivalent to 60g/t after measurement), the yield of the first roughing is insufficient, lead and sulfur float up greatly in the second roughing, after the type and dosage of a collecting agent are determined, the dosage of the foaming agent is adjusted downwards (40 g/t is the total dosage of the coarse primary and the coarse secondary according to 3: 1), the yield ratio of the coarse primary and the coarse secondary is 3:1, particularly, most of lead floats upwards in the first roughing, the total yield of the coarse primary and the coarse secondary reaches about 56%, the total lead recovery rate reaches about 92%, the sulfur recovery rate reaches about 86%, further, the dosage of the foaming agent is moved forwards, the dosage of the coarse foaming agent is 50g/t, the collecting agent is added in the coarse secondary, no foaming agent is added, the secondary roughing is attempted to be changed into a coarse primary scavenging, and the result shows that the yield ratio of the coarse primary and the coarse secondary floats upwards to be 3:1, however, the coarse flotation and the secondary flotation are still large, and the yield of lead and sulfur mixed flotation is high due to high grade of sulfur raw ore, so that the secondary coarse flotation is more appropriate than the primary coarse flotation.
Examples 21 to 23
Examples 21 to 23 compared with example 1, the same rougher flotation process was used, but the amount of collector (H represents a mixture of butyl xanthate and ethidium nitrate) added to the second or fifth slurry was varied, see table 7 for details.
TABLE 7 test results of the amount of the collector used in the lead-sulfur mixture flotation
Wherein, a small amount of lead bubbles still appear in the lead rough first flotation for 5 minutes, and when the lead and sulfur are floated in a mixed mode, because the sulfur grade is high, the floating amount is large, and a small amount of lead floats slowly, the flotation time is adjusted to rough first 6 minutes and rough second 4 minutes. When the dosage of the roughing collector reaches 100g/t, the recovery rate of lead and sulfur is not obviously changed when the dosage is continuously increased, and the zinc slightly rises, which shows that the recoverable lead and sulfur basically floats up completely, and the increase of the dosage of the collecting rate is not beneficial. And determining the rough separation collecting amount to be 100 g/t.
Through a series of condition tests, lead and sulfur mixed flotation adopts a mixed collecting agent of galena and pyrite (butyl xanthate: ethidium and sulfur nitrogen ═ 1:1), sodium carbonate and zinc sulfate as a zinc blende combined inhibitor, and under the condition of proper medicament dosage, through secondary roughing, the lead operation recovery rate reaches about 93%, the sulfur recovery rate is 86%, and the zinc recovery rate is about 25%. Because the floating yield reaches about 57%, secondary roughing is more appropriate, and the lead recovery rate is difficult to ensure by primary roughing.
The present invention is not intended to be limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and spirit of the present invention.
Claims (10)
1. The lead-sulfur mixed floating method is characterized by comprising the following steps:
preparing lead-zinc ore into first slurry;
adding an inhibitor into the first slurry and carrying out first mixing treatment to obtain a second slurry;
adding a catching agent into the second slurry and carrying out second mixing treatment to obtain a third slurry;
and adding a foaming agent into the third slurry and carrying out third mixing treatment to obtain the lead-sulfur floating mixture and the tailings.
2. The lead-sulfur mixed flotation method according to claim 1, further comprising at least one cycle of the first rougher lead concentrate from the step of making the first slurry to the step of the third mixed treatment and/or the third mixed treatment
The trapping agent comprises at least one of butyl xanthate, ethidium xanthate and ethidium azote.
3. The lead-sulfur mixed flotation method according to claim 2, wherein the capture agent comprises a mixture of a butyl xanthate and ethionine, and the weight ratio of the butyl xanthate to the ethionine is 1: 3-3: 1.
4. The lead-sulfur mixed flotation method according to any one of claims 1 to 3, wherein the addition amount of the scavenger is 80 to 100 g/t.
5. The lead-sulfur flotation method according to claim 1, wherein the inhibitor comprises at least one of sodium carbonate and zinc sulfate.
6. The lead-sulfur flotation method according to any one of claims 1 to 3 and 5, wherein the inhibitor is added to the first slurry at a concentration of 400 to 1000 g/t.
7. The lead-sulfur flotation method according to claim 1, wherein the foaming agent comprises # 2 oil.
8. The lead-sulfur flotation method according to claim 1 or 7, wherein the foaming agent is added to the third slurry at a concentration of 40 to 60 g/t.
9. The lead-sulfur mixed flotation method as claimed in claim 1, further comprising the step of pretreating the lead-zinc ore before the step of preparing the lead-zinc ore into slurry, wherein the pretreatment comprises crushing and grinding the lead-zinc ore so that the weight ratio of the particle size of the lead-zinc ore smaller than 0.074mm is larger than 85%.
10. The lead-sulfur mixed flotation method as claimed in any one of claims 1 to 3, 5 and 7 to 9, characterized in that the recovery rate of lead concentrate is more than 88% and the recovery rate of sulfur concentrate is more than 78%.
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