CN100571879C - A kind of dressing process for desiliconizing of mixed type bauxite - Google Patents
A kind of dressing process for desiliconizing of mixed type bauxite Download PDFInfo
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- CN100571879C CN100571879C CNB200710179655XA CN200710179655A CN100571879C CN 100571879 C CN100571879 C CN 100571879C CN B200710179655X A CNB200710179655X A CN B200710179655XA CN 200710179655 A CN200710179655 A CN 200710179655A CN 100571879 C CN100571879 C CN 100571879C
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 40
- 239000012141 concentrate Substances 0.000 claims abstract description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 23
- 239000011707 mineral Substances 0.000 claims abstract description 23
- 238000005188 flotation Methods 0.000 claims abstract description 22
- 238000000227 grinding Methods 0.000 claims abstract description 19
- 238000012216 screening Methods 0.000 claims abstract description 17
- 230000015556 catabolic process Effects 0.000 claims abstract description 16
- 238000006731 degradation reaction Methods 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000013467 fragmentation Methods 0.000 claims abstract description 5
- 238000006062 fragmentation reaction Methods 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 8
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 7
- 150000007513 acids Chemical class 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 6
- -1 hydrocarbyl sulfonate Chemical compound 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004537 pulping Methods 0.000 claims description 3
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 3
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 3
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 229910001679 gibbsite Inorganic materials 0.000 abstract description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000000192 social effect Effects 0.000 abstract description 2
- 229910001593 boehmite Inorganic materials 0.000 description 27
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 27
- 229910001648 diaspore Inorganic materials 0.000 description 19
- 239000000126 substance Substances 0.000 description 16
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 14
- 239000005995 Aluminium silicate Substances 0.000 description 12
- 235000012211 aluminium silicate Nutrition 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 125000001931 aliphatic group Chemical group 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 5
- 239000006004 Quartz sand Substances 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 244000070406 Malus silvestris Species 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 238000004131 Bayer process Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 235000021321 essential mineral Nutrition 0.000 description 2
- 229910052900 illite Inorganic materials 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001569 aluminium mineral Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The present invention relates to a kind of dressing process for desiliconizing of mixed type bauxite, particularly contain the dressing process for desiliconizing of gibbsite mixed type bauxite.It is characterized in that mixed type bauxite is carried out fragmentation, add water slurrying and make the ore size degradation, isolate fine fraction and coarse fraction mineral in the product by screening or grading technology again, with the fine grinding of isolated coarse fraction mineral, after the fine fraction mineral that ore grinding product and screening or classification are obtained mix then, carry out flotation.After the invention process, the low-grade gibbsite mixed type mineral dressing and silicon removal of bauxite that contains in having realized under the condition that guarantees concentrate A/S ratio, has the higher rate of recovery; Technological process is simple, stable, strong operability; Enlarged the resource provision of bauxite,, the sustainable development of aluminum oxide industry has been had important economic implications and social effect for such bauxite resource of economic utilization provides technical support.
Description
Technical field
The present invention relates to the dressing process for desiliconizing of a kind of dressing process for desiliconizing of mixed type bauxite, particularly gibbsite and boehmite, diaspore mixed type bauxite.
Background technology
Bauxite is meant industrial can utilize, and is the general designation of the ore formed of essential mineral with gibbsite, boehmite or diaspore.Adopting bayer process to produce aluminium oxide is a kind of comparatively economic method, but Bayer process requires the alumina silica ratio of bauxite greater than 8 usually.As everyone knows, the stripping temperature of gibbsitic bauxite is about 170 ℃, and the stripping temperature of boehmite type bauxite is about 220 ℃, and the stripping temperature of diaspore type bauxite is about 280 ℃, thereby gibbsitic bauxite is a kind of bauxite resource of high-quality.Existing in the world explored bauxite resource amount is about 550～75,000,000,000 tons, and except that the diaspore type bauxite of hundred million tons of ground 25-30 such as China, major part is gibbsitic bauxite and gibbsite and boehmite, diaspore mixed type bauxite.Except that containing a large amount of gibbsitic bauxites, also have the bauxite of quite a few gibbsite and boehmite, diaspore mixed type in states such as Russia, Australia, how this part bauxite of economic utilization is a world-famous puzzle.
At present, preliminary treatment desiliconization for gibbsitic bauxite mainly is to adopt fairly simple washup technology, utilize hydraulic action that the fine fraction siliceous mineral is separated with the coarse fraction aluminous ore, the fine fraction siliceous mineral abandons as mine tailing, and the above coarse fraction ore of 1-2mm is as the alumina producing raw material.But have a large amount of in low-grade bauxite that contains gibbsite type, boehmite type adopt the washup technology to be difficult to obtain the bauxite concentrate of qualified grade, the technic index of perhaps washup technology too poor (concentrate grade is still lower, and the alumina recovery rate is lower).Because this class gibbsite, the particle of boehmite mineral in ore are little, with silicon mineral associations such as kaolinite, quartz, disseminated grain size is fine, the hardness that adds gibbsite, boehmite is lower, close with gangue minerals such as kaolinites, so a large amount of gibbsites, boehmite valuable mineral and kaolinite be difficult to adopt the washup technical point from, cause containing a large amount of gibbsites and boehmite in the washup mine tailing, cause the waste of bauxite resource.
At present, China in low-grade diaspore type bauxite, adopt the ore dressing and desiliconizing technology to improve the ore alumina silica ratio, poor value is an effective way in the economical rationality utilization.And it is bigger at the difficulty of the flotation desilication of gibbsite type, boehmite, diaspore mixed type bauxite, subject matter is soft mineral such as gibbsite, through producing serious argillization phenomenon behind the ore grinding, be that ore grinding product granularity is meticulous, adopt floatation to be difficult to aluminium mineral and silicon mineral are separated.
Summary of the invention
The objective of the invention is at above-mentioned technical bottleneck, the method of a kind of gibbsite and boehmite, diaspore mixed type mineral dressing and silicon removal of bauxite is provided, can effectively solve such bauxite economical rationality and utilize problem, improve resource utilization, sustainable development provides strong resource guarantee to aluminum oxide industry.
Method of the present invention is achieved through the following technical solutions.
A kind of dressing process for desiliconizing of mixed type bauxite, it is characterized in that at first mixed type bauxite being carried out fragmentation, crushed product adds water slurrying makes the ore size degradation, by screening or grading technology fine fraction in the product and coarse fraction mineral are separated again, then with the fine grinding of isolated coarse fraction mineral, after the fine fraction product that fine grinding product and screening or classification are obtained mixes at last, carry out flotation.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention is characterized in that described mixed type bauxite shattering process, and the breakdown products granularity is less than 20mm.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention is characterized in that the described water pulping process that adds, and pulp density is 20%-80%.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention, it is characterized in that described floatation process is an one roughing, carry out twice or triple cleaning roughly selecting concentrate, carry out once purging selection to roughly selecting underflow, scanning foam returns and roughly selects, scan underflow and get rid of as mine tailing, last selected foam is the concentrate product, and other selected underflow order successively returns last operation.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention, it is characterized in that described floatation process, the collecting agent of selecting for use is one or more a mixture of oleic acid, aphthenic acids, hydroximic acid, sulfovinate, hydrocarbyl sulfonate, and consumption is the 700-1600g/t raw ore; The adjustment agent is a sodium carbonate, and its consumption is the 1000-6000g/t raw ore; Dispersant is a sodium phosphate, and its consumption is the 20-500g/t raw ore.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention is characterized in that the beneficiation reagent of described floatation process, and the dispersant sodium phosphate is a kind of or mixture of calgon, sodium orthophosphate, sodium pyrophosphate.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention is characterized in that the isolated coarse fraction of described screening or grading technology enters ore grinding, and ore grinding product granularity is for to account for 60%-95% less than 0.074mm.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention is characterized in that described mixed type bauxite breakdown products pulping process, adopts stirring, drum washer, vibrates the wet screening method in advance and carry out.
The dressing process for desiliconizing of a kind of mixed type bauxite of the present invention, it is characterized in that mixed type bauxite be gibbsitic bauxite, gibbsite and boehmite mixed type bauxite, contain the mixed type bauxite of gibbsite, boehmite, diaspore.
Adopt method of the present invention, a low-grade ore dressing and desiliconizing difficult problem that contains gibbsite, boehmite, diaspore mixed type bauxite in efficiently solving, the bauxite concentrate selection of qualified grade can be obtained, and good technology and economic indicator can be obtained.
After the invention process, low-grade gibbsite, boehmite, the diaspore mixed type mineral dressing and silicon removal of bauxite of containing in having realized; Under the condition that guarantees concentrate A/S ratio, has the higher rate of recovery; Technological process is simple, stable, strong operability; Enlarged the resource provision of bauxite,, the sustainable development of aluminum oxide industry has been had important economic implications and social effect for such bauxite resource of economic utilization provides technical support.
The present invention is directed to contain gibbsite mixed type bauxite and adopt the selected pulp granularity of selectivity size degradation method optimization after, cooperate efficient beneficiation reagent, realize that valuable mineral separates with gangue mineral, obtain bauxite concentrate selection than high-grade, technic index advanced person, economic benefit is good.
Description of drawings
Fig. 1 is the principle process chart of the inventive method.
The specific embodiment
A kind of dressing process for desiliconizing of mixed type bauxite, it is characterized in that mixed type bauxite is carried out fragmentation, adding water slurrying makes and contains gibbsite mixed type bauxite size degradation, isolate fine fraction and coarse fraction mineral in the product by screening or grading technology again, with the fine grinding of isolated coarse fraction mineral, after the fine fraction that ore grinding product and screening or classification are obtained mixes then, carry out flotation.
Embodiment 1
1. be sample with the low-grade gibbsitic bauxite ore of Fiji, the main thing phase composition of ore is gibbsite and kaolin.The raw ore chemical composition analysis sees Table 1, and material phase analysis sees Table 2.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity, adding water sizes mixing, pulp density is 20%～30%, ore pulp adopts drum washer to clean, clean 5～10min, the kaolin that is mingled with in the coarse grain ore under the effect of waterpower and stirring with the gibbsite particle separation, utilize spiral vibrating to sieve out+coarse grain of 1mm, the A/S of coarse grain can be directly as concentrate greater than 8; Be mainly gibbsite and kaolin in the product of-1mm, adopt the spiral classifier classification, + 0.1～+ particle of 0.074mm adopts ball mill to carry out selective milling, the granularity of overflow for-0.074mm content is 85～90%, with screening-ore pulp of 0.1～0.074mm mixes, enter tank diameter carry out in stirring size mixing.Adjusting agent is that sodium carbonate amount is 3000g/t, to slurry pH be 9.0, the consumption of sodium hexametaphosphate dispersant is 80g/t, collecting agent is aliphatic acid, aphthenic acids, a hydroximic acid mixture according to a certain percentage, consumption is 1200g/t.The closed circuit floatation process of and once purging selection selected through one roughing and twice, obtain with washup behind the concentrate foamed filter that obtains+rough concentrate of 1mm is a final concentrate, flotation tailing is a true tailings.The results are shown in Table 3:
The Fijian bauxite chemical composition analysis/% of table 1
The Fijian bauxite material phase composition of table 2 analysis/%
The Fijian bauxite flotation of table 3 is chemical composition analysis/% as a result
Embodiment 2
With low-grade gibbsite in the Saudi Arabia and boehmite mixed type bauxite is sample, and the thing phase composition of ore is mainly gibbsite, boehmite, kaolin and a small amount of quartzy.The chemistry analysis of raw ore sees Table 4, and material phase analysis sees Table 5.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity; adding water sizes mixing; pulp density is 30～60%; ore pulp is mechanical agitation 15～20min in agitator; gibbsite and boehmite particle can with kaolin generation selectivity size degradation; ore pulp is adopted vibrosieve, and the coarse grain of+0.1mm enters pair roller and further grinds, and ore is further dissociated.Ore milling product adopts vibrosieve, is mainly quartz sand among the+0.074mm, and A/S is lower than 1.5, directly abandons to make mine tailing; Vibrosieve-0.1mm ore pulp and-0.074mm ore pulp be mixed into tank diameter and stir in carrying out and size mixing.Adjusting agent is that sodium carbonate amount is 4000g/t, to slurry pH be 9.5, the consumption of sodium hexametaphosphate dispersant is 120g/t, collecting agent is that aliphatic acid, sulfovinate, hydroximic acid mix according to a certain percentage, consumption is 1200g/t.The closed circuit floatation process of and once purging selection selected through one roughing and twice, the concentrate foamed filter that obtains is a final concentrate, and flotation tailing abandons with screening+and the quartz sand of 0.074mm is mixed into true tailings.The results are shown in Table 6:
Table 4 Saudi Arabia bauxite chemical composition analysis/%
Table 5 Saudi Arabia bauxite mineral composition analysis/%
Table 6 Saudi Arabia bauxite flotation is chemical composition analysis/% as a result
Embodiment 3
With low-grade diasporite in the Chinese Chongqing and boehmite mixed type bauxite is sample.The thing phase composition of ore is mainly diaspore, boehmite, kaolin and illite.The raw ore chemistry analysis sees Table 7, and material phase analysis sees Table 8.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity, adding water sizes mixing, pulp density is 30～60%, ore pulp is mechanical agitation 5～10min in the agitator that adds a small amount of steel ball, boehmite, kaolin and illite matter soft with selecting property of diaspore size degradation, ore pulp is adopted screw classifying, classification goes out+and the coarse grain of 0.2mm enters ball mill and further grinds, ore is further dissociated, overflow is mixed into secondary grinding with the ore pulp of-0.2mm, in the overflow-and the content of 0.074mm is 85～90%, enters tank diameter and stirs in carrying out and size mixing.Adjusting agent is that sodium carbonate amount is 3000g/t, to slurry pH be 9.0, the consumption of sodium hexametaphosphate dispersant is 200g/t, collecting agent is that aliphatic acid, sulfovinate, hydroximic acid mix according to a certain percentage, consumption is 1600g/t.The closed circuit floatation process of and once purging selection selected through one roughing and twice, the concentrate foamed filter that obtains is a final concentrate, flotation tailing is a true tailings.The results are shown in Table 9:
The Chinese Chongqing of table 7 bauxite chemical composition analysis/%
The Chinese Chongqing of table 8 bauxite material phase composition analysis/%
The Chinese Chongqing of table 9 bauxite flotation is chemical composition analysis/% as a result
Embodiment 4
With certain low-grade gibbsite of Russia, boehmite and diaspore mixed type bauxite is sample, and the thing phase composition of ore is mainly boehmite, kaolin and a small amount of gibbsite and diaspore.The raw ore chemical composition analysis sees Table 10, thing phase composition analysis in table 11.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity, adding water sizes mixing, pulp density is 30～60%, mechanical agitation 15～20min in the agitator, adopt vibrosieve, the product of+0.5mm enters ball mill, ore milling product and screening-the 0.5mm ore pulp mixes through screw classifying, and ball mill is returned in sand return, in the overflow-content of 0.074mm particle is 80～85%, entering tank diameter sizes mixing, sodium carbonate amount is 4000g/t, and slurry pH is 9.5, and the consumption of dispersant sodium pyrophosphate is 120g/t, collecting agent is an aliphatic acid, aphthenic acids, hydroximic acid, hydrocarbyl sulfonate mixes according to a certain percentage, and consumption is 1400g/t.The closed circuit flotation operation of and once purging selection selected through one roughing and twice is final concentrate behind the concentrate foamed filter that obtains, flotation tailing is a true tailings.The results are shown in Table 12:
Certain bauxite chemical composition analysis/% of table 10 Russia
Certain bauxite material phase composition analysis/% of table 11 Russia
Certain bauxite flotation of table 12 Russia is chemical composition analysis/% as a result
Embodiment 5
With low-grade diasporite in the Guangxi China and gibbsite mixed type bauxite is sample, the thing phase composition diaspore of ore, kaolin and a small amount of gibbsite, and the raw ore chemical composition analysis sees Table 13, thing phase composition analysis in table 14.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity, adding water sizes mixing, pulp density is 20～30%, in drum washer, clean 3～5min, adopt the spiral classifier pre-classification, + 0.1mm enters the ball mill ore grinding, in the ore grinding product-and the content of 0.074mm is 85～90%; Screw classifying-0.1mm product employing vibrosieve, screening obtains-product of 0.03mm its be mainly kaolin, A/S is lower than 1.5 and directly makes mine tailing, product and ball mill ore grinding product are mixed in the tank diameter and size mixing on+the 0.03mm sieve, the consumption of adjusting agent sodium carbonate is 3000g/t, and slurry pH is 9.0, and the consumption of sodium hexametaphosphate dispersant is 80g/t, collecting agent is that aliphatic acid, aphthenic acids, hydroximic acid, hydrocarbyl sulfonate mix according to a certain percentage, and consumption is 1200g/t.Through the closed circuit flotation operation of one roughing, primary cleaning and once purging selection, it is final concentrate with former rough concentrate that the concentrate that obtains filters the back, and the product of flotation tailing and vibrosieve-0.03mm is mixed into true tailings.Flotation results sees Table 15:
The Chinese Pingguo of table 13 bauxite chemical composition analysis/%
The Chinese Pingguo of table 14 bauxite material causes analysis/% mutually
The Chinese Pingguo of table 15 bauxite flotation is chemical composition analysis/% as a result
Embodiment 6
With certain low-grade gibbsite of Australia and boehmite mixed type bauxite is sample, and the thing phase composition of ore is mainly gibbsite, boehmite, kaolin and quartz.The chemical composition analysis of raw ore sees Table 16, thing phase composition analysis in table 17.
Ore adopts jaw crusher to carry out selectivity size degradation to granularity; adding water sizes mixing; pulp density is 30～50%; ore pulp is cleaned 5～10min in drum washer; gibbsite and boehmite particle can with kaolin generation selectivity size degradation; adopt vibratory sieve to carry out vibrosieve to ore pulp, the screening particle diameter is 0.5mm and 0.1mm.In the screening product-and 0.5mm-+0.1mm is mainly quartz sand, and A/S directly makes mine tailing less than 1.4; The product of+0.5mm enters ball mill and carries out selective milling, and the fineness of ore grinding product is 85～90% for the content of-0.074mm, with the screening product-0.1mm is mixed into tank diameter and sizes mixing.Adjusting agent is that sodium carbonate amount is 4000g/t, to slurry pH be 9.5, the consumption of sodium hexametaphosphate dispersant is 80g/t, collecting agent is aliphatic acid, aphthenic acids, hydroximic acid, a hydrocarbyl sulfonate mixture according to a certain percentage, consumption is 1400g/t.The closed circuit floatation process of and once purging selection operation selected through one roughing and twice, the concentrate foamed filter that obtains is a final concentrate, flotation tailing and screening-0.5mm-+0.1mm quartz sand is mixed into true tailings.
The results are shown in Table 18:
Table 6-1 certain bauxite chemical composition analysis/% of Australia
Table 6-2 certain bauxite essential mineral composition analysis/% of Australia
Certain bauxite flotation of table 6-3 Australia is chemical composition analysis/% as a result
Claims (8)
1. the dressing process for desiliconizing of a mixed type bauxite, it is characterized in that at first mixed type bauxite being carried out fragmentation, crushed product adds water slurrying makes the ore size degradation, by screening or grading technology fine fraction in the product and coarse fraction mineral are separated again, then with the fine grinding of isolated coarse fraction mineral, after the fine fraction product that fine grinding product and screening or classification are obtained mixes at last, carry out flotation.
2. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1 is characterized in that the broken maximum particle size of described mixed type bauxite is less than 20mm.
3. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1 is characterized in that the described water pulping process that adds, and pulp density is 20%-80%.
4. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1, it is characterized in that described floatation process is an one roughing, carry out twice or triple cleaning roughly selecting concentrate, carry out once purging selection to roughly selecting underflow, scanning foam returns and roughly selects, last selected foam is the concentrate product, and other selected underflow order successively returns last operation.
5. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1, it is characterized in that described floatation process, flotation collector is more than one a mixture of oleic acid, aphthenic acids, hydroximic acid, sulfovinate, hydrocarbyl sulfonate, and consumption is the 700-1600g/t raw ore; The adjustment agent is a sodium carbonate, and its consumption is the 1000-6000g/t raw ore; Dispersant is a sodium phosphate, and its consumption is the 20-500g/t raw ore.
6. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1 is characterized in that described floatation process, and flotation dispersant sodium phosphate is a kind of or its mixture of calgon, sodium orthophosphate, sodium pyrophosphate.
7. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1 is characterized in that describedly isolating coarse fraction by screening or grading technology, carries out fine grinding again, and fineness is for being 60%-95% less than the 0.074mm grain size content after the fine grinding.
8. the dressing process for desiliconizing of a kind of mixed type bauxite according to claim 1 is characterized in that carrying out slurrying after the fragmentation of described mixed type bauxite, the stirring of employing, drum washer slurrying and vibrate the wet screening method in advance and carry out.
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