CN102120195A - Ore grinding flotation silicon-removing method of bauxite - Google Patents
Ore grinding flotation silicon-removing method of bauxite Download PDFInfo
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- CN102120195A CN102120195A CN2010105876998A CN201010587699A CN102120195A CN 102120195 A CN102120195 A CN 102120195A CN 2010105876998 A CN2010105876998 A CN 2010105876998A CN 201010587699 A CN201010587699 A CN 201010587699A CN 102120195 A CN102120195 A CN 102120195A
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- flotation
- bauxite
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- ore grinding
- underflow
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- 238000005188 flotation Methods 0.000 title claims abstract description 56
- 238000000227 grinding Methods 0.000 title claims abstract description 44
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000012141 concentrate Substances 0.000 claims abstract description 18
- 239000006260 foam Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229910001648 diaspore Inorganic materials 0.000 claims description 9
- 229910001679 gibbsite Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 10
- 239000011707 mineral Substances 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000007667 floating Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005029 sieve analysis Methods 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000011175 product filtration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention relates to a process for removing impurities from bauxite, in particular to an ore grinding flotation silicon-removing method of bauxite, which comprises the steps of: carrying out primary floatation on the bauxite after rough grinding, wherein the floated foam is used as a concentrate product; carrying out secondary ore grinding on floating underflow; and carrying out secondary floatation after secondary ore grinding, wherein the floated foam is used as a concentrate product and the underflow is used as tailings to be discharged. The invention has the characteristics of proper granularity of flotation pulp, reasonable fraction distribution, shortened process flow, reduced mineral dressing cost and improved floatation recycling rate due to the adoption of reasonable configuration of ore grinding and floating and equipment selection.
Description
Technical field
A kind of grinding flotation desilication method of bauxite relates to a kind of bauxite, comprises the flotation desilication method of diaspore type, gibbsite type and mixed type bauxite.
Technical background
" ore dressing-producing aluminium oxide by bayer new technology " is to meet the most competitive production technology of China's bauxite resource situation, obtains common recognition gradually in industry.Along with the high speed development of China's aluminium industry, the aggravation dilution of bauxite resource, it is particularly important that ore dressing and desiliconizing seems.
At present, the direct-flotation desiliconisation technology of diaspore type bauxite is ripe relatively, realized industrialization, and obtained effect preferably, but flotation granularity and grade distribution affect product sedimentation, product filtration, technic index, ore dressing energy consumption etc. all the time.Not only require mineral monomer to dissociate during flotation, and require to be ground to suitable granularity, ore particle is too thick, even mineral monomer dissociation, because surpass the floating loading capability of bubble, ore particle can not float; Ore particle is too thin, and flotation effect is also very poor, and the following of flotation grade is limited to about 7 microns.Though by grinding process optimization, intensified operation the selected grade of bauxite is made moderate progress, can not be from deal with problems at all.To diaspore type bauxite, purpose mineral diaspore is hard than gangue mineral, property is crisp, and the part mineral easily grind, and the difficult mill of another part mineral adds that sizing of equipment efficient is not high, and the ore grinding that repeatedly circulates is easy to overground and polarization; If put the corase grind ore deposit, have a strong impact on separation index, mine tailing alumina silica ratio height, the alumina recovery rate is low.At this problem, patent 200710179654.5 has adopted puts corase grind ore deposit-chats classification-coarse grain regrinding and reconcentration, facts have proved that this process is relatively good, but increased the classification operation that flow process prolongs; The particulate of product from failing is too many, and the mine tailing sedimentation brings problem.Patent 200610098704 is carried out selective milling to high-grade coarse fraction targetedly, realize the coarse grain fast-flotation and guaranteed grade, the rate of recovery, the coarse fraction of concentrate, but the efficient of pre-classification is lower, and technological operation controlled condition requires high.
To gibbsitic bauxite and mixed type bauxite, because ore is softer, traditional ore grinding makes argillization serious, separating effect is very poor, to sort, product dehydration, mine tailing sedimentation cause very big difficulty, so low-grade gibbsite and the desiliconization of mixed type bauxite flotation rest on the laboratory research stage so far, the flotation fine size is a still unsolved difficult problem.
In a word, it is the key issue of flotation desilication that the granularity of selected ore pulp and grade distribute, and this is concerning grinding attachment, grinding process, ore grinding parameter, ore grinding operation, resolves the ore grinding of bauxite and the problem of flotation, and technology must break through tradition.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned technology, the grinding flotation desilication method of the bauxite that provide a kind of granularity of ore dressing slurry suitable, grade distributes rationally, technological process is short, beneficiation cost is low, flotation recovery rate is high.
The objective of the invention is to be achieved through the following technical solutions.
A kind of grinding flotation desilication method of bauxite is characterized in that and will carry out a flotation after the bauxite corase grind that the foam of emersion is as the concentrate product; The flotation underflow carries out secondary grinding; Carry out secondary flotation behind the secondary grinding again, the foam of emersion is as the concentrate product, and underflow is discharged as mine tailing.
The process of a kind of bauxite removal of impurities of the present invention is characterized in that described bauxite corase grind, and its mog is for being 30%-70% less than 0.074mm content.
The process of a kind of bauxite removal of impurities of the present invention is characterized in that described secondary grinding, and grinding attachment adopts vertical stirring mill or tower mill, feeds 0.5-10m in the mill
3The gas of/h.
The process of a kind of bauxite removal of impurities of the present invention is characterized in that a described flotation and secondary flotation, and the floatation equipment of employing is a common flotation.
The process of a kind of bauxite removal of impurities of the present invention is characterized in that this method is suitable for all diaspore types, gibbsite type and the mixed type bauxite that alumina silica ratio is 2.5-6.5.
Characteristics of the present invention: adopt the reasonable disposition and the lectotype selection of ore grinding, flotation, make the granularity of flotation pulp suitable, grade distributes rationally, technological process shortening, beneficiation cost reduce, flotation recovery rate improves.A flotation has concurrently and sorts, the function of classification, improves the coarse fraction content of concentrate; Secondary grinding adopts vertical stirring mill or tower mill, and feeds certain gas, and secondary grinding has the function of ore grinding, classification, flotation concurrently, qualified grade is in time discharged, reduced the overground situation of mineral, the grade of having optimized product distributes, and is strong in the subsequent treatment of product.
Description of drawings
The principle process chart of Fig. 1 method of the present invention.
Fig. 2 layout of equipment of the present invention.
The specific embodiment
A kind of grinding flotation desilication method of bauxite will carry out a flotation after the bauxite corase grind, and the foam of emersion is as the concentrate product; The flotation underflow carries out secondary grinding; Carry out secondary flotation behind the secondary grinding again, the foam of emersion is as the concentrate product, and underflow is discharged as mine tailing.
Below in conjunction with example the present invention is done a step explanation.
Embodiment 1
With the diaspore type bauxite is the test sample ore, and its chemical constituent sees Table 1, and mineral composition sees Table 2.
Table 1 diaspore type bauxite chemical constituent
The phase composition of table 2 diaspore type bauxite thing
Process equipment: one time ore grinding adopts grate ball mill, and secondary grinding adopts vertical stirring mill, and the flotation seat in the plane is outside inflation agitation impeller flotator, 2 flotation devices of a flotation, 4 flotation devices of secondary flotation.
Technological process: see basic flowsheet of coal preparation (accompanying drawing 1).
Technological parameter: the primary grinding fineness is 70.58%, and it is 5m that vertical stirring mill feeds gas
3/ h, regime of agent are conventional direct flotation regime of agent.
Technic index: see Table 3.
Table 3 example 1 floatation indicators
As shown in Table 3, by sorting of patent of invention technic index, obtain concentrate alumina silica ratio 6.08, productive rate is 86.55% good index.
Concentrate has been carried out sieving, and screening result sees Table 4.
The 1 concentrate sieve analysis of table 4 example
As shown in Table 4,-21 μ m content only are that 18.24 ,-38 μ m content are 42.74 in the concentrate, and common process flow process concentrate-21 μ m content is about 40%, reduction by a relatively large margin the fine fraction in the concentrate, for the dehydration of rapid subsidence and product is laid a good foundation.
Embodiment 2
With gibbsite mixed type bauxite is the test sample ore, and its chemical constituent sees Table 5, and mineral composition sees Table 6.
Table 5 gibbsite mixed type bauxite chemical constituent
The phase composition of table 6 gibbsite mixed type bauxite material
Process equipment: one time ore grinding adopts grate ball mill, and secondary grinding adopts vertical stirring mill, and the flotation seat in the plane is outside inflation agitation impeller flotator, 1 flotation device of a flotation, 3 flotation devices of secondary flotation.
Technological process: see basic flowsheet of coal preparation (accompanying drawing 1).
Technological parameter: the primary grinding fineness is 30.58%, and it is 3.5m that vertical stirring mill feeds gas
3/ h, regime of agent are conventional reverse floatation agent system.
Technic index: see Table 7.
Table 7 example 2 floatation indicators
As shown in Table 7, by sorting of patent of invention technic index, obtain concentrate alumina silica ratio 7.72, productive rate is 91.33% good index.
Product has been carried out sieve analysis, and screening result sees Table 8.
The 2 product sieve analysis of table 8 example
As shown in Table 8 ,-21 μ m content only are 25.04 in the concentrate, and common process flow process concentrate-21 μ m content is about 50%, reduction by a relatively large margin the fine fraction in the concentrate;-21 μ m content only are 33.59% in the mine tailing, and micro-size fraction content all declines to a great extent, for subsequent sedimentation and product treatment are laid a good foundation.
Claims (5)
1. the grinding flotation desilication method of a bauxite is characterized in that and will carry out a flotation after the bauxite corase grind, and the foam of emersion is as the concentrate product; The flotation underflow carries out secondary grinding; Carry out secondary flotation behind the secondary grinding again, the foam of emersion is as the concentrate product, and underflow is discharged as mine tailing.
2. the grinding flotation desilication method of a kind of bauxite according to claim 1 is characterized in that: described bauxite corase grind, its mog is for being 30%-70% less than 0.074mm content.
3. the grinding flotation desilication method of a kind of bauxite according to claim 1,, it is characterized in that described secondary grinding, grinding attachment adopts vertical stirring mill or tower mill, feeds 0.5-10m in the mill
3The gas of/h.
4. the grinding flotation desilication method of a kind of bauxite according to claim 1 is characterized in that a described flotation and secondary flotation, and the floatation equipment of employing is a common flotation.
5. the grinding flotation desilication method of a kind of bauxite according to claim 1, it is characterized in that: being suitable for alumina silica ratio is all diaspore types, gibbsite type and the mixed type bauxite of 2.5-6.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105876998A CN102120195A (en) | 2010-12-15 | 2010-12-15 | Ore grinding flotation silicon-removing method of bauxite |
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| CN2010105876998A CN102120195A (en) | 2010-12-15 | 2010-12-15 | Ore grinding flotation silicon-removing method of bauxite |
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| CN2010105876998A Pending CN102120195A (en) | 2010-12-15 | 2010-12-15 | Ore grinding flotation silicon-removing method of bauxite |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480497A (en) * | 2013-09-25 | 2014-01-01 | 中国地质科学院郑州矿产综合利用研究所 | Combined collector for direct flotation of diasporic bauxite and using method thereof |
| CN104923368A (en) * | 2015-06-10 | 2015-09-23 | 中蓝连海设计研究院 | Ore grinding and beneficiation process for siliceous phosphorite |
| CN107812590A (en) * | 2016-09-14 | 2018-03-20 | 中国地质科学院矿产综合利用研究所 | Selective dissociation strengthening separation method for fine particles difficult to separate |
| CN108452941A (en) * | 2018-02-07 | 2018-08-28 | 中南大学 | A kind of method for floating of bauxite |
| CN110586316A (en) * | 2019-09-11 | 2019-12-20 | 兰州高斯年代岩石矿物分选技术服务有限公司 | Purification process of Lu bauxite ore |
| CN111921718A (en) * | 2020-08-27 | 2020-11-13 | 中国铝业股份有限公司 | Potassium-removing flotation method for potassium-containing bauxite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB196944A (en) * | 1921-10-28 | 1923-04-30 | Hermann Plauson | Improved process of separating minerals mechanically |
| CN1207962A (en) * | 1998-07-22 | 1999-02-17 | 北京矿冶研究总院 | Bauxite flotation method |
| CN101081375A (en) * | 2007-07-12 | 2007-12-05 | 中国铝业股份有限公司 | Grinding method of alumyte |
| CN101176863A (en) * | 2007-12-17 | 2008-05-14 | 中国铝业股份有限公司 | Method for sorting and separating ore from aluminum silicon mineral |
-
2010
- 2010-12-15 CN CN2010105876998A patent/CN102120195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB196944A (en) * | 1921-10-28 | 1923-04-30 | Hermann Plauson | Improved process of separating minerals mechanically |
| CN1207962A (en) * | 1998-07-22 | 1999-02-17 | 北京矿冶研究总院 | Bauxite flotation method |
| CN101081375A (en) * | 2007-07-12 | 2007-12-05 | 中国铝业股份有限公司 | Grinding method of alumyte |
| CN101176863A (en) * | 2007-12-17 | 2008-05-14 | 中国铝业股份有限公司 | Method for sorting and separating ore from aluminum silicon mineral |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480497A (en) * | 2013-09-25 | 2014-01-01 | 中国地质科学院郑州矿产综合利用研究所 | Combined collector for direct flotation of diasporic bauxite and using method thereof |
| CN103480497B (en) * | 2013-09-25 | 2015-04-29 | 中国地质科学院郑州矿产综合利用研究所 | Combined collector for direct flotation of diasporic bauxite and using method thereof |
| CN104923368A (en) * | 2015-06-10 | 2015-09-23 | 中蓝连海设计研究院 | Ore grinding and beneficiation process for siliceous phosphorite |
| CN107812590A (en) * | 2016-09-14 | 2018-03-20 | 中国地质科学院矿产综合利用研究所 | Selective dissociation strengthening separation method for fine particles difficult to separate |
| CN108452941A (en) * | 2018-02-07 | 2018-08-28 | 中南大学 | A kind of method for floating of bauxite |
| CN110586316A (en) * | 2019-09-11 | 2019-12-20 | 兰州高斯年代岩石矿物分选技术服务有限公司 | Purification process of Lu bauxite ore |
| CN111921718A (en) * | 2020-08-27 | 2020-11-13 | 中国铝业股份有限公司 | Potassium-removing flotation method for potassium-containing bauxite |
| CN111921718B (en) * | 2020-08-27 | 2022-04-26 | 中国铝业股份有限公司 | Potassium-removing flotation method for potassium-containing bauxite |
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Application publication date: 20110713 |