CN102806146A - Method for performing beneficiation and desilicification on bauxite - Google Patents
Method for performing beneficiation and desilicification on bauxite Download PDFInfo
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- CN102806146A CN102806146A CN2012102621483A CN201210262148A CN102806146A CN 102806146 A CN102806146 A CN 102806146A CN 2012102621483 A CN2012102621483 A CN 2012102621483A CN 201210262148 A CN201210262148 A CN 201210262148A CN 102806146 A CN102806146 A CN 102806146A
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Abstract
The invention discloses a method for performing beneficiation and desilicification on bauxite and relates to improvement of a direct flotation and desilicification method for high-ferrum bauxite. The beneficiation method comprises the following steps of: grinding bauxite, and adding a flotation reagent to perform rough flotation, scavenging and concentration, and is characterized in that after bottom flow obtained after rough floatation is classified, coarse fraction products obtained after classification are ground, and the ground coarse fraction products are subjected to secondary rough floatation and desilicification in a rough floatation process; and fine fraction products obtained after classification are fed for scavenging and are s subjected to floatation and desilicification. By the method, the high-ferrum bauxite can be subjected to flotation and desilicification, the grades of flotation concentrate can be greatly improved, the aluminum-to-silicon ratio of the bauxite flotation concentrate obtained after floatation, desilicification, and ferrum reduction is increased by 3 to 6 compared with that of raw ore, and the recover rate of floatation alumina is more than 80 percent. The high-ferrum bauxite treated by the method has the advantages of simple and practicable process, obvious separation effect, and low engineering investment.
Description
Technical field
A kind of dressing process for desiliconizing bauxite relates to the direct-flotation desiliconisation method of the low-grade high-iron bauxite of diaspore type, the low-grade high-iron bauxite of boehmite type or diaspore boehmite mixed type high-iron bauxite.
Technical background
China also has the high-iron bauxite resource that reserves are about 1,500,000,000 tons, mainly is divided into a diaspore type high-iron bauxite and gibbsite type high-iron bauxite.Main aluminum-containing mineral is diaspore, boehmite in the low-grade diaspore type high-iron bauxite ore; Has the iron oxide content height; Alumina content is low; The characteristics that alumina silica ratio is low, based on These characteristics, the utilization rate of high-iron bauxite in the aluminium oxide smelting industry remains at low levels always.
Some domestic colleges and universities and scientific research institution successively carry out comprehensive utilizating research to high-iron bauxite, and the general ore dressing research method that adopts has magnetic separation to select iron and person's magnetizing roast-magnetic separation separating technology, obtain iron ore concentrate and aluminium concentrate through magnetic separation separation of iron, aluminium.The method that adopts magnetic separation to separate has certain sorting for the iron aluminium mineral; But sorting result is not obvious; Chief reason is: the iron mineral in the high-iron bauxite mainly exists with magnetic faint bloodstone and goethite form, is difficult to realize that through magnetic separation ferro-aluminum separates; And the symbiosis of iron, aluminium mineral is tight, adopts magnetic selection method to carry out the ore dressing deironing and has the shortcoming that the efficiency of separation is low, the alumina loss rate is high.
It is the effective way that improves this kind grade of ore that silicon falls in flotation; Through adding the surface hydrophobic that floating agent changes aluminium, silicon, iron mineral; Set up they and the selective absorption of collecting agent relation; Method through air flotation makes with a diaspore to be that master's mineral are separated from ore pulp with the form of foam again, and most silicate mineral then rests in the ore pulp.Mode through flotation can increase substantially the alumina silica ratio in the ore, reduces the grade of concentrate iron oxide to a certain extent, thereby improves the economy of the high iron ore bauxite of low-grade diaspore type alumina producing Bayer process.
Summary of the invention
The direct-flotation desiliconisation method that the purpose of this invention is to provide the low-grade high-iron bauxite of diaspore type, the low-grade high-iron bauxite of boehmite type or diaspore boehmite mixed type high-iron bauxite.
The objective of the invention is to realize through following technical scheme.
A kind of dressing process for desiliconizing of bauxite, the step of its ore dressing process comprise with bauxite at ore grinding, add floating agent and roughly select, scan with selected; Underflow after it is characterized in that roughly selecting carries out classification, after the coarse fraction product that classification is obtained carries out ore grinding, goes into to roughly select flow process and carries out secondary and roughly select desiliconization; The fine fraction product that classification obtains feeds to be scanned flow process and carries out flotation desilication.
The dressing process for desiliconizing of a kind of bauxite of the present invention; It is characterized in that all foams of roughly selecting get into cleaning technological flowasheet and carry out flotation and obtain flotation concentrate, all roughly select fine fraction ore pulp that underflow obtains through classification and get into and obtain flotation tailing after scanning the flow process flotation.
The dressing process for desiliconizing of a kind of bauxite of the present invention, it is characterized in that with the underflow after roughly selecting carry out grade that classification obtains the coarse fraction product for+325 order grain size contents greater than 30%.
The dressing process for desiliconizing of a kind of bauxite of the present invention, it is characterized in that with the underflow after roughly selecting carry out grade that classification obtains the fine fraction product for-325 order grain size contents greater than 70%.
The dressing process for desiliconizing of a kind of bauxite of the present invention, the underflow after it is characterized in that roughly selecting carry out classification obtain coarse fraction product ore grinding to fineness for-0.075mm greater than 90%.。
The dressing process for desiliconizing of a kind of bauxite of the present invention; It is characterized in that handled ore is diaspore type high-iron bauxite, boehmite type high-iron bauxite or diaspore boehmite mixed type high-iron bauxite, the ferric oxide content of ore is more than or equal to 10%.
The dressing process for desiliconizing of a kind of bauxite of the present invention; It is characterized in that roughly selecting coarse fraction ore pulp that the underflow classification obtains carry out can returning behind the secondary grinding former roughly select flow process or get into second section roughly select flow process and carry out flotation desilication once more, two sections underflows of roughly selecting flow process mix the back and get into the scalable stream journeys.
The dressing process for desiliconizing of a kind of bauxite of the present invention is characterized in that all foams or underflow in the floatation process carries out according to conventional ore-dressing technique that order is returned or merge the ore pulp flow process according to the close principle of grade.
The dressing process for desiliconizing of a kind of high-iron bauxite of the present invention has good effect for the monohydrate bauxite ore flotation desilication.Adopt method of the present invention that high-iron bauxite is carried out flotation desilication, can increase substantially the grade of flotation concentrate, the alumina silica ratio that falls the bauxite flotation concentrate of iron acquisition through flotation desilication has improved 3～6 than raw ore, and flotation alumina recovery rate is all greater than 80%.It is simple for process to adopt this method processing high-iron bauxite to have, and separating effect is remarkable, the advantage that construction investment is little.
Description of drawings
Fig. 1 regrinds for the coarse grain chats and returns the former process chart of roughly selecting.
Fig. 2 regrinds for the coarse grain chats and gets into second section and roughly select process chart.
The specific embodiment
A kind of dressing process for desiliconizing of high-iron bauxite; With bauxite after mog-0.075mm content is 70%～90%; Add pH adjustment agent, dispersant, inhibitor and collecting agent successively, ore pulp is roughly selected the flow process ore dressing, will roughly select underflow again and carry out classification; Classification obtains+325 order grain size contents greater than 30% coarse fraction product carry out secondary grinding to-0.075mm greater than 90% mog, the secondary grinding product feeds to be roughly selected flow process and carries out secondary and roughly select desiliconization; Classification obtains-325 order grain size contents and feeds greater than 70% fine fraction ore pulp product and scan flow process and carry out flotation desilication; All foams of roughly selecting get into cleaning technological flowasheet and carry out flotation and obtain flotation concentrate, all roughly select fine fraction ore pulp that underflow obtains through classification and get into and obtain flotation tailing after scanning the flow process flotation.
Embodiment 1
Certain high-iron bauxite raw ore alumina silica ratio 4.67, wherein alumina content 47.48%, dioxide-containing silica 10.17%, iron oxide content 24.70%.1, the first section mog of employed flotation flowsheet such as accompanying drawing is-0.075mm grade 80% that employed floating agent is: sodium carbonate 6000g/t; Calgon 60g/t; Cornstarch 800g/t, bauxite forward flotation collecting agent 900g/t, the result of the test that obtains is following:
| Product | γ/% | Al 2O 3/% | SiO 2/% | Fe 2O 3/% | A/S | ε Al2O3/% |
| Concentrate | 71.22 | 54.41 | 6.24 | 19.27 | 8.72 | 81.62 |
| Mine tailing | 28.78 | 30.32 | 19.88 | 38.12 | 1.53 | 18.38 |
| Add up to | 100.00 | 47.48 | 10.17 | 24.70 | 4.67 | 100.00 |
Embodiment 2
Certain high-iron bauxite raw ore alumina silica ratio 5.25, wherein alumina content 47.86%, dioxide-containing silica 9.12%, iron oxide content 24.36%.1, the first section mog of employed flotation flowsheet such as accompanying drawing is-0.075mm grade 83% that employed floating agent is: sodium carbonate 6000g/t; Calgon 60g/t; Cornstarch 800g/t, bauxite forward flotation collecting agent 800g/t, the result of the test that obtains is following:
| Product | γ/% | Al 2O 3/% | SiO 2/% | Fe 2O 3/% | A/S | ε Al2O3/% |
| Concentrate | 73.67 | 54.41 | 5.52 | 20.2 | 9.86 | 83.75 |
| Mine tailing | 26.33 | 29.53 | 19.21 | 36 | 1.54 | 16.25 |
| Add up to | 100.00 | 47.86 | 9.12 | 24.36 | 5.25 | 100.00 |
Embodiment 3
Certain high-iron bauxite raw ore alumina silica ratio 6.31, wherein alumina content 49.42%, dioxide-containing silica 7.84%, iron oxide content 25.22%.2, the first sections mogs of employed flotation flowsheet such as accompanying drawing are-0.075mm grade 78% that employed floating agent is: sodium carbonate 6000g/t; Calgon 60g/t; Cornstarch 800g/t, bauxite forward flotation collecting agent 800g/t, the result of the test that obtains is following:
| Product | γ/% | Al 2O 3/% | SiO 2/% | Fe 2O 3/% | A/S | ε Al2O3/% |
| Concentrate | 78.12 | 56.11 | 4.75 | 20.11 | 11.81 | 88.70 |
| Mine tailing | 21.88 | 25.53 | 18.86 | 43.46 | 1.35 | 11.30 |
| Add up to | 100.00 | 49.42 | 7.84 | 25.22 | 6.31 | 100.00 |
Embodiment 4
Certain high-iron bauxite raw ore alumina silica ratio 5.77, wherein alumina content 51.02%, dioxide-containing silica 8.84%, iron oxide content 24.79%.2, the first sections mogs of employed flotation flowsheet such as accompanying drawing are-0.075mm grade 81% that employed floating agent is: sodium carbonate 6000g/t; Calgon 60g/t; Cornstarch 800g/t, bauxite forward flotation collecting agent 800g/t, the result of the test that obtains is following:
| Product | γ/% | Al 2O 3/% | SiO 2/% | Fe 2O 3/% | A/S | ε Al2O3/% |
| Concentrate | 75.38 | 58.29 | 5.23 | 19.06 | 11.15 | 86.12 |
| Mine tailing | 24.62 | 28.76 | 19.88 | 42.33 | 1.45 | 13.88 |
| Add up to | 100.00 | 51.02 | 8.84 | 24.79 | 5.77 | 100.00 |
Claims (8)
1. the dressing process for desiliconizing of a bauxite, the step of its ore dressing process comprise with bauxite at ore grinding, add floating agent and roughly select, scan with selected; Underflow after it is characterized in that roughly selecting carries out classification, after the coarse fraction product that classification is obtained carries out ore grinding, goes into to roughly select flow process and carries out secondary and roughly select desiliconization; The fine fraction product that classification obtains feeds to be scanned flow process and carries out flotation desilication.
2. the dressing process for desiliconizing of a kind of bauxite according to claim 1; It is characterized in that all foams of roughly selecting get into cleaning technological flowasheet and carry out flotation and obtain flotation concentrate, all roughly select fine fraction ore pulp that underflow obtains through classification and get into and obtain flotation tailing after scanning the flow process flotation.
3. the dressing process for desiliconizing of a kind of bauxite according to claim 1, it is characterized in that with the underflow after roughly selecting carry out grade that classification obtains the coarse fraction product for+325 order grain size contents greater than 30%.
4. the dressing process for desiliconizing of a kind of bauxite according to claim 1, it is characterized in that with the underflow after roughly selecting carry out grade that classification obtains the fine fraction product for-325 order grain size contents greater than 70%.
5. the dressing process for desiliconizing of a kind of bauxite according to claim 1, the underflow after it is characterized in that roughly selecting carry out classification obtain coarse fraction product ore grinding to fineness for-0.075mm greater than 90%.
6. the dressing process for desiliconizing of a kind of bauxite according to claim 1; It is characterized in that handled ore is diaspore type high-iron bauxite, boehmite type high-iron bauxite or diaspore boehmite mixed type high-iron bauxite, the ferric oxide content of ore is more than or equal to 10%.
7. the dressing process for desiliconizing of a kind of bauxite according to claim 1; It is characterized in that roughly selecting coarse fraction ore pulp that the underflow classification obtains carry out can returning behind the secondary grinding former roughly select flow process or get into second section roughly select flow process and carry out flotation desilication once more, two sections underflows of roughly selecting flow process mix the back and get into the scalable stream journeys.
8. the dressing process for desiliconizing of a kind of bauxite according to claim 1 is characterized in that all foams or underflow in the floatation process carries out according to conventional ore-dressing technique that order is returned or merge the ore pulp flow process according to the close principle of grade.
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Cited By (10)
| 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 |
| CN104826729A (en) * | 2015-05-29 | 2015-08-12 | 张松波 | Bauxite beneficiation method |
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN105289836A (en) * | 2015-12-01 | 2016-02-03 | 陈均宁 | Beneficiation method for comprehensive utilization of high iron aluminum ore |
| CN105344463A (en) * | 2015-11-25 | 2016-02-24 | 昆明冶金研究院 | Method for sorting bauxite with medium-low alumina-silica ratio |
| CN107486339A (en) * | 2017-10-11 | 2017-12-19 | 江西理工大学 | A kind of preparation method and applications of bauxite forward flotation collecting agent |
| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| 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 |
| CN112007762A (en) * | 2019-12-16 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Positive flotation regulator for collophanite containing high sesquioxide, method and application |
| CN113304888A (en) * | 2021-05-26 | 2021-08-27 | 广西中金岭南矿业有限责任公司 | Speed-division flotation process for sphalerite |
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| 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 |
| CN101757986A (en) * | 2009-12-18 | 2010-06-30 | 中国铝业股份有限公司 | Method for floating bauxite |
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- 2012-07-27 CN CN2012102621483A patent/CN102806146A/en active Pending
Patent Citations (3)
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| JPH0747301A (en) * | 1993-08-05 | 1995-02-21 | Sumitomo Chem Co Ltd | Method for removing silica-containing material from alumina-containing ore |
| 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 |
| CN101757986A (en) * | 2009-12-18 | 2010-06-30 | 中国铝业股份有限公司 | Method for floating bauxite |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN104826729A (en) * | 2015-05-29 | 2015-08-12 | 张松波 | Bauxite beneficiation method |
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN105344463B (en) * | 2015-11-25 | 2018-07-13 | 昆明冶金研究院 | One kind selecting method for distinguishing for middle low alumina-silicon ratio alumyte |
| CN105344463A (en) * | 2015-11-25 | 2016-02-24 | 昆明冶金研究院 | Method for sorting bauxite with medium-low alumina-silica ratio |
| CN105289836A (en) * | 2015-12-01 | 2016-02-03 | 陈均宁 | Beneficiation method for comprehensive utilization of high iron aluminum ore |
| CN107486339A (en) * | 2017-10-11 | 2017-12-19 | 江西理工大学 | A kind of preparation method and applications of bauxite forward flotation collecting agent |
| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| CN108187878B (en) * | 2017-12-29 | 2021-02-02 | 中业纳米科技(烟台)有限公司 | One-section semi-closed-circuit ore grinding and grading process |
| 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 |
| CN112007762A (en) * | 2019-12-16 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Positive flotation regulator for collophanite containing high sesquioxide, method and application |
| CN113304888A (en) * | 2021-05-26 | 2021-08-27 | 广西中金岭南矿业有限责任公司 | Speed-division flotation process for sphalerite |
| CN113304888B (en) * | 2021-05-26 | 2023-03-31 | 广西中金岭南矿业有限责任公司 | Speed-division flotation process for sphalerite |
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Application publication date: 20121205 |