CN1128022C - Ore dressing and desiliconizing process of bauxite - Google Patents
Ore dressing and desiliconizing process of bauxite Download PDFInfo
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- CN1128022C CN1128022C CN 01114525 CN01114525A CN1128022C CN 1128022 C CN1128022 C CN 1128022C CN 01114525 CN01114525 CN 01114525 CN 01114525 A CN01114525 A CN 01114525A CN 1128022 C CN1128022 C CN 1128022C
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- bauxite
- flotation
- ore
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Abstract
The present invention relates to an ore dressing and desiliconizing process of bauxite, which comprises the technical processes of grinding ores, grading, flotation, etc. The bauxite ores are ground and graded into a coarse particle grade and a fine particle grade, the coarse particle grade is ore concentrate 1, a flotation agent is added in the fine particle grade for flotation so as to obtain floatation concentrate as ore concentrate 2, and the ore concentrate 1 and the ore concentrate 2 are combined as the ore concentrate of bauxite ore dressing. The present invention assures that the fineness of the ore concentrate is coarser than that of ground ores, so the consumption of the floatation operation agent is reduced by more than 30%, and the processing capacity of the flotation operation is increased by 30 to 50%. Therefore, the present invention has the advantages of good Al/Si separation effect, stable production process, simple technique and obvious economic benefit.
Description
[technical field] the present invention relates to a kind of dressing process for desiliconizing of bauxite, and the concentrate product that obtains with this method can be used to produce aluminium oxide.
[background technology] often requires the alumina silica ratio of bauxite to reach certain value in the commercial Application of bauxite.Especially in alumina producing, efficient low-consume, the simple bayer process of technology generally require alumina silica ratio greater than 10.For diaspore type bauxite, most alumina silica ratios are less than 10, thereby have limited the commercial Application economically and reasonably of this class bauxite.Ore dressing and desiliconizing, especially flotation desilication are one of cost-effective methods that improves the bauxite aluminium-silicon ratio.
At present, the flotation desilication of diaspore type bauxite is that bauxite is levigate behind flotation desilication, obtains qualified concentrate containing.The qualified concentrate containing that is used for alumina producing not only requires the alumina silica ratio of concentrate to meet the demands, and requires granularity of concentrate thick.At present the fineness of bauxite flotation concentrate for-0.074mm accounts for 90% even higher, is its major reason of failing to be applied to alumina producing.
Main valuable mineral diaspore in the bauxite, bigger with the nonhomogeneous hardness of main siliceous mineral such as kaolinite, illite, pyrophillite, Mohs' hardness is respectively: diaspore 6-7, kaolinite 1-3, illite 1-2, pyrophillite 1-2.Therefore, the difficult relatively comminution of diaspore makes the aluminium of size fractionated in the bauxite comminution product, the distribution of silicon have selectivity, Al
2O
3Enrichment relatively in the coarse fraction of comminution product, SiO
2Enrichment relatively in fine fraction.
Because the nature difference of bauxite mineral component, the size distribution of comminution product are the thickness polarization, are mainly diaspore and intergrowth thereof in the coarse fraction.In floatation process, coarse fraction diaspore especially its intergrowth difficulty floats, easily falls groove.In order to guarantee that granularity of concentrate is thick, have under thicker mog, take measures to strengthen coarsely graded recovery from increasing collector dosage and flotation tailing aspect such as regrind.Consequently, content of organics height in the medicine of flotation consumption height, the concentrate, technological process complexity, technical process are difficult to stablize, and the fluctuation of flotation concentrate fineness is big.
[summary of the invention] is at the comminution products characteristics and the bauxite flotation characteristics of bauxite, in the bauxite flotation process, can not reclaim coarse fraction diaspore and intergrowth thereof in order to overcome prior art timely and effectively, cause the fluctuation of flotation concentrate fineness big, content of organics height in flotation medicine consumption height, the concentrate, technological process complexity, technical process are difficult to stablize, the shortcoming that flotation operation production capacity is low, special proposition the present invention.
The present invention is achieved by the following technical solutions.
The selectivity that the present invention utilizes bauxite to exist in the comminution process by adjusting milling medium and grinding condition, is further strengthened the selectivity comminution of bauxite, to improve coarsely graded alumina silica ratio; Then selectivity comminution product is divided into slightly, fine fraction, handle respectively.Fine fraction enters the flotation flowsheet desiliconization, obtains flotation concentrate, coarse fraction directly and flotation concentrate merge into qualified concentrate containing.In the fine fraction of comminution product, the dissociating better of diaspore, floatability are better, easily reclaim in floatation process, and therefore, flotation medicine consumption is low, stable technical process, technological process are simple.The coarse fraction of comminution product does not enter flotation operation and directly as concentrate, can guarantee coarsely graded effective recovery, guarantee that granularity of concentrate is thick, does not consume floating agent again, and can improve the disposal ability of flotation operation.
The present invention includes technical process such as grinde ore, classification, flotation, bauxite is carried out classification after levigate, tell two ranks of coarse fraction and fine fraction, coarse fraction is a concentrate 1, fine fraction adds floating agent and carries out flotation, the flotation concentrate that obtains is a concentrate 2, and concentrate 1 and concentrate 2 are merged into the ore concentration of bauxite concentrate.
The levigate method of bauxite can be one or more the selectivity comminutions that carry out in small, broken bits, ball milling, rod milling, special-shaped medium ore grinding, gravel mill, autogenous grinding, the method such as Semi-Autogenous, and the fineness that comminution requires to reach is decided on the alternative comminution character of alum clay sample ore.
Bauxite after selectivity is levigate carries out classification, stage division can be heavily leave the theatre, centrifugal force field or screening, tell two ranks of coarse fraction and fine fraction, the granularity boundary line of classification is 0.074mm, or decides on coarsely graded alumina silica ratio.
Utilize the present invention can reclaim coarse fraction and fine fraction valuable mineral timely and effectively, guarantee the flotation concentrate coarse size, produce the flotation concentrate that is fit to alumina producing Bayer process, reduce content of organics in flotation medicine consumption height and the concentrate, simplify technological process, the steady production process, a kind of new dressing process for desiliconizing bauxite of raising flotation operation production capacity.The present invention has guaranteed that the concentrate fineness is coarser than the fineness in comminution ore deposit, makes the collecting agent medicine depletion of flotation operation few more than 30%, and the disposal ability of flotation operation improves 30%-50%.It is effective that aluminium silicon separates, and production process is easily stable, and technology is simple, remarkable in economical benefits.
[specific embodiment]
Below in conjunction with embodiment method of the present invention is described further.
Embodiment 1
Raw material: the comprehensive sample ore 1 in Henan bauxite district, its main chemical compositions is (%)
| Al 2O 3 | SiO 2 | Fe 2O 3 | Alumina silica ratio |
| 64.69 | 11.39 | 4.93 | 5.68 |
Milling medium: steel ball.
Flow process is: ore grinding to fineness accounts for 75% for-0.074mm, adopts the 0.074mm sieve classification, and-0.074mm grade is carried out flotation, obtains concentrate 2, and+0.074mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
The medicament that the fine fraction flotation is adopted: wherein a kind of of oxidation paraffin wax soap, tall oil, aliphatic acid and soap class and derivative etc. or several are made collecting agent, and wherein a kind of such as sodium carbonate, NaOH, polyphosphate, waterglass, small organic molecule or several adjust agent.
The flow process that the fine fraction flotation is adopted is: one roughing, once purging selection, twice selected back output flotation concentrate, the closed circuit flow process that chats returns in proper order.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 8.32 13.11 11.13 | 27.73 62.42 90.15 | 70.03 | 75 |
Embodiment 2
Other condition is with embodiment 1.
Milling medium: rod iron.
Flow process is: ore grinding to fineness accounts for 65% for-0.074mm, adopts the 0.074mm sieve classification, and-0.074mm grade is carried out flotation, obtains concentrate 2, and+0.074mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
The flow process that the fine fraction flotation is adopted is: one roughing, the standard-sized sheet road flow process of twice selected back output flotation concentrate.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 8.86 13.72 11.05 | 39.17 50.25 89.42 | 57.92 | 65 |
Embodiment 3
Other condition is with embodiment 1.
Milling medium: rod iron.
Flow process is: ore grinding to fineness accounts for 72% for-0.074mm, adopts the 0.074mm sieve classification, and-0.074mm grade is carried out flotation, obtains concentrate 2, and+0.074mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
The flow process that the fine fraction flotation is adopted is: one roughing, twice selected back output flotation concentrate, once purging selection is scanned foam and is returned in proper order, cleaner tailings with scan the flow process that mine tailing is merged into true tailings.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 8.51 13.76 11.26 | 32.47 57.30 89.77 | 66.37 | 72 |
Embodiment 4
Other condition is with embodiment 3.
Mog accounts for 76% for-0.074mm.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 8.44 13.51 11.41 | 27.59 62.43 90.02 | 71.01 | 76 |
Embodiment 5
Other condition is with embodiment 3.
Milling medium: short rod iron.
Flow process is: ore grinding to fineness accounts for 80% for-0.074mm, adopts the 0.074mm sieve classification, and-0.074mm grade is carried out flotation, obtains concentrate 2, and+0.0.074mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 9.11 13.53 12.04 | 23.05 67.39 90.44 | 75.85 | 80 |
Embodiment 6
Other condition is with embodiment 3.
Raw material: the comprehensive sample ore 2 in Henan bauxite district, its main chemical compositions is (%)
| Al 2O 3 | SiO 2 | Fe 2O 3 | Alumina silica ratio |
| 62.92 | 10.34 | 7.04 | 6.09 |
Milling medium: post ball.
Flow process is: ore grinding to fineness accounts for 55% for-0.074mm, adopts the 0.10mm sieve classification, and-0.10mm grade is carried out flotation, obtains concentrate 2, and+0.10mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
The flow process that the fine fraction flotation is adopted is: one roughing, twice selected back output flotation concentrate, once purging selection is scanned foam and is returned in proper order, the cleaner tailings classification, coarse fraction is incorporated flotation concentrate into, fine fraction with scan the flow process that mine tailing is merged into true tailings.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 8.81 12.55 11.73 | 14.65 74.67 89.32 | 44.72 | 55 |
Embodiment 7
Other condition is with embodiment 6.
Milling medium: short rod iron.
Flow process is: ore grinding to fineness accounts for 75% for-0.074mm, adopts classification of sedimentation, and fine fraction carries out flotation, obtains concentrate 2, and coarse fraction is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 9.14 15.42 12.59 | 29.14 60.13 89.27 | 69.55 | 75 |
Embodiment 8
Other condition is with embodiment 7.
Milling medium: steel ball.
Flow process is: ore grinding to fineness accounts for 79% for-0.074mm, adopts the 0.074mm sieve classification, and-0.074mm grade is carried out flotation, obtains concentrate 2, and+0.074mm grade is a concentrate 1, and concentrate 1 is merged into qualified concentrate containing with concentrate 2.
The flow process that the fine fraction flotation is adopted is: one roughing, the standard-sized sheet road flow process of twice selected back output flotation concentrate.
Ore dressing and desiliconizing the results are shown in following table:
| Name of product | Concentrate alumina silica ratio (A/S) | Concentrate Al 2O 3The rate of recovery (%) | The concentrate fineness (0.074mm%) | Mog (0.074mm%) |
| Concentrate 1 concentrate 2 merges concentrate | 6.62 15.48 11.73 | 20.87 66.50 87.36 | 74.04 | 79 |
Claims (3)
1. the dressing process for desiliconizing of a bauxite, comprise grinde ore, classification, flotation, it is characterized in that: bauxite is carried out classification after levigate, be divided into two ranks of coarse fraction and fine fraction, coarse fraction is a concentrate 1, fine fraction adds floating agent and carries out flotation, and the flotation concentrate that obtains is a concentrate 2, and concentrate 1 and concentrate 2 are merged into the ore concentration of bauxite concentrate.
2. dressing process for desiliconizing according to claim 1, it is characterized in that: the levigate method of bauxite can be that the fineness that comminution requires to reach is decided on the alternative comminution character of alum clay sample ore with one or more the selectivity comminutions that carry out in small, broken bits, ball milling, rod milling, special-shaped medium ore grinding, gravel mill, autogenous grinding, the method such as Semi-Autogenous.
3. dressing process for desiliconizing according to claim 1, it is characterized in that: bauxite is carried out classification after levigate, tell two ranks of coarse fraction and fine fraction, stage division can be heavily leave the theatre, centrifugal force field or screening, the granularity boundary line of classification is 0.074mm, or decides on coarsely graded alumina silica ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114525 CN1128022C (en) | 2001-06-04 | 2001-06-04 | Ore dressing and desiliconizing process of bauxite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114525 CN1128022C (en) | 2001-06-04 | 2001-06-04 | Ore dressing and desiliconizing process of bauxite |
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|---|---|
| CN1389300A CN1389300A (en) | 2003-01-08 |
| CN1128022C true CN1128022C (en) | 2003-11-19 |
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|---|---|---|---|
| CN 01114525 Expired - Fee Related CN1128022C (en) | 2001-06-04 | 2001-06-04 | Ore dressing and desiliconizing process of bauxite |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366346C (en) * | 2005-11-28 | 2008-02-06 | 中国铝业股份有限公司 | Bauxite separating method |
| CN100398217C (en) * | 2006-07-06 | 2008-07-02 | 中国铝业股份有限公司 | Flotation desilication method for bauxite |
| CN100398216C (en) * | 2006-07-06 | 2008-07-02 | 中国铝业股份有限公司 | Method of flotation desulfur desilicon in bauxite |
| CN100571879C (en) * | 2007-12-17 | 2009-12-23 | 中国铝业股份有限公司 | A kind of dressing process for desiliconizing of mixed type bauxite |
| CN101857256B (en) * | 2009-04-13 | 2012-04-25 | 中国科学院过程工程研究所 | Method for removing silicon dioxide from low-grade diasporite type bauxite |
| CN104174484A (en) * | 2014-07-14 | 2014-12-03 | 高旭 | Desiliconization processing method for bauxite flotation tailings |
| CN106964479B (en) * | 2017-04-10 | 2019-01-15 | 中国铝业股份有限公司 | A kind of bauxite stage flotation desilication method |
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