CN100398217C - Flotation desilication method for bauxite - Google Patents
Flotation desilication method for bauxite Download PDFInfo
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- CN100398217C CN100398217C CNB2006100987042A CN200610098704A CN100398217C CN 100398217 C CN100398217 C CN 100398217C CN B2006100987042 A CNB2006100987042 A CN B2006100987042A CN 200610098704 A CN200610098704 A CN 200610098704A CN 100398217 C CN100398217 C CN 100398217C
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005188 flotation Methods 0.000 title claims abstract description 41
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 31
- 239000012141 concentrate Substances 0.000 claims abstract description 22
- 238000000227 grinding Methods 0.000 claims abstract description 17
- 239000006260 foam Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000007667 floating Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007127 saponification reaction Methods 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [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 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000011362 coarse particle Substances 0.000 abstract 4
- 239000010419 fine particle Substances 0.000 abstract 3
- 239000008396 flotation agent Substances 0.000 abstract 2
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 25
- 238000005516 engineering process Methods 0.000 description 13
- 238000003801 milling Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910001648 diaspore Inorganic materials 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000004131 Bayer process Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 235000021357 Behenic acid Nutrition 0.000 description 1
- 206010009866 Cold sweat Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004558 technical concentrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention discloses a flotation desilication method for bauxite, which comprises the following steps of grinding, grading and flotation. Under a condition that the grinding fineness of-0.074mm accounts for 30% to 95%, fine particle size products and coarse particle size products are obtained by grading in advance. The fine particle size products act with a flotation agent to directly enter a technological process of flotation and produce concentrating foam. The coarse particle size products are reground to act with the flotation agent and enter a concentrating process and coarse particle regrinding products are combined with the flotation foam products of fine particle size to carry out concentration and obtain final concentrate. Concentrating bottom flow returns in sequence and scavenging bottom flow becomes final tailings. The present invention realizes coarse particle quick flotation and ensures the grade and the recovery rate of ore concentrate. A resource utilization rate is greatly improved and the economic benefits are obvious.
Description
Technical field
The present invention relates to a kind of flotation desilication method for bauxite.
Background technology
China's bauxite reserves are abundant, but great majority be in low-grade diaspore type bauxite, can not directly apply in the low bayer process of production cost, need improve its alumina silica ratio through ore dressing and desiliconizing.Flotation desilication is effective and the most economic method.
At present, the direct-flotation desiliconisation technology and the technology of bauxite are more, a kind of is closed circuit floatation process, with bauxite levigate after, add floating agent, roughly select respectively, selected and scan, selected foam final concentrate, scanning mine tailing is true tailings, and selected underflow returns and roughly selects, scans foam and returns the flow process of roughly selecting, and two kinds of distortion in addition of this kind technology are exactly that (1) carries out classification with selected underflow, coarse fraction and flotation concentrate are merged into final concentrate, and fine fraction and flotation tailing are merged into true tailings; (2) scan underflow and carry out classification, coarse fraction returns ball mill and carries out regrinding and reconcentration, and fine fraction is a true tailings; Another kind is " selective milling---a poly-group floatation process ", by selective milling bauxite is classified into two kinds of products of thickness, coarse fraction is directly as concentrate, and fine fraction enters closed circuit floatation process, coarse-grain coarse ore concentrate and flotation concentrate are merged into final concentrate, and flotation tailing is a true tailings; Also having a kind of technology is exactly " selective milling-coarse and fine separation " technology.It is characterized in that under the corase grind condition, will grind the back Mineral Classification and obtain two grade products of thickness, to thick, fine fraction product difference flotation desilication.
Because bauxite material phase component nature difference, the size distribution of comminution product presents the polarization of coarse grain particulate, middle grade product is less relatively, and coarse fraction is mainly diaspore and rich intergrowth thereof, in floatation process, coarsely graded diaspore mineral and rich intergrowth thereof are difficult to come-up, and-10 microns grain size contents are relatively also very many in the fine fraction product, not only seriously disturb floatation process, a large amount of simultaneously absorption consume floating agent, cause the shortcoming that flotation recovery rate is low, dosing is big.
More than each technological process its characteristics are respectively arranged, the key problem in technology that solves all is embodied on the processing mode of the thickness grade behind the bauxite Milling, coarse grain is directly as concentrate, output is big, grade is on the low side and the fluctuation obvious, flotation operation concentration is low, foam is clamminess, difficulty is broken, and dispersant dosage is big, and fine fraction is big to the floatation process influence.In the flotation process of full cut-off road, bauxite needs fine grinding, and energy consumption height, production capacity are little, coarse grain come-up difficulty, and technic index is relatively poor.For concentrate classification flow process again, technological process is complicated a little; Coarse grain, particulate carry out the technological process complexity of flotation respectively.
Summary of the invention
In the purpose of the present invention at prior art exist in higher relatively, difficult floating, the characteristics that particulate disturbs flotation of the thickness polarization in comminution technology of low-grade bauxite, coarse grain grade, in order to overcome existing technological process, technical concentrate grade, rate of recovery fluctuation greatly, shortcomings such as flotation process is long, technical process is difficult to stablize, the flotation operation production capacity is low provide a kind of and can effectively guarantee to obtain fast the concentrate of high-grade high-recovery, can improve the coarsely graded flotation desilication method for bauxite of processing of the production capacity of system equipment again.
The objective of the invention is to be achieved through the following technical solutions.
A kind of flotation desilication method for bauxite, comprise ore grinding, classification and floatation process, it is characterized in that: at mog be-when 0.074mm accounts for 30%-95%, through pre-classification, obtain fine fraction product and coarse fraction product, the fine fraction product is through directly entering flotation process with the floating agent effect, the selected foam of output; The coarse fraction product is through regrinding, with feed selected operation after the floating agent effect, promptly regrind product and fine fraction flotation froth product of coarse grain enters selected operation simultaneously, obtains final concentrate through after the flotation, selected underflow returns in proper order, and scanning underflow becomes true tailings.
The dressing process for desiliconizing of a kind of bauxite of the present invention is characterized in that: the collecting agent of floating agent is the aliphatic acid of saponification and alkyl hydroximic acid, the mixed compound of aphthenic acids; It is sodium carbonate that the pH value is adjusted agent, and dispersant is a calgon.
The dressing process for desiliconizing of a kind of bauxite of the present invention is characterized in that: the short circuit of coarse fraction product enters selected operation and handles; The employing of fine fraction product is roughly selected once or twice, scans once or twice and selected once or twice floatation process is handled.
Method of the present invention is to have adopted the technological process of " ore grinding-classification-coarse grain regrind quick selected particulate roughly select ", nature difference according to the mineral composition of bauxite, the characteristics that have selective milling, by adjusting milling medium and grinding process condition, strengthen the selective milling of bauxite, and the grade of improving bauxite distributes the fine fraction content and relative more coarsely graded content of minimizing bauxite, the content of increase intermediate product grade.
The sodium carbonate that in ball mill, adds 2000-5000 gram/ton raw ore, the primary grinding product fineness accounts for 30%-95% for-0.074mm, ore milling concentration 30%-75%, overflow concentration in classifier 20%-65%, pass through pre-classification then, the fine fraction product is told and the floating agent effect, enter flotation process then, roughly select foam again through selected once or twice, roughly select underflow again through scanning once or twice, each operation foam flows toward selected direction successively, and underflow flows toward scanning direction successively, and the underflow of scanning at last becomes true tailings; Relative thicker coarse fraction product, further enter two sections open-circuit grinding technologies, the distribution of the proportioning by adjusting milling medium kind, milling medium, the front and back water of ball mill improves grinding efficiency and improves grinding particle size and distributes, obtain the secondary grinding product of release mesh, the ore milling product fineness accounts for 40%-95% for-0.074mm, then with the floating agent effect, enter selected operation by pump or self-priming, froth pulp merging with fine-graded selected one or selected two is carried out selected, flotation froth becomes final concentrate, and selected underflow returns in proper order.
The present invention adopts stage grinding technology, has both prevented the overground of bauxite, influences floatation process and index, makes the abundant monomer cleavage of coarse fraction bauxite be convenient to flotation again and reclaims.Therefore, the technological process of " ore grinding-classification-coarse grain regrind quick selected particulate roughly select " had both been reclaimed the bauxite coarse-grain coarse ore concentrate effectively fast, had been guaranteed the grade of concentrate simultaneously; Moreover the quick dressing process of coarse grain has shortened flow process, has improved the device processes ability, thereby has reduced production costs, and flotation concentrate can satisfy the requirement of alumina producing Bayer process technology to raw material.This technology is applicable to the direct-flotation desiliconisation technology of all bauxite, obtains the concentrate of high-grade high-recovery, technological process good stability, workable, and remarkable in economical benefits, application prospect is extensive.
Description of drawings
Accompanying drawing is the process chart of method of the present invention.
The specific embodiment
A kind of flotation desilication method for bauxite, comprise ore grinding, classification and floatation process, at mog be-when 0.074mm accounts for 30%-95%, through pre-classification, obtain fine fraction product and coarse fraction product, the fine fraction product is through directly entering flotation process with the floating agent effect, the selected foam of output; The coarse fraction product is through regrinding, with feed selected operation after the floating agent effect, promptly regrind product and fine fraction flotation froth product of coarse grain enters selected operation simultaneously, obtains final concentrate through after the flotation, selected underflow returns in proper order, and scanning underflow becomes true tailings.Raw ore through one section closed circuit grinding classification after, enter two sections pre-classifications, the fine fraction that obtains is roughly selected froth pulp and is entered selected I operation through entering and roughly select operation in agitator with after the floating agent effect, the gained froth pulp enters selected II operation, and foam is as final concentrate; The coarse fraction chats of two sections pre-classifications through two sections open-circuit grindings after, in the 2# agitator with the floating agent effect after, short circuit directly enters selected II operation, selected underflow returns in proper order; After underflow after roughly selecting was scanned through twice, underflow was scanned foam and is returned in proper order as true tailings.
The present invention is further illustrated below in conjunction with example.
With the comprehensive sample of Shanxi Jin Nan low-grade bauxite commerical test, its thing phase composition and chemical constituent see the following form 1 and table 2 respectively:
The phase composition of the comprehensive sample thing of table 1 Shanxi Jin Nan low-grade bauxite commerical test
Milling medium: steel ball
Classifying equipoment: spiral classifier
The principle technological process accompanying drawing 1 of this working of an invention.Behind one section closed circuit grinding, overflow fineness-0.074mm accounts for 66.87%, and through two sections submerged spiral classifiers, overflow fineness-0.074mm accounts for 95.32%, through with the floating agent effect after enter the closed circuit floatation process that thick two essences two are swept; The sand return of two sections classifications enters two sections open-circuit grindings, its mog accounts for 76.29%, enters selected two operations by self-priming after ore discharge and the medicament effect, with a selected operation foams mix flotation for-0.074mm, obtain final concentrate, scanning two underflow is true tailings.
The medicament that floatation process adopts is: mix the compound that obtain with alkyl hydroximic acid, aphthenic acids according to 90: 2: 8 ratio with the acid of the behenic acid after the saponification and do collecting agent, consumption 1100 gram/ton raw ores, adjust pH value to 9.5 with sodium carbonate, dispersant is a calgon, and consumption is 60 gram/ton raw ores.
Its ore dressing and desiliconizing the results are shown in following table:
Claims (3)
1. flotation desilication method for bauxite, comprise ore grinding, classification and floatation process, it is characterized in that: at mog be-when 0.074mm accounts for 30%-95%, through pre-classification, obtain fine fraction product and coarse fraction product, the fine fraction product is through directly entering flotation process with the floating agent effect, the selected foam of output; The coarse fraction product is through regrinding, with feed selected operation after the floating agent effect, promptly regrind product and fine fraction flotation froth product of coarse grain enters selected operation simultaneously, obtains final concentrate through after the flotation, selected underflow returns in proper order, and scanning underflow becomes true tailings.
2. the dressing process for desiliconizing of a kind of bauxite according to claim 1 is characterized in that: the collecting agent of floating agent is the mixed compound of the aliphatic acid of saponification and alkyl hydroximic acid, aphthenic acids; It is sodium carbonate that the pH value is adjusted agent, and dispersant is a calgon.
3. the dressing process for desiliconizing of a kind of bauxite according to claim 1 is characterized in that: the short circuit of coarse fraction product enters selected operation and handles; The employing of fine fraction product is roughly selected once or twice, scans once or twice and selected once or twice floatation process is handled.
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| CNB2006100987042A CN100398217C (en) | 2006-07-06 | 2006-07-06 | Flotation desilication method for bauxite |
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| CNB2006100987042A CN100398217C (en) | 2006-07-06 | 2006-07-06 | Flotation desilication method for bauxite |
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| CN1883815A CN1883815A (en) | 2006-12-27 |
| CN100398217C true CN100398217C (en) | 2008-07-02 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478077C (en) * | 2007-05-31 | 2009-04-15 | 中国铝业股份有限公司 | Mine milling method for improving particles size distribution of bauxite mine milling products |
| 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 |
| CN102527501A (en) * | 2010-12-07 | 2012-07-04 | 中铝国际技术发展有限公司 | Configuration method for bauxite ore processing grinding-flotation workshop |
| CN102120196A (en) * | 2010-12-30 | 2011-07-13 | 中国铝业股份有限公司 | Method for adding collecting agent in process of floating bauxite |
| CN103521363B (en) * | 2013-10-19 | 2016-06-22 | 李耀吾 | Low-grade bauxite raw ore open-circuit grinding ore-dressing technique |
| CN104028386A (en) * | 2014-06-05 | 2014-09-10 | 鞍钢集团矿业公司 | Direct flotation collector for sorting fine-fraction low-grade hematite in softened water medium |
| CN104841567A (en) * | 2015-06-08 | 2015-08-19 | 河南东大矿业股份有限公司 | Flow mixing method for bauxite forward flotation |
| 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 |
| CN106076654B (en) * | 2016-06-29 | 2019-02-05 | 昆明理工大学 | A kind of microemulsion collecting agent |
| CN106076655B (en) * | 2016-06-30 | 2018-06-15 | 福州大学 | A kind of trapping agent for bauxite flotation and preparation method thereof |
| 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 |
| CN110302893B (en) * | 2019-05-29 | 2024-09-27 | 河南东大科技股份有限公司 | Flotation method for producing bauxite concentrate by using ultra-low grade raw ore |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1092142A1 (en) * | 1982-10-15 | 1984-05-15 | Уральский ордена Трудового Красного Знамени политехнический институт им.С.М.Кирова | Process for processing bauxites |
| CN86107769A (en) * | 1986-11-13 | 1988-05-25 | 范昌海 | Valuable mineral selective milling and stage grading process |
| CN1324696A (en) * | 2000-05-19 | 2001-12-05 | 中南工业大学 | Bauxite dressing method |
| CN1389300A (en) * | 2001-06-04 | 2003-01-08 | 中南大学 | Ore dressing and desiliconizing process of bauxite |
| CN1403205A (en) * | 2001-09-11 | 2003-03-19 | 北京矿冶研究总院 | Bauxite dressing method |
-
2006
- 2006-07-06 CN CNB2006100987042A patent/CN100398217C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1092142A1 (en) * | 1982-10-15 | 1984-05-15 | Уральский ордена Трудового Красного Знамени политехнический институт им.С.М.Кирова | Process for processing bauxites |
| CN86107769A (en) * | 1986-11-13 | 1988-05-25 | 范昌海 | Valuable mineral selective milling and stage grading process |
| CN1324696A (en) * | 2000-05-19 | 2001-12-05 | 中南工业大学 | Bauxite dressing method |
| CN1389300A (en) * | 2001-06-04 | 2003-01-08 | 中南大学 | Ore dressing and desiliconizing process of bauxite |
| CN1403205A (en) * | 2001-09-11 | 2003-03-19 | 北京矿冶研究总院 | Bauxite dressing method |
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