CN102935404B - Method for performing dry classification enrichment on V2O5 from vanadium-containing mineral - Google Patents
Method for performing dry classification enrichment on V2O5 from vanadium-containing mineral Download PDFInfo
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- CN102935404B CN102935404B CN201210493928.9A CN201210493928A CN102935404B CN 102935404 B CN102935404 B CN 102935404B CN 201210493928 A CN201210493928 A CN 201210493928A CN 102935404 B CN102935404 B CN 102935404B
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Abstract
The invention discloses a method for performing dry classification enrichment on V2O5 from vanadium-containing mineral. The method comprises the following steps of: roughly crushing the vanadium-containing mineral, and screening and removing coarse particle minerals, so that the vanadium grade is preliminarily enriched; performing fine grinding on the mineral particles, performing dry airflow classification on the finely ground fine powder, removing partial gangue with low vanadium content, and collecting fine particle grade materials which are subjected to airflow classification, thus obtaining vanadium-containing concentrate with enriched V2O5. According to the method, due to two-step tailings removal enrichment, the subsequent mineral treatment capacity is reduced, and the vanadium grade is improved; and moreover, the method is simple in process flow, convenient to operate, green and environment-friendly and has wide application prospects.
Description
Technical field
The invention belongs to ore dressing and the metallurgical technology field of rare metal in field of metallurgy, particularly relating to a kind of from containing enrichment V vanadium mineral
2o
5method.
Background technology
Vanadium is a kind of rare refractory metal, is a kind of very important strategic resource.At present, the vanadium of more than 85% is used to steel and iron industry in the world; About 7% is used to produce other alloy, as aluminum-vanadium alloy, titanium vanadium alloy; Separately have 7% to be used to chemical industry and ceramic industry, Chang Zuowei produces the raw material of effective catalyst, catalyzer contact agent.The application of vanadium is also constantly being expanded, in aerospace industry, nuclear industry, bio-pharmaceuticals and vanadium cell etc., have new application.
Rock coal containing alum is a kind of distinctive navajoite resource of China, and its reserves are huge, but the grade of stone coal vanadium-containing height is not etc., the stone coal vanadium-containing grade major part of China each department between 0.1% ~ 1.0%, grade be greater than 1% then less.In China's bone coal, the grade of vanadium is lower, and non-patent literature " extracting vanadium from stone coal progress and V
2o
5market situation " record in (guest's intelligence brave, " Hunan's nonferrous metals " 01 phase in 2006, P16 ~ 20): bone coal navajoite adopts the method for traditional ore dressing not give enrichment, and China's extracting vanadium from stone coal industry also has no beneficiation enrichment precedent.But recently also there is a small amount of document to propose the method for bone coal ore dressing, claim mineral to be milled to 200 orders in Chinese patent literature " a kind of beneficiation method of Rock coal containing alum " (publication number CN1864860A), make ore pulp, select containing vanadium concentrate with the fine graded machine of wet type; The method vanadium recovery is lower, and silicalite coal industry field generally adopts roasting technique process, and gained concentrate also needs increase by one section of baking operation, significantly improves investment and produce to rise this.Non-patent literature " vanadium in the stone coal mine of beneficiation enrichment Aksu " is (to equality, " investigation of materials and application " 01 phase in 2010, P65 ~ 69) middle record: adopt wet type screening throwing tail or wet type to screen method for floating Vanadium Concentrationin again, the method is also wet processed, flotation circuit need be founded the factory specially, drop into huge, be difficult to equally be applicable to silicalite colliery.
Extracting vanadium from stone coal industry all faces the immense pressure reducing production cost.Extracting vanadium from stone coal project cost is high mainly because the grade containing vanadium mineral is too low, cause that investment is large, environmental protection cost is high, treating capacity and energy resource consumption large.When production cost is difficult to effectively control, searching is in conjunction with process for extracting vanadium and the beneficiation enrichment technology of environmental protection becomes new developing direction.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, provide a kind of small investment, energy consumption low, pollute less, simple to operate and be suitable for industrial applications from containing dry classification enrichment V vanadium mineral
2o
5method.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of from containing dry classification enrichment V vanadium mineral
2o
5method, comprise the following steps:
(1) slightly break: first slightly break containing vanadium mineral, part coarse granule mineral are removed in screening, make the vanadium grade in mineral obtain preliminary concentration; The described equipment slightly breaking once Cheng Youxuan employing is jaw crusher and gyratory crusher, and first carries out fragmentation by jaw crusher, then carries out fragmentation by gyratory crusher;
(2) fine grinding: fine grinding is carried out to the mineral grain after above-mentioned steps (1) process; The equipment that described fine grinding process preferably adopts is rod mill or ball mill;
(3) air current classifying: carry out dry method air current classifying to the powder material after above-mentioned steps (2) process, is separated powder material further by controlling air-flow velocity, and collects the fine particle stage material after air current classifying, obtain enrichment V
2o
5after containing vanadium product.
Above-mentioned from containing dry classification enrichment V vanadium mineral
2o
5method, described is siliceous lithotype navajoite stone containing vanadium mineral, is wherein preferably 1% ~ 25%, containing V containing C mass fraction
2o
5grade is preferably greater than 0.5%.Our research shows, the siliceous each component mineral physics performance containing vanadium shale of part is variant, and gangue phase hardness is large, and density is large, containing V
2o
5low; Silicon phase hardness is little, and density is little, containing V
2o
5height, visible, when processing this type of containing vanadium mineral, be specially adapted to enrichment method of the present invention.
Above-mentioned from containing dry classification enrichment V vanadium mineral
2o
5method, in described step (1), described coarse granule mineral preferably refer to that granularity is greater than the mineral of 5mm; Described slightly break after, preferably control the mineral quantity > 80% of thick broken rear mineral grain granularity-5mm.
Above-mentioned from containing dry classification enrichment V vanadium mineral
2o
5method, in described step (1), preferably adopt rotary screen to sieve, the quality of the coarse granule mineral that screening is removed preferably accounts for described containing 10% ~ 30% of vanadium mineral (i.e. raw ore) quality.
Above-mentioned from containing dry classification enrichment V vanadium mineral
2o
5method, after described fine grinding completes, preferably control the inventory > 85% of powder material granularity-0.15mm after fine grinding, described fine particle stage material refers to that granularity is less than the mineral aggregate of 0.15mm.
Above-mentioned from containing dry classification enrichment V vanadium mineral
2o
5method, in described step (3), the throwing tail amount of air current classifying process preferably accounts for 5% ~ 15% of powder material quality before classification.
Compared with prior art, the invention has the advantages that:
(1) the present invention adopts in the mineral slightly broken method with carrying out two steps throwing tails during fine grinding, improves vanadium grade, original Process ba-sis does not increase investment substantially;
(2) this method whole process adopts dry classification, can accept follow-up calcination process smoothly; Not only technological process is simple, energy-saving and cost-reducing, and process operation is convenient, environmental protection.
Accompanying drawing explanation
Fig. 1 is the process chart of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
embodiment 1:
Certain District, Hunan bone coal navajoite, raw ore chemical composition mainly comprises C 15.00%, SiO
258.46%, Al
2o
38.72%, V
2o
51.00%, adopt method of the present invention to process this siliceous lithotype bone coal navajoite, specifically comprise the following steps (technological process is see Fig. 1):
1. slightly break: adopt jaw crusher and gyratory crusher slightly to break successively the bone coal navajoite of the present embodiment, discharging-material size scope is controlled at about 5.00mm by spindle breaker discharge port, 5.00mm rotary screen is adopted to sieve the mineral after slightly broken again, on sieve, coarse granule mineral quality is 17.40% of ore quality, and sample analysis is containing V
2o
5be 0.23%; Sieve is lower is ore quality 82.60%, and sample analysis is containing V
2o
5be 1.16%.Ore handling capacity reduces by 17.40%, and vanadium loss 4.00%, vanadium grade improves 16.00%.
2. fine grinding: the mineral grain lower than 5.00mm that step 1 is obtained enters ball mill fine grinding, and get the mesh screen that 0.15mm crossed by the powder material sample after fine grinding, recording the mineral quantity of sieving is 93.40%, now stops fine grinding.
3. dry method air current classifying: the powder material after step (2) fine grinding is sent into gas flow sizing machine, by regulating wind-force size to control classification amount, meal outlet collecting amount is 9.70% of charging total amount, and sample analysis is containing V
2o
5be 0.42%, the fine particle stage material collecting amount of fine powder outlet (being less than 0.15mm) is 90.30% of charging total amount, and sample analysis is containing V
2o
5be 1.24%.
Throw tail by slightly broken with fine grinding two step, ore handling capacity reduces 25.20% altogether, and vanadium total losses is 7.37%, and vanadium grade improves 24.00%, is increased to 1.24% from raw ore containing vanadium 1.00%.
embodiment 2:
Somewhere, northwest bone coal navajoite, raw ore chemical composition mainly comprises C 2.25%, SiO
259.41%, Al
2o
310.40%, V
2o
50.72%, adopt method of the present invention to process this siliceous lithotype bone coal navajoite, specifically comprise the following steps:
1. slightly break: adopt jaw crusher and gyratory crusher slightly to break successively the bone coal navajoite of the present embodiment, discharging-material size scope is controlled at about 5.00mm by spindle breaker discharge port, 5.00mm rotary screen is adopted to sieve the mineral after slightly broken again, on sieve, coarse granule mineral quality is 15.70% of ore quality, and sample analysis is containing V
2o
5be 0.27%; Sieve is lower is ore quality 84.30%, and sample analysis is containing V
2o
5be 0.81%.Ore handling capacity reduces by 11.70%, and vanadium loss 4.24%, vanadium grade improves 11.70%.
2. fine grinding: the mineral grain lower than 5.00mm that step 1 is obtained enters rod mill fine grinding, and get the mesh screen that 0.15mm crossed by the powder material sample after fine grinding, recording the mineral quantity of sieving is 94.50%, now stops fine grinding.
3. dry method air current classifying: the fine granular materials after step (2) fine grinding is sent into gas flow sizing machine, by regulating wind-force size to control classification amount, meal outlet collecting amount is 9.20% of charging total amount, and sample analysis is containing V
2o
5be 0.29%, the fine particle stage material collecting amount of fine powder outlet (being less than 0.15mm) is 90.80% of charging total amount, and sample analysis is containing V
2o
5be 0.86%.
Throw tail by slightly broken with fine grinding two step, ore handling capacity reduces 23.46% altogether, and vanadium total losses is 9.00%, and vanadium grade improves 18.90%, is increased to 0.86% from raw ore containing vanadium 0.72%.
Claims (4)
1. one kind from containing dry classification enrichment V vanadium mineral
2o
5method, comprise the following steps:
(1) slightly break: first slightly break containing vanadium mineral, coarse granule mineral are removed in screening; Described coarse granule mineral refer to that granularity is greater than the mineral of 5mm; Described slightly break after, control the mineral quantity > 80% that thick broken rear mineral grain granularity is less than 5mm;
(2) fine grinding: fine grinding is carried out to the mineral grain after above-mentioned steps (1) process; Carry out screening after fine grinding completes and remove coarse granule, after controlling fine grinding, the granularity of powder material is less than the inventory > 85% of 0.15mm;
(3) air current classifying: dry method air current classifying is carried out to the powder material after above-mentioned steps (2) process, powder material is separated further by controlling air-flow velocity, and collect the fine particle stage material after air current classifying, fine particle stage material refers to that granularity is less than the mineral aggregate of 0.15mm, the throwing tail amount of air current classifying process accounts for 5% ~ 15% of powder material quality before classification, obtains enrichment V
2o
5after containing vanadium concentrate;
Described is siliceous lithotype navajoite stone containing vanadium mineral, and wherein containing C mass fraction is 1% ~ 25%, containing V
2o
5grade > 0.5%.
2. according to claim 1 from containing dry classification enrichment V vanadium mineral
2o
5method, it is characterized in that: in described step (1), adopt rotary screen to sieve, the quality of coarse granule mineral that screening is removed accounts for 10% ~ 20% of described siliceous lithotype navajoite stone quality.
3. according to claim 1 and 2 from containing dry classification enrichment V vanadium mineral
2o
5method, it is characterized in that: the described equipment slightly breaking once Cheng Xuanyong is jaw crusher and gyratory crusher.
4. according to claim 1 and 2 from containing dry classification enrichment V vanadium mineral
2o
5method, it is characterized in that: the equipment that described fine grinding process is selected is rod mill or ball mill.
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| CN201210493928.9A CN102935404B (en) | 2012-11-28 | 2012-11-28 | Method for performing dry classification enrichment on V2O5 from vanadium-containing mineral |
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| CN201210493928.9A CN102935404B (en) | 2012-11-28 | 2012-11-28 | Method for performing dry classification enrichment on V2O5 from vanadium-containing mineral |
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| CN102935404B true CN102935404B (en) | 2015-05-20 |
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| CN104226454B (en) * | 2013-06-07 | 2016-10-05 | 韩国地质资源研究院 | The high-grade screening technique of book clay mineral based on case of wet attrition and classification |
| CN107913784B (en) * | 2016-10-11 | 2020-06-23 | 李冰 | Method for preparing natural ore or laterite into superfine powder |
| CN107469999B (en) * | 2017-09-19 | 2019-10-25 | 佛山科学技术学院 | A kind of grinding process and equipment of ceramic raw material |
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| AU6864687A (en) * | 1986-02-07 | 1987-08-13 | Arnold Verdun Barker | Recovery of gold and silver from ores |
| CN2191034Y (en) * | 1993-06-21 | 1995-03-08 | 李选民 | High-speed machine for crushing, grinding and winnow |
| CN1182644A (en) * | 1996-11-17 | 1998-05-27 | 郑康平 | Pneumatic separator for extracting heading breeze from metal ore |
| CN1314494C (en) * | 2005-07-26 | 2007-05-09 | 梅小军 | Wind force sorting method for classifying refined sulfur sand |
| RU2297283C1 (en) * | 2005-09-27 | 2007-04-20 | Научно-производственное республиканское унитарное предприятие "НПО "Центр" | Materials grinding apparatus |
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