CN101935755B - Two-stage leaching method for vanadium in vanadium-containing ore - Google Patents
Two-stage leaching method for vanadium in vanadium-containing ore Download PDFInfo
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- CN101935755B CN101935755B CN2010102820149A CN201010282014A CN101935755B CN 101935755 B CN101935755 B CN 101935755B CN 2010102820149 A CN2010102820149 A CN 2010102820149A CN 201010282014 A CN201010282014 A CN 201010282014A CN 101935755 B CN101935755 B CN 101935755B
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- vanadium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a two-stage leaching method for vanadium in vanadium-containing ore. The first stage comprises a step of performing normal temperature leaching on the vanadium by using hydrofluoric acid and the second stage comprises a step of performing heating leaching on the vanadium by using sulfuric acid. The leaching method has the following advantages that: 1, compared with the traditional heating acid leaching technology, the two-stage leaching technology can shorten the leaching time and reduce the energy consumption for heating; 2, compared with the leaching technology by singly using the sulfuric acid, the two-stage leaching technology for the vanadium in the vanadium-containing ore can save by 5 to 25 percent; and 3, the vanadium leaching rate in the vanadium-containing ore is over 85 percent.
Description
Technical field
The present invention relates to a kind of two sections leaching methods that contain vanadium in the navajoite stone.
Background technology
Contain the scherbinaite coal and mainly contain vanadium resource with to contain the vanadium clay be China as the independent deposit mining of vanadium.The grade that contains vanadium in the scherbinaite coal is lower, with V
2O
5Expression is generally about 1.0%.The grade that contains vanadium in the vanadium clay is omited height than the grade of vanadium in the bone coal usually, with V
2O
5Expression is generally 1.0%～3.0%.The vanadium that contains in scherbinaite coal and the clay is main with V (III), and part of V (IV) is arranged, and V (V) seldom.Because the ionic radius (74pm) of V (III) equates with the ionic radius (74pm) of Fe (II); Also very approaching with the ionic radius (64pm) of Fe (III); Therefore; V (III) is the mineral of generation itself hardly, but are present in the silicon-oxy tetrahedron structure of mineral such as containing roscoelite, kaolinite with isomorph.China was studied containing the scherbinaite coal and containing the vanadium extraction of vanadium clay since the sixties in 20th century, began industrial production the seventies, and employed technology is sodium roasting (NaCl)-water logging or acid leaching process.There are two major defects in this technology, and the one, because roasting process generates Cl
2, HCl, SO
2Mixed gas and cause environmental pollution, the 2nd, vanadium recovery is commonly 45%～55%, makes the navajoite resource about 50% can not get effectively utilizing and wasting.
For a change with replacement sodium roasting technology, the scientific worker has carried out The Study on New Technology such as the roasting of calcium method, blank roasting, wet method acid immersion.Though the roasting of calcium method has solved atmosphere polluting problem; But roasting process receives outside the ore property effect; The influence of calcination atmosphere, time, temperature and calcium salt consumption etc. is also very responsive; It is improper to control, and the silicate that forms indissoluble easily makes the part vanadium wrapped up in network by " silica ", and perhaps elements such as part vanadium in the sample ore and iron, calcium generate insoluble chemical compounds such as ferric vandate, vanadic acid calcium sodium, vanadic acid calcium.Blank roasting mainly is a problem of oxidation of wanting to solve stone coal decarbonization and low price vanadium, but roasting apparatus still is traditional shaft kiln, flat kiln and fluidizing furnace, and not only industrial scale is limited, and produces high-temp waste gas and off gas treatment problem.Wet method acid immersion technology does not need roasting, and ore can wet-milling, is fit to scale operation.Yet also there are some problems that need solve in the wet method acid immersion process for extracting vanadium.The one, for obtaining higher V
2O
5Leaching yield has to consume a large amount of H
2SO
4, H in the production
2SO
4Consumption is generally 25%～40% of ore quality, V
2O
5Leaching yield generally about 65%～75%, surpasses 80% seldom, V
2O
5The recovery generally is no more than 70%; The 2nd, operations such as the purification and impurity removal of acid leaching solution, Fe (III) reduction and the adjustment of pH value need consume a large amount of medicaments, ammoniacal liquor particularly, thus cause ammonia nitrogen sewage and handling problem.Therefore, containing the scherbinaite coal is to improve V with containing the key issue that vanadium clay acid leaching and vanadium extraction will solve
2O
5Under the prerequisite of the leaching yield and the recovery, how to reduce consuming and avoiding environmental pollution.
Summary of the invention
The purpose of this invention is to provide a kind of two sections leaching methods that contain vanadium in the navajoite stone.
The objective of the invention is to realize: a kind of two sections leaching methods that contain vanadium in the navajoite stone through following mode:
1) first section leaching: will contain broken, the wet grinding of navajoite Shi Po; Grinding fineness is that 65% above ore grain size is less than 0.15mm; The mass percent that contains navajoite stone and water in the ore pulp that ore grinding obtains is 50%～150%, and hydrofluoric acid is added in the ore pulp, carries out the leaching of vanadium under the normal temperature; The hydrofluoric acid consumption is 1%～10% with the mass percent that contains navajoite stone, extraction time 0.3h～4h;
2) second section leaching: after first section leaching accomplished, sulfuric acid is joined in the ore pulp, sulfuric acid is 5%～20% with the mass percent that contains navajoite stone, and ore pulp is heated to 65 ℃～100 ℃, carries out second section leaching of heating of vanadium, extraction time 2h～12h; After two sections leachings are accomplished, ore pulp is filtered and washs, filtrating and washings are merged into and are contained vanadium leachate.
The described navajoite stone that contains is meant V
2O
5Content is greater than 0.8% contain the scherbinaite coal or contain the vanadium clay.
The present invention has following beneficial effect: 1, adopt two sections leaching methods that the vanadium that contains in the navajoite stone is leached; First section is carried out normal temperature with hydrofluoric acid and leaches; Second section with the sulfuric acid leaching of heating; Compare with the tradition acid leaching process of heating, two sections extract technologies can shorten extraction time, reduce the energy consumption that is used to heat; 2, adopt two sections extract technologies that the vanadium that contains in the navajoite stone is leached, the technology that leaches with independent use sulfuric acid compares, and can practice thrift sulfuric acid consumption 5%～25%; 3, the leaching yield that contains vanadium in the navajoite stone can reach more than 85%.
Embodiment
Below in conjunction with specific embodiment the present invention is further specified:
Embodiment 1 contains scherbinaite colliery appearance and takes from yiyang, hunan bone coal ore deposit, V
2O
5Grade is 1.05%, gets sample ore 1000g, broken, wet grinding; Grinding fineness be 75% ore grain size less than 0.15mm, the mass percent that contains scherbinaite colliery and water in the ore pulp that ore grinding obtains is 100%, adds mass concentration and be 50% industrial hydrofluoric acid solution 80g (the hydrofluoric acid quality is 40g); After normal temperature leached 1h down, the adding mass concentration was 98% industrial sulphuric acid 125g, and ore pulp is heated to 95 ℃; Leach 4h; Ore pulp is filtered and washs, and filtrating and washings are merged into and are contained vanadium leachate, with V in the leach liquor
2O
5Quality and sample ore in V
2O
5The per-cent of quality represent leaching yield, V
2O
5Leaching yield is 91.5%.
Embodiment 2 contains vanadium clay sample ore and takes from Huaihua vanadine ore deposit, Hunan, V
2O
5Grade is 1.53%, gets sample ore 1000g, broken, wet grinding; Grinding fineness be 80% ore grain size less than 0.15mm, the mass percent that contains vanadium clay pit and water in the ore pulp that ore grinding obtains is 75%, adds mass concentration and be 50% industrial hydrofluoric acid solution 100g (the hydrofluoric acid quality is 50g); After normal temperature leached 2h down, the adding mass concentration was 98% industrial sulphuric acid 125g, and ore pulp is heated to 95 ℃; Leach 6h; Ore pulp is filtered and washs, and filtrating and washings are merged into and are contained vanadium leachate, with V in the leach liquor
2O
5Quality and sample ore in V
2O
5The per-cent of quality represent leaching yield, V
2O
5Leaching yield is 88.0%.
Embodiment 3 contains scherbinaite colliery appearance and takes from bone coal ore deposit, Quzhou, Zhejiang, V
2O
5Grade is 1.02%, gets to contain scherbinaite colliery appearance 200kg broken, wet grinding; Grinding fineness be 75% ore grain size less than 0.15mm, the mass percent that contains scherbinaite colliery and water in the ore pulp that ore grinding obtains is 125%, adds mass concentration and be 35% industrial hydrofluoric acid solution 20kg (the hydrofluoric acid quality is 7kg); After normal temperature leached 1.5h down, the adding mass concentration was 98% industrial sulphuric acid 30kg, and ore pulp is heated to 90 ℃; Leach 6h; Ore pulp is filtered and washs, and filtrating and washings are merged into and are contained vanadium leachate, with V in the leach liquor
2O
5Quality and sample ore in V
2O
5The per-cent of quality represent leaching yield, V
2O
5Leaching yield is 93.5%.
Claims (1)
1. two sections leaching methods that contain vanadium in the navajoite stone is characterized in that:
1) first section leaching: with V
2O
5Content is greater than 0.8% contain the scherbinaite coal or contain broken, the wet grinding of vanadium clay; Grinding fineness is that 65% above ore grain size is less than 0.15mm; The mass percent that contains navajoite stone and water in the ore pulp that ore grinding obtains is 50%～150%, and hydrofluoric acid is added in the ore pulp, carries out the leaching of vanadium under the normal temperature; The hydrofluoric acid consumption is 1%～10% with the mass percent that contains navajoite stone, extraction time 0.3h～4h;
2) second section leaching: after first section leaching accomplished, sulfuric acid is joined in the ore pulp, sulfuric acid is 5%～20% with the mass percent that contains navajoite stone, and ore pulp is heated to 65 ℃～100 ℃, carries out second section leaching of heating of vanadium, extraction time 2h～12h; After two sections leachings are accomplished, ore pulp is filtered and washs, filtrating and washings are merged into and are contained vanadium leachate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102820149A CN101935755B (en) | 2010-09-15 | 2010-09-15 | Two-stage leaching method for vanadium in vanadium-containing ore |
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|---|---|---|---|
| CN2010102820149A CN101935755B (en) | 2010-09-15 | 2010-09-15 | Two-stage leaching method for vanadium in vanadium-containing ore |
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|---|---|
| CN101935755A CN101935755A (en) | 2011-01-05 |
| CN101935755B true CN101935755B (en) | 2012-09-05 |
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| CN2010102820149A Expired - Fee Related CN101935755B (en) | 2010-09-15 | 2010-09-15 | Two-stage leaching method for vanadium in vanadium-containing ore |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251103A (en) * | 2011-05-27 | 2011-11-23 | 保靖天瑞钒业有限公司 | Circulating graded leaching method of stone coal acid-leaching vanadium extraction sulfuric acid |
| CN103060551B (en) * | 2012-12-31 | 2015-01-21 | 中国瑞林工程技术有限公司 | Method for leaching vanadium |
| CN103320628B (en) * | 2013-06-21 | 2015-01-21 | 长沙矿冶研究院有限责任公司 | Method for reducing acid consumption by concentrated acid aging method in process of leaching vanadium from navajoite |
| CN106756007B (en) * | 2016-12-05 | 2018-06-19 | 武汉科技大学 | A kind of leaching method for extracting vanadium from stone coal |
| CN112195347B (en) * | 2020-09-27 | 2022-07-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium extraction method of calcified vanadium slag |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184162A (en) * | 1996-12-06 | 1998-06-10 | 湖南省安化县东坪钒冶炼厂 | Vanadium pentoxide extracting method from stone coal vanadium ore |
| CN101275187A (en) * | 2007-03-26 | 2008-10-01 | 吉首大学 | Process for extracting vanadium by stone coal wet method |
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- 2010-09-15 CN CN2010102820149A patent/CN101935755B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184162A (en) * | 1996-12-06 | 1998-06-10 | 湖南省安化县东坪钒冶炼厂 | Vanadium pentoxide extracting method from stone coal vanadium ore |
| CN101275187A (en) * | 2007-03-26 | 2008-10-01 | 吉首大学 | Process for extracting vanadium by stone coal wet method |
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