CN102936660A - Method for leaching vanadium from vanadous stone coal roasting slag - Google Patents
Method for leaching vanadium from vanadous stone coal roasting slag Download PDFInfo
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- CN102936660A CN102936660A CN2012104163757A CN201210416375A CN102936660A CN 102936660 A CN102936660 A CN 102936660A CN 2012104163757 A CN2012104163757 A CN 2012104163757A CN 201210416375 A CN201210416375 A CN 201210416375A CN 102936660 A CN102936660 A CN 102936660A
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Abstract
The invention relates to a technique for leaching vanadium pentoxide from vanadous stone coal, which comprises the following steps: 1) crushing, carrying out ball milling, and grading to obtain a fine particle product and a coarse particle product; 2) leaching the fine particle product with a dilute sulfuric acid solution to obtain a dilute acid leaching solution; 3) carrying out flotation on the coarse particle product to obtain flotation concentrate; 4) leaching the flotation concentrate with a sulfuric acid solution to obtain a strong acid leaching solution; and 5) carrying out impurity removal, extraction, vanadium precipitation and calcination on the dilute acid leaching solution and the strong acid leaching solution to obtain the product. The invention has the following advantages: (1) the fine particle product is leached with dilute sulfuric acid, so that the acid consumption is low and the leaching ratio is high; (2) the graded coarse particle product is subjected to flotation, thereby enhancing the vanadium grade and reducing the amount of the material entering the leaching step; (3) the fine particle product is leached with dilute acid, and the unmanageable flotation concentrate is leached with strong acid, thereby obtaining fewer leaching impurities and lowering the impurity removal difficulty and reagent consumption in the subsequent purification process; and (4) the vanadium recovery rate can be enhanced by 4-8%.
Description
Technical field
The present invention relates to and leach Vanadium Pentoxide in FLAKES from Rock coal containing alum, be specifically related to the Rock coal containing alum fired slags is carried out to classification, flotation, and then the technique leached.
Background technology
The technology of existing vanadium extraction from Rock coal containing alum, first by ore roasting certain hour at a certain temperature mostly, then adopt acid or alkaline solution to be leached fired slags, vanadium is entered in solution, then adopt the method for solvent extraction or ion-exchange to improve vanadium concentration in solution, finally carry out precipitation.In leaching process, owing to containing the acid of more consumption or consumption alkaloid substance in material, cause leaching reagent consumption large, leach cost high.And due to acid or alkali concn high, can leach a large amount of impurity, increase difficulty to follow-up purifying step.If can before leaching, to material, carry out pre-treatment, abandon in advance the part mine tailing, improve the vanadium grade, can greatly reduce reagent consumption, reduce purification of leaching liquor removal of impurities difficulty, reduce production costs.
Summary of the invention
The object of the present invention is to provide a kind of effectively method of leaching vanadium from the Rock coal containing alum fired slags, by classification, flotation, abandon the part mine tailing, improve the vanadium grade, reduce reagent consumption, reduce production costs, and improve vanadium recovery.
The present invention solves the problems of the technologies described above adopted technical scheme: the method for leaching vanadium from the Rock coal containing alum fired slags is characterized in that including following steps:
1) at first the bone coal fired slags is carried out to fragmentation, then with ball mill, it is milled to granularity and is less than-200 orders and account for 75 ~ 95%, the ore grinding ore pulp is carried out to classification, obtain fine fraction product and coarse fraction product, be limited to 400 orders ~ 300 orders on the granularity of fine fraction product;
2) with dilution heat of sulfuric acid, the fine fraction product is leached, liquid-solid ratio is 3 ~ 6:1, and dilute sulphuric acid concentration is 0.5% ~ 5%, and extraction temperature is 65 ~ 95 ℃, and extraction time 2h ~ 8h obtains diluted acid leaching liquid;
3) the coarse fraction product is carried out to flotation, obtain flotation concentrate;
4) with sulphuric acid soln, flotation concentrate is leached, sulfuric acid concentration is 10% ~ 30%, and extraction temperature is 65 ~ 95 ℃, extraction time 4h ~ 12h, and liquid-solid ratio is 3 ~ 6:1, obtains the strong acid leach liquor;
5) step 2) gained diluted acid leaching liquid and step 4) gained strong acid leach liquor, after purification and impurity removal, extraction or ion-exchange absorption and desorb, precipitation, calcination process, obtain the Vanadium Pentoxide in FLAKES product.
Press such scheme, the flotation collector that described flotation adopts is amino dodecane and oleyl amine mixture, and amino dodecane and oleyl amine mass ratio are 2 ~ 5:1, and the consumption of flotation collector is that 100g/t ~ 300g/t(refers to 100-300g collecting agent coarse fraction product per ton).
Press such scheme, in floatation process, add water glass as inhibitor, the inhibitor consumption is that 80g/t ~ 320g/t(refers to 80-320g inhibitor coarse fraction product per ton).
Compared with the prior art the present invention, has following advantage and effect:
1. first the bone coal fired slags after ore grinding is carried out to classification, separate fine fraction, to fine fraction, adopt the dilute sulphuric acid of lower concentration to leach, the acid consumption is little, and leaching yield is high;
2. the coarse fraction product of classification carried out to flotation, improved the vanadium grade, abandon the part mine tailing, reduced and entered the inventory that leaches the operation, further reduced sour consumption;
3. the fine fraction that commute soaks adopts diluted acid leaching, and the flotation concentrate that difficulty is soaked adopts strong acid to leach, and impurity leaches few, has reduced follow-up purification and impurity removal difficulty and reagent consumption;
4. under the same terms, adopt the present invention, can improve vanadium recovery 4% ~ 8%;
5. the flotation tailings that obtained does not have acidity, can be used for producing building materials, has improved resource utilization.
The accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention will be further described in detail, but this explanation can not be construed as limiting the invention.
Embodiment
1
Somewhere, Shaanxi Rock coal containing alum fired slags, pentoxide content 0.98%, as Fig. 1, carry out fragmentation, ball milling to ore, and in the ball milling product ,-200 order content are 76.23%, and then classification separates-400 order fine fraction products and+400 order coarse fraction products.-400 order fine fraction products adopt 1% sulfuric acid to leach 4h under 75 ℃, and liquid-solid ratio is 4:1, and leaching yield is 90.15%.Right+400 order coarse fraction products carry out flotation, and collecting agent is amino dodecane and oleyl amine mixture, and amino dodecane and oleyl amine quality proportioning are 2:1, and collector dosage is 200g/t, and inhibitor is water glass, consumption 120g/t.Through one roughing, flotation concentrate Vanadium Pentoxide in FLAKES grade is 1.41%, flotation recovery rate 88.39%.Flotation concentrate adopts 20% sulfuric acid to be leached, 95 ℃ of extraction temperatures, and extraction time 8h, liquid-solid ratio 4:1, leaching yield is 87.96%.Fine fraction product leach liquor and flotation concentrate leach liquor are merged, purification and impurity removal, resin absorption, desorb, precipitation, calcining obtains the Vanadium Pentoxide in FLAKES product.Whole process vanadium total yield 77.89%, and directly carry out acidleach to fired slags and compare, and vanadium recovery improves 4.53%.
Embodiment
2
Somewhere, Hubei Rock coal containing alum fired slags, pentoxide content 1.05%, carry out fragmentation, ball milling to ore, and in the ball milling product ,-200 order content are 88.41%, and then classification separates-400 order fine fraction products and+400 order coarse fraction products.-400 order fine fraction products adopt 2% sulfuric acid to leach 3h under 85 ℃, and liquid-solid ratio is 4:1, and leaching yield is 90.51%.Right+400 order coarse fraction products carry out flotation, and collecting agent is amino dodecane and oleyl amine mixture, and amino dodecane and oleyl amine quality proportioning are 3:1, and collector dosage is 180g/t, and inhibitor is water glass, consumption 150g/t.Through one roughing, flotation concentrate Vanadium Pentoxide in FLAKES grade is 1.65%, flotation recovery rate 89.24%.Flotation concentrate adopts 25% sulfuric acid to be leached, 95 ℃ of extraction temperatures, and extraction time 5h, liquid-solid ratio 4:1, leaching yield is 88.85%.Fine fraction product leach liquor and flotation concentrate leach liquor are merged, purification and impurity removal, resin absorption, desorb, precipitation, calcining obtains the Vanadium Pentoxide in FLAKES product.Whole process vanadium total yield 76.11%, and directly carry out acidleach to fired slags and compare, and vanadium recovery improves 5.62%.
Claims (3)
1. the method for leaching vanadium from the Rock coal containing alum fired slags is characterized in that including following steps:
1) at first the bone coal fired slags is carried out to fragmentation, then with ball mill, it is milled to granularity and is less than-200 orders and account for 75 ~ 95%, the ore grinding ore pulp is carried out to classification, obtain fine fraction product and coarse fraction product, be limited to 400 orders ~ 300 orders on the granularity of fine fraction product;
2) with dilution heat of sulfuric acid, the fine fraction product is leached, liquid-solid ratio is 3 ~ 6:1, and dilute sulphuric acid concentration is 0.5% ~ 5%, and extraction temperature is 65 ~ 95 ℃, and extraction time 2h ~ 8h obtains diluted acid leaching liquid;
3) the coarse fraction product is carried out to flotation, obtain flotation concentrate;
4) with sulphuric acid soln, flotation concentrate is leached, sulfuric acid concentration is 10% ~ 30%, and extraction temperature is 65 ~ 95 ℃, extraction time 4h ~ 12h, and liquid-solid ratio is 3 ~ 6:1, obtains the strong acid leach liquor;
5) step 2) gained diluted acid leaching liquid and step 4) gained strong acid leach liquor, after purification and impurity removal, extraction or ion-exchange absorption and desorb, precipitation, calcination process, obtain the Vanadium Pentoxide in FLAKES product.
According to claim 1 from the Rock coal containing alum fired slags method of leaching vanadium, it is characterized in that the flotation collector that the described flotation of step 3) adopts is amino dodecane and oleyl amine mixture, amino dodecane and oleyl amine mass ratio are 2 ~ 5:1, and the consumption of flotation collector is 100g/t ~ 300g/t.
According to claim 2 from the Rock coal containing alum fired slags method of leaching vanadium, it is characterized in that in floatation process adding water glass as inhibitor, the inhibitor consumption is 80g/t ~ 320g/t.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341411A (en) * | 2013-07-09 | 2013-10-09 | 云南楚雄矿冶有限公司 | Leaching residue grading and series flotation method for complex copper mine |
| CN104138806A (en) * | 2014-06-10 | 2014-11-12 | 中南大学 | Method for extracting V2O5 and carbon from low-carbon stone coal mine |
| CN106583027A (en) * | 2016-12-13 | 2017-04-26 | 昆明理工大学 | Carbonate type high-silicon bauxite beneficiation method |
| CN109207720A (en) * | 2018-11-14 | 2019-01-15 | 南华大学 | A kind of leaching method of extracting vanadium from stone coal |
Citations (3)
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|---|---|---|---|---|
| JP2001287913A (en) * | 2000-03-31 | 2001-10-16 | Taiyo Koko Co Ltd | Method for producing vanadium sulfate solution |
| CN101507949A (en) * | 2009-03-19 | 2009-08-19 | 株洲市湘麒科技开发有限公司 | Stone-like coal navajoite physical mineral dressing method |
| CN102477491A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for extracting vanadium from vanadium slag |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001287913A (en) * | 2000-03-31 | 2001-10-16 | Taiyo Koko Co Ltd | Method for producing vanadium sulfate solution |
| CN101507949A (en) * | 2009-03-19 | 2009-08-19 | 株洲市湘麒科技开发有限公司 | Stone-like coal navajoite physical mineral dressing method |
| CN102477491A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for extracting vanadium from vanadium slag |
Non-Patent Citations (1)
| Title |
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| 齐建云等: "一种新型无污染提钒工艺的研究", 《甘肃冶金》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341411A (en) * | 2013-07-09 | 2013-10-09 | 云南楚雄矿冶有限公司 | Leaching residue grading and series flotation method for complex copper mine |
| CN103341411B (en) * | 2013-07-09 | 2015-07-08 | 云南楚雄矿冶有限公司 | Leaching residue grading and series flotation method for complex copper mine |
| CN104138806A (en) * | 2014-06-10 | 2014-11-12 | 中南大学 | Method for extracting V2O5 and carbon from low-carbon stone coal mine |
| CN106583027A (en) * | 2016-12-13 | 2017-04-26 | 昆明理工大学 | Carbonate type high-silicon bauxite beneficiation method |
| CN106583027B (en) * | 2016-12-13 | 2019-06-11 | 昆明理工大学 | A kind of beneficiation method of carbonate-type high-silica diaspore ore |
| CN109207720A (en) * | 2018-11-14 | 2019-01-15 | 南华大学 | A kind of leaching method of extracting vanadium from stone coal |
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