Method for extracting vanadium and aluminum from vanadium-containing stone coal and clay vanadium ore

A vanadium stone and clay technology, applied in the field of rare metal extraction, can solve the problems of difficulty and high cost of waste liquid treatment, difficult treatment process, long leaching time, etc., achieves easy solid-liquid separation and subsequent treatment, reduces environmental pollution, and reaction short time effect

Inactive Publication Date: 2011-10-19
SHANGHAI GETAI INDAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first type of process produces a large amount of toxic and harmful gases during roasting, serious environmental pollution, complicated process, and low recovery rate of vanadium (50%-60%)
The second type of process has long leaching time, high energy consumption, large acid consumption, high cost, and the highest leaching rate of vanadium is only about 80%.
However, when this technology is implemented, sulfuric acid must be leached at high temperature for a long time, and the process is complex and energy-consuming. Except for vanadium, other valuable metals cannot be effectively recovered.
The leaching solution contains impurities such as iron and a large amount of sol-like substances such as silicon and aluminum, which makes subsequent treatment processes such as solid-liquid separation very difficult, and the difficulty and cost of waste treatment are very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Vanadium-containing stone coal 100g, particle size -170 mesh, add water 100mL, industrial fluosilicic acid 130mL, react at 95°C for 2 hours, filter and rinse with tap water three times to obtain leaching solution 309.6mL, leaching residue 89.5g, leaching solution containing V 2 o 5 3.90g / L, Al 2 o 3 31.06g / L, the leaching residue contains V 2 o 5 0.068%, Al 2 o 3 4.12%. Add Yuanming powder (Na 2 SO 4 ) 32g, obtain 41.2g of sodium fluorosilicate, add NaClO to the solution after separating sodium fluorosilicate 3 0.4g, lime powder 14g, solution pH2.20, use D301 resin 7mL to adsorb vanadium, wash the rich loaded resin with 8% sodium hydroxide solution, produce V 2 o 5 Add 27.1mL of the eluent with a concentration of 43.6g / L, add 2.5g of industrial ammonium chloride to the eluent to obtain ammonium metavanadate, and burn the ammonium metavanadate at 530°C for 3h to obtain powder V 2 o 5 1.09g, its V 2 o 5 The content is 99.1%. Put sodium fluorosilicate into t...

Embodiment 2

[0022] Clay vanadium ore 100g, particle size -60 mesh, add water 90mL, industrial fluosilicic acid 140mL, react at 98°C for 2h, filter and rinse with tap water three times to obtain leaching solution 303.2mL, leaching residue 88g, leaching solution containing V 2 o 5 3.80g / L, Al 2 o 3 36.98g / L, the leaching residue contains V 2 o 5 0.12%, Al 2 o 3 5.83%. Add Yuanming powder (Na 2 SO 4 ) 34.5g, obtain 43.2g of sodium fluorosilicate, add NaClO to the solution after separating sodium fluorosilicate 3 0.4g, lime powder 13g, solution pH2.15, use D301 resin 7mL to adsorb vanadium, wash the rich loaded resin with 8% sodium hydroxide solution, produce V 2 o 5Add 25.4mL of the eluent with a concentration of 40.2g / L to the eluent, add 2.4g of industrial ammonium chloride to obtain ammonium metavanadate, and burn the ammonium metavanadate at 530°C for 3h to obtain powder V 2 o 5 1.09g, its V 2 o 5 The content is 98.7%. Put sodium fluorosilicate into the reactor, add concen...

Embodiment 3

[0025] 100g of ash after combustion of vanadium-containing stone coal fluidized bed, particle size -120 mesh, add 100mL of water, 150mL of industrial fluosilicic acid, react at 96°C for 2h, filter and rinse with tap water three times to obtain 324.5mL of leaching solution, leaching residue 86g. Leaching solution contains V 2 o 5 4.01g / L, Al 2 o 3 45.2g / L, the leaching residue contains V 2 o 5 0.063%, Al 2 o 3 6.43%. Add Yuanming powder (Na 2 SO 4 ) 37g, obtain 46.8g of sodium fluorosilicate, add NaClO to the solution after separating sodium fluorosilicate 3 0.4g, lime powder 15g, solution pH2.30, use D301 resin 7mL to adsorb vanadium, wash the rich loaded resin with 8% sodium hydroxide solution, produce V 2 o 5 Add 27.3mL of the eluent with a concentration of 44.3g / L to the eluent, add 2.6g of industrial ammonium chloride to obtain ammonium metavanadate, and burn the ammonium metavanadate at 530°C for 3h to obtain powder V 2 o 5 1.19g, its V 2 o 5 The content i...

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Abstract

The invention relates to a method for extracting vanadium and aluminum from vanadium-containing stone coal and clay vanadium ore, which belongs to the technical field of extraction of rare metals. A vanadium source is reacted with a leaching agent comprising silicofluoric acid and water for getting a solution containing the vanadium and the aluminum, vanadic oxide is further obtained through the ion exchange method or the solvent extraction method, and aluminum salts are finally recovered from the solution after vanadium extraction. By adopting the method, hydrofluosilic acid can be recycled for a plurality of times and the environmental pollution is reduced; and the problem that a by-product, namely tschermigite with limited purposes is generated in the prior art can be further solved, and iron-free aluminum sulfate which can be used for paper-making is generated through the solvent extraction method.

Description

technical field [0001] The invention relates to a method in the technical field of rare metal extraction, in particular to a method for extracting vanadium and aluminum from vanadium-containing stone coal and clay vanadium ore. Background technique [0002] Vanadium is an important rare metal widely used in the production of alloy steel, non-ferrous metal alloys and catalysts in the chemical industry. Vanadium-bearing stone coal and clay vanadium ore widely distributed in my country are important raw materials for vanadium extraction. These minerals also contain valuable metals such as aluminum. [0003] At present, the process of extracting vanadium from this kind of vanadium ore is divided into two categories: one is pyrometallurgical treatment, that is, adding different salts and roasting together with vanadium-containing raw materials, and it is divided into oxidation roasting, sodium oxidation roasting, and calcification roasting. , Sodium calcification roasting. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B21/00C22B34/22
CPCY02P10/20
Inventor 陈盾陈乐蔡晋强肖文丁黄正平
Owner SHANGHAI GETAI INDAL DEV
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