Method for decomposing stone coal vanadium ore by aging with sulfuric acid

A technology of stone coal vanadium and sulfuric acid, applied in the direction of improving process efficiency, can solve problems such as inability to carry out large-scale continuous production, difficult control of production process indicators, unstable product quality, etc., to save energy consumption and shorten leaching cycle. , the effect of pure leachate

Inactive Publication Date: 2013-02-06
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has such factors as long reaction period, great difficulty in building piles, inability to carry out l

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  • Method for decomposing stone coal vanadium ore by aging with sulfuric acid

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Example Embodiment

[0032] Example 1:

[0033] See attached figure 1 , Take 1000g of stone coal vanadium ore from a certain place in Guizhou, finely grind it to 65% below 0.074mm, control the moisture content to 7%, mix in 50g sodium sulfate, then add 126ml 98% concentrated sulfuric acid and mix well. The temperature of the obtained material was raised to 161°C, and then the matured material was placed in a sealed box and stored for 24h. After being taken out, the matured material was broken into pieces, and the liquid-solid ratio ml / g 2:1 was used to soak in water at 95°C for 6h. According to the experiment, the leaching rate of vanadium is 84.37% (based on slag), and the rate of iron leaching is 3.12% (based on slag). The leaching solution contains 3.39g / L vanadium and 0.61g / L iron.

Example Embodiment

[0034] Example 2:

[0035] Take 1000g of stone coal vanadium ore from a certain place in Shaanxi, finely grind it to 70% below 0.074mm, control the moisture content to 5%, mix in 60g sodium sulfate, and then add 140ml 98% concentrated sulfuric acid to mix and mature. The temperature of the obtained material was raised to 168°C, and then the matured material was placed in a sealed box for 36h. After taking it out, the matured material was crushed, and the liquid-solid ratio was used to immerse in water at 90°C for 6h at a ratio of ml / g of 1.8:1. According to the experiment, the vanadium leaching rate was 80.06% (based on slag), and the iron leaching rate was 3.88% (based on slag). The leaching solution contained 4.23g / L vanadium and 0.44g / L iron.

Example Embodiment

[0036] Example 3:

[0037] Take 1000g of stone coal vanadium ore from a place in Shiyan, Hubei, finely grind it to 70% below 0.074mm, control the water content of the material to 5%, mix in 60g of sodium sulfate, and then add 82ml of 98% concentrated sulfuric acid and mix well. It was measured that the temperature of the material was raised to 155°C, and then the material was placed in a sealed box and cured for 48 hours. After taking it out, the clinker was broken into pieces, and the liquid-solid ratio ml / g 2:1 was used to immerse in water at 95°C for 6 hours. According to the experiment, the leaching rate of vanadium is 84.12% (based on slag), and the leaching rate of iron is 2.57% (based on slag). The leaching solution contains 3.12g / L vanadium and 0.65g / L iron.

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Abstract

The invention discloses a method for decomposing stone coal vanadium ore by aging with sulfuric acid, which comprises the following steps: crushing the stone coal vanadium ore, carrying out fine grinding until the 65% of the stone coal vanadium ore is smaller than 0.074mm, controlling the water content at 3-8 wt%, adding sodium sulfate which accounts for 3-8 wt% into the material, adding concentrated sulfuric acid which accounts for 15-30 wt% into the material, aging for 12-48 hours, and leaching the aging material with water, wherein the liquid-to-solid ratio ml/g for leaching is 1.5:1-3:1, the leaching reaction is carried out at 85-100 DEG C for 2-6 hours, the vanadium leaching rate in the stone coal vanadium ore is higher than 80%, and the iron leaching rate is lower than 5%. The technique can implement controlled leaching of iron, and has the advantages of short process, high vanadium leaching rate, low iron leaching rate and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral resource processing, and in particular relates to a method for decomposing stone coal vanadium ore by sulfuric acid aging. Background technique [0002] Vanadium has a high melting point and is often called refractory metal together with niobium, tantalum, tungsten and molybdenum. Vanadium has good ductility, hard quality, resistance to hydrochloric acid and sulfuric acid, and better resistance to gas-salt-water corrosion than most stainless steels. Therefore, vanadium is widely used in metallurgy, chemical industry and steel industry. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing. [0003] my country's vanadium resources are mainly contained in vanadium-titanium magnetite and stone coal vanadium ore. Stone coal vanadium deposits are widely distributed in southern my country, with stone coal reserves of 61.88 billion tons, and ...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B34/22
CPCY02P10/20
Inventor 王成彦尹飞居中军陈永强阮书锋杨永强揭晓武杨卜马保中张永禄邢鹏郜伟李强袁文辉杨玮娇
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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