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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has such factors as long reaction period, great difficulty in building piles, inability to carry out large-scale continuous production, difficult control of production process indicators, and unstable product quality.

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 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 water content to 7%, mix 50g of sodium sulfate, then add 126ml of 98% concentrated sulfuric acid and mix evenly, measure The temperature of the obtained material was raised to 161°C, and then the matured material was placed in a sealed box. After being stored for 24 hours, the matured material was taken out, crushed, and soaked in water at 95°C for 6 hours at a liquid-solid ratio of ml / g 2:1. According to the experiment, the leaching rate of vanadium was 84.37% (based on slag), the leaching rate of iron was 3.12% (based on slag), and the leaching solution contained 3.39g / L vanadium and 0.61g / L iron.

Embodiment 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 water content to 5%, mix it with 60g of sodium sulfate, and then add 140ml of 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 and stored for 36 hours. After taking it out, the matured material was crushed and soaked in water at 90°C for 6 hours at a liquid-solid ratio of ml / g 1.8:1. According to the experiment, the leaching rate of vanadium is 80.06% (based on slag), and the leaching rate of iron is 3.88% (based on slag). The leach solution contains 4.23g / L vanadium and 0.44g / L iron.

Embodiment 3

[0037] Take 1000g of stone coal vanadium ore from a certain place in Shiyan, Hubei, finely grind it to 70% below 0.074mm, control the water content of the material to 5%, mix it with 60g of sodium sulfate, and then add 82ml of 98% concentrated sulfuric acid and mix evenly. It was measured that the temperature of the material was raised to 155°C, and then the material was placed in a sealed box. After aging for 48 hours, the cooked material was taken out, crushed, and soaked in water at 95°C for 6 hours at a liquid-solid ratio of ml / g 2:1. According to the experiment, the leaching rate of vanadium was 84.12% (based on slag), the leaching rate of iron was 2.57% (based on slag), and the leaching solution contained 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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