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A method for acidic decomposition of vanadium slag

A technology of acid decomposition and vanadium slag, applied in the field of chemical metallurgy, can solve the problems of low efficiency, polluted environment, short process, clean and environmental protection, etc., and achieve the effects of abundant raw material sources, high comprehensive utilization rate and energy saving

Active Publication Date: 2016-08-31
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of method of acid decomposition vanadium slag, and this method process flow is short, clean and environment-friendly, low consumption and high efficiency, overcomes the vanadium recovery rate existing in existing vanadium slag sodium roasting vanadium extraction production method, vanadium The slag associated elements iron, chromium, and titanium cannot be recycled simultaneously, and harmful gases such as chlorine are produced during the production process to pollute the environment, and the roasting process has high energy consumption and low efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The method for acidic decomposition of vanadium slag of the present invention, carries out according to the following steps:

[0030] 1) Take 20g of Chenggang vanadium slag and place it in an acid reactor, slowly add 98% sulfuric acid, and add sulfuric acid according to the following ratio: the sum of the amount of Cr, Fe, Mn, Ti, V in the vanadium slag and the amount of sulfuric acid The quantity ratio is 1:2.5;

[0031] 2) Under compressed air stirring, control the air flow rate to 1L / min, slowly add water, adjust the final sulfuric acid concentration to 80wt%, and maintain the reaction for 0.5h to obtain acidolysis vanadium slag;

[0032] 3) After the acidolysis vanadium slag is solidified, stop the air agitation, and maintain the reaction temperature for 1h to obtain the acidolysis vanadium slag solidification;

[0033] 4) Reactant leaching: add water with a mass five times that of the vanadium slag into the reactor, and leaching for 2 hours at a temperature of 80°...

Embodiment 2

[0037] The method for acidic decomposition of vanadium slag of the present invention, carries out according to the following steps:

[0038] 1) Take 20g of Chenggang vanadium slag and place it in an acid reactor, slowly add 98% sulfuric acid, and add sulfuric acid according to the following ratio: the sum of the amount of Cr, Fe, Mn, Ti, V in the vanadium slag and the amount of sulfuric acid The quantity ratio is 1:1.5;

[0039] 2) Under compressed air stirring, control the air flow rate to 0.5L / min, slowly add water, adjust the final sulfuric acid concentration to 85wt%, and maintain the reaction for 0.5h to obtain acidolysis vanadium slag;

[0040] 3) After the acidolysis vanadium slag is solidified, the air stirring is stopped, and the reaction temperature is maintained for 2 hours to obtain the acidolysis vanadium slag solidification;

[0041] 4) Reactant leaching: Add water with a mass 2.5 times the mass of vanadium slag into the reactor, and leaching for 4 hours at a te...

Embodiment 3

[0045] The method for acidic decomposition of vanadium slag of the present invention, carries out according to the following steps:

[0046] 1) Take 20g of Chenggang vanadium slag and place it in an acid reactor, slowly add 98% sulfuric acid, and add sulfuric acid according to the following ratio: the sum of the amount of Cr, Fe, Mn, Ti, V in the vanadium slag and the amount of sulfuric acid The quantity ratio is 1:2;

[0047] 2) Under compressed air stirring, control the air flow rate to 5L / min, slowly add water, adjust the final sulfuric acid concentration to 90wt%, and maintain the reaction for 2h to obtain acidolysis vanadium slag;

[0048] 3) After the acidolysis vanadium slag is solidified, stop the air stirring, and maintain the reaction temperature for 4h to obtain the acidolysis vanadium slag solidification;

[0049] 4) Reactant leaching: add water twice the mass of vanadium slag into the reactor, and leaching for 1 hour at a temperature of 50°C and a compressed air ...

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PUM

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Abstract

The invention provides an acid decomposition method of vanadium slag, which comprises following steps: (A) weighing a certain amount of vanadium slag and adding the vanadium slag in an acid-type reactor, and slowly adding 98% industrial sulphuric acid; (B) adding quantitated industrial water with stirring by compressed air, maintaining the temperature for 0.5-2 h, stopping the air-stirring after the acid-decomposition vanadium slag solidified, and maintaining the reaction temperature for 0.5-4 h; (C) adding a proper amount of water, performing leaching for 1-4 h to obtain an acid-decomposition vanadium slag mixed slurry with stirring by compressed air at 50-95 DEG C; and (D) filtering and separating the acid-decomposition vanadium slag mixed slurry to obtain a tail slag and a leaching solution containing vanadium, titanium, iron, chromium and manganese. The method is energy-saving and high-efficient, is abundant in raw materials, is low in cost, is carried out under normal pressure, is easy to carry out, is high in resource comprehensive utilization rate, is higher than 98% in dissolving-out rate of vanadium and is higher than 97% in dissolving-out rate of chromium.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and metallurgy, and in particular relates to a method for acidic decomposition of vanadium slag. Background technique [0002] Vanadium is an important strategic metal widely used in metallurgy, aerospace and chemical industry and other fields. At present, the main raw material for extracting vanadium is vanadium-titanium magnetite. Vanadium-titanium magnetite is produced in blast furnace or direct reduction process to produce vanadium-containing molten iron. During the process of oxidizing vanadium-containing molten iron and blowing vanadium, vanadium is oxidized and enters the slag to obtain higher vanadium content. Vanadium slag. Since the vanadium-titanium magnetite contains vanadium, titanium, and some chromium, most of the vanadium, titanium, and chromium are oxidized into the slag during the vanadium blowing process, and a large amount of iron is mixed in the slag. [0003] Vana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B34/22C22B34/12C22B34/32C22B47/00
CPCY02P10/20
Inventor 常福增王素杰陈东辉
Owner HEBEI IRON AND STEEL