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Method for extracting vanadium pentoxide from secondary vanadium slag

A technology for vanadium pentoxide and vanadium slag, applied in the field of extracting vanadium pentoxide, can solve the problems of high cost, no actual economic value, low vanadium content in secondary vanadium slag, etc., so as to improve the recovery rate and the utilization rate. , the effect of increasing the conversion rate

Inactive Publication Date: 2017-02-01
峨眉山市中山新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low vanadium content in the secondary vanadium slag, the current commonly used extraction methods are costly and have no practical economic value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for extracting vanadium pentoxide from secondary vanadium slag of the present embodiment may further comprise the steps:

[0019] S1, detect the content of vanadium in the secondary vanadium slag, when the vanadium content is lower than 4% by weight, add the primary vanadium slag, so that the vanadium content of the mixed vanadium slag is greater than 4% by weight;

[0020] S2, drying the mixed vanadium slag after being ground to 80 mesh, the water content is less than 5% by weight;

[0021] S3, mix vanadium slag and sodium carbonate with a mass ratio of 100:1.5;

[0022] S4, put the mixture into the rotary kiln, heat it to 790°C and keep it warm, take a sample and measure it, the vanadium element is converted into NaVO 3 Stop heating when it reaches more than 80%;

[0023] S5, the heated mixture is mixed with water in a mass ratio of 1:3, and the filtrate is obtained after filtering;

[0024] S6, adding calcium chloride to the filtrate to generate calcium...

Embodiment 2

[0029] The method for extracting vanadium pentoxide from secondary vanadium slag of the present embodiment may further comprise the steps:

[0030] S1, detect the content of vanadium in the secondary vanadium slag, when the vanadium content is lower than 4% by weight, add the primary vanadium slag, so that the vanadium content of the mixed vanadium slag is greater than 4% by weight;

[0031] S2, drying the mixed vanadium slag after grinding to 100 mesh, the water content is less than 5% by weight;

[0032] S3, mix vanadium slag and sodium carbonate with a mass ratio of 100:2;

[0033] S4, put the mixture into the rotary kiln, heat it to 800°C and keep it warm, take a sample and measure it, the vanadium element is converted into NaVO 3 Stop heating when it reaches more than 80%;

[0034] S5, the heated mixture is mixed with water in a mass ratio of 1:3, and the filtrate is obtained after filtering;

[0035] S6, adding calcium chloride to the filtrate to generate calcium phos...

Embodiment 3

[0040] The method for extracting vanadium pentoxide from secondary vanadium slag of the present embodiment may further comprise the steps:

[0041] S1, detect the content of vanadium in the secondary vanadium slag, when the vanadium content is lower than 4% by weight, add the primary vanadium slag, so that the vanadium content of the mixed vanadium slag is greater than 4% by weight;

[0042] S2, drying the mixed vanadium slag after grinding to 120 mesh, the water content is less than 5% by weight;

[0043] S3, mix vanadium slag and sodium carbonate with a mass ratio of 100:3;

[0044] S4, put the mixture into the rotary kiln, heat it to 830°C and keep it warm, take a sample and measure it, the vanadium element is converted into NaVO 3 Stop heating when it reaches more than 80%;

[0045] S5, the heated mixture is mixed with water in a mass ratio of 1:3, and the filtrate is obtained after filtering;

[0046] S6, adding calcium chloride to the filtrate to generate calcium phos...

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Abstract

The invention belongs to the technical field of vanadium ore processing, and particularly relates to a method for extracting vanadium pentoxide from secondary vanadium slag. The method comprises the following steps of regulating content of vanadium in the secondary vanadium slag, grinding the secondary vanadium slag, mixing the ground secondary vanadium slag with sodium carbonate to obtain a mixture, heating the mixture through a rotary kiln, adding water into the mixture, and filtering the mixture to obtain filtrate; adding calcium chloride into the filtrate to generate precipitates, regulating the pH value, adding ammonium chloride to obtain ammonium polyvanadate; and heating the ammonium polyvanadate to dehydrate and remove ammonium, thereby obtaining the vanadium pentoxide. According to the method for extracting vanadium pentoxide from secondary vanadium slag, vanadium can be effectively extracted from the secondary vanadium slag with relative low vanadium content, so that the secondary vanadium slag is changed into things of value, and therefore, a utilization rate of natural resources is increased.

Description

technical field [0001] The invention belongs to the technical field of vanadium ore processing, and in particular relates to a method for extracting vanadium pentoxide from secondary vanadium slag. Background technique [0002] Metal vanadium plays an important role in the steel industry. Vanadium is usually associated in other mines. Before producing vanadium, it is necessary to process vanadium slag from vanadium-containing ore, and then process vanadium pentoxide from vanadium slag. The vanadium slag obtained from the processing of vanadium-containing ores is a primary slag with a relatively high vanadium content and is relatively easy to extract. However, the vanadium in the vanadium slag cannot be completely extracted through one-time extraction. The vanadium slag after primary extraction is called secondary vanadium slag. Due to the low vanadium content in the secondary vanadium slag, the current commonly used extraction methods are costly and have no practical econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/02C22B34/22
CPCC22B1/02C22B7/04C22B34/22Y02P10/20
Inventor 钟连洪曾学萍钟敏
Owner 峨眉山市中山新材料科技有限公司
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