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Method for extracting valuable metal in vanadium containing material by microwave heating preprocessing

A valuable metal, microwave heating technology, applied in the field of non-ferrous metallurgy, can solve the problems of low recovery rate of vanadium, unfavorable industrial large-scale promotion, large amount of additives, etc., achieve leaching rate and recovery rate is simple, shorten microwave reaction time, leaching The effect of high rate and recovery rate

Active Publication Date: 2015-09-23
NORTHEASTERN UNIV
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Problems solved by technology

However, there are some defects in these two processes: a large amount of polluting gas Cl is generated 2 , HCl, SO 2 , the roasting process consumes a lot of energy, the amount of additives used in the roasting process is relatively large, and the recovery rate of vanadium is generally lower than 60%.
In the process proposed by Wuxi Yongfa Plating Co., Ltd., it is pointed out that microwave roasting with composite additives is required. The process requires additives, which will lead to an increase in production costs. The microwave process takes 2.5 to 3.5 hours at a temperature of 700 to 800 ° C. The roasting time is long, High temperature requires higher energy consumption, which is not conducive to large-scale industrial promotion
[0006] Nantong Hanrui Industrial Co., Ltd., Yu Hua of Shanghai Normal University and others proposed "the extraction process of vanadium in vanadium ore leached by microwave alkali solution", the patent publication number is CN 101955226A, which pointed out that the method of "grinding, carbon removal , alkaline leaching, microwave, etc." process to treat vanadium ore, decarburization needs to be calcined at 400-1000 ° C for 0.5-2 hours, and alkaline leaching takes 1-8 hours, and the oxidant perchloric acid needs to be added during the alkaline leaching process Sodium or calcium hypochlorite, the vanadium extraction method of this patent is too complicated

Method used

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  • Method for extracting valuable metal in vanadium containing material by microwave heating preprocessing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take converter vanadium slag for grinding and screening to a particle size of ≤200 mesh, heat in a microwave heating reactor at a heating temperature of 350°C and a heating time of 10 minutes; grind the microwave-treated material to a particle size of ≤200 mesh, using 200g / L According to the liquid-solid ratio of 10:1, the leaching temperature is 90°C, the leaching time is 1h, and the stirring speed is 400rpm, the vanadium slag is leached, and then the leaching solution is obtained after liquid-solid separation, and the vanadium leaching rate is measured. The leaching rate of iron is 92.8%, the leaching rate of iron is 87.9%, the leaching rate of manganese is 97.6%, and the leaching rate of chromium is 64.2%;

[0027] Extract the leaching solution, select P204 (bis(2-ethylhexyl) phosphate) as the extractant, and sulfonated kerosene as the diluent; wherein, the number of extraction stages is selected to be 3, and the extraction conditions of each stage are: adjust water ...

Embodiment 2

[0029] Take converter vanadium slag for grinding and screening to a particle size of ≤200 mesh, and heat it in a microwave heating reactor at a heating temperature of 150°C for a heating time of 20 minutes; after microwave treatment, the material has a particle size of ≤200 mesh and uses 300g / L According to the liquid-solid ratio of 12.5:1, the leaching temperature is 85°C, the leaching time is 3h, and the stirring speed is 300rpm, the vanadium slag is leached, and then the leaching solution is obtained after liquid-solid separation, and the leaching rate of vanadium is measured. The leaching rate of iron is 97.6%, the leaching rate of manganese is 97.3%, and the leaching rate of chromium is 58.4%;

[0030] Extract the leaching solution, choose primary amine N1923 as the extractant, and sulfonated kerosene as the diluent; wherein, the number of extraction stages is selected to be 5, and the extraction conditions of each stage are: adjust the initial pH value of the aqueous phas...

Embodiment 3

[0032]Take converter vanadium slag for grinding and screening to a particle size of ≤200 mesh, heat in a microwave heating reactor at a heating temperature of 450°C and a heating time of 10 minutes; grind the microwave-treated material to a particle size of ≤200 mesh, using 250g / L According to the liquid-solid ratio of 15:1, the leaching temperature is 80°C, the leaching time is 4h, and the stirring speed is 200rpm, the vanadium slag is leached, and then the leaching solution is obtained after liquid-solid separation, and the vanadium leaching rate is measured. The leaching rate of iron was 94.2%, the leaching rate of iron was 89.3%, the leaching rate of manganese was 98.2%, and the leaching rate of chromium was 55.7%;

[0033] Extract the leaching solution, select P204 (di(2-ethylhexyl) phosphate) as the extractant, and sulfonated kerosene as the diluent; wherein, the extraction stages are selected to be grade 6, and the extraction conditions of each stage are: adjust The ini...

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Abstract

The invention provides a method for extracting valuable metal in a vanadium containing material by microwave heating preprocessing to overcome the shortcoming existing in a method for vanadium containing material microwave preprocessing in the prior art and belongs to the technical field of colored metallurgy. The method comprises the steps that the vanadium containing material is subjected to solid phase microwave heating, heating time is 10-20 min, heating temperature is 150-450 DEG C, and then the heated vanadium containing material is taken out and ground until the granularity is smaller than or equal to 200 meshes; the vanadium containing material subjected to microwave processing is added into a sulfuric acid solution for leaching, then, liquid-solid separating is carried out, and leachate containing the valuable metal of vanadium, iron, manganese, chromium and the like is obtained; the leachate is subjected to extraction and re-extraction, vanadium in the leachate is separated, and a vanadium product is obtained by recycling; and iron, manganese, chromium and the like in the leachate are obtained by separating through a coprecipitation method and are used as raw materials for preparing special alloy. According to the method, the production cost for extracting valuable metal elements from the vanadium containing material can be lowered, additive loss and energy loss are lowered, and the multipurpose utilization rate of the vanadium containing material, especially the vanadium titano-magnetite resources is improved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, in particular to a method for extracting valuable metals in vanadium-containing materials through microwave heating pretreatment. Background technique [0002] Valuable metals refer to other metals that have recycling value in addition to the main metals among the raw materials for refining metals. Generally speaking, whether a certain metal has recycling value depends on the use value of the metal, the cost of recycling and its commodity price. [0003] Converter vanadium slag is a kind of slag produced by blast furnace ironmaking and converter steelmaking with vanadium-titanium magnetite as raw material. The vanadium products produced by using it as the main raw material for vanadium extraction account for 40% of the total vanadium products. The vanadium element in converter vanadium slag mostly exists in vanadium iron spinel in the form of isomorphism, and is commonly found in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/08C22B3/38C22B34/22
Inventor 张廷安张国权吕国志刘燕赵秋月张莹豆志河牛丽萍
Owner NORTHEASTERN UNIV
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