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A recovery method for valuable metal elements in converter vanadium slag

A technology of converter vanadium slag and metal elements, which is applied in the field of comprehensive utilization of resources, can solve the problems of high waste discharge, high energy consumption, which cannot be solved fundamentally, and achieve the goal of reducing emissions, reducing difficulty, reducing energy consumption and material consumption Effect

Active Publication Date: 2017-03-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the above-mentioned patents have improved the vanadium extraction process to a certain extent, they still have not got rid of the method of roasting first and then extracting vanadium, and the problems of high energy consumption and high waste discharge in the production process cannot be fundamentally solved

Method used

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  • A recovery method for valuable metal elements in converter vanadium slag

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Effect test

Embodiment 1

[0037] The recovery method of valuable metal elements in converter vanadium slag specifically includes the following steps:

[0038] Step 1: Crush the converter vanadium slag to 0.1~150μm, then mix the sulfuric acid and the converter vanadium slag evenly with a liquid-to-solid ratio of 15:1, and stir to obtain the leaching slurry. After separation, the leaching solution and the leaching slag are obtained. Among them: sulfuric acid The concentration is 100g / L; the leaching temperature is 110℃, the leaching time is 180min, and the stirring speed is 200rpm;

[0039] Step 2: Mix the leachate of step 1 with vanadium slag crushed to 0.1~150μm, and the ratio of liquid to solid is 10:1;

[0040] Step 3: Agitated leaching process is carried out by introducing oxygen. During the leaching process, oxygen is passed to ensure the conversion of iron to ferric ions, and a stage of leaching slurry is obtained. After separation, a stage of leaching liquid and a stage of leaching residue are obtained....

Embodiment 2

[0047] The recovery method of valuable metal elements in converter vanadium slag specifically includes the following steps:

[0048] Step 1: Crush the converter vanadium slag to 0.1-150μm, then mix the titanium dioxide waste acid with the converter vanadium slag uniformly, with a liquid-to-solid ratio of 5:1, and leaching with stirring to obtain the leaching slurry. After separation, the leaching solution and the leaching residue are obtained. Among them: the leaching temperature is 200℃, the leaching time is 30min, and the stirring speed is 800rpm;

[0049] Step 2: Mix the leachate of step 1 with vanadium slag crushed to 0.1~150μm, and the liquid-solid ratio is 3:1;

[0050] Step 3: Agitated leaching process is carried out with oxygen. During the leaching process, oxygen is passed to ensure the conversion of iron to ferric ions, and a stage of leaching slurry is obtained. After separation, a stage of leaching liquid and a stage of leaching residue are obtained. The leaching temperat...

Embodiment 3

[0057] The recovery method of valuable metal elements in converter vanadium slag specifically includes the following steps:

[0058] Step 1: Crush the converter vanadium slag to 0.1-150μm, then mix the titanium dioxide waste acid and the converter vanadium slag uniformly, with a liquid-solid ratio of 8:1, and stir and leach to obtain the leaching slurry. After separation, the leaching liquid and the leaching slag are obtained. Among them: the leaching temperature is 160℃, the leaching time is 90min, and the stirring speed is 500rpm;

[0059] Step 2: Mix the leachate from step 1 with vanadium slag crushed to 0.1~150μm, and the ratio of liquid to solid is 4:1;

[0060] Step 3: Enter oxygen to carry out a stirring leaching process. During the leaching process, oxygen is passed to ensure the conversion of iron to ferric ions, and a leaching slurry is obtained. After separation, a leaching liquid and a leaching residue are obtained respectively. The leaching temperature is 130°C, and the ...

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Abstract

The invention discloses a method for recovering valuable metal elements in converter vanadium slag and belongs to the field of comprehensive resource utilization. According to the method, valuable metal elements in the converter vanadium slag are extracted by adopting a two-section leaching mode. The method comprises the following steps: crushing the converter vanadium slag, mixing the converter vanadium slag with a raw material of which the main component is sulfuric acid, stirring, leaching and thus obtaining leaching solution; mixing the converter vanadium slag with the leaching solution, leaching to obtain primary leaching ore pulp, separating to obtain primary leaching slag and primary leaching solution, performing extraction and reextraction on the primary leaching solution to separate the valuable metals such as vanadium and iron, and mixing the primary leaching slag and the raw material of which the main component is sulfuric acid so as to enter the secondary leaching process; allowing the obtained secondary leaching solution to enter the primary leaching process, wherein the secondary leaching slag refers to tailings, the main component of the slag is silica, and the slag can be used for cement and other industrial raw materials or can be used for preparing silicon carbide and other materials. By adopting the method, the valuable metal elements in the converter vanadium slag are extracted, and the slag-free production process is realized, so that the method is a green and environment-friendly vanadium extraction process.

Description

Technical field [0001] The invention belongs to the field of comprehensive utilization of resources, and particularly relates to a method for recovering valuable metal elements in converter vanadium slag. Background technique [0002] my country is rich in vanadium-titanium magnetite resources, with proven reserves of more than 10 billion tons. The vanadium slag produced during smelting using this resource generally contains 10-15% vanadium. It is an important raw material for the production of vanadium and vanadium products. . Vanadium is an important material indispensable for the development of modern industry, modern defense, and modern science and technology. At present, vanadium and vanadium products are widely used in special alloys, military industry, chemical industry, electronics, transportation and other fields, and their applications in other fields are also expanding. , And has good development prospects. Relevant statistics show that my country's vanadium output wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B34/22C21B3/04
CPCY02P10/20Y02W30/50
Inventor 张廷安吕国志刘燕张国权张莹杨大锦豆志河赵秋月
Owner NORTHEASTERN UNIV LIAONING