Production method for high-purity chromium metal and vacuum arc furnace adopted by production method

A technology of a vacuum electric arc furnace and a production method, applied in the field of electric arc furnaces, can solve the problems of small production capacity, low efficiency, extremely difficult to produce products, etc., and achieve high production efficiency, low production cost, and reduced energy consumption and production cost. Effect

Active Publication Date: 2016-06-01
LOUDI DAJIN NEW MATERIAL CO LTD
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Problems solved by technology

However, since the whole process requires the use of a vacuum furnace, the production capacity is small, the efficiency is not high, and it is extremely diff...

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  • Production method for high-purity chromium metal and vacuum arc furnace adopted by production method

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Embodiment Construction

[0029] Below in conjunction with all accompanying drawings the present invention will be further described, and preferred embodiment of the present invention is: see appended figure 1 , a kind of production method of high-purity metallic chromium described in the present embodiment comprises the following steps:

[0030] 1) 100-120 parts of chromium trioxide with a content of 99%, 24-35 parts of carbon powder with a fixed carbon content of more than 95%, and 1-20 parts of a binder according to the weight ratio;

[0031] 2) According to the weight ratio, put the above ingredients into a dry powder mixer and stir for 30~40min to make a mixed raw material and set aside;

[0032] 3) Put the fully mixed raw materials into the compactor to make billets;

[0033] 4) Put the briquette into the material bin of the vacuum electric arc furnace, open the furnace door, start the arc first, and close the furnace door after the current temperature is reached, draw the vacuum to 100~110 Pa, ...

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Abstract

The invention provides a production method for high-purity chromium metal. The method includes the steps that prepared raw materials are put in a dry type mixer to be mixed according to a weight ratio; the uniformly mixed raw materials are put in a blank press for blank making; then a blank is put in a material chamber of a vacuum arc furnace so as to obtain a large chromium metal block; the baked chromium metal block is taken out and cooled; the cooled chromium metal block is delivered into a shot-blast chamber so as to obtain a metal block; the metal block is hammered and broken into 100-mm blocks; the hammered and broken blocks are delivered into a jaw crusher to be crushed into broken chromium metal blocks which meet the national standard; and the broken chromium metal blocks are put in a graphite box, then degassing is performed at the vacuum degree of 10 Pa and the temperature of 1300 DEG C, and therefore the high-purity chromium metal is formed.

Description

technical field [0001] The invention relates to the technical field of electric arc furnaces, in particular to a production method of high-purity metal chromium and a vacuum electric arc furnace used in the method. Background technique [0002] Metal chromium is an important industrial basic raw material, widely used in cemented carbide, superalloy, aluminum alloy, special alloy, welding rod, surface treatment, thermal spraying and other fields. Traditional metal chromium production processes mainly include: electrolysis, thermite, and carbon reduction. [0003] The electrolysis method is used to produce metal chromium flakes with high purity. Its advantage is that the purity is very high, up to 4 nines (99.99%). The products are used for the display treatment of superalloys and special materials in the fields of national defense and aerospace. The disadvantages are high energy consumption, high pollution, low current efficiency and high production cost. [0004] The alumi...

Claims

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Application Information

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IPC IPC(8): C22B34/32C22B9/04F27B3/08
CPCC22B9/04C22B34/32F27B3/085
Inventor 王昊胡晟劼
Owner LOUDI DAJIN NEW MATERIAL CO LTD
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