Rotary hearth furnace and method for producing reduced metal

A technology of rotating hearth and metal, applied in the direction of hearth furnace, rotary drum furnace, furnace type, etc., can solve the problems of reducing the yield of reduced iron products, stopping the rotation of hearth 1, etc., to improve the yield and prevent low Strength problem, spallation prevention effect
CN1360061AInactive Publication Date: 2002-07-24KOBE STEEL LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KOBE STEEL LTD
Publication Date
2002-07-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

In a rotary hearth furnace for producing reduced metal through heating and reducing carbon containing materials composed of at least metal oxide-containing material and carbon-containing reduction material, a hearth structure is provided by which a refractory in a hearth lateral end is not damaged and carbon containing materials do not fall down to a water sealing section of the rotary hearth furnace. The upper part of a hearth lateral end (1a) is covered with the lower end (2a) of a side wall (2) of a hood covering the whole hearth, and a cooling means (3) is installed in the side wall lower end (2a).
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Description

technical field

[0001] The present invention relates to a rotary hearth type furnace, and in particular to the structure of the hearth, which produces reduced metals by heating and reducing carbonaceous raw materials consisting of at least metal oxide-containing materials and carbonaceous Restore material composition. Background technique

[0002] Recently, the production of steel products using electric arc furnaces has been active, and the demand for reduced iron is gradually increasing due to supply problems of iron filings as the main raw material for steel products or the need for high-quality steel produced by electric arc furnaces.

[0003] As one of the methods of producing reduced iron, a well-known method is to mix fine ore and coal raw materials such as pulverized coal or coke to form agglomerated raw materials such as pellets, which are charged into a rotary hearth type furnace and heated At high temperature, the iron oxide in the iron ore is reduced to obtain s...

Claims

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