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Method for producing ferroalloy

A technology of ferrochrome alloy and reducing agent, which is applied in the direction of improvement of process efficiency, furnace type, furnace, etc., and can solve problems such as increasing the silicon content of ferrochrome alloy

Inactive Publication Date: 2003-06-25
マックスレッド (プロプライエタリー) リミテッド
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to reduce the amount of carbon reducing agent used to increase chromium recovery, this must be paid for by increasing the silicon content of ferrochrome

Method used

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Embodiment Construction

[0026] Description of the preferred embodiment

[0027] It is first classified or differentiated according to the type of ore of the material to be melted and the slag properties such as alkalinity or the liquidus temperature of the slag. The amount of reducing agent used, and the relative amounts of carbide and carbon reducing agent (when used in combination), are affected by the type and nature of the material being melted.

[0028] In one form of the invention, silicon carbide is formed relative to the desired SiO in the slag 2 The stoichiometric ratio of the contents was used. The carbon content in the form of coke is reduced, for example, by adding an equivalent amount of SiC. Due to the stoichiometric addition of SiO in the slag required for the formation of SiC 2 content, for example, would completely eliminate SiO in the form of quartzite or quartz sand 2 The join needs.

[0029] In another form of the invention, with reference to the required SiO in the slag 2 c...

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Abstract

A ferrochrome alloy is produced from an ore or concentrate by smelting the ore or concentrate in the presence of a reductant which is a carbide alone or a carbide in combination with another reductant. The carbide is preferably silicon carbide.

Description

field of invention [0001] The invention relates to a production method of ferroalloy, in particular to a production method of ferrochrome alloy. Background of the invention [0002] Ferrochromium is produced by melting chromium ore or concentrate in the presence of one or more fluxes and a carbon reducing agent in a DC furnace or an AC submerged arc furnace. Most chromium and iron together with some silicon and carbon present in the metallic phase are known as ferrochrome. In all known processes, however, significant amounts of chromium are present in the slag phase. It has been reported in the literature that most of the chromium lost in the slag during ferrochrome production is in the form of unreacted or partially reacted chromium ore. [0003] The reducing agent for molten chrome ore or concentrate is carbon in the form of coke, coal, charcoal, anthracite, and the like. Although it is possible to reduce the amount of carbon reducing agent used to increase chromium rec...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21C5/52C22B5/06C22B34/32
CPCC22B34/32C21C5/5264C22B5/06Y02P10/20C22B34/30
Inventor 奥尔汗·杰米尔
Owner マックスレッド (プロプライエタリー) リミテッド
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