Method for preparing high carbon ferro-chrome by fusible chrome fine ore

A technology of high-carbon ferrochrome and chromium powder, which is applied in the field of high-carbon ferrochrome and its preparation, can solve the problems of insufficient submerged arc furnace load, unstable slag and iron discharge, poor gas permeability of the material layer, etc., and achieve cold strength Good, save power consumption, good air permeability
CN106521148AInactive Publication Date: 2017-03-22BERIS ENG & RES CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BERIS ENG & RES CORP
Publication Date
2017-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing high carbon ferro-chrome by fusible chrome fine ore. The method comprises the following steps that screening is conducted, specifically, raw material chrome fine ore is screened, and chrome fine ore with the granularity being equal to or less than 6 mm and chrome fine ore with the granularity being larger than 6 mm are obtained; pelletizing is prepared, specifically, mixture is obtained after the granularity being equal to or less than 6 mm is evenly mixed with binder, and then the mixture is pressed into the pelletizing; burdening is conducted, specifically, the pelletizing, the chrome fine ore with the granularity being larger than 6 mm, flux and reducing agent are evenly mixed, and then mixture is obtained; and smelting is conducted, specifically, the mixture is placed into a submerged arc furnace to conduct smelting.
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Description

technical field

[0001] The invention relates to the field of metallurgy, in particular to a high-carbon ferrochromium and a preparation method thereof. Background technique

[0002] Chromium ore can be divided into two types according to particle size, namely chrome lump ore and chrome powder ore. Among them, fusible chromium powder ore has the following characteristics: small particle size, 90% of which are smaller than 10mm, and Cr in the ore 2 o 3 The content of Al is more than 40%. 2 o 3 The sum of the content of MgO and MgO is less than 30%. This type of chromium powder ore is easy to melt during smelting, and the primary slag is formed at a faster rate, which easily causes unreduced powder ore particles to quickly enter the slag layer, and more chromium escapes from the slag.

[0003] When the submerged arc furnace smelts fusible chromium powder ore, if the ingredients are not properly prepared, the following problems will occur: the load of the submerged arc furn...

Claims

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