Ferrochromium fine ore sintering technology

A technology of ferrochrome powder and chromite powder, which is applied in the field of sintering process of chromite powder ore, can solve the problems of increasing the steps of sintering process, high energy consumption of grinding equipment, and increasing process cost, etc., so as to improve the utilization factor, sintering The effect of reducing consumption and improving yield

Active Publication Date: 2015-11-25
BERIS ENG & RES CORP
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Problems solved by technology

The pellets produced by the two are suitable for smelting in closed electric furnaces, but both pelletizing methods require that the powder mass fraction of ferrochrome powder ore with a grinding particle size of ≤0.074mm (200 mesh) is ~80%, so the process equipment includes Large grinding equipment, the grinding equipment consumes a lot of energy
In addition, the two processes of pre-reduction pelletization and oxidation pelletization are complicated, and compared with the sintering method, the invest

Method used

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  • Ferrochromium fine ore sintering technology
  • Ferrochromium fine ore sintering technology

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Embodiment Construction

[0016] In order to better understand the sintering process of ferrochrome fine ore in the present invention, a specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings and actual working conditions.

[0017] The following are the different results of one kind of ferrochrome fine ore under different sintering processes:

[0018] The taste of a certain ferrochrome powder ore is 42%Cr 2 o 3 , Moisture content 2 h), the yield rate was 67%.

[0019] Adopt sintering process of the present invention, concrete steps are as follows:

[0020] Firstly, the raw materials are sieved to obtain a fine powder with a particle size of -0.125mm (accounting for 20%), and the remaining raw materials are used as coarse powder.

[0021] Then, mix the fine powder, coke powder and binder, wherein the coke powder particle size is less than 0.2mm, and mix them evenly in the wheel mill. While mixing the raw meal, add water to moisten ...

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Abstract

The invention provides a ferrochromium fine ore sintering technology. The work process includes the steps that coarse powder and fine powder are screened, cold pressing is carried out on the fine powder to obtain balls, the coarse powder is mixed, then, the coarse powder and the fine powder are mixed to be jointly sintered and screened, and the oxygen enrichment sintering technology is adopted. After the sintering technology method is adopted, ferrochromium fine ore does not need to be finely ground. Compared with a pelletizing method, the technological process is simple, and according to the scheme, the overall water consumption is small, and the sintering burnup is correspondingly reduced; and the sintering capacity and sinter yield are increased.

Description

technical field [0001] The invention relates to a sintering process in the technical field of ferroalloy smelting, in particular to a sintering process of ferrochrome powder ore. Background technique [0002] Chromite is an important raw material for the production of high carbon ferrochrome from ferroalloys. At present, lump ore in chromite ore accounts for about 20%, powder ore (<8mm) accounts for about 80%, and it is relatively cheap. [0003] When the closed electric furnace is used to smelt ferrochrome fine ore, it is necessary to pretreat the ferrochrome fine ore, otherwise the air permeability of the electric furnace will be deteriorated, the furnace condition will be deteriorated, the energy consumption will be increased, and the operation safety of the electric furnace will be threatened. At present, the pretreatment technologies for ferrochrome powder ore suitable for closed electric furnace smelting mainly include sintering method and pellet roasting method. ...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 王惠永吕韬李谦
Owner BERIS ENG & RES CORP
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