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Metal ferrochromium preparing method by computer-controlled double microwave ovens

A computer and metal chromium technology, which is applied in the field of preparing metal ferrochromium in microwave double furnaces, can solve the problems of imperfect preparation process, low yield, failure to achieve programming and automation, etc.

Inactive Publication Date: 2006-09-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although some researches and experiments have been done on the microwave heating one-carbon reduction method to refine metal ferrochromium, most of them are not ideal, the preparation process is not perfect, the metallization rate is not high, the yield rate is low, and it has not reached programming and automation. For example, microwave generation Control, smelting temperature limit, constant temperature holding time limit, carbon monoxide gas pre-reduction, nitrogen protection cooling, flux, reducing agent ratio, etc. are still under study.

Method used

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  • Metal ferrochromium preparing method by computer-controlled double microwave ovens
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  • Metal ferrochromium preparing method by computer-controlled double microwave ovens

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Experimental program
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Effect test

Embodiment 1

[0102] All production equipment is in ready working condition;

[0103] Featured and weighed 70 parts by weight of chromite powder, 17 parts by weight of pulverized coal, and 10 parts by weight of lime powder;

[0104] Crush, finely grind, and sieve the fine powder of raw materials to control the fineness, the mesh number of the screen is 200 mesh, and the particle size of each raw material powder is <0.074mm;

[0105] Mix well;

[0106] Open the left and right furnace body to loosen the material naturally;

[0107] Close the left and right furnaces, preheat the left and right furnaces to 1000°C±50°C, preheat for 10min±5min, computer controls the microwave heating temperature, and pre-reduces carbon monoxide;

[0108] Refined products: the computer controller controls the temperature of the left and right furnaces to 1300°C±50°C, keeps the temperature at a constant temperature for 20min±5min, chemical reaction, refining metal ferrochrome;

[0109] Open the left and right fu...

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Abstract

The invention relates the method for preparing chrome metal with microwave double wave controlled by computer. The method comprises the following steps: controlling purity of raw material, disintegrating, fine grinding, screening, mixing material, stirring, distributing, preheating furnace body, high temperature refining, nitrogen protection, cooling, purifying, and getting the high purity chrome metal whose purity is 95%, the chromium content being 63-75%, nitrogen content being 24-36%, using chromite powder as raw material, using common as reducing agent, using lime powder as fusing agent, using nitrogen as protective gas, adopting computer to control microwave double wave, using temperature probe to intake furnace body temperature information, using computer to control double furnace body smelting conversion, using microwave to heat, using LCD to display, fault alarming, and realizing the information, procedure and automation. The method has the advantages of high efficiency, short process flow and non environmental pollution.

Description

technical field [0001] The invention relates to a method for producing metal ferrochrome by using computer-controlled microwave double furnaces, which belongs to the technical field of ferrous metal and iron and steel smelting. Background technique [0002] Metal ferrochrome is the main raw material for special steelmaking, such as stainless steel, bearing steel, high-strength structural steel, tool steel, high-speed steel, etc., all of which use metal ferrochrome as the main raw material, which can change the internal structure of steel, Preventing the intervention of oxygen atoms is an essential metal element for alloy tool steel, alloy structural steel, stainless steel, bearing steel and other special steels. Metal ferrochrome occupies a very important position in the steelmaking industry. [0003] At present, most of the refining of ferrochromium metal adopts the electric furnace refining method, using massive chromite ore as raw material and coke as reducing agent to re...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B5/10B02C23/08B03C1/02
Inventor 陈津林原生刘金营周渝生王社斌林万明
Owner TAIYUAN UNIV OF TECH
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