Carbothermal Reduction Method Using Melt Waste Heat

A technology of waste heat and melt, applied in furnaces, furnace types, fluidized bed furnaces, etc., can solve the problems of unusable powder materials, achieve full utilization, save pelletizing costs, and reduce energy consumption

Active Publication Date: 2018-08-21
HONGYANG METALLURGICAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a method for carbothermal reduction using the waste heat of the melt, which can make full use of the waste heat of the product obtained from the reduction reaction, and solve the problem that the powder cannot be used, thereby reducing energy consumption. Maximize the use of resources while consuming

Method used

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  • Carbothermal Reduction Method Using Melt Waste Heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Lime and semi-coke are mixed and formed for reduction reaction to obtain liquid calcium carbide (high-temperature melt, temperature is 2100 degrees Celsius), and then the lime powder and semi-coke powder obtained after drying and grinding (the average particle size of the two is 5μm~30μm) are mixed according to the mixing ratio of lime and semi-coke to obtain mixed powder. The bottom feeding method is used to spread the mixed powder at the bottom of the container, and then add liquid calcium carbide to make the lime and semi-coke in the mixed powder. The residual heat of the liquid calcium carbide undergoes a reduction reaction to obtain calcium carbide products. The mass of the mixed powder accounts for 5% of the mass of the liquid calcium carbide. After the reaction is completed, the calcium carbide product is taken out and cooled slowly in the air, and the bottom sample is taken for gas generation measurement. , the result is 302L / kg, the calcium carbide product is a su...

Embodiment 2

[0038] Lime and coke are mixed and molded and subjected to reduction reaction to obtain liquid calcium carbide (high-temperature melt at a temperature of 2000 degrees Celsius), and then dry and grind the obtained lime powder and coke powder (the average particle size of the two is less than 74 Micron (accounting for 80%)) are mixed according to the mixing ratio of lime and coke to obtain a mixed powder. The bottom feeding method is used to spread the mixed powder at the bottom of the container, and then add liquid calcium carbide, so that the lime and coke in the mixed powder can be used The residual heat of the liquid calcium carbide undergoes a reduction reaction to obtain calcium carbide products. The mass of the mixed powder accounts for 10% of the mass of the liquid calcium carbide. After the reaction is completed, the calcium carbide product is taken out and cooled slowly in the air, and the bottom sample is taken for gas generation measurement. , the result is 297L / kg, c...

Embodiment 3

[0040] Mix lime and anthracite and carry out reduction reaction to obtain liquid calcium carbide (high-temperature melt, temperature 2200 degrees Celsius), and then dry and grind the obtained lime powder and anthracite powder (the average particle size of the two is less than 74 The micron accounts for 80%) according to the mixing ratio of lime and anthracite to obtain mixed powder. The powder injection method is used to inject the mixed powder while discharging the liquid calcium carbide, so that the lime and anthracite in the mixed powder can be used in liquid state. The residual heat of calcium carbide undergoes a reduction reaction, wherein the mass of the mixed powder is 20% of the mass of the liquid calcium carbide. After the reaction is completed, the calcium carbide product is taken out and cooled slowly in the air, and the bottom sample is taken for gas generation measurement. The result is 284L / kg, calcium carbide products are first-class products.

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Abstract

The invention discloses a method of performing carbon thermal reduction by use of the waste heat of melt. The method comprises the following steps: (1) mixing and molding carbon raw materials and mineral raw materials and performing reduction reaction to obtain the high temperature melt; (2) mixing the carbon raw material powder and the mineral raw material powder to obtain the mixed powder; (3) contacting the mixed powder and the high temperature melt, and therefore, the mixed powder can utilize the waste heat of the high temperature melt to perform reduction reaction to obtain reduzate. The waste heat of reduzate obtained by the reduction reaction is fully utilized, and the problem that the powder cannot be utilized is solved, the energy consumption is reduced, and the resource is utilized to the maximum extent.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, in particular, the invention relates to a method for carbothermal reduction using waste heat of melt. Background technique [0002] In the field of metallurgy and chemical industry, judging from the existing industrial mature or immature production processes, the obtaining of many semi-finished products or final products basically requires a high-temperature reduction process. After a certain period of high-temperature reduction process, the semi-finished or final product is often discharged in the form of a liquid melt, and after entering a container or mold, it is slowly cooled to form a certain shape. The temperature of liquid products is mostly above 1000°C or even above 2000°C, and they carry a lot of physical heat. However, the heat is not effectively used during the cooling process, resulting in a waste of energy. Assuming that this large amount of waste heat is utilized, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/10C21B13/00
Inventor 吴道洪任中山薛逊曹志成
Owner HONGYANG METALLURGICAL ENG TECH CO LTD
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