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Method of manufacturing low carbon sponge iron using microwave vertical furnace

A technology of carbon sponge and sponge iron, applied in the direction of shaft furnace, furnace, furnace type, etc., can solve the problems of many impurities, complicated process flow, serious environmental pollution of coking agglomeration, etc.

Inactive Publication Date: 2006-01-25
TAIYUAN UNIV OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The blast furnace ironmaking method itself also has many technical deficiencies, such as: high dependence on massive iron-containing ore and coke, serious environmental pollution in the coking and agglomeration process, complicated process flow, low purity of iron, high carbon content, impurities Many, seriously restricting the development of blast furnace ironmaking process

Method used

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  • Method of manufacturing low carbon sponge iron using microwave vertical furnace
  • Method of manufacturing low carbon sponge iron using microwave vertical furnace
  • Method of manufacturing low carbon sponge iron using microwave vertical furnace

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Experimental program
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Effect test

Embodiment 1

[0094] Microwave shaft furnace, cooling box and magnetic separator are in quasi-working state;

[0095] Select 72.5 kg of iron ore powder, 20 kg of coal powder and 7.5 kg of lime powder according to the combination ratio;

[0096] The iron ore powder, coal powder and lime powder selected for the matching ratio are finely ground respectively, and sieved with 150 mesh, 80 mesh and 100 mesh screens respectively;

[0097] The fine powder after fine grinding and sieving is mixed according to the proportion and stirred evenly;

[0098] Turn on the microwave shaft furnace microwave generator 3, microwave heater 2, and microwave regulator 4. When preheating to 300°C, open the sealing cover 6, and distribute the materials loosely in layers from the hopper 5 into the furnace cavity 14;

[0099] Close the sealing cover 6, and the furnace cavity 14 is in a fully closed state;

[0100] Microwave heater 2, microwave generator 3, and microwave regulator 4 control and heat up, and when the ...

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Abstract

The invention relates to a method to make low carbon sponge iron by microwave shaft furnace. It adopts iron ore powder as raw material, common soft coal dust or anthracite dust as reducer to gain high quality low carbon sponge. It uses the feature that the iron ore powder, carbon powder, and lime powder has selective absorbing to microwave. Under the condition of sealing and high temperature, and under the effect of microwave generator, heater, and adjustor, it would take carbon heat self-reduction by absorbing the heat produced by microwave generator to gain low carbon sponge iron. The method has simple technology, shortens the reduction time period, saves coking coal and coke resource, and reduces environment pollution. The degree of metallization could reach 90-98%, and the carbon content could be lower than 0.5%. It is the ideal method to make low carbon sponge iron.

Description

technical field [0001] The invention relates to a method for preparing low-carbon sponge iron by using a microwave shaft furnace, belonging to the technical field of sponge iron smelting and preparation methods in iron and steel metallurgy. Background technique [0002] Blast furnace ironmaking is the most economical way to produce iron. It has a history of nearly 400 years. It uses iron ore as raw material and coke made of coking coal as smelting energy and reducing agent. It has been used for nearly a hundred years. This ironmaking technology. [0003] In the process of blast furnace ironmaking, a large amount of coke will be consumed, and the coking coal used to make coke accounts for only 5% of the total reserves of coal resources in the world. Coking coal is the best among coal varieties, and its combustion performance and burning heat are both Very superior, with the development of modern industry, the demand for iron will increase significantly, so coking coal coke w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02C21B13/14
Inventor 陈津任瑞刚刘浏周渝生刘金营
Owner TAIYUAN UNIV OF TECH
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