Blast furnace powder-spraying intensified smelting technology

A technology of blast furnace and technology, which is applied in the field of lead smelting, can solve the problems of reduced efficiency and complex processing procedures, and achieve the effects of reducing smelting costs, simplifying material preparation procedures, and improving utilization rates

Inactive Publication Date: 2003-02-05
YUNNAN METALLURGICAL GROUP
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  • Abstract
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AI Technical Summary

Problems solved by technology

As a result, the pre-smelting treatment process is complicated or the efficiency is reduced

Method used

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Embodiment Construction

[0008] The present invention is further set forth below by embodiment.

[0009] Lump coke with a particle size of 30-100 mm, massive lead-containing materials (sintered agglomerate, lead oxide-rich lump ore, massive lead oxide slag) and flux are added to the furnace in batches in the order of coke → lead-containing material → flux. During the smelting process, the materials in the furnace gradually move down from top to bottom, and the reducing gas produced by the coke combustion in the tuyere area of ​​the blast furnace flows from bottom to top. Chemically, lead compounds are gradually reduced until complete metallurgical reactions are complete. During the blast furnace smelting process, pulverized coal, coke powder and powdery materials with a particle size of less than 2mm are mixed with ordinary air or oxygen-enriched air, and then sprayed into the furnace from the tuyere area of ​​the blast furnace with a spray gun for smelting. Pulverized coal, coke powder, and powdery ...

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Abstract

In the traditional smelting process said invention can mix one of powdered coal, coke powder and powder material or their composite with air, then uses spray gun to spray them into blast furnace for smelting. Said invention can greatly simplify material preparation procedure, can raise treatment capacity of its sintering procedure, and can fully utilize the superiority of powder material with large specific surface area so as to intensity smelting process.

Description

Technical field [0001] The invention belongs to the technical field of blast furnace smelting nonferrous metals, especially lead smelting. Background technique [0002] The blast furnace has the characteristics of large unit production capacity, strong raw material adaptability, high thermal efficiency, low cost, small footprint, etc., coupled with the rich experience accumulated in long-term production and continuous technical improvement, this traditional smelting equipment and process technology has become an important part of smelting The field of lead is widely used. Lead agglomerates, lead oxide lumps, lead oxide rich lumps, and lead-containing slag (containing 10-60% lead) produced by other oxidation smelting processes can all be reduced and smelted in a blast furnace. At present, 80% of the crude lead produced in the world is Restored in a blast furnace. When dealing with lead concentrates, the traditional lead smelting process is to sinter the concentrates for des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02F27B1/20F27D3/18
Inventor 董英王吉坤周廷熙王旭明赵修明马翔陶学虎
Owner YUNNAN METALLURGICAL GROUP
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