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Blast furnace powder-spraying intensified smelting technology

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

Inactive Publication Date: 2005-12-28
YUNNAN METALLURGICAL GROUP
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  • Abstract
  • Description
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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 sprayed into the furnace with a spray gun for smelting. The pulverized coal, coke powder and powdery materials can be mixed with air separately and ...

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Abstract

The invention discloses a blast furnace powder spraying smelting method, which belongs to the technical field of blast furnace smelting non-ferrous metals, especially lead smelting. In the present invention, in the traditional smelting process, pulverized coal, coke powder and powdery materials are single or combined and mixed with air, and then sprayed into the blast furnace with a spray gun for smelting. Cheap pulverized coal, coke powder and powdery materials can be directly sprayed into the furnace for smelting, which can not only reduce the consumption of lump coke, but also reduce the cost of smelting; Sintering returns the powder to the sintering process, which greatly simplifies the material preparation process, improves the processing capacity of the sintering process, and makes full use of the advantages of the large specific surface area of ​​the powder to strengthen the 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 Patents(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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