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Device for preheating and pre-reducing iron-containing material

A material and reduction furnace technology, applied in the field of metallurgy, can solve the problem of low pre-reduction ratio of mineral powder, and achieve the effect of solving the problem of gas permeability of material layer, stable operation and low operation and maintenance cost.

Pending Publication Date: 2020-05-12
BEIJING SHOUGANG INT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device for preheating and pre-reducing iron-containing materials, which solves the problem that the pre-reduction ratio of ore powder is not high

Method used

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  • Device for preheating and pre-reducing iron-containing material
  • Device for preheating and pre-reducing iron-containing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A device for preheating and pre-reducing iron-containing materials, mainly including a smelting reduction furnace 1, a gasification hood 2, a reduction chamber 3, a drying chamber 4, a chain plate machine 5, a main rotating shaft 6 and an auxiliary transmission shaft 8; The gas outlet of the furnace 1 communicates with the air inlet of the gasification hood 2, the gas outlet of the gasification hood 2 communicates with the air inlet of the reduction chamber 3, and the gas outlet of the reduction chamber 3 communicates with the air inlet of the drying chamber 4 , the air outlet of the drying chamber 4 is connected with the dust removal system; the drying chamber 4 is connected with the reduction chamber 3; There is a main transmission shaft 6, and the chain plate machine 5 is driven by the main transmission shaft 6 to perform circular motion; an auxiliary transmission shaft 8 is arranged between the two main transmission shafts 6, and the auxiliary transmission shaft 8 ha...

Embodiment 2

[0032] A device for preheating and pre-reducing iron-containing materials, mainly including a smelting reduction furnace 1, a gasification hood 2, a reduction chamber 3, a drying chamber 4, a chain plate machine 5, a main rotating shaft 6 and an auxiliary transmission shaft 8; The gas outlet of the furnace 1 communicates with the air inlet of the gasification hood 2, the gas outlet of the gasification hood 2 communicates with the air inlet of the reduction chamber 3, and the gas outlet of the reduction chamber 3 communicates with the air inlet of the drying chamber 4 , the air outlet of the drying chamber 4 is connected with the dust removal system; the drying chamber 4 is connected with the reduction chamber 3; There is a main transmission shaft 6, and the chain plate machine 5 is driven by the main transmission shaft 6 to perform circular motion; an auxiliary transmission shaft 8 is arranged between the two main transmission shafts 6, and the auxiliary transmission shaft 8 ha...

Embodiment 3

[0038] A device for preheating and pre-reducing iron-containing materials, mainly including a smelting reduction furnace 1, a gasification hood 2, a reduction chamber 3, a drying chamber 4, a chain plate machine 5, a main rotating shaft 6 and an auxiliary transmission shaft 8; The gas outlet of the furnace 1 communicates with the air inlet of the gasification hood 2, the gas outlet of the gasification hood 2 communicates with the air inlet of the reduction chamber 3, and the gas outlet of the reduction chamber 3 communicates with the air inlet of the drying chamber 4 , the air outlet of the drying chamber 4 is connected with the dust removal system; the drying chamber 4 is connected with the reduction chamber 3; There is a main transmission shaft 6, and the chain plate machine 5 is driven by the main transmission shaft 6 to perform circular motion; an auxiliary transmission shaft 8 is arranged between the two main transmission shafts 6, and the auxiliary transmission shaft 8 ha...

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Abstract

The invention discloses a device for preheating and pre-reducing an iron-containing material, and belongs to the technical field of metallurgy. The device comprises a smelting reduction furnace, a gasification smoke hood, a reduction chamber, a drying chamber, a chain plate machine, main rotating shafts and an auxiliary transmission shaft, wherein the drying chamber communicates with the reductionchamber; a feeding hole of the drying chamber is connected with a discharging hole of the reduction chamber through the chain plate machine; the main transmission shafts are arranged at the two endsof the chain plate machine; and the auxiliary transmission shaft is arranged between the two main transmission shafts. High-temperature coal gas generated by the smelting reduction furnace is cooled,enters the reduction chamber through a flue, and is subjected to reduction reaction with dried pellets; smoke subjected to reduction heat exchange enters the drying chamber; after the dried smoke is subjected to dust removal through a dust removal system, clean coal gas is combusted for power generation or is merged into a coal gas pipe network. The device has the advantages that the occupied areais small, the equipment is simple, the coal gas of the smelting reduction furnace is fully utilized, and the heat utilization efficiency of a system is improved by over 20 percent; the iron-containing material is preheated to over 800 DEG C, the reduction degree is 30 to 80 percent, preheating and pre-reduction of the iron-containing material are realized, and the productivity is improved by over25 percent.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a device for preheating and prereducing iron-containing materials. Background technique [0002] The iron and steel industry is a national pillar industry, but also a large energy consumer. The current mainstream blast furnace ironmaking process must go through raw and fuel pretreatment processes such as coking, sintering and pelletizing, resulting in serious air and water pollution. With the continuous reduction of coking coal resources, it is imminent to develop a non-blast furnace ironmaking production process that directly uses non-coking coal and iron ore powder. [0003] The HIsmelt smelting reduction ironmaking process directly uses raw materials such as non-coking coal and iron ore powder. The ore powder with a particle size of <6mm is preheated and pre-reduced by a preheater and sprayed into the smelting reduction furnace through a spray gun. The oxides are reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C22B1/24C22B1/02
CPCC21B13/0006C22B1/2406C22B1/02
Inventor 闫方兴曹朝真孟玉杰梅丛华毛庆武章启夫李勇
Owner BEIJING SHOUGANG INT ENG TECH