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Melting reduction device and method

A reduction furnace, melting and gasification furnace technology, applied in the field of smelting reduction devices, can solve problems such as large lump ore structure

Active Publication Date: 2012-06-27
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The COREX device has the disadvantages of having to use lump ore and lump coal and having a huge structure

Method used

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  • Melting reduction device and method
  • Melting reduction device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Said: the charge (fine ore, limestone powder, dolomite powder) from the raw material yard is dried by the dryer 15 and the iron-containing fine ore and powdered flux with a particle size of 0-8mm are passed through the first feeding belt 6 and the second feeding The belt 6'feeds the first fluidized bed device 2 and the second fluidized bed device 2'. The first fluidized bed device 2 is divided into four stages of R4, R3, R2, and R1 fluidized beds, and the second fluidized bed device 2'is divided into four stages of R4, R3, R2, and R1 fluidized beds.

[0029] After drying, the iron-containing fines and powdered flux with a particle size of 0-8mm are loaded into the fluidized bed R4 through the top charging device 7 of the first reduction furnace, and the iron-containing fines in the fluidized bed are produced by the melter gasifier 1 The reduction gas is reduced step by step, and the iron-bearing powder ore is reduced to sponge iron through the fluidized b...

Embodiment 2

[0034] Embodiment 2: The difference from embodiment 1 is that there is no first heater 14 and second heater 14' in the pipeline 13, so in the implementation process, only need to adjust the ratio of cold and hot gas, you can directly get 850 ℃ mixed gas without heater.

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Abstract

The invention discloses a melting reduction device and a melting reduction method. The melting reduction method comprises the following steps of: respectively reducing furnace charge through a first fluidized bed device and a second fluidized bed device, and outputting respective sponge iron and coal gas; pressing the sponge iron output from the first fluidized bed device, charging in a melting gasification furnace to prepare molten iron, and simultaneously obtaining melting gasification furnace derived coal gas; pressing the sponge iron output from the second fluidized bed device and feedinginto a blast furnace; making the top coal gas output from the first fluidized bed device and the second fluidized bed device pass through a dust removal system and a CO2 removal system to obtain coldreduction coal gas; and pressurizing the cold reduction coal gas, mixing with the melting gasification furnace derived coal gas, and filling the mixed gas into the first fluidized bed device and the second fluidized bed device for reduction reaction respectively. The melting reduction method and the melting reduction device can produce hot molten iron, also can produce the sponge iron in an amount equal to that of the molten iron, do not output the coal gas, and can balance the coal gas amount per se as much as possible in the technology so as to reduce the fuel consumption to the greatest degree.

Description

Technical field [0001] The invention relates to a smelting reduction device and method. Background technique [0002] Smelting reduction technology is one of several cutting-edge high-tech in the iron and steel industry. It is a new process for producing hot molten iron from coal and ore. Because this law has the characteristics of not using or using less coke, good environmental protection, low energy consumption, low investment, and strong adaptability, it has attracted the attention of countries all over the world. According to statistics, there have been 35 kinds of smelting reduction methods, 13 of which are more competitive. Only a few smelting reduction processes such as COREX, FINEX, FINMET and HIsmelt have industrial production scale. But so far, only COREX and FINEX ironmaking methods have been put into industrial-scale production. The COREX method of ironmaking uses lump ore, pellets or sinter as iron-bearing charge, and directly uses lump coal as energy. The pre-r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00
CPCY02P10/122
Inventor 宋华陈凌彭华国李佳楣郭敏张涛
Owner CISDI ENG CO LTD