Process for producing molten hot molten iron

A molten iron and process technology, applied in the field of metallurgy, can solve the problems of complex gas treatment process and high cost, and achieve the effect of reducing the amount of coke used and the cost of molten iron

Inactive Publication Date: 2010-06-09
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process is feasible, but it has the following disadvantages: ① Sponge iron is a solid state, and it is used as a raw material for producing high-quality steel in electric furnaces
③ The coal gas treatment process for processing the high-temperature reducing gas produced by the coal gasifier (such as the shell process) into a qualified reducing gas that meets the requirements of the direct reduction shaft furnace process is extremely complicated and costly
[0007] b. The FINEX process still uses lump coal or pulverized coal briquettes

Method used

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  • Process for producing molten hot molten iron
  • Process for producing molten hot molten iron

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Embodiment Construction

[0016] Embodiment is further described below in conjunction with accompanying drawing:

[0017] Lump ore / pellet 3, limestone / dolomite 4 and coke 5 from the raw material yard are added from the top of blast furnace 1. A blast furnace 1 is connected to a coal gasifier 2 . Coal gasifier 2 uses non-coking pulverized coal (~800kg / t iron) 13 and oxygen (~450m 3 / t iron) 14 to produce high-temperature reducing gas (1200-1700°C, containing dust, containing H 2 S) The reducing gas pipeline is directly blown into the blast furnace 1 through the blast furnace tuyere 18, and the amount of high-temperature reducing gas is about 1600m 3 / t Iron.

[0018] Blow a small amount of oxygen into the tuyere (~100m 3 / t iron) 29, the temperature of the high-temperature reducing gas is raised to (~2100°C). The high-temperature reducing gas moves upwards in the furnace to heat the falling charge added to the top of blast furnace 1 and reduce iron oxides. Only a small amount of coke or non-coking...

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Abstract

The invention belongs to the technical field of metallurgy, and in particular relates to a process for producing hot molten iron. The process comprises the following steps: directly blowing high-temperature reducing gas generated by a coal gasifier from a tuyere of a hearth of a blast furnace, feeding lump ore / pellet, limestone / dolomite and coke of a stock yard from a roof of the blast furnace, performing purification treatment on blast-furnace gas conducted out from the blast furnace roof through a roof coal dry-method dust catcher, and discharging molten iron and slag through an iron port. A product output by the process is high-quality hot molten iron, water slag and high-quality blast-furnace gas. The blast furnace has no a pulverized coal blowing system and no hot blast furnace system, has a violent reducing atmosphere turning region caused by the tuyere part of the blast furnace, and has no emission of dust, waste liquid and exhaust gas. The process can be widely applied to the production of the hot molten iron.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a process for producing hot metal. Background technique [0002] The main body of modern ironmaking, blast furnace ironmaking, can be said to have reached its peak in terms of theory and technology, and has reached a very perfect level. However, the blast furnace ironmaking method has disadvantages such as the need to use coke, long process, large investment, and serious environmental pollution. [0003] my country's energy consumption is dominated by coal, accounting for roughly 70% of the total energy consumption. Although coal resources are abundant (the proven recoverable amount is more than 600 billion tons), coking coal accounts for only 6%, and the distribution is uneven (coking coal resources in Shanxi Province account for more than 50%). Therefore, it is obviously unrealistic for the development of my country's ironmaking production to be entirely based on the massi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCY02P10/20
Inventor 彭华国邹忠平陈映明张昭贵杨艳郭隆
Owner CISDI ENG CO LTD
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