High-temperature gas injection-based iron-making technology

A gas and high temperature technology, applied in blast furnaces, blast furnace details, reducing gas emissions, etc., can solve the problems of large emissions, low productivity, serious environmental pollution, etc., and achieve the effect of improving blast furnace productivity, reducing ironmaking costs, and reducing prices.
CN104131122AInactive Publication Date: 2014-11-05UNIV OF SCI & TECH BEIJING
5 Cites 32 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2014-11-05
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a high-temperature gas injection-based iron-making technology and belongs to the field of black metallurgy. The high-temperature gas injection-based iron-making technology utilizes oxygen-rich normal-temperature air blasting to replace hot air operation, and high-temperature gas produced by a coal gasification device and CO2-free furnace top recycled gas are mixed and are respectively pumped into a blast furnace from the furnace body and the hearth so that furnace top recycled gas CO2 removal is realized. The high-temperature gas injection-based iron-making technology has a coal ratio of 240-350kg / tHM, a coal gasification unit coal-use amount of 50-250kg / tHM and a coke ratio of 180-260kg / tHM and a blast furnace capacity factor of 6.0-7.5, reduces operation costs of oxygen-containing blast furnace top gas CO2 removal and recycled gas pre-heating to a temperature of 900-1300 DEG C, realizes coke reduction and coal use increasing in blast furnace production, improves an iron-making technology energy structure and stabilizes gas balance of a steel enterprise.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of ferrous metallurgy, relates to an ironmaking process based on injection of high-temperature gas, and is suitable for blast furnace ironmaking processes. Background technique

[0002] At present, 90% of the pig iron in the world is produced by the traditional blast furnace ironmaking process. In the traditional blast furnace ironmaking process, the main fuel is coke and coal powder. The tuyeres inject hot air and coal powder. The traditional blast furnace ironmaking process requires the use of a large amount of coke, and coking not only requires a large amount of coking coal, but also produces a large amount of toxic and harmful substances during the coking process, which seriously pollutes the environment; the traditional blast furnace blast brings in a large amount of high-temperature inert gas N 2 , so that the proportion of CO in the furnace gas is less than 40%, and the degree of indirect reduction of iron ore...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More