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Ironmaking method based on top gas cyclic utilization

A gas and gas pipeline technology, applied in the field of ironmaking based on the recycling of top gas, can solve the problems of underutilization, high carbon emissions, and high content of reducing gases, so as to improve reduction efficiency, reduce carbon emissions, and reduce energy consumption. consumption effect

Inactive Publication Date: 2018-11-02
XINJIANG BAYI IRON & STEEL
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  • Abstract
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Problems solved by technology

The content of reducing gas in the top gas is high, it is not fully utilized, and the carbon emission is high

Method used

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  • Ironmaking method based on top gas cyclic utilization

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Embodiment Construction

[0021] An ironmaking method based on top gas recycling, such as figure 1 As shown, the process steps are: after the top coal gas is dedusted by the fine dust collector, only 10% of the top coal gas enters the output gas system 1, and 90% of the top coal gas enters the gas pressurizer system 2 after cooling down, and a part of the top coal gas after pressurization is sprayed. Into the vault area 3 of the gasifier, in the space of 1050°C in the vault area of ​​the gasifier, due to the presence of a large amount of carbon powder, the carbon dioxide in the shaft furnace top gas reacts with the carbon powder to form carbon monoxide, which enters the gas pipeline as produced gas 5. Another part of the top gas after pressurization enters the generating gas pipeline 4 directly as cold gas to realize the adjustment of the temperature of the generating gas, and realizes the reutilization of the top gas in such a cycle.

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Abstract

The invention discloses an ironmaking method based on top gas cyclic utilization. The ironmaking method comprises the processing steps that after top gas is dedusted by a fine dust collector, only 10%of the top gas enters an output gas system, 90% of the top gas enters a gas pressurization system after being cooled, a part of the pressurized top gas is injected into the vault area of a gasifier,a large amount of carbon powder exists in the space at 1050 DEG C in the vault area of the gasifier, carbon dioxide in the top gas of a shaft furnace reacts with the carbon powder to generate carbon monoxide as generating gas to enter a generating gas pipeline, and the other part of the pressurized top gas is used as cold gas to directly enter the generating gas pipeline, so that the temperature of the generating gas is adjusted.

Description

technical field [0001] The invention relates to an ironmaking method based on top gas recycling. Background technique [0002] The Ouye furnace ironmaking process is the largest non-blast furnace ironmaking process in the world today, which can directly use non-coking coal to produce molten iron, breaking through the dependence of traditional blast furnace ironmaking on coking coal resources. its SO 2 , benzene, ammonia, phenol, nitrogen oxides and other emission indicators are superior to those of blast furnaces, and the pollution is much lower than that of blast furnace processes. It has incomparable advantages in environmental protection with blast furnaces. The gas system of Ouyeel Furnace is composed of generated gas, reduced gas and excess gas system. The generated gas enters the reduced gas pipeline after cooling down and enters the shaft furnace as reduced gas. The excess gas enters the gas pipe network after passing through the remaining gas pipeline, while the sha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/02
CPCC21B11/02Y02P10/20
Inventor 田宝山袁万能邹庆峰
Owner XINJIANG BAYI IRON & STEEL
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