Heat compensation method in coal gas blowing smelting process

A smelting process and heat compensation technology, applied in the field of gas injection smelting, can solve problems such as temperature drop in the swing zone, influence of blast furnace smelting conditions, unfavorable coke oven gas effective injection, etc. Effects of reduced reduction reaction and reduced melting loss reaction

Inactive Publication Date: 2019-11-22
JIUQUAN IRON & STEEL GRP
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Problems solved by technology

[0003] Aiming at the above technical problems, the present invention provides a thermal compensation method in the process of gas injection smelting, which can effectively solve the temperature drop in the swirl zone,

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  • Heat compensation method in coal gas blowing smelting process
  • Heat compensation method in coal gas blowing smelting process
  • Heat compensation method in coal gas blowing smelting process

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Embodiment Construction

[0012] A thermal compensation method in the smelting process of injecting gas, comprising the following steps:

[0013] (1) After the coke oven gas is processed by the fine desulfurization process, the coke oven gas is pressurized by a pressurizer to 100kPa higher than the hot air pressure, and then transported to the blast furnace through a pipeline;

[0014] (2) Spray the coke oven gas in the pipeline in step (1) into the blast furnace through the spray gun in the tuyere area of ​​the blast furnace, and participate in the reaction in the furnace together with the pulverized coal;

[0015] (3) Through the oxygen-enriched pipeline in the tuyere swirl area of ​​the blast furnace, increase the oxygen supply to increase the oxygen excess coefficient n to enhance the combustion of the combustion zone, thereby increasing the temperature in this area. Among them, the oxygen excess coefficient n satisfies the Formula n=1+2 / Kp, where 1gKp=-11792 / T+9.04, T is the absolute temperature. ...

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Abstract

The invention discloses a heat compensation method in a coal gas blowing smelting process. The method comprises the following steps that (1), after being pressurized to be at least 100 kPa higher thanhot air pressure by a pressurizing machine, coke oven gas is conveyed to a blast furnace through a pipeline; (2), in a blast furnace tuyere zone, the coke oven gas in the pipeline in the step (1) issprayed into the blast furnace through a spray gun, and the coke oven gas and pulverized coal together participate in a reaction in the furnace; and (3) the oxygen supply amount is increased through an oxygen enrichment pipeline in a blast furnace tuyere rotary zone, so that the oxygen excess coefficient n is increased, the combustion of a combustion zone is enhanced, and then the temperature of the zone is increased. According to the method, the problems that the temperature of the rotary zone is decreased, so that the temperature of molten iron, the heat supply of a furnace cylinder and thelike are changed, effective blowing of the coke oven gas is not facilitated, and working of the blast furnace during smelting is affected are effectively solved.

Description

technical field [0001] The invention relates to the technical field of gas injection smelting, in particular to a heat compensation method in the process of gas injection smelting. Background technique [0002] At present, in coal-injected blast furnaces, with the gradual increase of coke oven gas injection, the temperature in the tuyere swirl zone of the blast furnace is on a downward trend, and the resulting changes will inevitably change the temperature of molten iron and the heat supply of the hearth, which is not conducive to The effective injection of coke oven gas has a greater impact on the blast furnace smelting conditions. Contents of the invention [0003] Aiming at the above technical problems, the present invention provides a thermal compensation method in the process of gas injection smelting, which can effectively solve the temperature drop in the swirl zone, which causes changes in the temperature of molten iron and the heat supply of the hearth, which is n...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/001
Inventor 赵贵清谢绍玮徐世彪王世刚王昌文彭宁宁
Owner JIUQUAN IRON & STEEL GRP
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