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Quantification method of blast furnace fuel compensation amount and H2 content in blast furnace gas

A technology of blast furnace gas and quantification method is applied in the field of quantification between the compensation amount of blast furnace fuel and the H2 content of blast furnace gas, which can solve the problems of complex heat utilization, complicated calculation, blast furnace consumption, etc., achieve significant economic and social benefits, reduce Fuel consumption, the effect of increasing production

Active Publication Date: 2020-09-22
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the water-gas reaction increases the H 2 H can be generated later as a reducing agent 2 Reduction reaction, part of the energy can be used, but there is still at least 50% H 2 cannot be utilized, so the blast furnace needs to consume more heat
In addition, H 2 There are many reactions involved in the reduction reaction, and the reactions that occur will change accordingly with different temperatures. The heat utilization is more complicated, and the calculation is cumbersome and inaccurate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0068] A certain 3200m 3 After 16 years of blast furnace production, water leakage often occurs in the blast furnace, and the blast furnace gas is normally H 2 The content is generally 3.2%, after water leakage, H 2 content rose from the normal 3.2% to 4.2%, ΔH 2 % = 1%. The heat of C in 1Kg of fuel is 27312KJ, H 2 The heat is 3388KJ. CO and H in blast furnace gas 2 The utilization rate is obtained from the furnace top gas composition analyzer, η H2 = η CO = 48%. Blast furnace air volume is 5700m 3 / min The output per minute is 5.70 tons. Blast furnace oxygen enrichment rate A is 5%, blast furnace blast N 2 The volume content is K=100%-21%-5%=74%, and N is brought into the furnace top gas by blast 2 It accounts for 50% of the furnace top gas volume. Blast furnace ton of iron H 2 The quantification of the fuel to be compensated for the content increase is as follows.

[0069] (1) Calculate 1m 3 H 2 Decomposition heat

[0070] Use H 2 The decomposition heat of ...

Embodiment example 2

[0092] A certain 4100m 3 After 11 years of blast furnace production, water leakage often occurs in the blast furnace, and the blast furnace gas is normally H 2 The content is generally 3.0%, after water leakage, H 2 Content increased from normal 3.0% to 3.8%, ΔH 2 % = 0.8%. C heat in 1Kg fuel is 27000KJ, H 2 The heat is 3600KJ. CO and H in blast furnace gas 2 The utilization rate is obtained from the top gas composition analyzer, ηH 2 =ηCO=50%. Blast furnace air volume is 7100m 3 / min The output per minute is 7.30 tons. Blast furnace oxygen enrichment rate A is 6%, blast furnace blast N 2 The volume content is K=100%-21%-6%=73%, and N is brought into the furnace top gas by blast 2 It accounts for 50.5% of the furnace top gas volume. Blast furnace ton of iron H 2 The quantification of the fuel to be compensated for the content increase is as follows.

[0093] (1) calculate thus 1m 3 H 2 Decomposition heat

[0094] Use H 2 The decomposition heat of O is used to ...

Embodiment example 3

[0117] A certain 2600m 3After 16 years of blast furnace production, water leakage often occurs in the blast furnace, and the blast furnace gas is normally H 2 The content is generally 3.5%, after water leakage, H 2 content rose from the normal 3.5% to 4.2%, ΔH 2 % = 0.7%. C heat in 1Kg fuel is 27102KJ, H 2 The heat is 3500KJ. CO and H in blast furnace gas 2 The utilization rate is obtained from the furnace top gas composition analyzer, η H2 = η CO = 46%. Blast furnace air volume is 5200m 3 / min The output per minute is 5.18 tons. The blast furnace oxygen enrichment rate is 5%, blast furnace blast N 2 The volume content is K=100%-21%-5%=74%, and N is brought into the furnace top gas by blast 2 It accounts for 51% of the furnace top gas volume. Blast furnace ton of iron H 2 The quantification of the fuel to be compensated for the content increase is as follows.

[0118] (1) calculate thus 1m 3 H 2 Decomposition heat

[0119] Use H 2 The decomposition heat of O ...

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Abstract

The invention discloses a quantification method of blast furnace fuel compensation amount and H2 content in blast furnace gas. The method comprises the four steps of firstly, calculating H2 decomposition heat of 1m3; secondly, calculating a fuel comprehensive heat value use rate; thirdly, calculating ton iron gas amount; and fourthly, according to heat balance, calculating the fuel compensation value. Data between the blast furnace fuel compensation amount and the H2 content in the blast furnace gas is subjected to quantification, according to related data, fuel is compensated for, a blast furnace is kept at the relatively stable heat state, and smelting stability, the yield of the blast furnace is increased, the fuel consumption is reduced, low carbon and environment friendliness are promoted, and the obvious economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting, and specifically refers to a blast furnace fuel compensation amount and blast furnace gas H 2 Quantification method between contents. Background technique [0002] The blast furnace is a shaft furnace-type counter-flow reactor with a volume ranging from hundreds to thousands of cubic meters, and the heat balance problems occurring in it are quite complicated. The blast furnace production process is carried out continuously, the top of the furnace is continuously loaded, and the iron hole below is continuously tapped. The raw materials added from the furnace top include sinter, pellets and lump ore. Blast furnace fuel includes solid coke fed from the top of the furnace and pulverized coal fed from the tuyeres. The charge of the blast furnace is affected by the high-temperature reducing gas that flows upstream. The reducing gas is generated by the air blown by the blower, heated b...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/001
Inventor 尹腾陈胜香彭浩李昕包岩朱义斌
Owner 武汉钢铁有限公司
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