Furnace temperature control method for coping with fluctuation of blast furnace gas utilization rate

A control method, blast furnace gas technology, applied in blast furnaces, blast furnace details, energy efficiency improvement, etc., can solve the problems affecting the quality of molten iron and the inability to effectively control the furnace temperature, and achieve the effect of ensuring the quality of molten iron and keeping the furnace temperature stable

Inactive Publication Date: 2020-04-21
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

Adjusting the fuel ratio according to the traditional method cannot effectively control the furnace temperature and affect the quality of molten iron

Method used

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  • Furnace temperature control method for coping with fluctuation of blast furnace gas utilization rate
  • Furnace temperature control method for coping with fluctuation of blast furnace gas utilization rate

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Embodiment example

[0045] Under three different working conditions, adjust according to the method that the embodiment of the present invention provides, and concrete furnace condition is as shown in Table 2:

[0046] Table II

[0047]

[0048] It can be seen from the data in Table 2 that when the furnace temperature control method provided by the embodiment of the present invention is adopted, when the gas utilization rate fluctuates greatly, the furnace temperature changes before and after the fluctuation are small, thereby making the difference of silicon content in molten iron small. For example, if the fuel ratio is adjusted according to the prior art, when the blast furnace gas utilization rate is reduced from 48% to 40%, the furnace temperature will decrease by 0.32%; if the fuel ratio is adjusted using the method provided by the embodiment of the present invention, when the blast furnace gas utilization When the efficiency is reduced from 49% to 41%, the furnace temperature decreases ...

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Abstract

The invention discloses a furnace temperature control method for coping with fluctuation of a blast furnace gas utilization rate. The furnace temperature control method comprises the following steps of acquiring a ton iron fuel ratio before fluctuation of the gas utilization rate, a carbon monoxide utilization rate before fluctuation and a carbon monoxide utilization rate after fluctuation; acquiring a fuel ratio control value by using the following formula FR = FR<1> + ((eta CO) <2>-(eta CO) <1>) x (0.0034 (eta CO) <2><2>-0.4177 (eta CO) <2> + 17.192), wherein in the formula, FR represents the fuel ratio control value, FR<1> represents a ton iron fuel ratio before fluctuation of a gas utilization rate, (eta CO) <1> represents the carbon monoxide utilization rate before fluctuation, and (eta CO) <2> represents the carbon monoxide utilization rate after fluctuation; and adjusting the blast furnace fuel ratio according to the fuel ratio control value. According to the furnace temperaturecontrol method for coping with the fluctuation of the blast furnace gas utilization rate, the fuel ratio control value after the fluctuation of the blast furnace gas utilization rate is quantified. When the furnace condition fluctuates and the gas utilization rate changes greatly, the fuel ratio control value can be quickly determined, the blast furnace fuel ratio is adjusted to keep the furnacetemperature stable, and the molten iron quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a furnace temperature control method for coping with fluctuations in the utilization rate of blast furnace gas. Background technique [0002] The change of blast furnace gas utilization rate is one of the important evaluation bases to reflect the change of blast furnace thermal regime. Large fluctuations in time often cause large changes in the temperature of the blast furnace, affecting the quality of molten iron. When the gas utilization rate changes greatly in the daily production operation of the blast furnace, it is necessary to adjust the fuel ratio of the blast furnace in time to realize the stability of the blast furnace temperature, ensure the smooth running of the blast furnace, and ensure the quality of molten iron, which plays a positive role in the production and operation of the blast furnace. [0003] At present, when the blast furnace gas utilizati...

Claims

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Application Information

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IPC IPC(8): C21B5/06
CPCC21B5/006C21B5/06C21B2300/00Y02P10/25
Inventor 巩黎伟李昊堃宋建忠李夯为赵新民郑伟王晓冰陈树文梁建华唐顺兵
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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