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A Method of Determining Furnace Heat Using Heat Index of Blast Furnace Slag and Iron

A technology of blast furnace slag and index, which is applied in blast furnaces, blast furnace details, steel manufacturing processes, etc., can solve problems such as fluctuations in blast furnace conditions, difficulty in mastering, and difficulty in furnace heat control, so as to improve the degree of furnace heat control and stabilize the furnace condition, the effect of improving the quality of molten iron

Active Publication Date: 2022-04-12
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

[0002] For blast furnace operation, controlling the appropriate furnace heat level is the focus and difficulty of blast furnace operation. If the furnace heat level is too high or too low, it will not only cause fluctuations in blast furnace conditions, but also adversely affect blast furnace production technical indicators and molten iron quality.
Since the blast furnace production process is a complex high-temperature reaction process, there are many parameters affecting the blast furnace heat, and there is a strong correlation between each parameter, and the blast furnace heat change has a long time lag, which affects the furnace heat. control brings difficulty
[0003] At present, the furnace heat control methods at home and abroad mainly include: autoregressive vector model, Shuijiang model, Wu model, Ec index model, GO-STOP model, neural network model, etc. The problems existing in these models are: the control based on the calculation of the principle of blast furnace smelting The concept put forward by the model is complex, and it is difficult for on-site blast furnace operators to grasp; the model based on data reasoning is too dependent on historical data reasoning, and the practicability is poor when the operating parameters change greatly

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  • A Method of Determining Furnace Heat Using Heat Index of Blast Furnace Slag and Iron
  • A Method of Determining Furnace Heat Using Heat Index of Blast Furnace Slag and Iron
  • A Method of Determining Furnace Heat Using Heat Index of Blast Furnace Slag and Iron

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Embodiment Construction

[0071] The specific embodiment of the present invention is further described below by way of example.

[0072] A method for determining the heat level of the furnace by using the heat index of blast furnace slag and iron, comprising the following steps:

[0073] Step 1: Calculate the validity of the parameters

[0074] (1) Collection of furnace thermal parameters

[0075] This paper adopts the parameters of the company's 6# blast furnace under actual production conditions in a certain period of 2020, as shown in Table 1:

[0076] Table 1 Blast furnace operating parameters

[0077]

[0078]

[0079] (2) into the furnace every minute O 2 Volume (Nm 3 / min)

[0080]

[0081] Where: f is the air percentage humidity, %;H 空气 is air humidity, g / m 3 ;V 风机 is the air volume of the fan, Nm 3 / min; V 喷煤 is the coal injection air volume, Nm3 / min; λ 富氧 O in enriched oxygen 2 The mass percentage, %; V 富氧 is the oxygen-enriched flow rate, Nm 3 / h; H 加湿 is the humidi...

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Abstract

The invention relates to a method for determining furnace heat by using the heat index of blast furnace slag and iron, which belongs to the technical field of blast furnace operation control and solves the technical problem of making correct judgment on the blast furnace heat. The main principle of the present invention is: use the heat balance and carbon-oxygen balance equations in the high temperature zone of the blast furnace to solve the heat index of slag and iron that can reflect the thermal state of slag and molten iron, and then construct the heat storage index of the blast furnace according to historical data to determine the overall heat in the furnace Combined with the chemical heat and physical heat parameters of the blast furnace, the furnace heat index of the blast furnace is constructed, so that the furnace heat level of the blast furnace can be determined, and then the furnace heat judgment and adjustment of the blast furnace can be guided to improve the quality of molten iron and stabilize the furnace condition.

Description

technical field [0001] The invention belongs to the technical field of blast furnace operation control, and in particular relates to a method for determining furnace heat by using the heat index of blast furnace slag and iron. Background technique [0002] For blast furnace operation, controlling the appropriate furnace heat level is the focus and difficulty of blast furnace operation. Too high or too low furnace heat level will not only cause fluctuations in blast furnace conditions, but also adversely affect blast furnace production technical indicators and molten iron quality. Since the blast furnace production process is a complex high-temperature reaction process, there are many parameters affecting the blast furnace heat, and there is a strong correlation between each parameter, and the blast furnace heat change has a long time lag, which affects the furnace heat. Control brings difficulty. [0003] At present, the furnace heat control methods at home and abroad mainl...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/00C21B5/008C21B2300/04
Inventor 李壮年李宝峰陈树文武树永
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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