Method for determining furnace heat by using blast furnace slag iron heat index

Abstract

The invention relates to a method for determining furnace heat by using a blast furnace slag iron heat index, belongs to the technical field of blast furnace operation control, and solves the technical problem about making correct judgment on the furnace heat of a blast furnace. The method has the main principles that a slag-iron heat index capable of reflecting the heat states of slag and molteniron is solved by using a blast furnace high-temperature zone heat balance and carbon-oxygen balance equation, then a blast furnace heat storage index is constructed according to historical data, thetotal heat level in the furnace is determined, and a furnace heat index of the blast furnace is constructed by combining chemical heat and physical heat parameters of the blast furnace, then the furnace heat level of the blast furnace can be determined, and blast furnace heat judgment and adjustment are guided, so that the molten iron quality is improved, and the furnace condition is stabilized.

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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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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