Method and device for determining thickness change of slag crust of copper cooling wall of blast furnace

Abstract

The invention provides a method and a device for determining thickness change of slag crust of a copper cooling wall of a blast furnace. The method comprises steps of according to historical data of the blast furnace, determining a first difference value of an average temperature value of each segment of the copper cooling wall and the water charging temperature value of the cooling wall; determining an optimal control range of the first difference value, wherein the first difference value has the inversely proportional relationship with the thickness of the slag crust; calculating a second difference value of the average temperature value of each segment of the copper cooling wall and the water charging temperature value of the cooling wall; and comparing the second difference value with data in the optimal control range of the first difference value so as to obtain thickness change of the slag crust. In this way, when the thickness change of the slag crust is determined, the temperature of the cooling wall and the water charging temperature of the cooling wall are comprehensively considered, so the first difference value can be largely regarded as the temperature gradient from a temperature measurement point to the interior of a cooling water pipe. By using the difference value of the temperature to judge the thickness of the slag crust, judgment precision is improved, gas utilization rate is improved and fuel ratio is reduced, thereby improving stability of the furnace condition of the blast furnace.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a method and a device for determining the thickness variation of slag skin on a copper cooling wall of a blast furnace. Background technique [0002] Modern large-scale blast furnaces already have a high level of mechanization and automation, but due to the complexity of physical changes and chemical reactions inside the blast furnace, although a large number of detection devices such as thermocouples and furnace body pressure points are installed on the blast furnace body, the blast furnace still has no To get rid of the characteristics of "black box", the production of blast furnace still needs to rely on experience for smelting operation. [0003] The thickness of the slag skin on the hot surface of the blast furnace stave affects the stability of the blast furnace condition, the normal operation of the cooling equipment and the technical and econo...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for determining the change of the thickness of the slag skin of the copper cooling wall of the blast furnace, which is used to solve the problem in the prior art when judging the change of the thickness of the cooling copper wall of the blast furnace. Larger, leading to technical problems of unstable blast furnace conditions

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