Blast Furnace Hearth Erosion Prediction Method for Multilayer Refractory Brick Furnace Wall Structure

Abstract

The invention relates to the field of inspection and maintenance of blast furnace multi-layer refractory bricks, in particular to a blast furnace hearth erosion prediction method. A blast furnace hearth erosion prediction method for a multi-layer refractory brick furnace wall structure. A group of thermocouples is selected, and a pair of thermocouples is selected from the group of thermocouples, and the value range corresponding to the erosion freezing point is calculated; and then The side wall of the hearth is layered, the deviation threshold condition is set, the temperature calculation value of each thermocouple in a group of thermocouples is back calculated, and the temperature calculation value is compared with the measured temperature value. When the comparison result meets the deviation threshold condition, that is This point is considered as the erosion freezing point; each group of thermocouples is calculated to obtain the erosion freezing point corresponding to each group of thermocouples, and all erosion freezing points are fitted to obtain the erosion freezing line. In the invention, the furnace wall of the blast furnace is layered according to the thermal conductivity, and the value interval is determined by the measured value of the thermocouple, thereby eliminating the error of manually setting the calculation interval and making the finally obtained erosion solidification line more accurate.

Description

technical field [0001] The invention relates to the field of inspection and maintenance of blast furnace multi-layer refractory bricks, in particular to a blast furnace hearth erosion prediction method. Background technique [0002] During the blast furnace production operation, the blast furnace hearth area plays a decisive role in the blast furnace life. In the blast furnace production process, the hearth area of ​​the blast furnace is always in the process of continuous erosion and solidification. Secondly, in order to pursue high production and low cost, the erosion of the hearth is often aggravated. With the development of erosion, the thickness of the side wall of the hearth will continue to become thinner. When the thickness of the side wall reaches the limit, the blast furnace will be shut down for overhaul, which also means the end of the lifetime of the blast furnace. If the erosion monitoring is inaccurate and corresponding countermeasures cannot be taken in time,...

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Problems solved by technology

[0018] (1) Since this type of problem is an ill-conditioned problem, the uniqueness of its solution, especially its stability, is usually not guaranteed

[0019] (2) A small error in the measurement data usually leads to a huge distortion of the solution

[0020] (3) The calculation intervals (A, B) given according to practical experience all need to be set manually, which is cumbersome and prone to calculation failure due to unreasonable setting intervals

[0021] The above method requires maintenance personnel to have rich experience, which undoubtedly increases the difficulty of model maintenance. Moreover, the initial calculation interval needs to be revised regularly. For some steel plants with poor technical conditions, this kind of revision work is more difficult, which affects When it comes to production safety, production accidents are prone to occur

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