A control method of radial ore-coke ratio in blast furnace material distribution process

Abstract

The invention provides a method for controlling the radial ore to coke ratio in a blast furnace burden distribution process. The method comprises the following steps that: a blast furnace burden parameter and a blast furnace body equipment parameter are collected; the function relationship between each control parameter in the blast furnace burden distribution process and the current formed burden distribution burden level is built; the function relationship between the current formed burden distribution burden level and the burden distribution burden level after the burden level reduction is built; a blast furnace burden distribution process control model is built and is used for describing the relationship between a blast furnace burden distribution radial ore to coke ratio curve and each control parameter; the optimum control parameter is determined by using the blast furnace burden distribution process control model, and the current blast furnace burden distribution process is controlled in real time; and when the error of the radial ore to coke ratio curve in the real-time control process of the current blast furnace burden distribution process is greater than an error allowable value, the blast furnace burden distribution process control model is rebuilt, and otherwise, the current blast furnace burden distribution process is completed according to the current ore to coke ratio curve. The method provided by the invention has the advantages that the real-time burden level shape can be provided, so that operators can be effectively guided for improving a charging system, modifying a burden distribution matrix and regulating the furnace burden distribution.

Description

technical field [0001] The invention belongs to the technical field of process control in the metallurgical industry, and in particular relates to a method for controlling the radial ore-coke ratio in a blast furnace material distribution process. Background technique [0002] Blast furnace material distribution has always been one of the core technical issues in ironmaking production practice. The distribution of charge in the furnace includes the shape of the formed material surface, material layer thickness, particle size distribution, ore-coke ratio distribution and mixed layer distribution. Whether the charge distribution is reasonable or not? The relative movement of the charge and gas in the furnace, the reduction process, the heat transfer process, and even the forward motion of the blast furnace all have a great influence. [0003] During the whole blast furnace material distribution process, the charge mainly goes through the following main links: the charge in the...

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Problems solved by technology

[0004] However, in the process control of the blast furnace material distribution, there are two problems: 1) Since the blast furnace is a high-temperature, high-pressure, closed metallurgical reactor, when the blast furnace is in production, the operator cannot directly observe the distribution of the material distribution and material layer in the furnace , so that it is impossible to use the adjustment means on the upper part of the blast furnace to adjust timely and accurately; 2) In many cases, especially when the furnace condition is not smooth, the blast furnace operator needs to adjust the charge attribute data and material distribution control parameters in time to control the shape of the material surface. In order to achieve the goal of smooth furnace conditions, but in the current practical application, blast furnace operators often make adjustments based on experience, and have not formed a complete set of optimized control systems

[0005] A numerical simulation method of blast furnace material distribution based on intelligent algorithm proposed by Beijing Shougang Automation (application number: 201210055516.9) proposes the numerical simulation problem of material layer distribution in the furnace throat area. , this method has a large deviation from the actual position far away from the furnace throat area, and there is insufficient calculation of the shape of the material layer formed by the charging method in some special periods of furnace conditions; Cheng Shusen of Beijing University of Science and Technology proposed a method based on optical grids Three-dimensional material surface display (new technology of bellless blast furnace material distribution test and three-dimensional image reconstruction of material surface) cannot give the shape of other multi-layer material surfaces from the furnace throat to the upper part of the furnace body

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