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 coke ratio in the blast furnace distribution process, which includes collecting blast furnace charge parameters and blast furnace body equipment parameters; establishing the functional relationship between each control parameter in the blast furnace distribution process and the currently formed distribution surface; establishing the currently formed distribution surface. The functional relationship between the distribution surface and the distribution surface after the material surface drops; establish a blast furnace distribution process control model to describe the relationship between the blast furnace distribution radial ore coke ratio curve and various control parameters; use the blast furnace distribution process The control model determines the optimal control parameters and controls the current blast furnace distribution process in real time; when the error of the radial ore coke ratio curve in the current real-time control process of the blast furnace distribution process is greater than the error allowable value, the blast furnace distribution process control model is re-established, otherwise Complete the current blast furnace distribution process according to the current radial ore-to-coke ratio curve. The invention can provide real-time material surface shape, effectively guide operators to improve the charging system, correct the distribution matrix, and adjust the distribution of the furnace material.

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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