Control method for blast furnace top material distribution

Abstract

A control method for blast furnace top material distribution comprises the following steps that 1) the material distribution period of an initial charging system and the material distribution period of a final charging system are set, and the switching step length of the material distribution periods is set; 2) material distribution parameters of an initial charging system and a final charging system are set; 3) the blast furnace conducts circulating material distribution according to the initial charging system and the final charging system in sequence, and the furnace condition of the blast furnace is judged, specifically, if the furnace condition is not stable, material distribution parameters or material distribution periods of all the charging systems are adjusted; and if the furnace condition is stable, the material distribution period of the initial charging system is reduced once according to the switching step length of the material distribution period, and the material distribution period of the final charging system is increased once according to the switching step length of the material distribution period; and 4) the step 3) is repeated until the material distribution period of the initial charging system is zero.

Description

technical field [0001] The invention relates to the field of automatic control of ironmaking blast furnaces, in particular to a control method for top material distribution of blast furnaces. Background technique [0002] Charging system One of the four major systems of blast furnace operation, mainly adjusts the distribution of charge in the furnace through the charging sequence, charging method, material line height, batch weight, coke load, material distribution method, and changes in the tilting angle of the distribution chute. In order to achieve the purpose of reasonable distribution of gas flow, it is an important means of blast furnace operation. It plays a key role in ensuring the stability of furnace conditions and the reasonable distribution and utilization of gas flow. Because of its convenient and flexible adjustment, it is also a change in daily adjustment. One of the more adjusted operating regimes. [0003] In order to maximize the smelting efficiency, moder...

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Problems solved by technology

[0005] The benchmark for adjusting the charging system is to ensure a smooth transition of the furnace condition in the new environment without large fluctuations. However, in daily operation, some blast furnaces often transition from the initial charging system to the final charging system. The edge of the charging system is heavier, and the edge of the other charging system is lighter. If it is comprehensively loaded into the furnace according to the specified cycle, the gas distribution in the furnace may be more unstable, so that the furnace condition is difficult to stabilize, which seriously affects production. The existing technology Unable to fine-tune the charging regime, which may result in excessive or frequent adjustments

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