Tapping flow control method and system for full-automatic converter tapping

Abstract

The invention discloses a tapping flow control method for full-automatic converter tapping. The method comprises the following steps that (1) the weight G 1 of molten steel in a converter is obtainedthrough calculation; (2) the initial angle Theta 0 of the converter when tapping starts is set based on the weight of the molten steel in the converter, and target tapping flow Q<aim> (t) is set; (3)when the tapping starts, actual tapping flow Q<real> (t) is compared with the target tapping flow the Q<aim> (t) in real time, if the Q<real> (t) is larger than or equal to the Q<aim> (t), the inclination of the converter is reduced, and if the Q<real> (t) is smaller than the Q<aim> (t), the inclination angle of the converter is increased; and in the tapping process, the walking displacement amount xt of a ladle trolley is controlled at the same time, so that the ladle trolley is always located at an impact point of tapping steel flow; and (4) when the condition that the tapping is finished isdetected, the is stopped and the converter is lifted. In addition, the invention further discloses a tapping flow control system for full-automatic converter tapping.

Description

technical field [0001] The invention relates to a method and system for automatic steelmaking in a converter, in particular to a method and system for fully automatic steel tapping in a converter. Background technique [0002] At present, major steel mills around the world basically have automatic converter smelting, which can effectively improve the success rate of steelmaking, shorten the smelting cycle, improve output and quality, reduce raw material consumption and cost, and greatly reduce the labor intensity of workers. However, although the automatic steelmaking of the converter has been relatively popular in the prior art, the tapping of the converter is generally carried out manually. [0003] Usually converter tapping includes the following steps: [0004] 1) Determine that the composition and temperature of the molten steel end point meet the tapping requirements; [0005] 2) After driving the ladle car to the position of accepting molten steel; [0006] 3) The ...

AI Technical Summary

Problems solved by technology

[0012] (1) Since the shaking furnace is operated by workers, the operating strength and angle are completely controlled manually. Therefore, the situation that the shaking furnace is too strong may cause slag overflow at the furnace mouth, or the shaking furnace is too slow to cause the slag layer to pass through the tap hole. Long, the amount of slag is large; and for the angle of the shaking furnace, due to the artificial control of the angle, there will be a large change in the static pressure of the molten steel during tapping, and there will be obvious fluctuations in the tapping time;

[0013] (2) Since the position of the mobile ladle trolley is judged by manual observation and experience in step 2, there may be a phenomenon of molten steel overflow due to improper operation

However, the tapping process of the converter automatic tapping control method is not controlled by a mathematical model

Images