A system for suppressing crystallizer liquid level fluctuations at high lifting speeds

Abstract

The invention discloses a lifting type system for inhibiting fluctuating of liquid level of a crystallizer at high drawing speed, and belongs to the technical field of optimizing of crystallizer technology. The lifting type system comprises a main unit and a lifting unit, wherein the side surface of a flow collector is provided with a flow collecting opening which is communicated with the flow collector, and a flow blocking plate is arranged in the flow collector; a flow separator is in an oblong shape, a plurality of through holes are formed in the upper part of the flow separator and are distributed from the center to the two sides, and the sizes of the through holes are successively increased; a flow outlet is connected with the flow separator through a hanging column, and the flow separator is connected with the lifting unit through a large hanging column; wheels are arranged at the two ends of a lifting vehicle, and are matched with vertical steel rails; a pulley is arranged at the top part of each steel rail, one end of a steel cable bypasses each pulley and is connected with the lifting vehicle, and the other end of each steel cable is connected with a rotary shaft of a lifting motor. The system has the advantages that the fluctuating of the liquid level of the crystallizer can be inhibited at the high drawing speed, the flow which is sprayed out of a side hole of an immersing type water opening is maximally collected at the flow collecting opening, and the nonuniformity of the amount of discharged liquid steel on the water opening of the flow separator is effectively inhibited.

Description

technical field [0001] The invention relates to the technical field of crystallizer process optimization, and more specifically relates to a system for suppressing crystallizer liquid level fluctuations at high lifting speeds. Background technique [0002] During the production process of the continuous casting process, molten steel enters the mold from the tundish through the submerged nozzle. When the casting speed is high, there will be large liquid level fluctuations in the crystallizer. This is because at the same mold width, the casting speed increases, and the speed and flow rate of the stream outlet side hole increase, and the stream stream The impact force on the narrow surface of the crystallizer increases, resulting in an increase in the strength of the upper reflux of the stream, and an increase in the shear force between the upper reflux area and the slag surface, resulting in fluctuations in the liquid level of the entire mold to varying degrees, among which th...

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Problems solved by technology

(2) When the self-eliminating metal plate is fed into the molten steel, its melting is not from top to bottom, and the part that is in direct contact with the jet from the side hole of the submerged nozzle will melt first, forming a hole, so It will be difficult to calculate the feeding speed of the self-contained metal plate. In order to ensure the "balance of payments" between the molten steel and the slab in the mold, the casting speed of the slab will also be difficult to determine

However, the device for suppressing crystallizer liquid level fluctuations under the high pulling speed also has the following technical defects: (1), in the actual production process, it is found that the jet angles and jet velocities of the jets ejected from the side holes of the submerged nozzle often vary widely. Therefore, the gathering port often cannot timely and effectively gather the jets ejected from the side holes of the submerged nozzle, and most of the jets do not enter the device for suppressing the fluctuation of the crystallizer liquid level, resulting in a poor effect of suppressing the fluctuation of the crystallizer liquid level; (2 ), in the actual production process, it is found that the distribution of molten steel flowing out of the nozzle of the diverter on the diverter is very uneven, resulting in uneven impact on the mold slag, which is not conducive to suppressing the fluctuation of the liquid level of the crystallizer

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