Steady flow distribution device for dual-roller thin band continuous casting

Abstract

The invention relates to a steady-flow delivery device used in twin-roll strip continuous casting production process, which belongs to twin-roll strip continuous casting process technology field. The invention mainly comprises a delivery device with delivery holes and a submerged nozzle; the whole exterior shape of the delivery device is a scaphiform and the cross section is of ''V'' shape with the bottom being a arc. The delivery device is immerged in the steel water in the melting pool. The delivery device is provided with a plurality of delivery holes, including end delivery holes, side delivery holes and bottom delivery holes. A cavity is arranged inside the delivery device which is provided with a cover board on the top half, and a rectangular slot bore is arranged on the cover board, the middle of the delivery device is provided with two steady-flow chamber which is formed by two retaining walls to inhibit turbulent flow; the steel water flows out from the lower end of the submerged nozzle to the steady-flow chamber with retaining walls firstly and then flows out through the retaining walls of the chamber to the cavity space on the both sides and then flows out through a plurality of delivery holes to the melting pool between the twin-roll. The device can stabilize the turbulent flow and the liquid surface, thus leading to the even temperature of the steel liquid in the melting pool and facilitating operation.

Description

technical field [0001] The patent of the invention relates to a steady flow distribution device used in the production process of twin-roll thin strip continuous casting thin steel strip, which belongs to the technical field of twin-roll thin strip continuous casting. Background technique [0002] The twin-roll thin strip continuous casting distribution device is in a very important position in the entire thin strip production. Many countries have launched a lot of research in this regard, such as the distributors disclosed in US Patent Nos. 6,073,680, 5,857,514, 6,125,917, and 6,012,508. Located below the tundish, shaped like a small tundish. The molten steel flowing in from the tundish flows into the flow distributor through a row of flow holes in the distributor. The flow distributors described in Chinese Patent Nos. 01276402.7 and 02283420.6 are integral hoisting equipment, and the purpose of flow distribution is achieved through flow distribution holes at both ends and...

AI Technical Summary

Problems solved by technology

[0003] The main problem with traditional distributors or flow distributors in the past is that there is no internal device to suppress or reduce the turbulent flow and the impact force of the stream during the flow of molten steel, which causes the flow of molten steel to be unstable, which in turn leads to Fluctuation of the liquid level intensifies, and the temperature inside the molten pool is uneven; in addition, crusts are easy to form on the inner and outer walls of the flow distributor, and if the crusts fall off, the continuous casting process is likely to be abnormal and affect the quality of the strip steel

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