A low-cost and long-life slab continuous casting tundish turbulator preparation method

Abstract

The invention relates to a preparation method of a low-cost long-service-life slab continuous casting tundish turbulence controller. The preparation method comprises the following steps of placing a bottom plate in a reserved space at the bottom of an inner cavity of a shell, positioning the bottom of a sleeve core on the bottom plate, overlapping the longitudinal center line of the sleeve core with the longitudinal center line of the inner cavity of the shell, forming a joint seam between the shell and the sleeve core, filling through sintered magnesia with the particle size smaller than or equal to 1 mm, coating the outer surface with a layer of regenerated magnesia carbon coating with the thickness of 25-35 mm, and performing natural curing for 1-2 days. The preparation method meets thedesign requirement of the internal mold with the special inner cavity shape, the problem that mass production is limited by the number of steel molds is solved, and the preparation period is shortened by 8-24 hours. The regenerated magnesia carbon castable and the regenerated magnesia carbon brick are adopted, the service life reaches 16-20 hours or above, the production cost is reduced by 40% orabove on year-on-year basis, and low cost and long service life are achieved.

Description

technical field [0001] The invention relates to a preparation method of a turbulence controller for a slab continuous casting tundish with low cost and high service life, and belongs to the technical field of continuous casting refractory materials. Background technique [0002] Installing a turbulence controller in the tundish of the continuous casting machine can change the running route of the molten steel in the tundish, prolong the residence time, and promote the floating and removal of inclusions, which plays an important role in improving the quality of the billet, and at the same time can slow down the flow of the ladle to the middle. The scouring of the impact zone of the working lining of the tundish improves the continuous pouring time of the tundish. In recent years, the production technology of turbulence controllers has developed towards metallurgical functionality, longevity, and low cost. However, the tundish turbulence controllers produced by the existing te...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of difficult processing and high cost of the tundish turbulence controller with complex inner cavity structure in the prior art, and provide a low-cost and high-life-span slab continuous casting tundish turbulence controller preparation method. The composite structure design of shell, sleeve core and bottom plate. The sleeve core is a kind of conical prefabricated part with special inner cavity shape based on the research and design of water mold experiment. It is a whole piece of regenerated magnesia carbon brick formed by isostatic pressing, which meets the performance requirements of metallurgical function, longevity and low cost, and solves the problem of the regeneration dryness of the inner core in the continuous casting tundish turbulence controller in the prior art. The key technical problems of poor quality stability, such as the problem of material collapse and the floating problem of waste magnesia carbon bricks used for masonry floors, have broad prospects for popularization and application

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