A kind of preparation method of metallurgical exothermic agent for continuous casting end billet

Abstract

The invention discloses a preparation method of a metallurgical exothermic agent for continuous casting end billets, belonging to the technical field of metallurgical continuous casting. In the present invention, aluminum powder, carbon powder, iron powder, silicon powder, FeO and CaO are configured according to weight percentage, and are stirred and mixed by a mixer; a binder is added therein, and then the mixer is continued to be stirred. Mix well; send the stirred raw materials to a molding machine to be pressed into agglomerates; finally, the agglomerates are dried and cooled naturally to obtain a metallurgical exothermic agent. In the present invention, the metallurgical exothermic agent prepared by the method is added to the crystallizer, and the carbon and aluminum in the metallurgical exothermic agent undergo an exothermic reaction with FeO, so as to provide higher heat for the tail billet when the continuous casting tail billet is solidified, and reduce the energy consumption. The solidification rate of the tail billet shell, and the metal Fe generated at the same time will feed the solidification shrinkage hole in the center of the tail billet, increase the density of the tail billet, improve the quality of the tail billet, and greatly improve the quality of the tail end of the billet, thereby reducing the The cutting amount of the tail end of the continuous casting billet.

Description

technical field [0001] The invention relates to the technical field of metallurgical continuous casting, and more particularly to a method for preparing a metallurgical exothermic agent for continuous casting end blanks. Background technique [0002] After the molten steel is poured by the continuous casting machine, the continuous casting billet is formed. When the pouring is about to end, the finishing billet work needs to be carried out. The equipment on the head of the continuous casting machine is closed one after another, and preparations are made for the next casting. In the prior art, after the tundish is poured, the liquid level drops as the drawing progresses, and the tail blank is pulled out of the crystallizer. The liquid surface cools rapidly and forms a solidified shell. It is worth noting that the secondary cold water falls on the solidification shell and accumulates, which produces a strong cooling effect, so that the tail blank not only transfers heat in th...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of quality defect of casting slab in the prior art when continuous casting finish billet, and provide a preparation method of metallurgical exothermic agent for continuous casting finish billet. The carbon and aluminum in the metallurgical exothermic agent react exothermicly with the FeO in the tail billet, which can provide higher heat for the tail billet when the continuous casting tail billet solidifies, and reduce the solidification rate of the tail billet shell , the metal Fe produced at the same time will instead feed the solidified shrinkage cavity in the center of the tail billet, increase the density of the tail billet, improve the quality of the tail billet, and greatly improve the quality of the tail end of the cast billet, thereby reducing the removal amount of the tail end of the continuous casting billet

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