Preparation method for metallurgical exothermic agent for continuous casting tail billet collection

Abstract

The invention discloses a preparation method for a metallurgical exothermic agent for continuous casting tail billet collection, and belongs to the technical field of metallurgical continuous casting.The preparation method comprises the following steps of preparing aluminum powder, carbon powder, iron powder, silicon powder, FeO and CaO in percentage by weight, and uniformly stirring and mixing the aluminum powder, the carbon powder, the iron powder, the silicon powder, the FeO and the CaO by using a stirrer; then adding a binder into the mixture, and then continuously and uniformly stirringand mixing the mixture by using the stirrer; conveying the stirred raw materials to a forming machine to make the stirred raw materials be pressed into agglomerates; and finally, drying the prepared agglomerates and naturally cooling the agglomerates to obtain the metallurgical exothermic agent. According to the preparation method, the metallurgy exothermic agent prepared through the method is added into a mould, carbon and aluminum in the metallurgy exothermic agent and FeO generate an exothermic reaction, then the relatively high heat can be provided for a tail billet when the continuous cast tail billet is solidified, the solidification rate of a tail billet shell is reduced, meanwhile, the generated metal Fe can feed a solidification shrinkage cavity in the center of the tail billet, the density of the tail billet is increased, the quality of the tail billet is improved, the quality of the tail end of a cast billet is greatly improved, and therefore the cutting amount of the tail end of the continuous cast billet is reduced.

Description

Technical field [0001] The invention relates to the technical field of metallurgical continuous casting, and more specifically, to a method for preparing a metallurgical heating agent for continuous casting finishing billets. Background technique [0002] The molten steel is poured by the continuous casting machine to form a continuous casting billet. When the pouring is about to end, a finishing billet is required, and the equipment on the head of the continuous casting machine is successively closed to prepare for the next casting. In the prior art, after the completion of the casting of the tundish, as the drawing progresses, the liquid level drops and the tail blank is pulled out of the crystallizer. During the entire finishing process, due to the spray effect of the secondary cold water, the top of the tail blank The liquid surface quickly cools down and forms a solidified shell. It is worth noting that the secondary cold water falls on the solidified shell and gathers, res...

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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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