Method for continuous casting by using continuous casting dummy bar assembly and continuous casting dummy bar assembly

Abstract

The invention relates to a method for continuous casting by using a continuous casting dummy bar assembly. The continuous casting dummy bar assembly comprises a dummy bar hook, a baffle and a chill cage. When the continuous casting dummy bar assembly is used for performing continuous casting, a dummy bar head is firstly fed into a secondary cooling chamber, the lower end of the dummy bar hook and a cross bar are installed in an open slot of the dummy bar head, then the dummy bar head continuously enters a process required position of a dummy bar section of a mold copper pipe, an asbestos rope is used for blocking a gap between the dummy bar head and the mold copper pipe, a first iron shot layer is laid on the dummy bar head, the baffle penetrates through the first iron shot layer at the dummy bar head from a penetrating head at the upper end of the dummy bar hook, a second iron shot layer is laid on the baffle, the chill cage is put in the center of a dummy bar chamber formed by the dummy bar head and the mold copper pipe, and finally a certain quantity of deformed steel bars are inserted into the chill cage. Casting is started after the continuous casting dummy bar assembly is installed, molten steel forms a blank head which is connected with the dummy bar head and the continuous production of casting blanks is realized under the traction of a withdrawing and straightening machine.

Description

technical field [0001] The invention relates to the technical field of continuous casting steel, in particular to a sealing and starting ingot process before continuous casting, which is suitable for the production of continuous casting slabs with smaller specifications. Background technique [0002] Before the arc continuous casting machine casts steel, the dummy bar sends the dummy head to the position required by the dummy section of the mold copper tube in the crystallizer, and then uses asbestos rope and other materials to seal the gap between the dummy head and the copper tube , put the cooling material into the dummy cavity composed of the dummy head and the copper tube. When pouring, the molten steel quickly fills the copper tube. The cooling material in the dummy cavity accelerates the solidification of the molten steel, forming the connection between the billet head and the dummy head. Under the traction of the tension leveler, the continuous production of cast sla...

AI Technical Summary

Problems solved by technology

The problems of the above method are: the thin iron tube cannot be completely melted after pouring, and it is easy to scratch the inner wall of the copper tube of the crystallizer; the steel bar section will not be completely wrapped by the molten steel, and the shell of the primary billet is incomplete; there is crystallization from the billet head The thin iron tube behind the device is scattered, which is easy to scratch the foot roller or support roller of the crystallizer. In severe cases, it is stuck by the roller and cannot be pulled, resulting in production accidents.

Images