A method of placing cold slugs to increase the condensation speed and strength of continuous casting pouring slabs

Abstract

The invention relates to a cold charge distribution method for improving the condensation speed and strength of a continuous casting cast-on head blank. The method comprises assembling, gap filling and material distribution. Before pouring starts during continuous casting, a dummy bar head is conveyed into a crystallizer in a penetrating manner, and a flow blockage material is used for sealing a gap between the dummy bar head and a crystallizer wide face copper plate; after filling is finished, spiral cold charges are flatly laid to the dummy bar head, and three layers of spiral cold charges are evenly arranged on two narrow faces of the crystallizer in the width direction; and two layers of spiral cold charges are evenly arranged on the inner arc of the dummy bar head in the length direction, and two layers of spiral cold charges are evenly arranged at the outer arc dovetail groove position of the dummy bar head in the length direction. According to the cold charge distribution method, impact force on the dummy bar head flow blockage material from molten steel can be greatly reduced, the condensation speed of molten steel at the dummy bar head is increased, and the bonding strength and the tight degree between the blank head and a dummy bar head dovetail groove can be effectively improved; and it is ensured that the condensed molten steel reaches the high strength within shorttime before the emerging time, and a cast blank can be safely output of the crystallizer and a fan-shaped section.

Description

technical field [0001] The invention relates to the technical field of continuous casting machine pouring technology, and more specifically refers to a method for distributing cold material for improving the condensation speed and strength of continuous casting pouring blanks. Background technique [0002] Before casting, the slab continuous casting machine needs to pass the dummy head into the crystallizer, and use paper, asbestos rope, iron filings and other blocking materials to control the gap between the dummy head and the wide copper plate of the mold. The gap is sealed. When pouring starts, the molten steel is continuously injected into the crystallizer. Under the action of the cold material at the head of the dummy and the cooling system of the mold, the injected molten steel contacts the head of the dummy and fills the head of the dummy. The molten steel in contact with the head of the ingot will quickly condense and condense into one body with the dovetail groove ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for distributing cold material to improve the condensation speed and strength of continuous casting pouring billets, so as to solve the problem of insufficient strength of condensed steel billets that will directly wash away flow-blocking materials when molten steel is injected in actual production and contact dummy heads before emergence Or not fully solidified, resulting in problems such as breakout or premature detachment of the dummy ingot when the slab continuous caster starts to output the slab