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Slab continuous casting is a continuous casting steel iron technology with slab as its main product. The slab with width thickness ratio greater than 3 is called slab. Continuous casting and rolling steel slab is mainly used for rolling flat plate (thick plate, medium plate, thin plate and strip coil). Generally, the slab size cast by the continuous casting machine is 150-250mm thick and 1000-1800mm wide; The width of small slab can be 600mm and the thickness is 120mm. The slab with thickness less than 100mm is called thin slab.

The tundish with large capacity and high tank body is used for the protective casting of slab caster, which is conducive to the floating of inclusions on the one hand, and on the other hand, it can maintain a certain steel level during the continuous casting of ladle change to prevent the slag from being drawn into the mold to form internal defects, and at the same time, it can not reduce the casting speed;

Between the ladle and the tundish, and between the tundish and the crystallizer, refractory materials are used to isolate the steel flow from the air and prevent the secondary oxidation of the molten steel;

Continuously and uniformly add mold powder into the mold automatically;

The copper mould plate of slab caster is made of copper alloy plate containing silver, chromium, zirconium and other elements. This material CuCrZr not only has good thermal conductivity, but also improves the recrystallization temperature, and can maintain sufficient strength and hardness under high temperature conditions; The inner surface of the copper plate can also be coated with nickel and chromium to improve the wear resistance and prolong the service life of the mold;

The steel leakage prediction alarm of slab continuous casting mold is to install multiple thermocouples on the four copper plates to measure the temperature change, so that the prediction can be made according to the temperature change before the steel leakage to prevent the occurrence of steel leakage accident;

Automatic liquid level control. The steel level detection in the mold is mechanically interlocked with the opening and closing of the tundish nozzle to control and stabilize the steel level;

In the case of hot delivery, hot charging or direct rolling of slabs, in order to meet the requirements of a rolling unit for the combination of billet width, adjust the width of the mold, reduce the shutdown to improve the operation rate while meeting the change of billet width;

The mould vibration device adopts high frequency and small amplitude to improve the surface quality of casting slab