What u need to know about Continuous casting mold?1. The design principle of the inner cavity shape of the mold copper tube of the high-efficiency billet conti

 What u need to know about Continuous casting mold?

1. The design principle of the inner cavity shape of the mold copper tube of the high-efficiency billet continuous caster

The shape of the inner cavity of the mold copper tube of the high-efficiency billet continuous caster is designed according to the solidification characteristics of the continuous cast billet. Two aspects are mainly considered: one is near the meniscus, due to the high heat flux density and heat concentration, the amount of thermal deformation of the mold copper tube. The second is the shrinkage of the billet shell during the solidification process. The design principle is that the shape of the inner cavity of the mold copper tube is consistent with the shrinkage law of the solidified blank shell to reduce the thermal resistance of the air gap.

2. The main characteristics of the copper tube material of the high-efficiency continuous casting mold

The requirements for the material of the high-efficiency continuous casting mold are good thermal conductivity, high recrystallization temperature, thermal fatigue resistance, high strength, good wear resistance, and long service life. The main feature of the copper tube material of the high-efficiency continuous casting mold is the above-mentioned copper tube material. The overall performance is the best.

3. Features of spray crystallizer

The spray crystallizer changes the isolation water gap of the tube crystallizer to spray water cooling, that is, the spray water sprayed from the nozzle is directly sprayed on the copper tube of the crystallizer to achieve cooling. The cooling efficiency is high, and there is a significant water saving effect. The spray crystallizer has a simple structure and low requirements for sealing, which avoids the problems of non-adjustable cooling intensity, relatively weak cooling intensity, and uneven temperature distribution at the corners of the copper tube of the water-slit crystallizer. Spray molds have been widely used in billet continuous casters. In theory, the spray crystallizer can use general cooling water, but the accidents caused by problems such as scaling and nozzle clogging in the actual production affect the use of the spray crystallizer.

4. Features of "water-slit" crystallizer

Both "water-slit" crystallizer and spray crystallizer are tubular crystallizers. In the "water gap type" mold, a water sleeve is added to the copper tube of the mold, and the water gap formed between the copper tube of the mold and the water sleeve is cooled by water. The "water-slit" crystallizer is stable in use and is not prone to blockage. At present, high-efficiency continuous casting generally uses a narrow water gap crystallizer with a water gap less than 4mm to increase the flow rate of the cooling water, and the parabolic taper copper tube has achieved good results.