Continuous casting protection slag
Continuous casting protection slag is a specialized slag for continuous casting process, which can be used to protect refractory lining from infiltration corrosion by molten steel when continuous casting is in the open process. The content of the continuous casting protection slag includes silicate metal oxides, alkali steel oxides, reaction accelerator and other related trace elements.
Continuous casting protection slag is a kind of secondary refractory material, used to protect melting refractory lining and metal in the process of continuous casting of steel. Ideally, continuous casting protection slag should prevent molten steel from direct contact with molten refractory, and at the same time, it should have enough strength to support the steel shell, keep the continuous casting shape, absorb some of the heat energy that generated in the process of solidification of the steel shell.
The main function of continuous casting protection slag is to act as an insulation material between molten steel and protective refractory material. In addition, it also helps to improve the liquidity of steel, prevent the spilling of steel on refractory, so as to extend the refractory life, and to promote the entire process of continuous casting.
The main technological indicators of continuous casting protection slag are apparent porosity, apparent density, water rate, softening temperature, slag-steel reaction speed, cold crushing strength and compressive strength.
The choice of continuous casting protection slag means that the manufacturer must make sure that the slag they choose is of good quality, while considering the technological parameters and the budget. It is not enough to only consider the price. The manufacturer must have an overall idea of the whole process. The most important thing is to consider the reaction speed and temperature when choosing the slag. The slag needs to be able to solidify quickly and keep good insulation effect when pouring into the ladle.
Continuous casting protection slag is a metallurgical special slag. It can effectively solve the problem of molten steel infiltration and embrittlement of refractory lining in the continuous casting process. It is imperative to choose the appropriate continuous casting protection slag, which can improve the continuous casting efficiency, and make comprehensive consideration from the technological indicators, budget, production process and equipment.
