Function of protective slag for crystallizer accessories1. The copper mold tube manufacturer introduces the barrier function (mainly completed by the liquid sl

Function of protective slag for crystallizer accessories

1. The copper mold tube manufacturer introduces the barrier function (mainly completed by the liquid slag layer). It isolates the contact between air and molten steel, blocks the secondary oxidation of molten steel, blocks the contact between carbon rich layer and molten steel, avoids the carburization of slab surface, improves slab surface quality and reduces steel loss. Note: carburization of low carbon steel and ultra-low carbon steel surface will produce brittle slab.

2. Thermal insulation (mainly completed by solid slag). It greatly improves the plant operating environment (heat radiation) and facilitates the smooth continuous casting. A sufficiently thick solid slag layer can give better play to the thermal insulation performance of protective slag and prevent the condensation of cold steel and floating steel on the crystal steel liquid level. The increase of the temperature in the meniscus area will avoid many problems and accidents, such as cracks, pores on the slab surface, etc.

3. Function of crystallizer accessories protective slag: absorption Melting impurities (mainly completed by liquid slag layer) assimilation. It can effectively absorb melting inclusions (system refractory, deoxidation products and other metal inclusions), protect its own performance from change, purify molten steel, improve the purity of slab surface, low viscosity of protective slag and proper control of some components of protective slag, which is good for slag absorption.

The good effect of mold powder for continuous casting billet mold and other mold accessories is related to other chemical composition, physical properties of raw materials and combination format of various raw materials. The melting characteristics with reasonable physical and chemical properties and stable and uniform layered structure and certain slag layer are indispensable.