Light Burnt Magnesia Ball

Light Burnt Magnesia Ball Introduction:

Light burnt magnesia ball is mainly used as the composition regulator of converter slag splashing. Because the slag splashing requires proper viscosity and fire resistance, reasonable slag composition is the key to realize the slag splashing. Generally slag can not be sprayed directly to protect the furnace. A certain amount of magnesia ball is added to adjust the slag. Since MgO is a kind of high melting point mineral, the melting point is 2800℃, the increase of MgO content in slag will increase the viscosity of slag and improve the fire resistance. The slag is easy to combine with the lining, forming an effective slag protection layer on the lining, improving the life of the lining and reducing the consumption.

Light Burnt Magnesia Ball Application:

Light calcined magnesium ball is made of ordinary light calcined magnesium powder by mixing and pressing into ball It is mainly used in converter steelmaking and slag splashing to protect the furnace and extend service life ofthe converter. The preparation of light calcined magnesium ball is to add 20% water to 80% of light calcined magnesium powder which will then be put into the mixing mill for rolling, stirring and mixing (for 15 – 20min) to form the mixed material. and then send to ball pressing equipment through the belt conveyor to manufacture the product. Once manufactured the products will be piled up, After 48h drying and forming strength, the light calcined magnesium ball will be ready for sale.

In the converter steelmaking process, the viscosity of the slag has a close relationship with the mass transfer and heat transfer rate of the slag and metal parts, thus affecting the reaction rate of the slag-steel reaction and the heat transfer capacity of the slag. Slag with too high viscosity makes the molten pool inactive and the smelting cannot proceed smoothly; slag with too low viscosity is prone to splashing and seriously corrodes the refractory materials of the furnace lining, reducing the life of the furnace lining. Therefore, the factors affecting the viscosity of the slag are mainly the composition of the slag and the smelting temperature. The use of magnesium balls for steelmaking can flexibly meet the requirements for slag in the initial stage of converter blowing and the end of smelting. That is, in the initial stage of smelting, magnesium balls are used to adjust the viscosity of the slag to prevent splashing and optimize dephosphorization, while reducing the erosion of the slag on the furnace lining; magnesium balls are added in the middle stage of smelting to ensure that the magnesium oxide content in the slag is between 6% and 12%, increase the viscosity and basicity of the slag, and optimize decarburization and dephosphorization; adding some magnesium balls before the end of smelting can further increase the magnesium oxide content in the slag, prompting the converter slag to form a high melting point phase in the middle of the slag splashing furnace protection process, thereby protecting the furnace lining.