it is used for slag splashing and pertect the furnace, the mainly content is MgO and C, the proportion is as follows:
1.  MgO: 60%Min;
    C: 10%-15%
    Size: 40mm, 60mm

2.  MgO: 65%Min;
    C: 5%-10%
    Size: 40mm, 60mm

We also can adjust the proportion of magnesium and carbon and size according to the customers request