1. MA-RAM corundum spinel neutral ramming material, low cracking tendency, high-strength aluminum-magnesium spinel sintered layer will be formed on the hot surface at high temperature during use, and it still maintains a good loose layer in the stomach lining .

2. CRO RAM is added with 2%-5% chromium oxide magnesia-aluminum spinel ramming material to form a high-corrosion-resistant composite spinel material at high temperature, which has a longer service life.

3. MAG-RAM is a ramming material with fused magnesium oxide as the main component. It has excellent resistance to alkaline slag and alkaline metals. It is mainly used in small coreless furnaces.