RMH-LF product is used for ladle refining furnace, RMH-DH product is used for steel-making submerged arc furnace. Using this product will ensure submerged arc foaming during the whole smelting process. It will reduce the heat radiation loss of arc and increase the heat efficiency. Direct radiation erosion from high temperature arc to the lining can be avoided, lifetime of the lining will be longer. Dephosphorization rate will be higher and smelting time will be shorter.