Ramming Mass

Basic ramming masses are magnesia based refractory mass used as the refractory lining material in the furnaces. Magnesia ramming material is a bulk material made of fused magnesia as raw material, with various superfine powder additives and fused cement or composite resin as binder. In non-core induction furnace, EAF hearth, hot and cold steel launders, we can find the application of the basic ramming mass.

Acid ramming material is the premixed ramming mass of the lining material. The refined high silicon, low iron quartz sand and quartz powder are selected and the fused quartz sand is added as the refractory material. The product has high refractoriness, with no slag, no crack, damp proof, convenience of repair, and the corrosion resistance, thus greatly improving the furnace service life span and the economic benefit. Acidic ramming mass can be widely used in continuous operation or intermittent operation of ductile iron, gray cast iron, carbon steel and low melting point alloy. The acid ramming mass is used to smelt a series of metal materials such as ordinary steel and carbon steel.

The silica ramming mass is made of high purity microcrystalline quartz sand, powder, adding high temperature sintering flux and mineralizer. Because of its proper size distribution design, it can get dense unshaped lining through all kinds of knot methods. The silica ramming mass is mainly used for working lining of non-core induction furnace for melting and holding cast iron. The percentage of SiO2 is more than 98.6% and the largest amount of Al2O3 is 0.8%, with little other elements like MgO, CaO, Na2O, K2O, etc. The application temperature for steel is up to 1700℃ and for cast iron is up to 1550℃.

Carbon ramming mass is mainly used in the gap between the carbon brick and the sealing plate at the bottom of the furnace, the gap between hearth carbon brick and the cooling wall, as well as the leveling above the center line of the water cooling pipe of the furnace bottom and the filling of the cooling wall. All parts are requires a certain intensity and density, filling every corner and small gap to meet the requirements of non leakage of molten iron and gas. The thermal conductivity of carbon ramming mass material is basically consistent with the performance of hot carbon brick and cooling wall of the blast furnace, not affecting the life span of the blast furnace, thus ensuring the normal production of the blast furnace.