Henan Prosperous cover agent

Foundry to extend within the riser molten metal solidification time covering the surface of the molten metal in the riser covering material called cover agent. Cover agent in two ways: Insulation cover agent and heating covering agent Features: 1, low thermal insulation covering agent material, such as: expanded perlite, expanded graphite. 2, heating covering agent in addition to the low thermal conductivity material, adding a certain percentage of heating material in hot liquid metal, oxidizer provide oxygen reducing agent oxidation heat, extend within the riser molten metal solidification time. 3, in the case of different heat-insulating covering agent, mouth shrink into a "flat or domed dish bottom, both riser necking shape of an approximate U-shape. 4, prolong the riser top crusts time, so take long steel mouth under atmospheric pressure at the time, greatly improving the efficiency of feeding riser, cast in favor of the gas and inclusion float, achieve the purpose of purification of molten steel, and access to healthy steel, reducing scrap rates. Technology Index: Index CaO AL2O3 SiO2 C melting point density requires 10-20% 10-25% 35-45% <15% 1250 ℃ <0.60 / cm