Efficient drainage sand siliceous sand drainage Tianjian Brilliance

Chrome drainage sand physical and chemical indicators (%) Particle size (mm) 0.5 ~ 3.0 Cr2O3 38 ± 10 press interest angle (degrees) 29.5 Fe2O3 1.2 ± 0.5 sintering case (1650 ℃) good SiO2 52 ± 10 Bulk density (g / cm3 ) 2.80 MgO ≤15 case of thermal shock cracking Al2O3 1.0 ± 0.5 Tc (solid) ≤3 not automatically open casting ladle hazards: (1) there will be a part of the open casting molten steel, molten steel is easy to cause secondary oxidation, affect the protection effect of casting ; (2) the molten steel can not be a long nozzle and the direct red scum layer sprinkled on the middle pack, easy to slag into the molten steel and mixed together into the mold is formed, reduce the quality of the slab of high standard varieties of steel Production is particularly unfavorable; personal (3) burn oxygen drainage operator safety operation will generate a great threat, the equipment will cause some damage; (4) the efficiency of the continuous casting production lines will be affected.