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Luoyang Jinkai Refractories Co., Ltd. specializes in the development and production of air permeable bricks for ladles and silicon ladles. The product is made of high purity homogenized raw materials, pre-grinding and mixing matrix, some raw materials are imported directly from abroad, reasonably graded, and carefully processed according to international advanced process requirements. The product has the characteristics of high strength, erosion resistance, erosion resistance, penetration resistance and long service life.            Main physical and chemical indexes of the product: Al2O3%>95.0 Cr2O3%>3.0, apparent porosity:%<16.0, bulk density:g/cm3>3.20, room temperature compressive strength:MPa 110 (>60.0), 1500 (>100.0), 1600 (>120.0). High temperature flexural strength: MPa 1400 C, 30 min (> 10.0).            Use parts: Argon blowing at the bottom of ladle and nitrogen blowing at the bottom of silicon ladle.            Construction method: the surface is evenly smeared with special ventilated brick and mortar, and the installation is stable.            Performance: In Luoyang Steel Works, Nantong Steel Works, Rizhao No. 1 Steel-making Plant and Yongtong Special Steel Works, the average erosion is 0.8-1.0 cm/furnace; in Hanyang Steel Works and Shanggang No. 5 Steel Works, good results have also been achieved.