... grade and high purity refractory powders and materials. During the process of production, organic and multiple filling materials ... petrochemical,ceramics,machinery and building materials.For instance:the cracking furnace,conversion furnace, heating equipment,refining ... Standard SpecificationGrade: 23,26,28,30,32Classification temperature:1300/1400/1500/1550Size: 230x114x65/76mmDensity: 600/800/900/1000 ...