As the crucial and staple material for producing ceramic fiber blanket, board, moduler and other formed products. Ceramic bulk fiber id normally manufactured from hign purity raw materials-alumina powder, silica sand through unique production techniques of spun or blowing, these bulks are loose, long and flexible with fine thermal properties, at present, the chopped fibers for vacuum formed production, the lubricated bulk fibers and the fiber for textiles are all available. Ceramic bulk fibers serve as an ideal filler for various types of refractory lining and insulation tools.