Xuzhou fengbao mining co. Ltd. Our company is a major manufacturer of silica(quartz) products such as high purity silica sand, silica powder, micro-silica powder, (crystal) powderandfusedsilica lump and powder, etc. These products are widely used as materials for (optic) glass, optical fiber, electrical, electronic, semiconductor, epoxy molding compound (emc), paint, coating, ceramic, chemical, building, foundry, precision casting, refractory and abrasives industries etc.