The selection of the East China Sea region unique quartz ore as raw material, the use of state-of-the-art purification equipment production of high-quality quartz sand, stable production SiO2 content PQC in between 99.99-99.9993% high purity quartz sand, PQS, pQE (0-4) three series of six products, the characteristics of the low-phosphorus and low boron widely used in polysilicon, quartz crucible and solar, semiconductor field. Quartz sand test items are: Microstructure, grain size and scope, impurity content, hydroxyl and water, color point.