Quartz sand series - insulation material with quartz sand and gravel sand is a hard, wear-resistant, stable chemical properties of silicate minerals, the main mineral component is SiO2, quartz sand color is milky white, or colorless translucent, hardness 7, is brittle cleavage, conchoidal fracture, oil sheen, density of 2.65, bulk density (the 1-20 mesh 1.6,20-200 mesh 1.5, chemical, thermal and mechanical properties have obvious anisotropy insoluble in acid, slightly soluble in KOH solution, the melting point of 1750 ° C insulation material with quartz sand: SiO2 ≥ 90-99% Fe2O3 ≤ 0.06-0.02%, commonly used particle size of 40-70 mesh ,20-40 mesh, 10-20 head, the appearance of milky white or pure white, free of impurities. the Lingshou Yijia Mining Co., Ltd. specializing in the production of quartz sand. calls to the factory advisory missions. Contact 0311 -6,750,587,518,633,901,079 Company URL: http://www.yijiaky.com