山东省沂南县是我国三大石英砂岩资源成矿区域之一,县域内分布着丰富的石英砂岩资源,其石英砂岩资源有着量大、质优、易采、易选的特点,经选矿加工成的石英砂和石英精砂,质优价廉,产出率高。石英砂广泛用于玻璃、陶瓷、水泥、铸造、耐火材料等行业。近年来,随着石英砂资源的大量开采,沂南成为名副其实的中国石英砂生产基 Yinan County, Shandong Province, is one of the three quartz sandstone resource mineralization areas in China. Rich resources of quartz sandstone are distributed in the county. The quartz sandstone resources are characterized by large quantity, high quality, easy mining and easy selection. The ore dressing process Into the quartz sand and quartz sand, quality and cheap, high yield. Quartz sand is widely used in glass, ceramics, cement, casting, refractories and other industries. In recent years, with the massive exploitation of quartz sand resources, Yinan has become a veritable Chinese quartz sand production base