普通石英砂

指出了贝壳砂的工程特性与普通石英砂的差别。

The differences between engineering properties of sand with shell and normal quartz sand were put forward .

普通石英砂应用在玻璃、陶瓷、橡胶、铸造等领域。

Ordinary quartz sand are used in glass , ceramics , rubber , foundry and other fields .

本文研究了采用烧结石墨滤料作为给水处理滤料的技术可行性。并对烧结石墨滤料滤床和普通石英砂滤床进行了平行对比试验。

This paper deals with the application of sintered graphite as a filter medium for water treatment .

以普通的石英砂（20～40目）滤料为基本原料，表面改性制备了一种投资省的多功能水与废水吸附过滤材料。

The surface characteristics were examined of the coated sand , a new adsorptive filtra-tion material for water and wastewater .

以ZG310570为基体、WC颗粒为增强相，在普通水玻璃石英砂干型、无负压条件下，运用自制的复合剂，制备出WC颗粒增强钢基表面复合材料。

WC particle surface reinforced steel composite was investigated by using self-made additive under the conditions of dry sand mould hardened by aqueous silicate sodium , the whole procedure was done in atmospheric pressure environment without any vacuum .