The dune sands are very well sorted and rounded pure quartz sand(>95%) with single mode grain distribution and without suspension materials.
沙丘砂由分选、磨圆好的石英砂组成，含量大于95%，具单众数粒度分布，无悬移质。
2
Results show that the rectorite cant be used when molding sand, but it is a good suspension agent for mold coating.
试验表明，累托石粘土粉不宜直接用于型砂，但它是一种优良的水基涂料的悬浮剂。
3
The process includes the waste purification from oil emulsion in Tilted-Plate Separator and the suspension separation in the downward-flow sand-gravel filter.