机制砂细度模数不可控、成品砂超粒径粗粒过多是目前机制砂生产中不可避免的问题。
海王隔粗洗砂细砂回收工艺针对以上情况，通过对机制砂进行隔粗处理可达到“去粗取精”的工艺目标。
海王隔粗洗砂细砂回收工艺可根据现场实际情况采用洗前隔粗或者洗后隔粗，前者进行预先隔粗后再进行水洗砂作业，主要用于来料粗粒较多的情况，后者水洗砂作业之后再进行隔粗脱水，主要用于来料粗粒较少的情况。
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