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(一)基本情况及矿石性质柿竹园选矿厂重选产出的白钨粗精矿称为毛砂,白钨粗精矿的精选称为毛砂加工。毛砂加工是将毛砂通过浮选直接产出一级一类白钨精矿(65%WO_3)。要求毛砂 WO_3品位大于15%,磁铁矿含量小于40%。1985年11月选矿厂开始处理三矿带6号采场的矿石(1986年计划全部处理6号采场的矿石)。由于6号采场的矿石性质与其它采场的矿石性质有较大的差别,因而重选产出的白钨粗精矿的矿物组成变化也较大。分析结果见下表。
(A) of the basic situation and nature of ore Shizuyuan concentrator re-election output of scheelite crude sand called sand, scheelite concentrate selected sand sand processing. Sand processing is the sand through the flotation directly to produce a class of scheelite concentrate (65% WO_3). Sandstone WO_3 grade requirements of more than 15%, magnetite content of less than 40%. In November 1985, the beneficiation plant started to process the ore at No.6 seam in the Three Mines (planned to fully handle the ore in No.6 stope in 1986). The ore composition of No 6 stope is different from the ore properties of other stopes. Therefore, the mineral composition of the scheelite crude concentrate that is re-selected also changes greatly. The results of the analysis are shown in the following table.