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离心选矿机是目前回收细粒级重矿物较为理想的设备,已在有色、黑色金属矿选矿厂得到广泛应用。现将其应用于富集铀钍矿物。初步试验结果尚令人满意。 在可选性研究中,遇到的几个磁铁矿矿石,含有较少量的方钍石、晶质细矿物,具有一定嵌布粒度,其比重达9.08～10.2;而脉石及其他金属矿物比重为2.5～5.5;轻重矿物比重差大,构成了易于重选分离的必需条件。但铀在磁铁矿石中品位很低,一般为0.0019％或0.004％。为了满足回收主元素铁及伴生元素磷或硼的要求,必须将矿石磨至-200目占80％或98％。矿石经过选铁、选磷后铀钍矿物有所富集,但一般铀品位也只有0.0027～0.0032％或0.0079～0.0104％,钍晶位0.017％。品位这样低的铀钍矿要想综合回收,并减少环境污染,
Centrifugal concentrator is the ideal equipment for recovering fine-grained heavy minerals. It has been widely used in non-ferrous and ferrous metal concentrates. Now it is applied to the enrichment of uranium and thorium minerals. The preliminary test results are still satisfactory. In the study of selectivity, some magnetite ores, which contain relatively small amounts of cubic thorium and crystalline fine minerals, have a certain intergranular particle size with a specific gravity of 9.08-10.2. However, gangue and other metals The specific gravity of the minerals is 2.5-5.5; the difference of light and heavy minerals is large, which constitutes the necessary condition for easy re-separation. But uranium in the magnetite grade is very low, usually 0.0019% or 0.004%. In order to meet the requirements for recovery of main elemental iron and associated elemental phosphorus or boron, the ore must be milled to -200 mesh or 80% or 98%. Ore after election iron, phosphorus enrichment of uranium and thorium minerals, uranium grade general but only 0.0027 ~ 0.0032% or 0.0079 ~ 0.0104%, thorium 0.017%. Such a low uranium thorium mine grade to comprehensive recovery, and reduce environmental pollution,