Effect of Fine Slime on the Choice of Columbium Ore Pretreatment Flowsheets
G. I. GAZALEEVA1, E. V. BRATYGIN1, I. A. VLASOV1, S. V. MAMONOV1, A. A. ROGOZHIN2, A. V. KURKOV2
1Uralmekhanobr Research and Design Institute for Mineral Dressing and Mechanical Conversion, ul. Khokhryakova 87, Ekaterinburg, 620144 Russia
2Fedorovsky All-Russian Research Institute of Mineral Raw Materials, Staromonetnyi per. 31, Moscow, 119017 Russia
Keywords: cтепень ошламования, лазерный гранулометр, рудоподготовка, критерий селективности, ниобиевая руда, измельчение, грохочение, технологическая схема, slime formation rate, laser granulometer, ore pretreatment, selectivity criterion, columbium ore, milling, screening, flowsheet
Abstract
The article presents studies of slime formation in processing of Vishnevogorsk columbium ore. The slime formation criterion is assumed as the presence of size grades less than 50 and 5 µm estimated from modern laser granulometer data. The optimal methods and equipment for grinding are chosen depending on rate of slime formation in final products. The studies use centrifugal and rod mills. The rod mill assures the lowest rate of slime formation. Based on the experimental results, the columbium ore pretreatment flowsheet and special ore disintegration methods have been selected. The flowsheet uses crushing machines ensuring the highest rate selectivity-inertia cone crusher and the lowest rate slime formation during milling-rod mill.
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