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通过对西非利比里亚邦格采矿公司(BMC)铁矿石的各种选别方案的研究探明了引入闭路磨矿回路对投资和生产费用的影响程度。利本堡铁矿选矿研究所(SGA)对开路磨矿和闭路磨矿方案进行了一系列的对比试验,考查的范围包括自磨到细磨(球磨机)的整个碎磨过程。在同样选矿指标和大致相等的投资费用情况下,闭路磨矿方案具有较高的材料消耗,然而这些消耗却因该方案节电22％而得到大大补偿。
A study of various options for iron ore from BMC in Liberia has identified the impact of the introduction of closed-circuit grinding circuits on investment and production costs. A series of comparative tests were carried out at the Libburger Institute of Mineral Processing (SGA) on open-circuit and closed-circuit grinding programs, ranging from self-grinding to fine grinding (ball mill). With the same beneficiation target and approximately equal investment costs, closed-circuit grinding programs have high material consumption, yet these costs are significantly offset by a 22% saving on the program.