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加工Bong山脉的硬质铁英岩铁矿石时,第一阶段磨矿采用爆落式磨矿机自磨法。由于矿石的硬度高,时常采用半自磨以保持选矿厂的额定产量。本文就衬料、磨矿介质及性能等方面对两种技术进行了对比,还分别讨论了自磨和半自磨的能量消耗,以及上述两种磨矿技术对矿石解离,排料的尺寸分布和循环载荷量及磨矿机能力的影响。Bong 选矿厂的第二和第三阶段磨矿采用不同尺寸的球磨机,这些球磨机的壳及给矿端衬板都具有独特设计。本文还详细介绍了关于衬板的发展,不同料制做的磨矿介质的消耗以及衬板消耗的经验。在 Fabrica 选矿厂,除生产烧结用矿外,还用 Jones 湿式高强度磁选机生产磁精矿。这种精矿在球团之前必须进行研磨。为此目的,已安装了尺寸和设计均和 Bong 矿山相同的球磨机,本文详细地讨论了生产结果及性能数据。
When processing the hard iron ore of the Bong range, the first stage of grinding is using blast-mill type self-grinding method. Due to the high hardness of ore, semi-autogenous mills are often used to maintain the nominal output of the concentrator. In this paper, we compared the two technologies in terms of lining, grinding media and properties, and also discussed the energy consumption of self-grinding and semi-self-grinding respectively, as well as the dissociation of ore by the above two grinding technologies, the size of discharge Distribution and cyclic loading and mill capacity. The second and third stages of the Bong concentrator mill use ball mills of different sizes, and the shell of the ball mills and the mine end linings have a unique design. This article also details the development of linings, the consumption of grinding media made with different materials, and the experience of liner consumption. In the Fabrica concentrator, in addition to producing sinter ore, Jones wet magnetic concentrators are also used to produce magnetic concentrates. This concentrate must be ground before the pellet. For this purpose, ball mills of the same size and design as the Bong mines have been installed. This article discusses in detail production results and performance data.