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本文给出磁铁矿(瑞典基鲁纳)和铬铁矿(希腊斯科姆特萨)的磨矿试验结果。矿石在试验室用HSM/250Herzog环式磨机磨矿,磨矿前后用X光衍射测量矿物特性结构空间变化的应力状态。磁铁矿和铬铁矿晶体分析采用测量最强的衍射峰(311)宽度的方法,铬铁矿的结构分析用Mikheev模型。磁铁矿和铬铁矿超细磨试验证明这种磨矿方式能诱导表面-应力状态的明显变化,这些变化包括晶胞的塑性变化及其后矿物结构的氧化作用形成氢氧化物或碳酸盐薄膜时产生的“化学”应力。这对矿物和浮选药剂的反应作用有很大的影响。
This paper presents the results of the grinding tests on magnetite (Kiruna, Sweden) and chromite (Smitagea, Greece). The ore was ground in a laboratory using a HSM / 250 Herzog ring mill, and X-ray diffraction was used to measure the stress state of the spatial variation of mineral properties before and after grinding. The magnetite and chromite crystals were analyzed using the Mikheev model for the structural analysis of chromite using the method of measuring the width of the strongest diffraction peak (311). Magnetite and chromite ultrafine grinding tests have shown that this type of grinding method can induce significant changes in the surface-stress state, including changes in the plasticity of the unit cell and the subsequent oxidation of the mineral structure to form hydroxides or carbonic acid Salt produced when the “chemical ” stress. This has a great effect on the reaction of minerals and flotation reagents.