<報文>輝水鉛鉱の浮選に関する研究(第2報)ケシロン浮選に関する二, 三の実験

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  • キスイエンコウ ノ フセン ニ カンスル ケンキュウ 2
  • <Original Papers>Studies on the Flotation of Molybdenite. (II) Some Experiments on the Kerosene Flotation

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Some experiments were carried out on the flotation properties of kerosene which is commonly used for molybdenite ore. Two kinds of molybdenite ore from the Daito mine, Shimane Prefecture, were used as samples. Kerosene shows the different flotation effects on the samples of ore having the different mineral compositions and size distributions, though they were obtained from the same mine. But it would be worthwhile to note that kerosene has an effect of improving the flotation results of low grade ore. The distilled fractions of kerosene, having the intermediate boiling points, are more effective than those of high and low boiling points. It may be expected that the conditioning for suitable period after adding kerosene promotes the selectivity of molybdenite and pyrite. The increase in the proportion of kerosene mixed with pine oil is also useful in obtaining the higher selectivities. Generally, the use of emulsifying agents with kerosene increases the recovery of MoS_2. Non-ionic emulsifying agents, particularly polyglycolesters of fatty acids or alkylphenolpoly-glycolethers, give good flotation results. Moreover, the use of emulsifying agents contributes to the improvement of the worse conditions of froths caused by the addition of kerosene.

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