<報文>ヘマタイトからの脱珪浮選におよぼす原鉱石英品位の影響

概要

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Flotation experiments were carried out with quartz and hematite (44-53μ in size), separately and in mixture, using a Denver-type laboratory flotator, at various values of pH and collector (dodecyl ammonium acetate, DAA) concentration, with special reference to the examination of the effect of the grade of quarfz on the reverse flotation of quartz. The results obtained are as follows : 1) Individual flotation indicated that the complete flotation of quartz was obtained at a DAA concentration of 5×10^<-5>-1×10^<-4> M (0.25-0.5kg/t) and at pH 5.0-5.4,midpoint of isoelectric points of respective minerals, while no flotation of hematite took place under corresponding conditions. 2) In the case of flotation of the mixed sample an incomplete separation was obtained under the same conditions as 1) : floatability of quartz decreased while that of hematite increased. 3) The floatability of quartz decreased markedly with decrease in grade, indicating that the reverse flotation of low grade quartz from hematite becomes difficult. 4) The poor separation of quartz described above was improved considerably by the addition of 1×10^<-4> M sodium gluconate.
東北大学の論文
1980-09-30