<報文>方鉛鉱に対するデキストリンの抑制作用について

概要

論文の詳細を見る
The depression of galena by dextrin was investigated by comparing it to that of chalcopyrite. Galena and chalcopyrite were effectively depressed by adding dextrin in both acid and alkaline solution, while in neutral solution, the depression of both minerals by dextrin were less effective. But the depression of galena by dextrin was more remarkable than that of chalcopyrite. Adsorption of dextrin on the galena surface was almost same as that on chalcopyrite. That is, the adsorption of dextrin was maximum in natural solution and decreased in acid or alkaline solution. Dextrin did not prevent the adsorption of xanthate ion on the galena surface, but the amount of adsorption of dextrin decreased by the presence of xanthate ion. Accordingly, the depression of dextrin against galena might be caused not by the prevention of xanthate adsorption, but by the increase of hydrophillicity of galena surface due to adsorption of dextrin. Also, the fact that dextrin depressed galena more remarkably than chalcopyrite might be explained by the difference of natural floatability or adsorbability of collector ion rather than by that of adsorbability of dextrin between galena and chalcopyrite.
東北大学の論文
1972-03-25