脂肪酸・トールオイルによる重砂の浮選
1971 年 87 巻 1006 号 p. 1047-1052
詳細
1971 年 87 巻 1006 号 p. 1047-1052
The basic flotation characteristics of garnet, zircon, ilmenite and magnetite were determined by floatability and flocculation measurements and infrared measurements with various 18-carbon fatty acids and tall oils.
The effect of fatty acid on the floatability and flocculation of garnet, zircon, magnetite and ilmenite decreases in the following order: linolenic→linoleic→oleic acid at pH values less than about 10, while at higher pH ranges, the above order is reversed. The critical pH values for the minerals with 10-4mol/lof fatty acids and 50mg/lof crude tall oil indicate the following order of float ability: monazite>garnet>zircon, magnetite, ilmenite in the alkaline side, and zircon, magnetite>garnet>ilmenite in the acid side.
The pH dependence of the floatability and flocculation behaviour of the minerals and the infrared observations for oleic acid adsorbed on magnetite indicate that both chemisorption and physical adsorption of collector would take place on the mineral surface.
Also, the selectivity of fatty acids on the above minerals was discussed by practical tests on Beach sand.
