選別工程における磁硫鉄鉱の挙動におよぼす結晶の構造型ならびに酸化の影響
硫化鉄鉱の浮遊選鉱学的研究 (第6報)
1972 年 88 巻 1013 号 p. 429-434
詳細
1972 年 88 巻 1013 号 p. 429-434
For the purpose of clearing up the effects of structural type of crystals and surface oxidation on the flotation and magnetic separation behaviors of pyrrhotite in actual operation, an investigation was performed in regard to the Kawayama concentrator, Yamaguchi Pref.
The main results obtained are as follows:
(a) The ratio of hexagonal pyrrhotite (H. Po) and monoclinic one (M. Po) in the crude are lies between 6:4 and 5: 5.
(b) In the rougher circuit of copper flotation which is done at the first stage of separation, M. Po floats in preference to H. Po.
(c) M. Po composes approximately 80 per cent of the total pyrrhotite contained in the concentrate of magnetic separation which is followed by zinc and pyrrhotite flotation.
(d) In the flotation circuits of zinc and pyrrhotite, H. Po floats in preference to M. Po as the general tendency. The reason of this contradictive phenomenon may be based on the following two facts. 1) A protective film such as ferric hydroxide is formed on M. Po preferehtially to H. Po by oxidation in aerated solution. 2) The protective film is possible to give a harmful effect on collection of pyrrhotite in xanthate flotation attended by prior activation with copper sulphate.
