磁硫鉄鉱・黄鉄鉱・白鉄鉱の浮遊性におよぼす酸化の影響

硫化鉄鉱の浮遊選鉱学的研究 (第2報)

抄録

For the purpose of clearing up the effects of oxidation phenomenon of pyrrhotite, pyrite and marcasite. on their flotation properties, first of all, their oxidation properties were contrasted each other, next, the relation between prior oxidation in various conditions and flotation recovery was investigated. From this investigation, it was recognized, as a common tendency, that in xanthate flotation of iron sulphide minerals, their flotation recovery increases for a time in course of oxidation, and at a time when oxidation advanced to some extent, their recovery begins to decrease.
Considering also a connection with the knowledge obtained by the investigation on natural oxidation in water to the actual operation, the followings may be said.
a) There is a possibility that the particles of pyrrhotite and pyrite which begin to oxidize newly after grinding stage, and are considered to take the trend of quantity, are remarkably promoted in their floatability on xanthate flotation by acceleration of oxidation in water within a certain extent, for example, the increase. of aeration time.
b) Acceleration of oxidation in water is in danger of giving a fairly harmful effect on collection of pyrrhotite in the process of xanthate flotation attended by prior activation with copper sulphate. As a general rule, such danger is not brought on pyrite.