硫化鉱物のザンセート吸着における酸素の作用機構について
1971 年 87 巻 995 号 p. 85-90
詳細
1971 年 87 巻 995 号 p. 85-90
The action of oxygen on the adsorption of xanthate at the sulphide mineral/water interface was investigated using galena as a test sample.
It is recognized that the elemental sulphur is produced on the sulphide mineral surface and the galena suspension becomes more basic when it contains the dissolved oxygen.
The reaction by which the elemental sulphur and OH- ion are produced in the suspension containing the dissolved oxygen is considered thermodynamically as follows.
PbS+1/2O2+H+=Pb+++S°+OH-
The formation of the elemental sulphur closely correlates with the adsorption of xanthate on galena, especially with the incipient rate of adsorption of xanthate in the suspension of the various contents of the dissolved oxygen.
Accordingly, it is considered that the mineral surface is ionized positively by the above reaction and that the adsorption of oxygen on the sulphide mineral surface causes the improvement of the adsorption of xanthate on the mineral surface.
