閃亜鉛鉱の銅イオン吸着におよぼす閃亜鉛鉱中の鉄分の影響

抄録

The kinetics for the copper ion adsorption on sphalerites of various iron contents was studied by measuring the adsorption of copper ion in the presence of oxygen and in the oxygen-free circumstances.
The relations between the copper ion adsorption rate and the agitation rate were characterized by a straight line in the log-log plot. With the increase of iron contents in sphalerite, the copper ion adsorption rate on sphalerite decreased in the case where oxygen was sufficiently dissolved in the copper ion solution and the pH was high enough.
The reaction rate of the copper ion adsorption on sphalerite changed from the rate of the parabolic function to the rate of the exponential function with the increase of iron contents in sphalerite. As a result, in the abovestated conditions, it was surmised that the kinetics for the copper ion adsorption on sphalerites of various iron contents was considerably complex. The kinetics for the copper ion adsorption on pyrrhotite was explained by the protective film theory.
From the above results, it may be considered that the dissolved oxygen in the pulp is one of the important factors for the copper activation of sphalerite.