方鉛鑛의 浮選에 있어 Cu^(2+)의 活性에 關한 硏究 = A Study on the Activation of Cu^(2+) in Galena Floatation

다국어 초록 (Multilingual Abstract)

The plenty of Pb and, Zn ores are produced in our country. Pure minerals, however, are rarely produced because most of them deposit in complicated state of coexistence of sulphides galena and zincblende. In view of this state, it is dificult for them to be fleated.
Therefore, activation of galena with copper ions and floatability of the copper-activated galena in the presence of sulfide have been investigated by means of adsorption measurements and floatation tests, in order to elucidate the floatation behaivor of galena in block ore.
The results obtained areas follows:
(1) Activation of galena with copper ions proceeds according to the following exchange reaction, PbS+Cu^(2+) = CuS+Pb^(2+) which is controlled by the parabolic rate law.
(2) Copper activation leads to an increase of the galena floatability, which may be caused not by an increase of uptake of collector, but by an increase of the nactive floatability of galena.
(3) In galena-sphalerite mixture suspension, copper ion is abstracted by galena in preference to sphalerite, but the floatability of sphalerite remakably increases with copper activation and galena can not be separated by depressing sphalerite with sodium bisulfite.
(4) In this case, galena can be floated from sphalerite by depressing the latter with sodium bisulfite together with zinc sulfate after a suitable extent of copper activation.