方鉛鉱の浮遊性におよぼす鉱液加温の影響とこれを利用した銅鉛分離浮選
1970 年 86 巻 981 号 p. 31-34
詳細
1970 年 86 巻 981 号 p. 31-34
At Uchinotai Mill of Kosaka Mine, Cu-Pb bulk concentrate is floated, depressing Zn and Fe by sulphurous acid. Formerly, Pb was floated from the bulk concentrate by sodium cyanide to depress Cu minerals. But this method, as known well, was not always economical because of soluble loss of valuable metals and high operating cost. Recently, as a result of laboratory flotation tests using relatively pure galena and chalcopyrite, it was found that pulp heating was an effective means to depress galena, and float chalcopyrite. Flotation tests from Cu-Pb bulk concentrate (16.7% Cu, 13.7% Pb) showed that after pulp heating up to about 70°C for several minutes Cu concentrate was floated without additional reagents. Tailing became Pb concentrate.
By repeating these laboratory and continuous flotation tests, we decided that this method could be applied to practice. So the new flowsheet of Cu-Pb separation has been introduced at Uchinotai Mill since Nov. 1968.
Operation is now going on favorably.
