<報文>黄鉄鉱に対する抑制剤および活性剤の反応

概要

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In order to investigate the effects of acid, alkaline, calcium and cyanide ions as depressants and of cupric ion as an activator in flotation of pyrite, experiments were carried out by using a liquid column chromatograph as a continuous flow calorimeter. The results obtained are summarized as follows : 1) The heats evolved by the reaction of acid on pyrite at pH value 2.0 decrease steeply following the maximum point. 2) The rate of reaction of alkaline ion on pyrite remains constant at pH value 12.2 and its reaction represents a considerable heat evolution. It may be explained as a result of a physical separation of the ferrous hydroxide coating from the surface of pyrite. 3) Calcium ion adsorbs considerably with the formation of a protective film on the surface of pyrite in alkaline solution. Therefore, the adsorbed calcium ion also prevents the continuous reaction of OH-ion on pyrite. The adsorbed calcium ion may be partially removed by washing. 4) Even though cupric ion may be adsorbed on the surface of pyrite, it is very difficult to detect its heat evolution by the liquid column chromatograph. 5) The effect of cyanide ion differs from that of OH^- ion, because cupric, ferrous and ferric compounds adsorbed on pyrite are dissolved by cyanide ion, and because the surface of pyrite becomes coated with a protective film of adsorbed cyanide complex.
東北大学の論文
1973-03-30