Abstract
The operation of a slime flotation in Tsuchihata Mill had been hindered by considerable quantities of soluble salts, mainly copper sulphate which amounts to about 0.16% Cu, contained in the crude ores, so that the extraction of copper had been very low.However, in 1955, we started the laboratory test of a new process, “Leach-Precipitation-Flotation Process” to improve the slime flotation our.Having got promising results we have put the process into a plant test, which showed nearly satisfactory results. Thus we have constructed the “L-P-F” plant in 1958.In this paper, the following problems are described;(1) Substitution of a copper ion using an iron powder as a precipitant.(2) Floatability of a cement copper.(3) Flotation test using a “L-P-F” process.(4) Recovering method of unreacted iron powder in flotation tailing.(5) Operation of the “L-P-F” plant.(6) Trends of the slime flotation results.
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