重金属イオンによる赤金鉱山産磁硫鉄鉱の活性化について

抄録

In order to study the mechanism of activation of pyrrhotite by heavy-metallic ions in flotation, theadsorbabilities of Cu²⁺, Hg²⁺, Ag⁺, Cd²⁺, Pb²⁺, Zn²⁺, Ni²⁺ and Co²⁺ ions on the pyrrhotite were studied. Then the amounts of ethyl xanthate adsorbed on the pyrrhotite which had been activated by these respective ions were determined at various pH values of the pulp. Also the floatabilities of the pyrrhotite conditioned with the solution containing these ions were measured.
From these experimental results, it was shown that Cu²⁺, Hg²⁺ and Ag⁺ ions were strongly adsorbed on the pyrrhotite accompanied by the replacement of Fe²⁺ ion on the surface of pyrrhotite; that the amounts of ethyl xanthate adsorbed on the pyrrhotite fairly increased only when the pyrrhotite had been pretreated by Cu²⁺, Hg²⁺ and Ag⁺ ions; and that the floatability was promoted by the presence of these respective ions.