关键词: 滑石, 羧甲基纤维素钠, 抑制, 分散

Abstract: The  influence of sodium carboxymethyl cellulose（CMC）on the flotability and the dispersion of talc particles was studied by flotation tests, settling experiments, zeta potential determination, contact angle measurement and infra-redspectrum testing.Research results show that CMC can make the wettability of anisotropic surface and edge surface of talc increasing and trending to be similar, so that the talc floated by its hydrophobicity is depressed to realize the flotation separation of sulfide minerals and talc.However, it would not prevent small mounts of talc floating entrained with bubble.The negative potential of talc surface is increased and the dispersion of talc particles is facilitated with the addition of CMC.But it is not good for talc depression.In contrast, the aggregation of talc particles together with the decreasing of superficial area on talc face surface is favorable to depress the flotability of talc.CMC react with the anisotropic surface of talc through hydroxyl and carboxyl groups.

Key words: Talc, Sodium carboxymethyl cellulose, Depression, Dispersion