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考查了在用丁基黄药作捕收剂时 ,低分子量的有机药剂 (二甲基二硫代氨基甲酸钠 ,ДМДК)对磁黄铁矿可浮性的影响。测定了丁基黄药和 ДМДК在磁黄铁矿表面上的吸附量 ,并研究了 ДМДК对丁基黄药与磁黄铁矿相互作用的影响。研究结果表明 ,有 ДМДК存在时 ,磁黄铁矿对丁基黄药的吸附量大幅度降低 ,使其可浮性减弱。在这种情况下 ,约 60 %～ 70 %的仅能使矿物表面弱疏水化的 ДМДК吸附在磁黄铁矿表面上形成了较大的复盖层 ,从而降低疏水性强的丁基黄药在矿物表面上的吸附量 ,从而降低磁黄铁矿的可浮性
The effect of low molecular weight organic agents (sodium dimethyldithiocarbamate, ДМДК) on the flotability of pyrrhotite was examined when butyl xanthate was used as a collector. The adsorption amount of butyl xanthate and ДМДК on the surface of pyrrhotite was determined and the influence of ДМДК on the interaction between butyl xanthate and pyrrhotite was studied. The results show that in the presence of ДМДК, the adsorption capacity of pyrrhotine to butyl xanthate is greatly reduced, making its floatability weaken. In this case, about 60% to 70% of the ДМДК adsorption, which weakly hydrophobes the surface of the mineral, forms a larger coating on the pyrrhotite surface, thereby reducing the hydrophobicity of butyl xanthate The amount of adsorption on the mineral surface reduces the flotability of pyrrhotite