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本文提出了氨基硫代醋酸盐 (ArmacC)捕收剂和常规黄药 (戊基钾黄药 ,KAX)捕收剂在黄铁矿上吸附的机理。这些结果可以帮助我们很好地了解这两种捕收剂在黄铁矿浮选中的行为。绘出了在自然 pH和碱性pH(11)时捕收剂的吸附等温线。应用光谱方法测定了溶液中KAX和Armac捕收剂的浓度。在氢氧化钠和石灰作为 pH调整剂时 ,考虑了pH调整剂种类的影响。当捕收剂在矿物表面上的统计复盖密度 (θ)大于 0 9时 ,用漫反射富立叶变换红外光谱检测了捕收剂在黄铁矿表面上的吸附行为。结果表明 ,黄药捕收剂主要以戊基双黄药形式吸附。在碱性介质中 ,黄药对黄铁矿的吸附亲合力降低。在用KAX作捕收剂时 ,消石灰对黄铁矿的抑制作用比氢氧化钠要强。吸附等温线也表明在碱性pH范围 ,Armac对黄铁矿具有亲合力。与KAX作用不同 ,Armac捕收剂对黄铁矿的亲合力似乎与 pH调整剂的种类关系不大。在统计表面复盖率大于 0 3时才能检测出Armc分子 ,仅在 θ大于 12时 ,才能观察到亲水官能团 (-C -C =S、-CNH -和 -COH)。在捕收剂发生单层吸附时 ,未获得有关捕收剂吸附机理信息。用含硫化矿物的尾矿进行了浮选试验。试验结果验证了用纯黄铁矿样品获得的结果
In this paper, the adsorption mechanism of ArmacC collector and conventional xanthate (pentyl potassium kosher, KAX) collector on pyrite was proposed. These results can help us to understand well the behavior of these two collectors in flotation of pyrite. The sorption isotherms of collectors at both natural pH and alkaline pH (11) are plotted. The concentration of KAX and Armac collectors in solution was determined spectrophotometrically. In the case of sodium hydroxide and lime as the pH adjuster, the influence of the pH adjuster type is considered. When the statistical coverage density (θ) of the collector on the mineral surface is greater than 0 9, the adsorption behavior of the collector on the pyrite surface was examined by diffuse reflectance Fourier transform infrared spectroscopy. The results show that the xanthate collector is mainly adsorbed in the form of pentyl dioxan. In alkaline medium, xanthate adsorption affinity for pyrite decreased. In KAX as a collector, slaked lime pyrite inhibition stronger than sodium hydroxide. Adsorption isotherms also show that Armac has affinity for pyrite at alkaline pH. Unlike KAX, the affinity of Armac collectors for pyrite appears to have little to do with the type of pH adjuster. Armc molecules were detected at a statistical surface coverage of more than 0.3, and hydrophilic functional groups (-C-C = S, -CNH- and -COH) were only observed for θ greater than 12. In the monolayer adsorption collector, no information on the collector adsorption mechanism. Flotation tests were conducted on tailings containing sulphide minerals. The test results validate the results obtained with pure pyrite samples