【摘要】 氧化铜、铁矿物直接浮选分离是难选氧化铜矿物浮选回收的关键。本文以孔雀石和最难选的假孔雀石作为氧化铜矿物的代表性矿物,对假孔雀石、孔雀石和褐铁矿的人工混合矿样（含孔雀石和假孔雀石各16.6%,褐铁矿66.8%）,在矿浆自然pH值下,用辛基羟肟酸钾作捕收剂,（Na PO₃）₆作抑制剂,一次浮选可获得铜回收率97.33%,精矿含铜46.57%的指标,分选效率高达87.30%。通过一系列的分析测试证明:（NaPO₃）₆对Fe³⁺、Ca²⁺的络合能力远大于Cu²⁺,它以σ键和反馈π键与氧化铁矿物表面晶格中的铁原子形成极其稳定的配合物,抑制了氧化铁矿物。并提出了捕收剂、抑制剂的作用模型。更多还原

【Abstract】 The key to solve the difficult problem in recovery of refractory copper-oxide minerals is the flotation separation of copper-oxide minerals from iron-oxide minerals. In this paper a new recovery method of refractory pseudomalachite and malachite is described. The results demonstrated that sodium hexametaphosphate could depress iron-oxide minerals with C₈H₁₇-GONOK as collector. In the test of one stage flotation of mineral mixtures （16.6% pseudomalachite, 16.6% malachite and 66.7% iron-oxide minerals） at pH8.2, the copper concentrate containing 46.57% Cu and 8.6% Fe with Cu recovery of 97.33% was obtained.By means of infrared spectroscopy, ultraviolet spectroscopy and photoelectron spectroscopy, the interaction between mineral surfaces and reagents as well as the complexing property of sodium hexametaphosphate were investigated. The results indicated that （NaPO₃）₆ could complex Fe³⁺ ion in both σ-bond and π-bond, consequently chemically adsorbed on the surface of iron-oxide minerals. The activation centers on mineral surface were covered with this complex. So the iron-oxide minerals were depressed. The model of the interaction between minerals surface, depressants and collectors was established.更多还原