硫化-胺盐浮选体系中矿泥对泡沫稳定性的影响

发布时间：2018-08-11 17:50

【摘要】：矿泥和过稳定泡沫一直是困扰氧化锌矿硫化-铵盐浮选过程的难题。在硫化-胺盐浮选体系中开展了气-液两相和气-液-固三相的泡沫稳定性试验,选取石英、方解石和褐铁矿作为典型矿泥,考察了十二胺用量、硫化钠用量、pH值、矿泥种类和粒度对泡沫稳定性的影响,分析了矿泥对泡沫稳定性影响的内在机理。结果表明:随着十二胺用量的增大,最大泡沫高度和半衰期逐渐增大,泡沫稳定性逐渐增强;随着硫化钠用量的增大,最大泡沫高度和半衰期先增大后减小,泡沫稳定性先增强后变差;相同条件下三相泡沫的最大高度和半衰期明显大于两相泡沫,矿泥对泡沫稳定性具有显著的强化作用,而且这种强化作用随着矿泥的粒度减小而逐渐增强,不同种类矿泥对泡沫稳定性增强作用大小关系为褐铁矿方解石石英。
[Abstract]:Ore mud and over-stable foam have been a difficult problem in sulfidation-ammonium salt flotation of zinc oxide ore. The foam stability tests of gas-liquid two-phase and gas-liquid-solid three-phase were carried out in sulfide-amine flotation system. Quartz, calcite and limonite were selected as typical slime. The amount of dodecylamine, sodium sulfide and pH value were investigated. The influence of the type and particle size of the slime on the foam stability was analyzed, and the internal mechanism of the influence of the slime on the foam stability was analyzed. The results showed that with the increase of dodecylamine content, the maximum foam height and half life increased gradually, and the foam stability gradually increased, while the maximum foam height and half life increased first and then decreased with the increase of sodium sulfide content. The maximum height and half-life of three-phase foam are obviously larger than that of two-phase foam under the same conditions. Moreover, the strengthening effect is gradually enhanced with the decrease of the size of the slime, and the effect of different kinds of slime on the foam stability is related to the calcite quartz of limonite.
【作者单位】：中国矿业大学化工学院;中国矿业大学国家煤加工与国家煤加工与洁净化工程技术研究中心;
【基金】：江苏省自然科学基金青年基金项目(BK20150192)
【分类号】：TD923

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