Water chemistry is one of the most important parameters affecting flotation performance. Various types of ions can dissolve and accumulate in process water depending on ore mineralogy, reagent scheme, grinding medium and chemistry of mine site water. Sulfur-based ions (sulfate, thiosulfate, polythionate) are generally observed in flotation of sulfide ores. High concentrations of these ions may reduce efficiency of the flotation process, causing scale problems. Removal of these ions from process water often requires complex water treatment plants with high capital and operating costs. In this study, partial cleaning of water was investigated as an alternative approach for decreasing high sulphate concentrations of 3000–3800 mg/L down to 1000–1500 mg/L, an acceptable concentration for most sulfide ore flotation plants, by using an ion-exchange resin. For this purpose, detailed adsorption tests were performed using a laboratory-scale column system to determine the most suitable type of resin for adsorption of sulfate and thiosalts, kinetics of adsorption and regeneration of the resins. A strong base anion ion exchange resin (Selion SBA2000) was used in the experiments. The findings from the laboratory scale studies were validated in a Cu-Pb-Zn Flotation Plant in an Iberian mine using a larger scale of column set-up. The results showed that 60–70% of sulphates could be successfully removed from process water. Adsorption capacity of the resin was determined as 80.3 mg SO₄/g resin. Concentrations of thiosalts and polythionates were also reduced to nearly zero value from 500 mg/L and 1000 mg/L, respectively. Flowrate of water had a significant effect on adsorption performance. The resin could be regenerated successfully using 2% (w/v) NaOH solution and used multiple times for water treatment.

中文翻译：

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离子交换树脂柱系统去除浮选工艺水中的硫酸盐

水化学是影响浮选性能的最重要参数之一。根据矿石的矿物学，试剂方案，研磨介质和矿井水的化学性质，各种类型的离子可以溶解并积聚在工艺用水中。通常在硫化矿石浮选中观察到基于硫的离子（硫酸根，硫代硫酸根，多硫代酸根）。这些离子的高浓度可能会降低浮选过程的效率，从而导致水垢问题。从生产用水中去除这些离子通常需要复杂的水处理厂，其投资和运营成本较高。在这项研究中，对水的部分清洁进行了研究，作为一种替代方法，它通过使用离子水将3000至3800 mg / L的高硫酸盐浓度降低至1000至1500 mg / L（大多数硫化物浮选厂可接受的浓度）的方法。交换树脂。为此，使用实验室规模的色谱柱系统进行了详细的吸附测试，以确定最适合吸附硫酸盐和硫盐的树脂类型，树脂吸附和再生的动力学。实验中使用了强碱性阴离子交换树脂（Selion SBA2000）。实验室规模研究的结果已在伊比利亚矿山的Cu-Pb-Zn浮选厂中使用较大的色谱柱装置进行了验证。结果表明，可以成功地从工艺水中去除60-70％的硫酸盐。确定该树脂的吸附能力为80.3 mg SO 树脂吸附和再生的动力学。实验中使用了强碱性阴离子交换树脂（Selion SBA2000）。实验室规模研究的结果已在伊比利亚矿山的Cu-Pb-Zn浮选厂中使用较大规模的色谱柱装置进行了验证。结果表明，可以成功地从工艺水中去除60-70％的硫酸盐。确定该树脂的吸附能力为80.3 mg SO 树脂吸附和再生的动力学。实验中使用了强碱性阴离子交换树脂（Selion SBA2000）。实验室规模研究的结果已在伊比利亚矿山的Cu-Pb-Zn浮选厂中使用较大规模的色谱柱装置进行了验证。结果表明，可以成功地从工艺水中去除60-70％的硫酸盐。确定该树脂的吸附能力为80.3 mg SO₄ /克树脂。硫盐和多硫酸盐的浓度也分别从500 mg / L和1000 mg / L降低到几乎为零。水的流量对吸附性能有重要影响。该树脂可以使用2％（w / v）NaOH溶液成功再生，并多次用于水处理。