某铜钼浮选分离废水的化学沉淀—絮凝沉降试验

发布时间：2019-04-16 14:51

【摘要】：云南某铜矿铜钼浮选分离废水硫、氟含量非常高,直接回用严重影响铜钼混合浮选指标。试验采用化学沉淀—絮凝沉降法处理该废水,考察了沉淀剂用量、搅拌反应时间对废水脱硫、脱氟的影响,絮凝剂种类、用量、p H值对反应后废水絮凝效果的影响,并对处理前后废水的回用情况进行了对比。研究表明:在废水初始p H=12.5,硫沉淀剂绿矾用量为83.33 g/L,氟沉淀剂石灰用量为40 g/L,搅拌反应时间为60 min情况下,硫去除率为93.37%,氟去除率为98.52%;新型絮凝剂M5250用量为50 mg/L时,澄清水的浊度为8.1 FTU。处理后的铜钼分离废水部分回用于矿石的磨矿和铜钼混浮作业,可明显改善铜钼混浮效果。因此,化学沉淀—絮凝沉降工艺在处理某铜钼分离废水中的硫和氟方面,具有简单、快速、高效的特征,经济效益和环境效益显著。
[Abstract]:Copper-molybdenum flotation wastewater from a copper mine in Yunnan Province has a very high sulfur and fluorine content, which has a serious impact on the flotation index of copper-molybdenum mixed flotation by direct reuse of copper and molybdenum. The chemical precipitation-flocculation precipitation method was used to treat the wastewater. The effects of the dosage of precipitator, the stirring reaction time on the desulphurization and defluorination of the wastewater, the type and dosage of flocculant and the pH value on the flocculation effect of the wastewater after the reaction were investigated. The reuse of wastewater before and after treatment was compared. The results show that the removal rate of sulfur is 93.37% when the initial pH of wastewater is 12.5, the dosage of sulfur precipitator is 83.33 g / L, the dosage of fluoride precipitator lime is 40 g / L, the stirring time is 60 min, the removal rate of sulfur is 93.37%. The fluoride removal rate was 98.52%; When the dosage of new flocculant M5250 is 50 mg/L, the turbidity of clarified water is 8.1 FTU.. The treated Cu-Mo separation wastewater can be used partly for grinding and mixed flotation of ores, which can obviously improve the flotation effect of Cu-Mo. Therefore, the chemical precipitation-flocculation sedimentation process is simple, rapid and efficient in the treatment of sulfur and fluorine in a copper-molybdenum separation wastewater. The economic and environmental benefits are remarkable.
【作者单位】：云南迪庆有色金属有限责任公司;北京科技大学土木与资源工程学院;金属矿山高效开采与安全教育部重点实验室;
【分类号】：X753

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