电解铝废阴极炭的浮选条件优化

发布时间：2018-05-19 22:32

本文选题：电解铝废阴极 + 浮选　；参考：《轻金属》2017年09期

【摘要】：为有效回收电解铝废阴极中的炭,本文首先利用扫描电镜及电子能谱仪得到了废阴极的表面形貌及其元素组成,然后通过单因素试验研究了样品粒径、矿浆浓度、充气量、浮选机主轴转速、刮板速度、加药前空搅时间、抑制剂投加量等因素对浮选效果的影响,然后以炭的回收率为评价指标,利用正交试验进一步优化了浮选条件。结果表明:废阴极平均含炭量为20.455%;样品粒径、矿浆浓度、充气量、浮选机主轴转速、刮板速度等因素对浮选效果影响较大;最佳浮选条件为粒径120~140目、矿浆浓度15%、主轴转速2200r/min、充气量0.25m~3/h、刮板速度20r/min,此浮选条件下炭回收率可达78.18%。
[Abstract]:In order to recover effectively the carbon from the waste cathode of electrolytic aluminum, the surface morphology and elemental composition of the waste cathode were obtained by scanning electron microscope (SEM) and electron energy spectrometer (EDS), and the particle size, slurry concentration and aeration volume of the waste cathode were studied by single factor test. The factors such as the spindle speed of flotation machine, the speed of scraper, the time of stirring before adding medicine, and the dosage of depressant have influence on the flotation effect. Then the flotation conditions are further optimized by orthogonal test with the carbon recovery rate as the evaluation index. The results show that the average carbon content of waste cathode is 20.455, sample diameter, slurry concentration, aeration rate, spindle speed of flotation machine, scraper speed and other factors have great influence on flotation effect, and the optimum flotation conditions are 120 ~ (140) mesh diameter. The pulp concentration is 15, the spindle speed is 2200r / min, the aeration rate is 0.25mg / h, and the scraper speed is 20r / min. Under this flotation condition, the recovery rate of carbon can reach 78.18%.
【作者单位】：兰州交通大学环境与市政工程学院;嘉峪关澄宇金属材料有限责任公司;
【基金】：国家自然科学基金(No.31560234)
【分类号】：TD923;TD97

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