有色金属科学与工程Issue(4)：1-5,75,6.DOI:10.13264/j.cnki.ysjskx.2015.04.001
铅阳极泥剪切射流曝气强化碱浸脱砷工艺研究
Enhanced alkaline leaching of arsenic in lead anode slime using shearing jet aeration reactor
摘要
Abstract
In this study, alkaline leaching enhanced by shearing jet aeration reactor was employed to remove arsenic from lead anode sline. The effects of various parameters, such as liquid/solid ratio, concentrations of sodium hydroxide solution, leaching time and temperature, on leaching ratios of different metals were investi-gated. On this basis, the optimal conditions was obtained through orthogonal experiment, namely, 1.0 mol/L NaOH, a liquid/solid ratio of 6∶1, leaching at 70 ℃ for 1 h. Under this optimal condition, the leaching rate of As reached up to 95.0 %, and that of Pb and Sb was less than 2.0 % and 1.0 %, respectively, while Bi was hardly dissolved in alkaline solution. In addition, arsenic-containing leachate could be treated with lime and removal rate of As in leachate exceeding 85 %. Then, the filtrate from lime precipitation was recycled and reused in leaching process. Also, a satisfying result could be obtained with more than 95%of As leaching rate after the filtrate was recycled. Compared with the conventional alkaline leaching for As removal, this process could decrease the dosage of sodium hydroxide, shorten the leaching time, and efficiently improve the separa-tion rate of arsenic and other valuable metals. It can be concluded that the shearing jet aeration reactor can be applied to the pretreatment of arsenic-containing materials and obtain a high leaching rate of arsenic.关键词
铅阳极泥/剪切/射流曝气/碱浸/脱砷Key words
lead anode slime/shear/jet aeration/alkaline leaching/arsenic removal分类
矿业与冶金引用本文复制引用
闵小波,周波生,柴立元,梁彦杰,柯勇,赵宗文,沈忱..铅阳极泥剪切射流曝气强化碱浸脱砷工艺研究[J].有色金属科学与工程,2015,(4):1-5,75,6.基金项目
国家自然科学基金资助项目（51474247）；国家公益性行业科研专项（201509050）；湖南省科技重大专项 （）
