摘要
采用单矿物浮选试验研究了在溶液pH值为4时,三种粒级的白云石在捕收剂LA浓度不同和转速不同条件下的累计回收率随浮选时间的变化规律。结果表明,提高转速和LA的浓度对粗粒级白云石的回收率具有重要影响,对于中间粒级白云石的浮选回收率影响不大,但能显著缩短浮选平衡时间,中间粒级的白云石累计回收率最高可达99.00%。采用四种经典动力学模型对试验数据进行拟合,结果表明白云石的浮选过程更加符合一级动力学模型,不同转速和不同浓度LA条件的拟合优度R^2均大于0.96。
By single mineral flotation experiment,the variation rules of the cumulative recovery of dolomite of three different sizes with different concentration of collector LA and different rotating speed at solution pH=4 were studied.The experimental results show that the increase of rotation speed and concentration of LA had an important effect on the recovery of coarse size dolomite and little effect on the recovery of intermediate size dolomite,but it could significantly shorten the flotation balance time.Under the experimental conditions,the accumulative recovery of intermediate size dolomite was up to 99.00%.Four classical kinetic models were used to fit the test data.The fitting results show that the flotation process of dolomite was more in line with the first-order kinetic model.The goodness of fit R^2 under different rotation speed and concentration of LA were all greater than 0.96.
作者
张汉泉
周峰
许鑫
肖林波
金艳锋
余洪
ZHANG Han-quan;ZHOU Feng;XU Xin;XIAO Lin-bo;JIN Yan-feng;YU Hong(School of Resources&Safety Engineering,Wuhan Institute of Technology,Wuhan 430074,China;Hubei Sanning Chemical Co.Ltd.,Zhijiang 443206,Hubei,China)
出处
《矿冶》
CAS
2020年第2期22-27,共6页
Mining And Metallurgy
关键词
白云石
粒度
浮选动力学
dolomite
granularity
flotation kinetic
