In this work,the reflux classifier with closely spaced inclined channels is used as the pre-concentration facility to improve the separation efficiency before the shaking table separation.Three operating parameters of...In this work,the reflux classifier with closely spaced inclined channels is used as the pre-concentration facility to improve the separation efficiency before the shaking table separation.Three operating parameters of reflux classifier(RC)to pre-concentrate fine(0.023−0.15 mm)tailings of antimony oxide were optimized by response surface methodology(RSM)using a three-level Box-Behnken design(BBD).The parameters studied for the optimization were feeding speed,underflow,and ascending water speed.Second-order response functions were produced for the Sb grade and recovery rate of the concentrate.Taking advantage of the quadratic programming,when the factors of feeding,underflow and ascending water are respectively 225,30 and 133 cm^3/min,a better result can be achieved for the concentrate grade of 2.31% and recovery rate of 83.17%.At the same time,70.48% of the tailings with the grade of 0.20% were discarded out of the feeding.The results indicated that the reflux classifier has a good performance in dealing with fine tailings of antimony oxide.Moreover,second-order polynomial equations,ANOVA,and three-dimensional surface plots were developed to evaluate the effects of each parameter on Sb grade and recovery rate of the concentrate.展开更多
采用自制实验室型逆流分选柱对褐铁矿型红土镍矿进行了预富集试验研究。结果表明,给矿流量200 m L/min(矿浆浓度为10%)、上升水流量250 m L/min、底流与溢流流量比1∶8时,底流产品中Cr品位为2.5%、Cr回收率为26.7%,溢流产品中Ni品位0.85...采用自制实验室型逆流分选柱对褐铁矿型红土镍矿进行了预富集试验研究。结果表明,给矿流量200 m L/min(矿浆浓度为10%)、上升水流量250 m L/min、底流与溢流流量比1∶8时,底流产品中Cr品位为2.5%、Cr回收率为26.7%,溢流产品中Ni品位0.85%、Ni回收率79%。使用商业软件Fluent针对逆流分选柱的上升水流量、底流-溢流流量比进行了流场模拟分析,结果表明,在与试验条件相同的参数下,增大上升水流量、减小底流与溢流流量比,可以获得较为理想的分选效果,这与试验结果体现的规律一致。逆流分选柱可以用于红土镍矿的重选预富集工作。展开更多
基金Project(2015SK20792)supported by Key Province Key Technology Research and Development Program of the Ministry of Science and Technology of Hunan,ChinaProjects(2019zzts703,2020zzts740,2020zzts202)supported by the Fundamental Research Funds for the Central Universities of ChinaProject(2020P4FZG03A)supported by State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,China。
文摘In this work,the reflux classifier with closely spaced inclined channels is used as the pre-concentration facility to improve the separation efficiency before the shaking table separation.Three operating parameters of reflux classifier(RC)to pre-concentrate fine(0.023−0.15 mm)tailings of antimony oxide were optimized by response surface methodology(RSM)using a three-level Box-Behnken design(BBD).The parameters studied for the optimization were feeding speed,underflow,and ascending water speed.Second-order response functions were produced for the Sb grade and recovery rate of the concentrate.Taking advantage of the quadratic programming,when the factors of feeding,underflow and ascending water are respectively 225,30 and 133 cm^3/min,a better result can be achieved for the concentrate grade of 2.31% and recovery rate of 83.17%.At the same time,70.48% of the tailings with the grade of 0.20% were discarded out of the feeding.The results indicated that the reflux classifier has a good performance in dealing with fine tailings of antimony oxide.Moreover,second-order polynomial equations,ANOVA,and three-dimensional surface plots were developed to evaluate the effects of each parameter on Sb grade and recovery rate of the concentrate.
文摘采用自制实验室型逆流分选柱对褐铁矿型红土镍矿进行了预富集试验研究。结果表明,给矿流量200 m L/min(矿浆浓度为10%)、上升水流量250 m L/min、底流与溢流流量比1∶8时,底流产品中Cr品位为2.5%、Cr回收率为26.7%,溢流产品中Ni品位0.85%、Ni回收率79%。使用商业软件Fluent针对逆流分选柱的上升水流量、底流-溢流流量比进行了流场模拟分析,结果表明,在与试验条件相同的参数下,增大上升水流量、减小底流与溢流流量比,可以获得较为理想的分选效果,这与试验结果体现的规律一致。逆流分选柱可以用于红土镍矿的重选预富集工作。
