The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size...The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.展开更多
对铬冶炼产物进行了回收金属铬的选矿试验研究。试验结果表明,金属铬块适宜的分选工艺为"煤油反浮选-强磁选"联合工艺流程。在磨矿细度为-0.074 mm 8.43%时,以煤油为捕收剂,松醇油为起泡剂,经一次粗选一次精选反浮选脱炭,一...对铬冶炼产物进行了回收金属铬的选矿试验研究。试验结果表明,金属铬块适宜的分选工艺为"煤油反浮选-强磁选"联合工艺流程。在磨矿细度为-0.074 mm 8.43%时,以煤油为捕收剂,松醇油为起泡剂,经一次粗选一次精选反浮选脱炭,一次强磁选脱除三氧化二铬,最终可获得综合金属铬精矿的金属铬品位为97.16%,回收率为62.29%,满足高质量金属铬精矿的品质要求。展开更多
基金financial supports from the National Natural Science Foundation of China(No.52074206)the Talent Science and Technology Fund of Xi’an University of Architecture and Technology,China(No.ZR19062)+4 种基金the Open Foundation of State Key Laboratory of Mineral Processing,China(No.BGRIMM-KJSKL-2021-19)the Natural Science Basic Research Plan in Shaanxi Province of China(No.2021JQ-507)the Special Research Project of Shaanxi Education Department,China(No.21JK0731)the Key Program for International S&T Cooperation Projects of Shaanxi Province,China(No.2021KWZ-16)the Natural Science Foundation of Qinghai Province,China(No.2021-ZJ-975Q)。
文摘The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.
文摘对铬冶炼产物进行了回收金属铬的选矿试验研究。试验结果表明,金属铬块适宜的分选工艺为"煤油反浮选-强磁选"联合工艺流程。在磨矿细度为-0.074 mm 8.43%时,以煤油为捕收剂,松醇油为起泡剂,经一次粗选一次精选反浮选脱炭,一次强磁选脱除三氧化二铬,最终可获得综合金属铬精矿的金属铬品位为97.16%,回收率为62.29%,满足高质量金属铬精矿的品质要求。
