The composition of a collector directly affects its collecting performance in mineral flotation.In this study,three vegetable oils were used as the collectors,the flotation performance of scheelite and the differentia...The composition of a collector directly affects its collecting performance in mineral flotation.In this study,three vegetable oils were used as the collectors,the flotation performance of scheelite and the differential analysis were studied through flotation experiments,zeta potential,contact angle measurement and Fourier transform infrared spectrum(FTIR)analysis.Flotation results show that the recovery of scheelite increases in the order of oleic acid<rapeseed oil<rice bran oil<soybean oil,especially in the pH range of 5-8.The distinction in the scheelite recovery is due to the different compositions of these collectors.The addition of LA,LNA and PA(<5%)can increase the recovery of scheelite with OA,but the addition of SA deteriorates the scheelite flotation.Results of zeta potential,contact angle measurement and FTIR analysis indicate that the collector adsorption on scheelite surface is enhanced when using the three vegetable oils.For the raw ore with 0.086%WO3,a rough concentrate containing 1.423%WO3 with the recovery of 84.22%is obtained using soybean oil as the collector.展开更多
During the excavation to the Jiahu Site in 2013,systematic and comprehensive floatation work was conducted,by which over 6000 samples of charred plant remians belonging to rice,wild soybeanV,itis,water chestnut,acorn,...During the excavation to the Jiahu Site in 2013,systematic and comprehensive floatation work was conducted,by which over 6000 samples of charred plant remians belonging to rice,wild soybeanV,itis,water chestnut,acorn,Chinese hickory,lotus root,etc.have been fteched.These samples provided new data for our researche s on the plant food pattern of the people in the Jiahu Site.The analysis results on the remains of rice rachilla,starch residue and phytoliths showed that the main resource of the pnlat food of the residents of Jiahu Site was still edible wi ld plants,and the domesticated rice was increasing along with th etime;the harvesting methods of the Jiahu Site migh t have experienced the change from beating(stripping)to cutting(pinching).The dating results of the charred wheat and millet unearthed at this site excluded the possibility of the xeistence of dry farming crops such as millet and broomcor n in Jiahu Site,which might give some enlightenment to the paleoethnobotanical study.展开更多
基金Project(2016RS2016) supported by Provincial Science and Technology Leader Program,Hunan,ChinaProject(2017zzts807) supported by Postgraduate Innovative Research Projects of Central South University,China
文摘The composition of a collector directly affects its collecting performance in mineral flotation.In this study,three vegetable oils were used as the collectors,the flotation performance of scheelite and the differential analysis were studied through flotation experiments,zeta potential,contact angle measurement and Fourier transform infrared spectrum(FTIR)analysis.Flotation results show that the recovery of scheelite increases in the order of oleic acid<rapeseed oil<rice bran oil<soybean oil,especially in the pH range of 5-8.The distinction in the scheelite recovery is due to the different compositions of these collectors.The addition of LA,LNA and PA(<5%)can increase the recovery of scheelite with OA,but the addition of SA deteriorates the scheelite flotation.Results of zeta potential,contact angle measurement and FTIR analysis indicate that the collector adsorption on scheelite surface is enhanced when using the three vegetable oils.For the raw ore with 0.086%WO3,a rough concentrate containing 1.423%WO3 with the recovery of 84.22%is obtained using soybean oil as the collector.
文摘During the excavation to the Jiahu Site in 2013,systematic and comprehensive floatation work was conducted,by which over 6000 samples of charred plant remians belonging to rice,wild soybeanV,itis,water chestnut,acorn,Chinese hickory,lotus root,etc.have been fteched.These samples provided new data for our researche s on the plant food pattern of the people in the Jiahu Site.The analysis results on the remains of rice rachilla,starch residue and phytoliths showed that the main resource of the pnlat food of the residents of Jiahu Site was still edible wi ld plants,and the domesticated rice was increasing along with th etime;the harvesting methods of the Jiahu Site migh t have experienced the change from beating(stripping)to cutting(pinching).The dating results of the charred wheat and millet unearthed at this site excluded the possibility of the xeistence of dry farming crops such as millet and broomcor n in Jiahu Site,which might give some enlightenment to the paleoethnobotanical study.