新疆东天山成矿带是我国重要的Fe、Cu、Ni等金属成矿带之一(Mao et al.,2005;王登红等,2006),磁海铁矿床即位于东天山成矿带之南段。目前它是国内唯一产于辉绿岩中的大型铁矿床,铁矿石储量已达到1亿吨(王登红等,2007),并伴生有Co的矿化...新疆东天山成矿带是我国重要的Fe、Cu、Ni等金属成矿带之一(Mao et al.,2005;王登红等,2006),磁海铁矿床即位于东天山成矿带之南段。目前它是国内唯一产于辉绿岩中的大型铁矿床,铁矿石储量已达到1亿吨(王登红等,2007),并伴生有Co的矿化。由于其矿床地质特征的特殊性。展开更多
金山店铁矿位于湖北省大冶市金山店镇,储量约为1.33亿t,达到大型,占鄂东南地区总储量的14%。1区域地质背景鄂东南地区位于扬子地块北缘,长江中下游铁铜成矿带西段,发育大冶矿集区。区内自志留系至第四系均有出露,其中三叠纪大冶组碳盐...金山店铁矿位于湖北省大冶市金山店镇,储量约为1.33亿t,达到大型,占鄂东南地区总储量的14%。1区域地质背景鄂东南地区位于扬子地块北缘,长江中下游铁铜成矿带西段,发育大冶矿集区。区内自志留系至第四系均有出露,其中三叠纪大冶组碳盐岩和蒲圻群砂页岩为区内矽卡岩铁铜矿最重要的赋矿围岩(Pan and Dong,1999)。展开更多
程潮铁矿是长江中下游成矿带鄂东南地区最大的矽卡岩型铁矿。矿床位于鄂东南矿集区北部,成矿与早白垩世鄂城复式岩体有关,多数矿体产于早白垩世花岗岩或闪长岩与下三叠统海相沉积碳酸盐的接触带内,呈北西西向带状展布(舒全安等,1992)。...程潮铁矿是长江中下游成矿带鄂东南地区最大的矽卡岩型铁矿。矿床位于鄂东南矿集区北部,成矿与早白垩世鄂城复式岩体有关,多数矿体产于早白垩世花岗岩或闪长岩与下三叠统海相沉积碳酸盐的接触带内,呈北西西向带状展布(舒全安等,1992)。关于该矿床的成因认识主要存在矿浆成因(Zhai et al.,1996;石准立等,1981;翟裕生等,1982)和热液交代成因(Pan and Dong,1999;赵一鸣,1991;赵永鑫,1993)展开更多
Sulfuric acid leaching process was applied to extracting rare earth（RE） from roasted ore of Dechang bastnaesite in Sichuan,China.The effect of particle size,stirring speed,sulfuric acid concentration and leaching te...Sulfuric acid leaching process was applied to extracting rare earth（RE） from roasted ore of Dechang bastnaesite in Sichuan,China.The effect of particle size,stirring speed,sulfuric acid concentration and leaching temperature on RE extraction efficiency was investigated,and the leaching kinetics of RE was analyzed.Under selected leaching conditions,including particle size（0.074-0.100 mm）,sulfuric acid concentration 1.50 mol/L,mass ratio of liquid to solid 8 and stirring speed 500 r/min,the leaching kinetics analysis shows that the reaction rate of leaching process is controlled by diffusion through the product/ash layer which can be described by the shrinking-core model,and the calculated activation energy of 9.977 kJ/mol is characteristic for a diffusion-controlled process.展开更多
The leaching kinetics of bastnaesite concentrate in HCl solution was investigated with respect to the effects of HCl concentration by changing HCl concentration,leaching temperature,liquid to solid ratio,and particle ...The leaching kinetics of bastnaesite concentrate in HCl solution was investigated with respect to the effects of HCl concentration by changing HCl concentration,leaching temperature,liquid to solid ratio,and particle size.A particle size of 25 μm was required to leach 89.6% RE2（CO3）3 and 1.5%REF3 at 90 ℃ for 90 min,when HCl concentration was 6 mol/L and liquid to solid ratio was 15：1.The leaching kinetics of bastnaesite concentrate is represented by shrinking core model with diffusion through a porous product layer.The activation energies for the dissolution reaction of RE2（CO3）3 and REF3 were calculated to be 59.39 kJ/mol and 66.13 kJ/mol respectively.展开更多
文摘金山店铁矿位于湖北省大冶市金山店镇,储量约为1.33亿t,达到大型,占鄂东南地区总储量的14%。1区域地质背景鄂东南地区位于扬子地块北缘,长江中下游铁铜成矿带西段,发育大冶矿集区。区内自志留系至第四系均有出露,其中三叠纪大冶组碳盐岩和蒲圻群砂页岩为区内矽卡岩铁铜矿最重要的赋矿围岩(Pan and Dong,1999)。
文摘程潮铁矿是长江中下游成矿带鄂东南地区最大的矽卡岩型铁矿。矿床位于鄂东南矿集区北部,成矿与早白垩世鄂城复式岩体有关,多数矿体产于早白垩世花岗岩或闪长岩与下三叠统海相沉积碳酸盐的接触带内,呈北西西向带状展布(舒全安等,1992)。关于该矿床的成因认识主要存在矿浆成因(Zhai et al.,1996;石准立等,1981;翟裕生等,1982)和热液交代成因(Pan and Dong,1999;赵一鸣,1991;赵永鑫,1993)
基金Project(NDRC high-tech No.606,2009) supported by the Major Industries Technological Development Special Fund of Development and Reform Commission,ChinaProject(50934004) supported by the National Natural Science Foundation of China
文摘Sulfuric acid leaching process was applied to extracting rare earth（RE） from roasted ore of Dechang bastnaesite in Sichuan,China.The effect of particle size,stirring speed,sulfuric acid concentration and leaching temperature on RE extraction efficiency was investigated,and the leaching kinetics of RE was analyzed.Under selected leaching conditions,including particle size（0.074-0.100 mm）,sulfuric acid concentration 1.50 mol/L,mass ratio of liquid to solid 8 and stirring speed 500 r/min,the leaching kinetics analysis shows that the reaction rate of leaching process is controlled by diffusion through the product/ash layer which can be described by the shrinking-core model,and the calculated activation energy of 9.977 kJ/mol is characteristic for a diffusion-controlled process.
基金Project(50974042)supported by the National Natural Science Foundation of ChinaProject(20090042120015)supported by Scientific Research Special Foundation of Doctor Subject of Chinese UniversitiesProject(N090302007)supported by the Fundamental Research Funds for the Central Universities,China
文摘The leaching kinetics of bastnaesite concentrate in HCl solution was investigated with respect to the effects of HCl concentration by changing HCl concentration,leaching temperature,liquid to solid ratio,and particle size.A particle size of 25 μm was required to leach 89.6% RE2（CO3）3 and 1.5%REF3 at 90 ℃ for 90 min,when HCl concentration was 6 mol/L and liquid to solid ratio was 15：1.The leaching kinetics of bastnaesite concentrate is represented by shrinking core model with diffusion through a porous product layer.The activation energies for the dissolution reaction of RE2（CO3）3 and REF3 were calculated to be 59.39 kJ/mol and 66.13 kJ/mol respectively.
