本文介绍了以刚果(金)某铜钴矿含钴萃余液为原料制取氢氧化钴的工艺流程,包括除杂、一段沉钴、二段沉钴及沉镁工序。重点研究了一段沉钴工艺中氧化镁添加量对钴回收率、氢氧化钴产品中钴品位的影响,结果表明,氧化镁最佳添加量为1.0 t Mg...本文介绍了以刚果(金)某铜钴矿含钴萃余液为原料制取氢氧化钴的工艺流程,包括除杂、一段沉钴、二段沉钴及沉镁工序。重点研究了一段沉钴工艺中氧化镁添加量对钴回收率、氢氧化钴产品中钴品位的影响,结果表明,氧化镁最佳添加量为1.0 t MgO/tCo,此时沉钴反应终点pH为7.3,钴回收率为81.5%,氢氧化钴产品中钴品位达到最高值36.4%。按整个流程组织了工业试验,优化及稳定了工艺条件,在实际生产中最终得到了高品位、低杂质的氢氧化钴产品。展开更多
The Tuolugou cobalt deposit is the first independent large-scale Co- and Au-bearing deposit discovered in northwestern China. It is located in the eastern Kunlun orogenic belt in Qinghai Province, and occurs conformab...The Tuolugou cobalt deposit is the first independent large-scale Co- and Au-bearing deposit discovered in northwestern China. It is located in the eastern Kunlun orogenic belt in Qinghai Province, and occurs conformably in low-grade metamorphic volcano-sedimentary rock series with well-developed Na-rich hydrothermal sedimentary rocks and typical hydrothermal sedimentary ore fabrics. Fluid inclusions and isotopic geochemistry studies suggest that cobalt mineralizing fluid is dominated by NaCI-H20 system, accompanied by NaCI-CO2-H20-N2 system responsible for gold mineralization. Massive, banded and disseminated pyrite ores have similar compositions of He and Ar isotopes from the mineralizing fluid, with 3He/4He range between 0.10 to 0.31Ra (averaging 0.21Ra), and 4~Ar/36Ar between 302 and 569 (averaging 373), which reflects that Co mineralizing fluids derived dominantly from meteoric water deeply circulating. ~34S values of pyrite approaches to zero (~34S ranging from -4.5%o to +1.5%o, centering around -1.8%o to -0.2%o), reflecting its deep source. Ore lead is characterized by distinctly high radiogenesis, with 2~6pb/2~4pb〉19.279, 2~7pb/2~4pb〉15.691 and 2~spb/2~4pb〉39.627, and its values show an increase trend from country rocks, regional Paleozoic volcanic rocks to ores. This may have suggested that high radiogentic ore Pb derived mainly from country rocks by leaching meteoric water-dominated hydrothermal fluid during its circulation at depth. Cobalt occurs mainly in sulfide phase (such as pyrite), but cobalt enrichment, and presence and increasing contents of Co-bearing minerals have a positive correlation with metamorphic degree. The Tuolugou deposit and other typical strata-bound Co-Cu-Au deposits have striking similarities in the geological features and metallogenic pattern of primary cobalt. All of them are syngenetic hydrothermal exhalative sedimentation in origin.展开更多
The important strategic metal cobalt has diverse uses and the majority of world cobalt deposits have been found in China. The deposits can be classified into four types, i.e., magmatic Ni-Cu-Co sulfide deposits, hydro...The important strategic metal cobalt has diverse uses and the majority of world cobalt deposits have been found in China. The deposits can be classified into four types, i.e., magmatic Ni-Cu-Co sulfide deposits, hydrothermal and volcanogenic cobalt polymetallic deposits, strata-bound Cu-Co deposits hosted by sedimentary rocks and lateritic Ni-Co deposits, of which the former two types are the most important. There are six principal metallogenic epochs and seven important metallogenic belts according to their distribution and tectonic position. Although cobalt generally occurs in nickel-copper, copper and iron deposits as an associated metal, great developments in exploration for independent cobalt deposits have happened in China, and, in recent years, many independent deposits with different elementary assemblages and different genetic types have been discovered in the eastern part of the northern margin of the North China platform, the Central Orogenic Belt of China, western Jiangxi and northeastern Hunan. In addition, it is inferred that the Kunlun-Qinling Orogenic Belt has great potential for further exploration of new types of independent cobalt deposits.展开更多
文摘本文介绍了以刚果(金)某铜钴矿含钴萃余液为原料制取氢氧化钴的工艺流程,包括除杂、一段沉钴、二段沉钴及沉镁工序。重点研究了一段沉钴工艺中氧化镁添加量对钴回收率、氢氧化钴产品中钴品位的影响,结果表明,氧化镁最佳添加量为1.0 t MgO/tCo,此时沉钴反应终点pH为7.3,钴回收率为81.5%,氢氧化钴产品中钴品位达到最高值36.4%。按整个流程组织了工业试验,优化及稳定了工艺条件,在实际生产中最终得到了高品位、低杂质的氢氧化钴产品。
基金supported by grant no K090 1 from the Scientific Research Fund of the China Central Non-Commercial Institutethe Program of Excellent Young Scientists from the Ministry of Land and Resources(200809)+1 种基金grant No40302019 from the National Natural Science Foundation of ChinaGeological Survey Program Grant 1212011085528 from the China Geological Survey
文摘The Tuolugou cobalt deposit is the first independent large-scale Co- and Au-bearing deposit discovered in northwestern China. It is located in the eastern Kunlun orogenic belt in Qinghai Province, and occurs conformably in low-grade metamorphic volcano-sedimentary rock series with well-developed Na-rich hydrothermal sedimentary rocks and typical hydrothermal sedimentary ore fabrics. Fluid inclusions and isotopic geochemistry studies suggest that cobalt mineralizing fluid is dominated by NaCI-H20 system, accompanied by NaCI-CO2-H20-N2 system responsible for gold mineralization. Massive, banded and disseminated pyrite ores have similar compositions of He and Ar isotopes from the mineralizing fluid, with 3He/4He range between 0.10 to 0.31Ra (averaging 0.21Ra), and 4~Ar/36Ar between 302 and 569 (averaging 373), which reflects that Co mineralizing fluids derived dominantly from meteoric water deeply circulating. ~34S values of pyrite approaches to zero (~34S ranging from -4.5%o to +1.5%o, centering around -1.8%o to -0.2%o), reflecting its deep source. Ore lead is characterized by distinctly high radiogenesis, with 2~6pb/2~4pb〉19.279, 2~7pb/2~4pb〉15.691 and 2~spb/2~4pb〉39.627, and its values show an increase trend from country rocks, regional Paleozoic volcanic rocks to ores. This may have suggested that high radiogentic ore Pb derived mainly from country rocks by leaching meteoric water-dominated hydrothermal fluid during its circulation at depth. Cobalt occurs mainly in sulfide phase (such as pyrite), but cobalt enrichment, and presence and increasing contents of Co-bearing minerals have a positive correlation with metamorphic degree. The Tuolugou deposit and other typical strata-bound Co-Cu-Au deposits have striking similarities in the geological features and metallogenic pattern of primary cobalt. All of them are syngenetic hydrothermal exhalative sedimentation in origin.
基金financially supported jointly by a project of the National Natural Science Foundation of China(Grant 40302019) China Geological Survey project DKD2001027-4.
文摘The important strategic metal cobalt has diverse uses and the majority of world cobalt deposits have been found in China. The deposits can be classified into four types, i.e., magmatic Ni-Cu-Co sulfide deposits, hydrothermal and volcanogenic cobalt polymetallic deposits, strata-bound Cu-Co deposits hosted by sedimentary rocks and lateritic Ni-Co deposits, of which the former two types are the most important. There are six principal metallogenic epochs and seven important metallogenic belts according to their distribution and tectonic position. Although cobalt generally occurs in nickel-copper, copper and iron deposits as an associated metal, great developments in exploration for independent cobalt deposits have happened in China, and, in recent years, many independent deposits with different elementary assemblages and different genetic types have been discovered in the eastern part of the northern margin of the North China platform, the Central Orogenic Belt of China, western Jiangxi and northeastern Hunan. In addition, it is inferred that the Kunlun-Qinling Orogenic Belt has great potential for further exploration of new types of independent cobalt deposits.