A new technique for the flotation separation of lead zinc iron sulfide ores has been developed and applied to several mills in China. It is characterized by the matching of relationships among pulp pH, pulp potential,...A new technique for the flotation separation of lead zinc iron sulfide ores has been developed and applied to several mills in China. It is characterized by the matching of relationships among pulp pH, pulp potential, flotation collector inside grinding mill. The flotation separation of galena and sphalerite has been accomplished without the addition of any conventional depressant of sphalerite such as zinc sulphate. Lime is used as a regulator and stabilizer of pulp pH and potential. Diethyldithiocarbamate (DDTC), not xanthate, is determined as a collector for the selective flotation of galena from the Pb Zn Fe sulfide ores. The laboratory scale tests, the plant scale tests and the plant operations have all shown that the best separation results can be achieved at pH of 12.4～12.6, the pulp potential of 160～180 mV. The operation practice in the four plants has confirmed that compared with conventional flotation flowsheet, our new technology can greatly improve the flotation results, reduce the flotation time and the number of flotation cell, and increase the stability of operation and the adaptability to changes in ore properties. All these advantages have made this four plants more profitable.展开更多
The Jinchuan deposit is hosted by the olivine-rich ultramafic rock body, which is the thirdlargest magmatic sulfide Ni-Cu deposit in the world currently being exploited. Seeking new relaying resources in the deep and ...The Jinchuan deposit is hosted by the olivine-rich ultramafic rock body, which is the thirdlargest magmatic sulfide Ni-Cu deposit in the world currently being exploited. Seeking new relaying resources in the deep and the border of the deposit becomes more and more important. The ore body, ore and geochemistry characteristics of the concealed Cu-rich ore body are researched. Through spatial analysis and comparison with the neighboring II1 main ore body, the mineralization rule of the concealed Cu-rich ore body is summed up. It is also implied that Cu-rich magma may exist between Nirich magma and ore pulp during liquation differentiation in deep-stage chambers, which derives from deep-mantle Hi-MgO basalt magma. It is concluded that the type of ore body has features of both magmatic liquation and late reconstruction action. It has experienced three stages： deep liquation and pulsatory injection of the Cu- and PPGE-rich magma, concentration of tectonic activation, and the later magma hydrothermal superimposition. In addition, the Pb and S isotopes indicate the magma of I6 concealed Cu-rich ore body originates predominantly from mantle; however, it is interfused by minute crust material. Finally, it is inferred that the genesis of the Cu-Ni sulfide deposit is complex and diverse, and the prospect of seeking new deep ore bodies within similar deposits is promising, especially Cu-rich ore bodies.展开更多
Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore...Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore from Yunnan Province, China, was investigated. The results show that free gold and auriferous sulfides account for 94.99 % of total gold. Without adding organic acid in floatation, only 82 % recovery of gold could be obtained.Gold recovery in Au/Pb concentrates increases by 9.29 %with oxalate added and by 7.35 % with citric acid added,respectively, while performances of lead and arsenic nearly keep a constant. A possible reason is that free gold is of wonderful selectivity against pyrite with organic activators.A new method to enhance gold recovery is proposed.展开更多
文摘A new technique for the flotation separation of lead zinc iron sulfide ores has been developed and applied to several mills in China. It is characterized by the matching of relationships among pulp pH, pulp potential, flotation collector inside grinding mill. The flotation separation of galena and sphalerite has been accomplished without the addition of any conventional depressant of sphalerite such as zinc sulphate. Lime is used as a regulator and stabilizer of pulp pH and potential. Diethyldithiocarbamate (DDTC), not xanthate, is determined as a collector for the selective flotation of galena from the Pb Zn Fe sulfide ores. The laboratory scale tests, the plant scale tests and the plant operations have all shown that the best separation results can be achieved at pH of 12.4～12.6, the pulp potential of 160～180 mV. The operation practice in the four plants has confirmed that compared with conventional flotation flowsheet, our new technology can greatly improve the flotation results, reduce the flotation time and the number of flotation cell, and increase the stability of operation and the adaptability to changes in ore properties. All these advantages have made this four plants more profitable.
基金supported by the National Science and Technology Support Project of China (No.2006BAB01B08)
文摘The Jinchuan deposit is hosted by the olivine-rich ultramafic rock body, which is the thirdlargest magmatic sulfide Ni-Cu deposit in the world currently being exploited. Seeking new relaying resources in the deep and the border of the deposit becomes more and more important. The ore body, ore and geochemistry characteristics of the concealed Cu-rich ore body are researched. Through spatial analysis and comparison with the neighboring II1 main ore body, the mineralization rule of the concealed Cu-rich ore body is summed up. It is also implied that Cu-rich magma may exist between Nirich magma and ore pulp during liquation differentiation in deep-stage chambers, which derives from deep-mantle Hi-MgO basalt magma. It is concluded that the type of ore body has features of both magmatic liquation and late reconstruction action. It has experienced three stages： deep liquation and pulsatory injection of the Cu- and PPGE-rich magma, concentration of tectonic activation, and the later magma hydrothermal superimposition. In addition, the Pb and S isotopes indicate the magma of I6 concealed Cu-rich ore body originates predominantly from mantle; however, it is interfused by minute crust material. Finally, it is inferred that the genesis of the Cu-Ni sulfide deposit is complex and diverse, and the prospect of seeking new deep ore bodies within similar deposits is promising, especially Cu-rich ore bodies.
基金financially supported by the National Natural Science Foundation of China(No.51374247)
文摘Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore from Yunnan Province, China, was investigated. The results show that free gold and auriferous sulfides account for 94.99 % of total gold. Without adding organic acid in floatation, only 82 % recovery of gold could be obtained.Gold recovery in Au/Pb concentrates increases by 9.29 %with oxalate added and by 7.35 % with citric acid added,respectively, while performances of lead and arsenic nearly keep a constant. A possible reason is that free gold is of wonderful selectivity against pyrite with organic activators.A new method to enhance gold recovery is proposed.
