Xianghualing ore field is located in Lingwu County, Hunan Province. It lies on the in-tersection of poly-set structures and belongs to nonferrous rare-polymetal minetalization se-ries related to the crust-origin grani...Xianghualing ore field is located in Lingwu County, Hunan Province. It lies on the in-tersection of poly-set structures and belongs to nonferrous rare-polymetal minetalization se-ries related to the crust-origin granite in activation region. The strata of the ore field in-volves Cambrian (∈), Devonian (D) and Carboniferous (C), in which Cambrian epimeta-morphic sand stone, D<sub>2t</sub> sand stone and D<sub>2q</sub>-D(3x) dolomite are consided as the ore source-bed ofthe ore deposit. Several high-replacemental stocks, which lie above the hidden granitebatholith with NNW trending, intrude along the intersection of NW and NE trending faults.展开更多
As China's most important gold-producing district, the Jiaodong Peninsula also contains copper, lead-zinc, molybdenum (tungsten), and other nonferrous metal ore deposits, but the space-time and genetic relationship...As China's most important gold-producing district, the Jiaodong Peninsula also contains copper, lead-zinc, molybdenum (tungsten), and other nonferrous metal ore deposits, but the space-time and genetic relationships with gold deposits remain uncertain. To investigate the temporal relationship between these nonferrous metal and gold ore deposits, We collected the samples from a number of nonferrous metallic and silver deposits and metallogenetic rock bodies in the eastern Jiaodong Peninsula for isotopic dating. The results show that the Re-Os isotopic model ages of the Lengjia molybdenum deposit in Rongcheng range from 114.5 ± 1.8 Ma to 112.6 ± 1.5 Ma, with an average age of 113.6 ± 1.6 Ma; the LA-ICP-MS ^206pb/^238U ages of 33 zircons in the sericitization porphyritic monzogranite that hosts the Tongjiazhuang silver deposit in Rongcheng range between 122 Ma and 109 Ma, with a weighted mean age of 116.04 ± 0.95 Ma; the LA-ICP-MS ^206pb/^238U ages of 31 zircons in the copper metallogenic pyroxene monzodiorite that hosts the Kuangbei copper deposit in Rongcheng range from 126 Ma to 106 Ma, with a weighted mean age of 116.6 ± 1.7 Ma; and the LA-ICP-MS ^206pb/^238U ages of 19 zircons in the pyroxene monzodiorite surrounding the Dadengge gold and multimetal deposit in Weihai range from 113 Ma to 110 Ma, with a weighted mean age of 111.7 ± 0.6 Ma. All these results indicate that the metallogenic ages of the silver and nonferrous metallic deposits in the Jiaodong Peninsula are in a limited range from 118 Ma to 111 Ma. Previous studies have demonstrated that the isotopic ages of gold deposits in the Jiaodong Peninsula range from 123 Ma to 110 Ma, while Weideshanian magmatism occurred between 126 Ma to 108 Ma. Both these ranges are grossly consistent with the metallogenic ages of silver and nonferrous metallic deposits in this study, suggesting that the large-scale mineralization occurred in the Early Cretaceous when magmatic activities were strong. This epoch may be linked to the lithosphere thinning and the thermo-upwelling extension in eastern China at that time. In addition, field investigation also shows that gold and nonferrous metallic deposits are distributed nearby the Weideshanian granite, with the nonferrous metallic deposits lying within or surrounding the granite pluton and the gold deposits outside the granite pluton. We propose the following mineralization scenario: In the Early Cretaceous, an intensive lithospheric extension induced partial melting and degassing of the metasomatized lithospheric mantle, which resulted in the formation of mantle-derived fluids enriched in metal elements. During the rapid process of magma ascent and intrusion, crust-derived fluids were activated by the magmatic thermal dome and served to further extract ore-forming materials from the crust. These fluids may have mixed with the mantle-derived fluid to form a crust-mantle mixing-type ore-forming fluid. The high-temperature conditions in the center or in contact with the granitic magmatic thermal dome would have been favorable for the formation of porphyry-type, skarn-type, and hydrothermal-vein-type ores, thus forming a series of Mo(W), Cu, and Pb-Zn deposits in the mid-eastern Jiaodong Peninsula. In contrast, the medium- to low-temperature conditions in the periphery of the magmatic thermal dome would have favored the deposition of gold (silver) ores under the appropriate physiochemical and structural conditions. The metaliogenic epoch of the molybdenum, copper, and silver deposits, and their spatio-temporal and genetic relations to the gold deposits, as demonstrated in this study, not only provide important insights to the study of regional metallogeny, our understanding of the metallogenesis of the Jiaodong type gold deposit, and the geodynamic background of the large-scale mineralization in the Jiaodong Peninsula, but also have practical value in guiding the mineral exploration.展开更多
Environmental exposure to heavy metals has been linked to a wide range of human health hazards. We detected the levels of 15 metals in urine samples from 500 representative sub-samples in an ongoing occupational cohor...Environmental exposure to heavy metals has been linked to a wide range of human health hazards. We detected the levels of 15 metals in urine samples from 500 representative sub-samples in an ongoing occupational cohort study (Jinchang Cohort) to directly evaluate metal exposure levels. Fifteen metals, namely As, Ba, Be, Cd, Cs, Cr, Co, Cu, Pb, Mn, Ni, Se, TI, U, and Zn, were detected by inductively coupled plasma quadruple mass spectrometry. The results showed that median creatinine adjustment and geometric mean urinary metal levels were higher in the heavy metal-exposed group, except Se and Zn, than other reported general or occupational populations. Further studies should address the effects of heavy metals on human health.展开更多
The nonferrous metallurgical(NFM)industry is a cornerstone industry for a nation’s economy.With the development of artificial technologies and high requirements on environment protection,product quality,and productio...The nonferrous metallurgical(NFM)industry is a cornerstone industry for a nation’s economy.With the development of artificial technologies and high requirements on environment protection,product quality,and production efficiency,the importance of applying smart manufacturing technologies to comprehensively percept production states and intelligently optimize process operations is becoming widely recognized by the industry.As a brief summary of the smart and optimal manufacturing of the NFM industry,this paper first reviews the research progress on some key facets of the operational optimization of NFM processes,including production and management,blending optimization,modeling,process monitoring,optimization,and control.Then,it illustrates the perspectives of smart and optimal manufacturing of the NFM industry.Finally,it discusses the major research directions and challenges of smart and optimal manufacturing for the NFM industry.This paper will lay a foundation for the realization of smart and optimal manufacturing in nonferrous metallurgy in the future.展开更多
The 13th China International Diecasting Congress & Exhibition(CHINA DIECASTING 2018) and 2018 China NonferrousAlloys & Special Casting Exhibition (CHINA NONFERROUS2018) were held concurrently July 18-20 at Shang...The 13th China International Diecasting Congress & Exhibition(CHINA DIECASTING 2018) and 2018 China NonferrousAlloys & Special Casting Exhibition (CHINA NONFERROUS2018) were held concurrently July 18-20 at Shanghai NewInternational Expo Centre. The events were co-organized bythe Foundry Institution of Chinese Mechanical EngineeringSociety (FICMES), Shenyang Zhongzhu Foundry ProductivityPromotion Center Co., Ltd. (FPC) and the State Key Laboratoryof Light Alloys Casting Technologies for High-end Equipment.展开更多
The new magnetic-assisted abrasive polishing process for non-ferrous materials was proposed in order to increase the magnetic flux density which directly influences the contact force between the workpiece and the abra...The new magnetic-assisted abrasive polishing process for non-ferrous materials was proposed in order to increase the magnetic flux density which directly influences the contact force between the workpiece and the abrasives.The permanent magnets were installed under the workpiece and their effects were verified by the experiments.The effect of polishing factors on the improvement of surface roughness was evaluated based on the Taguchi experimental method,and the optimal conditions for polishing AISI316 stainless steel were determined.The predicting model for improving surface roughness was developed and the validity of the developed model was tested.The results show that the permanent magnets are very useful in improving the surface roughness in the magnetic-assisted abrasive polishing process.展开更多
Our research and investigation proves thatthe growth rate of the productivity of thenonferrous metals industry is much lower thanthat of investment,and that the potential for in-creasing productivity iS very grear,in ...Our research and investigation proves thatthe growth rate of the productivity of thenonferrous metals industry is much lower thanthat of investment,and that the potential for in-creasing productivity iS very grear,in spite of thecompplicated influence of multiple weak joints re-strieting the increase of the productivity.To solvethese problems,following policies should展开更多
The definition of a plain bearing is given.The requirements for bearing materials are pro-posed.The historical perspective and recent development of the bearing materials are intro-duced,and the performances of curren...The definition of a plain bearing is given.The requirements for bearing materials are pro-posed.The historical perspective and recent development of the bearing materials are intro-duced,and the performances of current bearing materials are展开更多
The productivity of China’s nonferrous metals industry during 1980-1990 has been analysed. The important factors which constrain the productivity of the nonferrous metals industry have been studied, the methods of im...The productivity of China’s nonferrous metals industry during 1980-1990 has been analysed. The important factors which constrain the productivity of the nonferrous metals industry have been studied, the methods of improving the productivity of the nonferrous metals industry have been discussed.展开更多
Founded in January of 1984,China National Nonferrous Metals Import and Export Corporation(CNIEC)is a combined industrial and trading subsidiary of China National Nonferrous Metals Industry Corporation(CNNC).Establishe...Founded in January of 1984,China National Nonferrous Metals Import and Export Corporation(CNIEC)is a combined industrial and trading subsidiary of China National Nonferrous Metals Industry Corporation(CNNC).Established in part as a result of China's economic reforms and open door policies,it aims to better utilize the resources and finances of both the domestic and overseas markets to develop China's nonferrous metals industry.Two of CNIEC's most important objectives are to regulate state economic and trade activities within the nonferrous metals industry and to actively compete in the international market through the importation and exportation of nonferrous metals commodities equipment and technology.展开更多
The outbreak of COVID-19 early this year has accelerated the industry reshuffle.It is a critical period for companies to think about a long-term development strategy,optimize supply chains,and promote innovation-drive...The outbreak of COVID-19 early this year has accelerated the industry reshuffle.It is a critical period for companies to think about a long-term development strategy,optimize supply chains,and promote innovation-driven development.In the theme of "Digitalization Application and Intelligent Development in High-Efficient Die Casting Manufacturing",the event this year gathered 262 exhibitors from 9 countries and regions,among which international exhibitors account for 21%,and 11,986 trade visitors working in nonferrous,die casting and related application fields.展开更多
China Nonferrous Metals Scientific and Technical Joint-Development Group(CNJDG)consists of thirty odd research,design institutions,universities,colleges,plants,mines,enterprisesand consulting companies(see attached li...China Nonferrous Metals Scientific and Technical Joint-Development Group(CNJDG)consists of thirty odd research,design institutions,universities,colleges,plants,mines,enterprisesand consulting companies(see attached list of membership units)CNJDG has a business executive organization—Nonferrous Metals Scientific and TechnicalDevelopment Corporation(NSTDC)to suit client’s convenience.展开更多
This paper introduces the refractories used in various nonferrous metal smelting equipment in China and the existing problems, and puts forward suggestions on the material of refractories, application of new technolog...This paper introduces the refractories used in various nonferrous metal smelting equipment in China and the existing problems, and puts forward suggestions on the material of refractories, application of new technologies and production management of refractories, etc.展开更多
In April this year China National Nonferrous Metals Industries Corporation(CNNMIC)performed the Tenth Anniversary Ceremony.In the past decade the CNNMIC realized“fivedoublings”,i.e.the output,profits tax,fixed asset...In April this year China National Nonferrous Metals Industries Corporation(CNNMIC)performed the Tenth Anniversary Ceremony.In the past decade the CNNMIC realized“fivedoublings”,i.e.the output,profits tax,fixed assets,enterprise revenue and personal income展开更多
On the 3 April 1993,in the Great Hall of the People a ceremony of the tenth anniversarywas held by CNNMIC.The Vice-premier Li Lanqing and old leaders Fang Yi,Wang Heshouet al attended this ceremony.Lu Dong,Yuan Baohua...On the 3 April 1993,in the Great Hall of the People a ceremony of the tenth anniversarywas held by CNNMIC.The Vice-premier Li Lanqing and old leaders Fang Yi,Wang Heshouet al attended this ceremony.Lu Dong,Yuan Baohua,Gao Yangwen and Chen Jinhua et alministerial representatives are present also.The ambassadors and/or envoys from Romania,展开更多
Press & Publishing Journal (PPJ),March 6,1991:Upon PPJ edit-orial office's request,Institute of Scientific and Technological lnfor-mation of China (ISTTC) made a survey on the situation that how manytheses fro...Press & Publishing Journal (PPJ),March 6,1991:Upon PPJ edit-orial office's request,Institute of Scientific and Technological lnfor-mation of China (ISTTC) made a survey on the situation that how manytheses from China scientific and technological journals have been sele-cted by the 6 most important search systems (Science Literature Index,展开更多
Iron & Steel Industry China's outputs of crude steel, steel products, coke and ferrous alloys in 2012 were 716.54 million tons (up 3.1% YOY), 051.86 million tons (up 7.7% YOY), 443.23 million tons (up 5.2% YOY...Iron & Steel Industry China's outputs of crude steel, steel products, coke and ferrous alloys in 2012 were 716.54 million tons (up 3.1% YOY), 051.86 million tons (up 7.7% YOY), 443.23 million tons (up 5.2% YOY) and 31.29 million tons (up 15% YOY),展开更多
1.The Status of Major Mineral Reserves in ChinaSince 1949 162 kinds of minerals and thousands of mining area have been found out in geo-logical exploration,and 149 kinds have been proved reserves.Estimated potential c...1.The Status of Major Mineral Reserves in ChinaSince 1949 162 kinds of minerals and thousands of mining area have been found out in geo-logical exploration,and 149 kinds have been proved reserves.Estimated potential cost of 45 kindsonly of major minerals may be more than one billion RMB(?).China is the one of the great-nations of mineral resources in the world.But the distribution in respect of mineral species is not so ideal as expected.According to theirreserves the minerals can be classified as follows.展开更多
1. The production of high grade ferrite permanent magnet device (Beijing General Research Institute of Metallurgy) 2. Beijing Jinlong Science and Trade Comprehensive Building (A,B) (Beijing General Research Institute ...1. The production of high grade ferrite permanent magnet device (Beijing General Research Institute of Metallurgy) 2. Beijing Jinlong Science and Trade Comprehensive Building (A,B) (Beijing General Research Institute of Nonferrous Metals)展开更多
文摘Xianghualing ore field is located in Lingwu County, Hunan Province. It lies on the in-tersection of poly-set structures and belongs to nonferrous rare-polymetal minetalization se-ries related to the crust-origin granite in activation region. The strata of the ore field in-volves Cambrian (∈), Devonian (D) and Carboniferous (C), in which Cambrian epimeta-morphic sand stone, D<sub>2t</sub> sand stone and D<sub>2q</sub>-D(3x) dolomite are consided as the ore source-bed ofthe ore deposit. Several high-replacemental stocks, which lie above the hidden granitebatholith with NNW trending, intrude along the intersection of NW and NE trending faults.
基金funded by Taishan Scholar Special Project Funds(ts201511076)Key Research and Development Project of Shandong Province(2017CXGC1604)
文摘As China's most important gold-producing district, the Jiaodong Peninsula also contains copper, lead-zinc, molybdenum (tungsten), and other nonferrous metal ore deposits, but the space-time and genetic relationships with gold deposits remain uncertain. To investigate the temporal relationship between these nonferrous metal and gold ore deposits, We collected the samples from a number of nonferrous metallic and silver deposits and metallogenetic rock bodies in the eastern Jiaodong Peninsula for isotopic dating. The results show that the Re-Os isotopic model ages of the Lengjia molybdenum deposit in Rongcheng range from 114.5 ± 1.8 Ma to 112.6 ± 1.5 Ma, with an average age of 113.6 ± 1.6 Ma; the LA-ICP-MS ^206pb/^238U ages of 33 zircons in the sericitization porphyritic monzogranite that hosts the Tongjiazhuang silver deposit in Rongcheng range between 122 Ma and 109 Ma, with a weighted mean age of 116.04 ± 0.95 Ma; the LA-ICP-MS ^206pb/^238U ages of 31 zircons in the copper metallogenic pyroxene monzodiorite that hosts the Kuangbei copper deposit in Rongcheng range from 126 Ma to 106 Ma, with a weighted mean age of 116.6 ± 1.7 Ma; and the LA-ICP-MS ^206pb/^238U ages of 19 zircons in the pyroxene monzodiorite surrounding the Dadengge gold and multimetal deposit in Weihai range from 113 Ma to 110 Ma, with a weighted mean age of 111.7 ± 0.6 Ma. All these results indicate that the metallogenic ages of the silver and nonferrous metallic deposits in the Jiaodong Peninsula are in a limited range from 118 Ma to 111 Ma. Previous studies have demonstrated that the isotopic ages of gold deposits in the Jiaodong Peninsula range from 123 Ma to 110 Ma, while Weideshanian magmatism occurred between 126 Ma to 108 Ma. Both these ranges are grossly consistent with the metallogenic ages of silver and nonferrous metallic deposits in this study, suggesting that the large-scale mineralization occurred in the Early Cretaceous when magmatic activities were strong. This epoch may be linked to the lithosphere thinning and the thermo-upwelling extension in eastern China at that time. In addition, field investigation also shows that gold and nonferrous metallic deposits are distributed nearby the Weideshanian granite, with the nonferrous metallic deposits lying within or surrounding the granite pluton and the gold deposits outside the granite pluton. We propose the following mineralization scenario: In the Early Cretaceous, an intensive lithospheric extension induced partial melting and degassing of the metasomatized lithospheric mantle, which resulted in the formation of mantle-derived fluids enriched in metal elements. During the rapid process of magma ascent and intrusion, crust-derived fluids were activated by the magmatic thermal dome and served to further extract ore-forming materials from the crust. These fluids may have mixed with the mantle-derived fluid to form a crust-mantle mixing-type ore-forming fluid. The high-temperature conditions in the center or in contact with the granitic magmatic thermal dome would have been favorable for the formation of porphyry-type, skarn-type, and hydrothermal-vein-type ores, thus forming a series of Mo(W), Cu, and Pb-Zn deposits in the mid-eastern Jiaodong Peninsula. In contrast, the medium- to low-temperature conditions in the periphery of the magmatic thermal dome would have favored the deposition of gold (silver) ores under the appropriate physiochemical and structural conditions. The metaliogenic epoch of the molybdenum, copper, and silver deposits, and their spatio-temporal and genetic relations to the gold deposits, as demonstrated in this study, not only provide important insights to the study of regional metallogeny, our understanding of the metallogenesis of the Jiaodong type gold deposit, and the geodynamic background of the large-scale mineralization in the Jiaodong Peninsula, but also have practical value in guiding the mineral exploration.
基金supported by Project of Employees Health Status and Disease Burden Trend Study in Jinchua Nonferrous Metals Corporation,Grant JKB20120013Fogarty training grants D43TW 008323and D43TW 007864-01 from the US National Institutes of Health
文摘Environmental exposure to heavy metals has been linked to a wide range of human health hazards. We detected the levels of 15 metals in urine samples from 500 representative sub-samples in an ongoing occupational cohort study (Jinchang Cohort) to directly evaluate metal exposure levels. Fifteen metals, namely As, Ba, Be, Cd, Cs, Cr, Co, Cu, Pb, Mn, Ni, Se, TI, U, and Zn, were detected by inductively coupled plasma quadruple mass spectrometry. The results showed that median creatinine adjustment and geometric mean urinary metal levels were higher in the heavy metal-exposed group, except Se and Zn, than other reported general or occupational populations. Further studies should address the effects of heavy metals on human health.
基金financially supported by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China(No.61860206014)the Basic Science Research Center Program of National Natural Science Foundation of China(No.61988101)+2 种基金National Key Research and Development Program(No.2020YFB1713700)National Natural Science Foundation of China(Nos.61973321 and 62073342)Science and Technology Innovation Program of Hunan Province(No.2021RC4054).
文摘The nonferrous metallurgical(NFM)industry is a cornerstone industry for a nation’s economy.With the development of artificial technologies and high requirements on environment protection,product quality,and production efficiency,the importance of applying smart manufacturing technologies to comprehensively percept production states and intelligently optimize process operations is becoming widely recognized by the industry.As a brief summary of the smart and optimal manufacturing of the NFM industry,this paper first reviews the research progress on some key facets of the operational optimization of NFM processes,including production and management,blending optimization,modeling,process monitoring,optimization,and control.Then,it illustrates the perspectives of smart and optimal manufacturing of the NFM industry.Finally,it discusses the major research directions and challenges of smart and optimal manufacturing for the NFM industry.This paper will lay a foundation for the realization of smart and optimal manufacturing in nonferrous metallurgy in the future.
文摘The 13th China International Diecasting Congress & Exhibition(CHINA DIECASTING 2018) and 2018 China NonferrousAlloys & Special Casting Exhibition (CHINA NONFERROUS2018) were held concurrently July 18-20 at Shanghai NewInternational Expo Centre. The events were co-organized bythe Foundry Institution of Chinese Mechanical EngineeringSociety (FICMES), Shenyang Zhongzhu Foundry ProductivityPromotion Center Co., Ltd. (FPC) and the State Key Laboratoryof Light Alloys Casting Technologies for High-end Equipment.
基金Project(2011-0004048)supported by National Research Foundation of Korea(NRF)funded by the Ministry of Education,Science and Technology
文摘The new magnetic-assisted abrasive polishing process for non-ferrous materials was proposed in order to increase the magnetic flux density which directly influences the contact force between the workpiece and the abrasives.The permanent magnets were installed under the workpiece and their effects were verified by the experiments.The effect of polishing factors on the improvement of surface roughness was evaluated based on the Taguchi experimental method,and the optimal conditions for polishing AISI316 stainless steel were determined.The predicting model for improving surface roughness was developed and the validity of the developed model was tested.The results show that the permanent magnets are very useful in improving the surface roughness in the magnetic-assisted abrasive polishing process.
基金The project was finaneially supported by the National Natural Sciencc Foundation of China
文摘Our research and investigation proves thatthe growth rate of the productivity of thenonferrous metals industry is much lower thanthat of investment,and that the potential for in-creasing productivity iS very grear,in spite of thecompplicated influence of multiple weak joints re-strieting the increase of the productivity.To solvethese problems,following policies should
文摘The definition of a plain bearing is given.The requirements for bearing materials are pro-posed.The historical perspective and recent development of the bearing materials are intro-duced,and the performances of current bearing materials are
基金The project was financially supported by the Chima National Natural Science Foundation
文摘The productivity of China’s nonferrous metals industry during 1980-1990 has been analysed. The important factors which constrain the productivity of the nonferrous metals industry have been studied, the methods of improving the productivity of the nonferrous metals industry have been discussed.
文摘Founded in January of 1984,China National Nonferrous Metals Import and Export Corporation(CNIEC)is a combined industrial and trading subsidiary of China National Nonferrous Metals Industry Corporation(CNNC).Established in part as a result of China's economic reforms and open door policies,it aims to better utilize the resources and finances of both the domestic and overseas markets to develop China's nonferrous metals industry.Two of CNIEC's most important objectives are to regulate state economic and trade activities within the nonferrous metals industry and to actively compete in the international market through the importation and exportation of nonferrous metals commodities equipment and technology.
文摘The outbreak of COVID-19 early this year has accelerated the industry reshuffle.It is a critical period for companies to think about a long-term development strategy,optimize supply chains,and promote innovation-driven development.In the theme of "Digitalization Application and Intelligent Development in High-Efficient Die Casting Manufacturing",the event this year gathered 262 exhibitors from 9 countries and regions,among which international exhibitors account for 21%,and 11,986 trade visitors working in nonferrous,die casting and related application fields.
文摘China Nonferrous Metals Scientific and Technical Joint-Development Group(CNJDG)consists of thirty odd research,design institutions,universities,colleges,plants,mines,enterprisesand consulting companies(see attached list of membership units)CNJDG has a business executive organization—Nonferrous Metals Scientific and TechnicalDevelopment Corporation(NSTDC)to suit client’s convenience.
文摘This paper introduces the refractories used in various nonferrous metal smelting equipment in China and the existing problems, and puts forward suggestions on the material of refractories, application of new technologies and production management of refractories, etc.
文摘In April this year China National Nonferrous Metals Industries Corporation(CNNMIC)performed the Tenth Anniversary Ceremony.In the past decade the CNNMIC realized“fivedoublings”,i.e.the output,profits tax,fixed assets,enterprise revenue and personal income
文摘On the 3 April 1993,in the Great Hall of the People a ceremony of the tenth anniversarywas held by CNNMIC.The Vice-premier Li Lanqing and old leaders Fang Yi,Wang Heshouet al attended this ceremony.Lu Dong,Yuan Baohua,Gao Yangwen and Chen Jinhua et alministerial representatives are present also.The ambassadors and/or envoys from Romania,
文摘Press & Publishing Journal (PPJ),March 6,1991:Upon PPJ edit-orial office's request,Institute of Scientific and Technological lnfor-mation of China (ISTTC) made a survey on the situation that how manytheses from China scientific and technological journals have been sele-cted by the 6 most important search systems (Science Literature Index,
文摘Iron & Steel Industry China's outputs of crude steel, steel products, coke and ferrous alloys in 2012 were 716.54 million tons (up 3.1% YOY), 051.86 million tons (up 7.7% YOY), 443.23 million tons (up 5.2% YOY) and 31.29 million tons (up 15% YOY),
文摘1.The Status of Major Mineral Reserves in ChinaSince 1949 162 kinds of minerals and thousands of mining area have been found out in geo-logical exploration,and 149 kinds have been proved reserves.Estimated potential cost of 45 kindsonly of major minerals may be more than one billion RMB(?).China is the one of the great-nations of mineral resources in the world.But the distribution in respect of mineral species is not so ideal as expected.According to theirreserves the minerals can be classified as follows.
文摘1. The production of high grade ferrite permanent magnet device (Beijing General Research Institute of Metallurgy) 2. Beijing Jinlong Science and Trade Comprehensive Building (A,B) (Beijing General Research Institute of Nonferrous Metals)