异极矿的氨法浸出研究

以氨-硫酸铵体系浸出某异极矿型硅酸锌矿,考察了浸出剂浓度、NH3和（NH4）2SO4摩尔浓度比、液固比、时间、温度和搅拌速率等因素对异极矿中锌浸出率的影响,并分析了相应的浸出机理,得到的最佳实验条件为：总氨浓度8．5mol／L,NH3和（NH4）2SO4摩尔浓度比2：1,液固比20,反应温度45℃,搅拌速率250r／min,浸出时间1h。在最佳条件下。锌浸出率达93．84％。     

铜冶炼烟灰碱浸渣氨浸工艺

以铜冶炼烟灰碱浸渣为原料,研究氨-硫酸铵体系的 pH 值、总氨浓度、氨铵摩尔比、液固质量比、反应温度、反应时间等因素对铜冶炼烟灰碱浸渣中铜锌浸出的影响规律.结果表明,最佳工艺条件为:总氨浓度为 5 mol/L、pH 值为 10、氨铵摩尔比为 2:1、液固质量比为 5:1,浸出温度为 70 ℃,浸出时间为 60 min.此条件下铜和锌浸出率分别为 90.6 %和 92.4 %.      

用加压氨浸法从低品位铅冰铜中浸出铜锌试验研究

研究了采用NH₃·H₂O-(NH₄)₂CO₃体系从低品位铅冰铜中加压氨浸分离铜锌，考察了氨水浓度、氧气压力、搅拌速度、碳酸铵浓度、温度、液固体积质量比和浸出时间对金属浸出率的影响。结果表明：在氨水浓度3.5 mol/L、氧气压力0.8 MPa、搅拌速度800 r/min、碳酸铵浓度1.5 mol/L、温度100℃、液固体积质量比6/1条件下浸出4 h,铜、锌浸出率分别为81.99%和70.20%,而铁、铅浸出率仅4.11%和1.78%,铜、锌得到选择性浸出。     

高碱性氧化锌矿氨性浸出研究

以NH3—NH4C1体系浸出某高碱性氧化锌矿,考察了氨浓度、液固比、时间和温度等因素对锌浸出率的影响,并分析了相应的浸出过程,得到的最佳实验条件为:NH3:NH4Cl摩尔浓度比为1∶1、氨浓度5 mol/L、液固比为3∶1、浸出时间为2 h、浸出温度40℃,此时锌浸出率为89.3%。     

从瓦斯灰中碱浸锌及其动力学研究

研究了用氢氧化钠从瓦斯灰中提取锌,考察了氢氧化钠浓度、固液质量体积比、浸出温度、反应时间及搅拌速度对锌浸出率的影响。试验结果表明:在初始氢氧化钠浓度为6mol/L、固液质量体积比1∶10、浸出温度80℃、反应时间60min、搅拌速度600r/min条件下,锌浸出率为63%。浸出反应动力学分析结果表明,锌浸出过程受扩散与化学反应混合控制。     

NH_3-NH_4~+-CO_3~(2-)体系浸出电镀污泥中铜、镍试验研究

研究了用NH3-NH+4-CO2-3体系从电镀污泥中浸出铜、镍,考察了总氨浓度、氨铵物质的量比、液固体积质量比、浸出温度、浸出时间对铜、镍浸出率的影响。结果表明:在总氨浓度为9 mol/L、氨铵物质的量比为1∶2、液固体积质量比为4∶1、浸出温度为70℃、浸出时间为4h的最优条件下,铜浸出率达95.02%,镍浸出率达88.4%。     

氨法浸出电镀废渣中镍铜的工艺

实验采用NH3-NH4+-H2O体系浸出电镀废渣中镍和铜,通过正交试验研究了总氨浓度、氨铵比、液固比、温度、浸出时间对浸出率的影响.结果表明,在总氨浓度为6 mol/L、氨铵比为1∶1、液固比为8∶1、浸出温度80℃、浸出时间3h的最优条件下,镍的浸出率可达到82％,铜的浸出率可达到95％.     

从铅锌废渣中氨浸锌试验研究

研究了采用氨浸法从铅锌废渣中回收锌,以及用溶剂蒸发法制备碱式碳酸锌,考察了浸出温度、浸出时间、总氨浓度和液固体积质量比对锌浸出率的影响。结果表明:影响锌浸出率的因素排序为液固体积质量比浸出时间浸出温度总氨浓度;在浸出温度30℃、浸出时间2 h、总氨浓度4 mol/L、液固体积质量比7 mL/g适宜条件下,锌浸出率为81.99%;所制备的碱式碳酸锌为无定形状态,化学式为Zn_5(CO_3)_2(OH)_6·2H_2O。     

在碱性介质中浸出和沉淀电弧炉灰尘中的重金属

Gokhan Orhan在实验室研究了用碱液浸出并结合湿法和有利于环境的冶金方法处理电弧炉烟尘以回收其中的锌和铅。最佳条件为：温度95℃，液固质量比7：1，氢氧化钠浓度10mol／L，浸出时间2h。在此条件下，锌回收率为85％，铅回收率为90％。在50℃下进一步净化浸出液以回收金属杂质（Pb，Cu，Cd等）和使其适合于碱性电解锌。沉淀过程受化学控制，活化能为26．7kJ／mol。     

氢氧化钠法分离回收镍钴渣中锌钴试验研究

研究了用氢氧化钠从湿法炼锌镍钴渣中回收锌、钴。基于单因素试验,揭示了锌、钴浸出行为,考察了反应时间、温度、氢氧化钠质量浓度和液固质量比对锌、钴浸出率的影响。结果表明：用氢氧化钠浸出,在温度70℃、液固质量比10/1条件下,用质量浓度398 g/L的氢氧化钠溶液浸出镍钴渣0.5 h,锌、钴浸出率分别为93.5%和5.11%;浸出渣中锌、钴质量分数分别为4.80%和32.70%,锌、钴得到有效分离。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.