五龙金矿含氰尾矿浆充填前的处理研究

通过对五龙金矿含氰尾矿浆的直接处理发现,当尾矿浆中氰化物质量浓度在250~300mg/L时,要使尾矿浆中氰化物质量浓度达到最终充填要求的1mg/L,其最佳处理条件:次氯酸钙加入量为8.50kg/t尾矿浆,搅拌时间为5min,搅拌速度为300r/min,pH值为9;搅拌后,静置25min,测定氰化物质量浓度。经计算表明,直接对尾矿浆进行处理的成本较高,所以研究了在处理前加入洗涤步骤。试验考察了不同洗涤用水量和加药量,并结合经济效益分析得出:最终洗涤水量为250kg/t尾矿浆,加药量为0.29kg/t尾矿浆。这样,使含氰尾矿浆处理成本从直接处理的45.9元/t尾矿浆降至2.19元/t尾矿浆。     

离子交换法从石煤直接酸浸液中提取钒的工艺研究

研究了用离子交换法从石煤直接酸浸液中提取钒,考察了树脂类型、吸附接触时间、pH等因素对钒吸附率的影响。试验结果表明：采用离子交换法处理石煤酸浸液,能很好地去除溶液中的大部分杂质,使钒得到富集。在溶液pH-2．1、吸附接触时间60min条件下,树脂对V2O5的最大吸附工作容量为270mg／mL湿树脂,钒吸附率在99％以上。以100g／LNaOH溶液为解吸剂进行解吸,解吸液中Vzos质量浓度达100g／L以上。解吸液经沉淀、洗涤、干燥、煅烧,最后得到v20。质量分数在99％以上的钒产品。     

201×7强碱性阴离子交换树脂对氰化物的吸附性能及吸附机理

通过试验选择了201×7强碱性阴离子交换树脂吸附氰化物,确定了该树脂对氰化物的静态饱和吸附量为25．39mg／mL湿树脂,动态饱和吸附量为27．43mg／mL湿树脂。在研究解吸的过程中,选择中性NaCl溶液作为解吸剂,取得了良好的解吸效果。通过动态试验,研究了氰化物质量浓度、流速等因素对树脂吸附性能的影响,以及NaCl溶液流速对淋洗效果的影响。研究探讨了该树脂吸附氰化物的机理,结果表明,氰化物在201×7树脂上的吸附机理主要是CN^-与树脂的季胺基团形成氢键吸附和范德华引力吸附。201×7树脂对氰化物的吸附性能较好,在处理、回收提金废水氰化物中,具有工业应用前景。     

氰化物的破坏与回收

氰化物广泛用于从矿石中浸出贵金属，在很多情况下尾矿浆中含有较高浓度的氰化物。如果为了降低氰化物浓度而需要处理尾矿浆时，那么浸出过程的总成本因处理氰化物将会提高。本文分析了一些常规的氰化物破坏和回收工艺所需的基建费用和生产费用等，并详细介绍氰化物吸收法的某些应用。处理费以每年吨矿来表示，比较是按浸出过程处理氰化物的全部费用计算，这笔费用包括采购费和处理费。对以下两个系统的基建费和生产费进行比较：尾矿浆：处理量：2500St／d（ISt＝0．907t）矿浆含固量：35％比重：1．27WAD氰化物：250X10－‘清液：处理量…     

低密度树脂的制备及其对矿浆中铀的吸附性能研究

研究了以氯甲基苯乙烯作单体、以高强度低密度真空玻璃微球(HMG)为填料、采用悬浮聚合法制备低密度树脂并用于从矿浆中吸附铀。结果表明：以十二烷基硫酸钠为表面活性剂、以膨润土为触变剂，可降低连续相水表面张力，所制备树脂密度低，约0.87 g/mL;在碱性矿浆200 mL、铀质量浓度500 mg/L、低密度树脂用量1 g、CO₃^2-质量浓度17.5 g/L、HCO^-₃质量浓度6.3 g/L、pH=10、室温下静态吸附铀16 h,连续吸附3次后达到平衡，饱和吸附量为51.8 mg/g;吸附过程符合准二级动力学模型和Langmuir等温吸附模型；经10次连续逆流吸附，树脂吸附量保持在48.2 mg/g左右，性能稳定，表面无破损，树脂漂浮率接近100%。     

用Amberlyst A29和Amberlyst A21树脂从氯化物溶液中吸附钯(Ⅱ)

Z．Hubicki和A．Wolowicz研究了两种离子交换树脂——强碱性AmberlystA29树脂和弱碱性AmberlystA21树脂在静态和动态条件下从HCI—NaCl溶液中吸附钯（Ⅱ），溶液酸度为0．1～2．0mmol／L，NaCl浓度分别为1．0和2．0mmol／L。用钯（Ⅱ）的穿透曲线计算离子交换容量、质量和树脂分配系数，用Legergren方程研究动力学，用二阶反应模型和颗粒内扩散模型计算动力学参数。试验观察到，     

用螯合树脂Monophos去除硫酸钴溶液中痕量铁试验研究

研究了采用螯合树脂Monophos以离子交换法从钴质量浓度60g/L、铁质量浓度约2.0mg/L的CoSO4溶液中去除铁,通过静态吸附试验,考察料液pH、树脂与料液体积比、温度、接触时间对痕量铁去除率的影响。结果表明:螯合树脂Monophos对铁有很强的吸附能力,在pH=3、温度30~60℃、树脂与料液体积比(1∶5)~(1∶8)、吸附时间不低于90min条件下,CoSO4溶液中铁去除率达74%,溶液中铁离子质量浓度从2.0mg/L左右降到0.4mg/L。     

用强酸性阳离子交换树脂从不锈钢酸洗废水中富集铬

研究了用强酸性阳离子交换树脂(001×7)吸附不锈钢酸洗废水中的铬,考察了树脂的饱和吸附容量、吸附时间对树脂吸附铬的影响,分析了等温吸附平衡及负载树脂的解吸再生。结果表明:298 K温度下,001×7树脂对废水中Cr3+的饱和吸附容量为60.34 mg/g;吸附90 min可达离子交换平衡;废水中铬质量浓度为700mg/L时,树脂的平衡吸附量为90 mg/g;根据吸附动力学,初步判定吸附过程为液膜控制;用质量浓度为9g/L的硫酸钠溶液可以从负载树脂上解吸铬,铬解吸率达99%以上,解吸后的树脂可重复使用。     

离子交换法回收电解金属锰废水中锰的研究

为了验证离子交换树脂在电解金属锰废水行业中的应用效果,通过静态吸附实验、中试动态实验的方法,研究了不同类型离子交换树脂对锰离子的吸附性能及回收特性。结果表明,离子交换树脂对锰离子有一定的交换吸附能力,且同类树脂对各二价金属离子选择性无明显区别,其中各树脂对二价金属离子的吸附能力：D113〈732〈D851。经过一次再生后,离子交换树脂交换吸附能力下降,之后进行多次再生后,其交换吸附能力基本趋于稳定,钙离子对离子交换树脂的再生一吸附有较大负面影响。洗脱液中锰离子浓度最高可达20000mg／L以上。     

201×7强碱性阴离子交换树脂对氰化物的吸附性能及吸附机理

通过试验选择了201×7强碱性阴离子交换树脂吸附氰化物,确定了该树脂对氰化物的静态饱和吸附量为25.39mg/mL湿树脂,动态饱和吸附量为27.43mg/mL湿树脂。在研究解吸的过程中,选择中性NaCl溶液作为解吸剂,取得了良好的解吸效果。通过动态试验,研究了氰化物质量浓度、流速等因素对树脂吸附性能的影响,以及NaCl溶液流速对淋洗效果的影响。研究探讨了该树脂吸附氰化物的机理,结果表明,氰化物在201×7树脂上的吸附机理主要是CN-与树脂的季胺基团形成氢键吸附和范德华引力吸附。201×7树脂对氰化物的吸附性能较好,在处理、回收提金废水氰化物中,具有工业应用前景。     

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.