锡冶炼过程生命周期评价

依据生命周期评价的技术框架和原则,对国内某企业锡生产焙烧、还原熔炼、精炼、炉渣熔炼及烟化处理等过程进行生命周期评价研究。结果表明:不可再生资源消耗指数(ADP)5.85×10-8,温室效应指数(GWP)4.35×10~(-9),酸化效应指数(AP)4.66×10~(-10),光化学烟雾形成指数(POCP)2.14×10~(-10)。锡冶炼系统的各种环境影响严重性排序为ADPGWPAPPOCP。发现锡冶炼系统中对ADP的影响几乎全部源于焙烧过程中锡精矿的使用;锡冶炼系统的能耗主要集中在电力的消耗,所占比重为65%,其次是粉煤,占比重28%;锡冶炼系统气体污染物排放所造成的环境影响中,温室效应的影响最为严重。     

多源有色冶炼固废中稀散金属可控富集过程的生命周期评价——以富集碲为例

为研究从多种有色金属冶炼过程产生的浸出渣、黑铜泥和铜砷饼等有色冶炼固废中稀散金属Te可控富集过程资源消耗及环境影响情况,运用生命周期评价（LCA）技术评估了该过程对环境的负荷。在eFootprint上建立相应的LCA模型,并对研究范围、清单数据、环境影响结果等进行分析。结果表明,该工艺生产过程对初级能源消耗、水资源消耗、全球变暖潜值、酸化及生态毒性的影响较大。从1.00 t多源有色冶炼固废中富集1.46 kg碲粉,要消耗8 089.53 MJ的初级能源和11 645.43 kg水资源,还排放803.45 kg造成温室效应的气体,产生5.10 kg酸性物质,并且生态毒性指标值为2.98。结合工艺特点,通过对LCA结果和清单数据敏感度分析,为整个生产过程提供了绿色改进方案。      

镍丸的应用

用羰基法可生产直径8-10mm的镍丸。其化学成分一般为：Ni：99．5％；C：0．01％；Fe：0．01％；Cr：0．001％；S：0．001％；Co：0．0005％；Pb：0．0001％；As：0．0001％。由于镍丸的纯度高，不含有有害杂质（磷、铅、锌等），也几乎不含钴元素，因此是核工业中的重要材料。镍丸具有快速熔化的特点，是炼制不锈钢、高温合金及其它高级合金钢的优秀原料，高品质的镍丸也是制备高质量硫酸镍的原料。     

不锈钢轧制渣中镍的回收

本文报导一种不锈钢轧制中镍的回收方法。首先在室温下用２：１Ｈ２ＳＯ４和１：１ＨＣｌ混合酸浸取，镍的浸出率为９５．５０％；然后，用正交实验方法研究了从浸出液中沉淀镍的最好条件为：Ｎａ２Ｓ过量５０％，ｐＨ值为３．１，沉淀时间为６ｈ，沉淀温度３５℃。分离出的ＮｉＳ可返回冶炼过程或制备镍的其它化合物。     

“2008（太原）首届中西部十二省（市）有色金属发展论坛”将于9月召开

中国是世界有色金属第一生产及消费大国，中西部地区是我国有色金属重要生产地区。2007年，中西部地区十种有色金属产量占到全国产量的83％，其中氧化铝、电解铝、电解铜产量分别占到全国的67．3％、84．4％、67．2％；铅、锌、镁产量分别占全国的90．5％、83.1％、99．8％；镍、锡、锑产量分别占到全国的100％、96．9％、98．66％；其他金属产量如钨、钼也占有重要比例，但加工材占全国比例相对较低，其中铜、铝材分别占到全国的28．05％和36．7％。     

从废银料中提取贵金属

福建省闽西地质大队实验室，利用甲醛生产厂的废银原料——废银液料、氯化银料和银泥料，采用全水冶流程或水冶一冶炼流程，获得含银99．2％以上的海绵银或金属银，生产制取分析纯硝酸银，银总回收率为98．73％；利用双氧水厂的废钯触煤，采用硫酸浸出工艺，获得含钯99．1％的金属钯，钯回收率为99．15％。经过专家评审认为，从废银料中制取     

微波脱硫等离子体冶炼高冰镍

一种等离子体冶金直接获取高冰镍的方法，铜、镍氧化矿通过预处理以及脱硫工序得到焙砂，焙砂再经过冶炼得到高冰镍。其特征在于：冶炼过程在一等离子冶金炉内进行，其主要由等离子体电源、喷枪、反应塔、熔池、烟道等部分组成；冶炼过程及技术条件是：等离子冶金炉经过烤炉至1500℃引弧，将含硫4％～8％，粒度-180目的焙砂及石英石打入温度5000—6000℃的反应塔内等离子中温区，物料瞬间即熔并完成化学反应后进入熔池澄清分离，熔池温度1800～2000℃；所处理的物料含镍Nj3％～10％、Cu2％-8％、S20％-27％。     

提高金属铬品质方法初探

介绍了含Cr99．4％以上金属铬现状及生产所遇到的问题。通过改变部分工艺流程和设备耐材，并在冶炼过程中控制合适的原料粒度，可以使冶炼回收率及系统品级命中率显著提高。     

D2EHPA萃取分离锌和镍试验研究

采用D2EHPA溶剂对含锌镍酸性溶液进行萃取分离锌、镍试验研究,在最佳萃取、反萃分离条件下,锌的萃取、反萃率分别为99．34％、99．79％,镍的萃取、反萃率分别为99．16％、99．58％,锌镍分离系数达25000以上,得到的含锌、含镍反萃液分别符合电解锌、电解镍的技术要求。     

氰化金泥控电氯化精炼工艺的研究

控电氯化金冶炼新工艺是在有色金属湿法冶金的基础上，通过控制电位，实现贵贱金属的分离。该工艺不仅能生产出高纯度的金、银，而且金、银回收率高，金的冶炼直接回收率大于99．5％，金、银的综合回收率在99％以上，同时该工艺缩短了冶炼周期，降低了生产成本。     

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.