炼铜烟灰批式滴加酸浸锌与两步氧化除铁工艺

采用炼铜烟灰制取硫酸锌,研究了批商加酸浸取锌和两段降铁工艺。实验结果表明：用批式滴加法浸取,锌浸取率〉９８％、铜浸出率可控制在０．０２％以下,其工艺条件为：液固质量比３：１,温度８０～９０℃,酸浸液中硫酸加入量３９ｇ／Ｌ,滴酸时间１．５ｈ,浸取时间２ｈ,采用先通氧（或鼓空气）氧化,再加过氧化氢深度氧化除铁工艺,溶液最终铁含量〈０．０１ｇ／Ｌ,制得的硫酸锌可用于电解。     

从高炉瓦斯灰和炼钢炉的烟尘中回收锌

本文介绍了炼铁和炼钢过程所产生的烟尘中锌的回收工艺研究,其浸取率约为58％,烟尘经过高压浸取、蒸馏、置换、焙烧和水洗可获得高纯度氧化锌。     

废锰催化剂中锰,铁,镍,钴的硫酸直接浸出

本文报道了对苯二酚生产过程中废锰催化剂内所含主要元素锰、钴、镍、铁的硫酸浸取行为。认为锰的浸取反应原理由硫酸与二氧化锰的氧化还原反应,及铁、氧化亚铁与硫酸反应所生成的硫酸亚铁与二氧化锰的氧化还原反应组成。实验中选择了不同的搅拌转速、液固比、浸取剂硫酸的浓度、温度等操作条件,考察了锰、铁、镍、钴的浸取情况,其中温度的影响最显著。在浸取温度为80℃,浸取剂硫酸浓度为2.8mol/L,液固比为6.6:1,搅拌转速为250rpm,浸取反应时间为3.5h的条件下,锰的浸出率几乎达到100％,铁的浸出率为75％。镍,钴在所有的实验条件下,浸出率均接近100％。     

一种新型还原剂与海洋锰结核还原浸出有价金属的试验

采用一种还原剂BR与锰结核发生反应，再用硫酸浸取有价金属离子。探讨了锰结核与还原剂之配料比。浸出液pH值，浸取温度，浸取时间等因素对锰结核中有价金属浸出率的影响。结果表明锰结核与还原剂配料比为4：1，浸出液pH约2．0，浸取温度达到95℃以上。浸出时间90min，锰、铜、钴、镍的浸出率分别达到98．20％、99．88％、99．91％、99．95％、铁的浸出率为18．23％。     

解胶剂在难选锌矿中的应用研究

在湿法提取黄石市锶发矿业有限责任公司的锌矿中，针对其含泥量高、氧化程度高，主要金属矿物锌矿大部分以隐晶状态存于矿石中，部分锌矿表面为铁质（针铁矿等）渲染；使得酸浸困难，浸取率低的状况。采用解胶剂解除其包裹，增强酸向锌表面的扩散。研究表明，采用盐酸在80℃恒温水浴加上用适量解胶剂的浸取，锌的氧化浸出率在80％以上。     

回收BOP炉尘中铁锌新工艺

BOP（碱性氧化法）炉尘中锌含量高，可达到7．1％，经低温（＜700℃）及还原作用（以H2－Ar为还原气），可得到纯铁和纯锌。纯铁和纯锌可由氨浸取液进行分离。从浸取残渣中可获得含锌0．44％的纯铁。中低含锌量的BOP炉尘（Zn含量分别为2．7％和4．1％）也可以被回收，其固体残渣的锌含量为0．3％，本研究所使用的BOP炉尘，其Zn含量在0．4－7％之间，回收后的炉尘可用于炼铁和炼钢，纯锌液可用于制锌业，并提出BOP炉尘回收新工艺。     

碘-乙醇非水体系分离—重铬酸钾滴定法测定炉渣中金属铁与氧化亚铁

对炉渣中的金属铁与氧化亚铁的测定进行了研究。通过考察与金属铁反应而不与氧化亚铁反应的5种弱酸盐溶液(醋酸铅溶液、醋酸铜溶液、三氯化铁-醋酸钠-醋酸溶液、碘-碘化钾溶液、三氯化铁溶液)和非水溶液(碘-乙醇溶液)对金属铁的浸取效果,选取了碘-乙醇溶液作为炉渣中金属铁的浸取剂。实验结果表明,0.200 0 g炉渣样品用50 mL碘-乙醇溶液浸取40min, 采用重铬酸钾滴定法分别测定浸取液中铁量和浸取后残渣中的亚铁量,得到炉渣中金属铁和氧化亚铁量, 金属铁的浸取率在97 %以上,而氧化亚铁不被浸出。与经典的三氯化铁浸取剂相比,本浸取剂对金属铁的浸取效果好,金属铁与氧化亚铁分离完全,避免了用三氯化铁溶液作浸取剂时亚铁与金属铁的酸溶干扰。以碘-乙醇溶液浸取钢渣和脱磷渣后采用重铬酸钾滴定法测定,金属铁的测定结果的相对标准偏差(RSD)分别为4.2%和4.6 %,氧化亚铁测定结果的相对标准偏差(RSD)分别为0.72%和0.62%。     

有机酸选择性浸出钢铁厂转炉粉尘中的锌

采用有机酸浸取工艺对比了草酸、柠檬酸、乙酸、丙酸、丁酸和戊酸6种有机酸对某转炉粉尘中铁和锌的浸出效果,并进一步对丁酸浓度和液固化学计量比进行了优化探索。结果表明:6种酸对锌和铁的浸出行为不同,草酸极易在粉尘表面生成沉淀物阻碍浸出,柠檬酸具有络合性有利于浸出但锌的浸出选择性差,其余4种烷基酸随碳链增加对锌的浸出选择性增大,到丁酸效果较好。对丁酸浸出条件进行初步优化后,锌和铁的浸出率分别为51.2%和0.5%,浸出液中锌与铁的质量比为12.6,并设计了丁酸浸出工艺流程,可为未来处理钢铁含锌冶金粉尘提供参考依据。丁酸的高效选择性具有良好的应用前景,对我国钢铁企业实施可持续发展战略具有十分重要的现实意义。      

从锌冶炼烟尘中回收银及有价金属的工艺研究

系统地研究了从台炼烟尘中回收银、锌、铅的新工艺、考察了稀硫酸浸取锌、氯盐浸取银、铅的最佳工艺参数。该工艺能有效地回收烟尘中的银、锌、铅,并具有工艺简单,综合回收率高,无污染等特点,锌、铅、银的回收率分别大于９１％,９９％和９８％。     

多金属复杂硫化矿的细菌浸出

研究了铅锑锌铁多金属复杂硫化矿原矿的细菌摇瓶和渗滤浸出，摇瓶试验结果表明，10d内锌的浸出率可达到98％以上，渗滤柱浸出60d后锌的浸出率仅为7．30％。利用X-射线衍射和电镜扫描分析了浸出作用的机理。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

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.