铜渣中上清液除氯试验及产业化应用研究

在铜渣除氯原理基础上,通过铜渣除氯的探索性试验,确定对中上清进行铜渣除氯,并进行了中上清铜渣除氯半工业试验,确定了铜渣除氯的条件为:加入氧化剂和废液浸出铜渣1 h,除氯30 min,除氯率达70%;在将铜渣除氯应用于工业生产后,除氯率达60%,效果好。     

高氯锌浸出液铜渣脱氯试验及应用

锌精矿在浸出过程中氯离子在溶液中不断富集,使氯离子在系统溶液中的含量达到780 mg/L。如何高效、环保、低成本的脱氯成为湿法冶炼共同面对的问题,本文研究采用铜渣作为脱氯剂应用于湿法炼锌溶液脱氯。小试后溶液脱氯率可达76%。后期采用铜渣脱氯的实验参数运用于工业生产中,铜渣脱氯率可到75%以上,铜渣作为一种锌湿法冶炼副产品,铜渣脱氯技术得到很好的利用,铜渣除氯对氯离子的脱除率较高,对环境无污染,脱氯成本低,湿法冶炼系统溶液不会代入杂质离子,安全可靠。但对于脱氯铜渣的回收及循环利用过程中产生的碱洗水的处理成本较高。      

从铜镉渣中回收锌、镉、铜试验研究

通过小型试验和工业试验,研究了一段浸出法从铜镉渣中浸出锌、镉、铜。试验结果表明:浸出体系中添加强氧化剂B可明显提高氧化速率和锌、镉浸出率,只需一段浸出,锌、镉浸出率均大于91%,且浸出液中杂质含量低,不需进一步除杂;铜不被浸出而是以海绵铜形式留在渣中,渣中铜质量分数为43%~46%,此渣可返回铜渣除氯系统循环利用。     

湿法炼锌废电解液除氯工艺研究与应用

研究了利用湿法炼锌自产的铜渣直接从废电解液中除氯的工艺,并得出最佳工艺条件:反应温度为常温、铜渣加入量6kg/m3、反应时间10min,除氯后液氯含量可控制在100mg/L以内。     

自动电位滴定法间接测定除氯铜渣中氯

除氯铜渣是生产硫酸铜或再生后用于除氯的一种重要原料,为确保其使用质量,需要对其中氯含量进行测定。该渣中氯主要以难溶CuCl形态存在,为了将该渣中的Cl^-全部溶出且在溶样过程中确保Cl^-不挥发,提出了银量法处理待测试样、自动电位滴定法间接测定除氯铜渣中氯的方法。测定时先将定量过量的AgNO³标准溶液加入到样品中,然后加入硝酸（1+3）溶解,溶液中的Cl^-及时与Ag⁺形成AgCl胶体,加热煮沸使AgCl胶体迅速凝聚并沉淀完全,冷却定容,干过滤。取定量滤液,加入定量过量Cl^-标准溶液,煮沸使之沉淀完全,采用自动电位滴定法测定滤液中剩余的Cl^-量,通过计算间接得到除氯铜渣中的氯含量。试液中F^-、SO₄^2-、Na⁺、Cu、Zn²⁺、Cd²⁺、Mg²⁺、Fe³⁺、As等杂质离子对测定没有影响。采用实验方法测定4种除氯铜渣样品中氯的含量,测定结果与火焰原子吸收光谱间接测定法一致,相对标准偏差(RSD,n=5)在0.75%～2.6%之间,回收率在99％～101％范围内。     

氧压酸浸含铜副产物除氯试验研究

本文针对本公司锌系统含氯高的沉铟后液进行铜渣除氯试验,利用氧压酸漫所产的含铜副产物作除氯剂。考察铜氯质量比、反应时间、初始酸度、反应温度等因素对除氯效果的影响。试验结果表明:采用氧压酸浸含铜副产物采除氯的工艺是可行的;在最佳条件:铜氯质量比为3、反应时阃为1 h、初始酸度pH为1.0、反应温度为常温,除氯率为90.65%,处理后,溶液中Cl~-降至88 mg/L,效果比传统的铜渣除氯方法要好。     

贫化铜渣熔融还原提铁试验研究

研究以贫化铜渣为对象,首先对贫化铜渣熔融还原进行理论分析,并进行试验考察炉渣碱度、碳氧比、冶炼时间和冶炼温度四个因素对铜渣中铁元素回收率的影响。试验结果表明,(1)贫化铜渣熔融还原提铁合理的试验参数为:铜渣碱度0.3~0.5,碳氧比为1.15~12,冶炼温度为1 500~1 550℃,冶炼时间为40~45 min;(2)在合理试验参数下,铁元素回收率在90%以上,铜元素全部进入金属相;(3)试验获得了铁含量88%~90%,铜含量4.2%~4.6%的含铜铁,可望用于耐候钢等舍铜钢种的冶炼。尾渣中SiO2含量高达50%以上,可使用制备矿物棉等高附加值产品,从而实现铜渣资源的全部高附加值利用。     

湿法炼锌过程中铜渣除氯试验研究

本文研究了新制活性铜粉与长期存放后的铜渣用于湿法炼锌系统中氯的脱除条件。结果表明:采用硫酸铜和锌粉置换生成新制活性铜粉进行铜渣除氯,氯的脱除率达77%～80%,且随温度变化不大;采用铜镉渣洗液提供铜离子,锌粉置换铜离子生成活性铜粉进行铜渣除氯时,氯的脱除率随n(Cu)_T/n(Cl~-)比例的增大而升高,当n(Cu)_T/n(Cl~-)从4∶1增加到12∶1时,氯的脱除率从72. 66%升高至87. 98%;用久置的铜镉渣制备的铜渣,因铜已经失去和铜离子、氯离子反应生成氯化亚铜的活性,通过调节温度、pH、n(Cu)_T/n(Cl~-)比例等均不能有效地脱除溶液中的氯离子。     

湿法炼锌中氯的危害及控制

文章论述了湿法炼锌中氯对系统的影响,提出了利用铜渣净化除氯的方法,分析了铜渣净化除氯中各因素对除氯效果的影响.     

铜渣-生物质复合球团微波还原回收铁试验研究

铜渣中铁含量在30%~45%,高于工业可采铁矿石品位,但铜渣中的铁主要以橄榄石形式赋存,提取回收难度大。以铜渣为原料,生物质碳为还原剂,采用微波还原—磁选工艺回收铜渣中铁资源。研究表明：铜渣生物质复合球团的最佳还原工艺为：还原温度1 473 K、还原时间90 min、CaO添加量为铜渣质量的15%,磁选后铁精矿中铁的品位可达85.9%,铁回收率为89.1%。     

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.