从铜转炉烟灰中浸出铜、锌试验研究

研究了从铜火法冶炼中的铜转炉烟灰中用硫酸浸出有价金属。通过单因素试验,确定了最佳浸出工艺条件。试验结果表明:反应时间和液固体积质量比对铜、锌浸出率影响较小,而硫酸浓度、反应温度等因素则有较大影响;在搅拌速度300 r/min、反应温度70℃、反应时间1.5 h、液固体积质量比7∶1、硫酸浓度1.80mol/L条件下,锌、铜浸出率均大于90%。     

铜闪速炉烟灰硫酸化焙烧后焙砂浸出试验研究

考察了搅拌速度、浸出时间、初始硫酸浓度、浸出温度、液固质量比等条件对稀硫酸浸出铜闪速炉烟灰硫酸化焙烧所得焙砂的影响。结果表明,在下述最佳浸出条件下:搅拌速度400r/min、浸出时间70min、初始硫酸浓度0.8mol/L、浸出温度60℃、液固质量比5∶1,铜、铁、砷、铟等有价金属浸出率均在90%以上。     

用硫酸从某难处理氧化铜矿石中浸出铜试验研究

研究了从某难处理氧化铜矿石中酸浸铜,考察了硫酸质量浓度、液固体积质量比、搅拌速度、矿石粒度、浸出时间、温度对铜浸出率的影响。结果表明:在硫酸质量浓度165g/L、液固体积质量比3∶1、搅拌速度300r/min、矿石粒度-74μm占50%、浸出时间100min、温度40℃条件下,铜浸出率为93%,试验效果较好。     

湿法富集铅冰铜中的贵金属

针对铅冰铜的物相组成,提出了加压酸浸除铜—碳化转化铅—硝酸浸出铅的全湿法富集贵金属工艺,考察了浸出压力、温度、时间、硫酸浓度、液固体积质量比对铜浸出率的影响以及铜浸出渣碳化转化—硝酸浸出铅的条件。结果表明:在氧气压力1.2MPa、浸出温度120℃、浸出时间3h、硫酸质量分数20%、液固体积质量比4∶1、搅拌转速250r/min的最佳条件下,铜浸出率为97.21%;在碳化温度50℃、碳酸氢铵用量为理论量的1.2倍、碳化时间1.5h、液固体积质量比4∶1、硝酸用量为理论量的1.1倍的最佳条件下,铅转化率在96%以上,铅浸出率为99.8%;铅冰铜中的贵金属得到富集,富集比达到3.5倍。该工艺可用于从铅冰铜中富集贵金属。     

用硫酸-二氧化硫体系从锌浸出渣中还原浸出有价金属

研究了用硫酸-二氧化硫体系从锌浸出渣中还原浸出锌、铁、铜、铟等有价金属,考察了初始硫酸质量浓度、反应温度、液固体积质量比、搅拌速度、SO_2分压对锌、铁、铜、铟浸出率的影响。结果表明:用SO_2对锌浸出渣还原浸出,可有效缓解溶液中高浓度三价铁离子对铁酸锌分解的抑制作用,大幅提高有价金属浸出率;浸出渣主要物相为PbSO_4和ZnS,铁酸锌完全分解。     

用硫酸从氧化铜矿石中浸出铜试验研究

研究了用硫酸从氧化铜矿石中浸出铜，考察了矿石粒径、硫酸浓度、浸出温度、浸出时间、双氧水添加量、搅拌速度和液固体积质量比对铜浸出率的影响。结果表明：在矿石粒径—74μm占80%,硫酸浓度2.5 mol/L、浸出温度60℃、浸出时间150 min、双氧水添加量100 mL/kg、搅拌速度100 r/min、液固体积质量比6∶1条件下，铜浸出率可达95.1%;浸出渣中仅有少量被脉石包裹的铜矿物未反应，其余大量铜矿物基本反应完全生成硫酸铜，浸出效果较好。     

从铜冶炼烟尘中氧压浸出有价金属试验研究

研究了用硫酸体系从铜冶炼烟尘中氧压浸出有价金属Cu、Zn、In,考察了氧分压、温度、反应时间、初始酸度、液固体积质量比和搅拌速度对Cu、Zn、In浸出率的影响。结果表明：在氧分压0.8 MPa、温度130℃、反应时间2 h、初始硫酸质量浓度120 g/L、液固体积质量比5/1、搅拌速度500 r/min条件下,Cu、Zn和In浸出率分别为96.35%、98.38%和92.40%,有价金属浸出效果较好。     

含铜钴硫酸渣中铜钴同步浸出试验研究

本文以含铜、钴硫酸渣为原料,采用直接酸浸方式回收其中的铜、钴,探究了原料细度、浸出温度、搅拌速度等工艺参数对铜钴浸出率的影响。在不磨矿、浸出温度为70℃、搅拌速度为400 r/min、液固比为4∶1、硫酸质量浓度为160 g/L、浸出时间为4 h的最佳浸出条件下,铜、钴浸出率分别为72.16%,70.81%。铜钴化学物相分析表明,硫酸渣中硫酸铜质量分数最高,次生硫化铜质量分数最低,在硫酸体系下,硫酸铜、自由氧化铜物相较易浸出。硫酸渣中钴主要以硫酸钴、亚铁酸钴、四氧化三钴形式存在,还含少量硫化钴和氧化亚钴。在硫酸体系下,硫酸钴和硫化钴易被浸出,四氧化三钴和亚铁酸钴较难浸出。     

布袋灰中有价金属锌和铜的浸出试验研究

研究了用硫酸从布袋灰中浸出有价金属锌和铜,考察了硫酸浓度、浸出温度、浸出时间、液固体积质量比对锌、铜浸出率的影响。试验结果表明:用浓度为1.61mol/L的硫酸,在温度95℃、液固体积质量比6∶1条件下搅拌浸出2h,锌浸出率达97.23%,铜浸出率达96.78%,浸出效果较好;砷随铜、锌浸出进入浸出液。     

用钛白废酸从硫酸渣中浸出铜

研究了用钛白废酸从硫酸渣中浸出铜,再用硫化钠从浸出液中沉淀铜,考察了废酸质量浓度、液固体积质量比、搅拌时间对铜浸出率的影响。结果表明:在废酸质量浓度123 g/L、液固体积质量比3/1、温度30℃条件下搅拌浸出3 h,铜浸出率达82.1%;浸出矿浆用石灰乳中和至pH=4.0,液固分离后用硫化钠沉淀铜,铜回收率为81.45%,沉淀物中铜质量分数为34.5%;沉铜后的废水用石灰中和后循环使用。此工艺可实现以废治废,回收有价金属。     

China's Major Non-ferrous Metals Imports & Exports

正~~     

Zinc Production by Province in 2014

正~~     

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.