某尾渣硫脲浸出金试验研究

对某尾渣,在比较了硫脲、硫氰酸铵、硫代硫酸钠浸金效果的基础上,选择硫脲为浸出刺。试验通过优化浸出条件,确定硫脲质量浓度为15g／L、硫酸用量为55mL、液固比为3、搅拌浸出3h,金的硫脲浸出率可达到93．50％。试验还考察了硫脲溶液循环使用效果,可在一定程度上降低浸金过程中硫脲的消耗。     

硫脲从含金黄铁矿中浸金试验研究

试验研究表明硫脲能够有效浸出黄铁矿中的金。合适浸出的条件是 :硫脲质量浓度8～ 12g/L ,硫酸质量浓度 15g/L ,浸出时间 >10h ,浸出温度 4 0～ 5 0℃     

用硫脲从低品位尾矿中提取金的试验研究

研究了用硫脲从低品位尾矿中回收金.结果表明,在液固体积质量比2∶1、浸出温度25℃、pH为2.0、硫脲质量浓度15 g/L、Fe2(SO4)3质量分数0.4％、超声处理40 min、浸出60 min条件下,金浸出率达77.50％.     

石硫合剂法浸取废弃线路板中金的试验研究

试验研究了采用石硫合剂法浸取废弃线路板中的金。取废弃线路板粉末5 g,在固液比为1∶3、亚硫酸钠浓度为0.1 mol/L、硫酸铜浓度为0.03 mol/L、氨水浓度为0.5 mol/L、反应时间为2.5 h、反应温度为40℃、pH=10条件下,金的浸出率可达到85%以上。与硫脲、氰化等浸金方法比较,石硫合剂法具有无毒、廉价易得、工艺简单、操作方便等优点,是一种具有开发潜力的浸金技术。     

含锑难处理金矿臭氧氧化预处理工艺研究

为解决含锑金精矿难处理的问题,对某含锑金矿进行臭氧氧化浸出锑的实验研究。实验结果表明,氧化浸出优化工艺参数：温度75 ℃,HCl浓度4.5 mol/L,浸出时间4 h,液固比10∶1,臭氧浓度121.9 g/L。在此条件下,锑的浸出率为98.13%,硫的浸出率为43.52%。经过臭氧氧化浸出处理后,矿物中的金得以在渣中富集。对原矿和浸锑渣进行硫脲浸金试验,金浸出率分别为12.36%和70.17%,表明预处理取得一定效果,实现了含锑难处理金矿中锑和金的综合回收。研究结果能为臭氧氧化浸出辉锑矿和含锑难处理金矿预处理提供理论指导。     

硫脲浸金试验研究

对河北某金矿区矿石进行了硫脲浸金试验研究。试验分别考察了硫脲质量浓度、Fe(Ⅲ)质量浓度、浸出时间、浸出方式、p H值等条件对金浸出率的影响。其结果表明,在保证足够硫脲质量浓度的前提下,氧化剂Fe(Ⅲ)与硫脲质量浓度比是影响金浸出效果的第一要素。在Fe(Ⅲ)与硫脲质量浓度比为3.6∶50,连续浸出6 h的最佳条件下,获得了94.83%的金浸出率。     

某难浸金精矿硫脲法浸金试验研究

进行了某富硫高砷金精矿加添加剂CL硫脲浸金试验研究。试验研究结果表明，添加剂CL可以改善硫脲浸金过程，降低浸出所需的硫脲浓度，提高金浸出率，可使该金精矿的金浸出率达到89％以上。试验还探讨了浸出的最佳条件，并分析了添加剂CL对浸金机理的影响。     

响应曲面法优化含银浸出渣浸银工艺研究

以云南某有色冶炼厂湿法含银浸出渣为考察对象,采用硫脲法回收其中的银。实验结果为反应时间5 h、硫脲用量为40 g/L、反应液固比8 mL/g、Fe_2(SO_4)_3用量为0 g/L、浸出温度60℃。在此条件下,所得银浸出率大于88%。以反应时间、硫脲用量、反应液固比为考察因素,通过响应曲面法对该浸银工艺进行优化,得到银浸出率的预测回归方程,其优化得到的工艺条件为反应时间6 h、硫脲用量为50 g/L、反应液固比10 mL/g,在此条件下所得银浸出率91.40%,与理论银浸出率92.15%的结果相差较小,说明预测回归方程和优化的工艺条件可以实际应用。     

从难处理金精矿氯化浸金溶液中吸附金

对国内某难处理金精矿高压氧化渣进行氯化浸出及吸附试验。结果表明,在下述最佳条件下浸金率达到96.5%:次氯酸钠浓度10g/L、pH=4、氯化钠浓度75g/L、温度40℃、液固比3∶1、搅拌速度300r/min、时间120min。浸金液在室温采用1g/L的717阴离子交换树脂吸附30min,金吸附率达到99.2%。该方法污染少、操作简单、反应速度快。     

新疆某铀矿床酸法浸出试验

为探究新疆某砂岩铀矿床矿石的浸出性能,获得不同硫酸浓度条件下矿石的最优浸出条件及参数,对砂岩型铀矿石进行室内不同硫酸浓度(0.2～10g/L)摇瓶浸出对比试验,液固比为5∶1,浸出环境温度为17℃,浸出周期96h,一组添加300mg/L双氧水,另一组不加氧化剂。试验结果表明,未添加氧化剂时,硫酸浓度为8g/L时浸出率最大,酸度增加到10g/L,铀浓度反而下降了5.78mg/L,浸矿在48h便几乎达到了平衡;酸度低于0.4g/L时,浸出5h便出现峰值,继续浸出,浸出率下降。添加氧化剂时,浸出率与硫酸浓度呈正相关,且添加氧化剂后浸出速率加快,但浸出平衡点无明显变化,当酸度低于0.6g/L时,浸出后期出现铀浓度下降,硫酸浓度为8g/L时,浸出率可达97.17%,硫酸浓度增加到10g/L,浸出率并无明显增加。酸法浸出可应用于此铀矿床,且最佳浸出剂硫酸浓度为8g/L。     

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.