某氰化尾渣中金的浮选回收试验研究

某氰化尾渣金属矿物以黄铁矿为主,有极少量闪锌矿、方铅矿和黄铜矿,脉石矿物以石英为主。该尾渣中主要可回收元素为金,金主要赋存于黄铁矿等硫化物中,因其与硫化物关系密切,采用浮选法对其进行富集。经浮选条件试验及开、闭路试验研究,获得了不磨浮选金精矿品位25．01g／t,金回收率46.35％;再磨浮选金精矿品位47．50g／t,金回收率57．65％的较好指标。     

氰化尾渣综合回收试验研究

辽宁某氰化尾渣金品位2.01 g/t,银品位36.23 g/t,铜、铅、锌品位分别为0.33%、1.91%、3.01%。针对该氰化尾渣进行铜铅锌混合浮选试验及优先选铅—尾矿选锌浮选试验。铜铅锌混合浮选试验可获得金品位13.72 g/t、银品位281.70 g/t、铜品位3.63%、铅品位16.01%、锌品位36.92%,金、银、铜、铅、锌回收率分别为50.09%、57.22%、80.69%、61.33%、90.88%的混合精矿;优先选铅—尾矿选锌浮选试验可获得铅品位48.95%、铅回收率52.29%的铅精矿,锌品位43.21%、锌回收率89.45%的锌精矿,铅精矿中金、银、铜品位分别为54.02 g/t、891.42 g/t、5.92%,锌精矿中金、银、铜品位分别为2.43 g/t、134.79 g/t、2.19%,总金、总银、总铜回收率分别为62.39%、73.43%、77.76%。选别指标良好,为该类氰化尾渣资源的综合回收利用提供了参考依据。     

浮选精矿氰化尾渣金、银回收研究

对致使含硫、砷浮选金精矿氰化浸出率低,尾渣全、银品位高的原因进行了分析;介绍了目前在提高氰化尾渣金、银浸出率方面所采用的措施,指出通过加入混合添加剂、采用两段焙烧、氰化前加入助浸剂共磨,可使尾渣中金、银的氰化浸出率提高到82．92％和61．54％,品位降至0．55g／t和30g／t。     

氰化尾渣中金的回收及无害化处理试验研究

湖南某地区的氰化尾渣中含有一定的氰化物、砷化物(0.42%)及少量的金(1.2 g/t),若直接堆存,不仅污染环境,而且浪费资源。该文采用浮选法对氰化尾渣中的金和砷进行了综合回收试验研究,其结果表明:氰化尾渣经再磨矿后,通过浮选工艺处理,所得粗金精矿中金品位为66.07 g/t,金回收率为63.06%,最终排放尾矿中砷质量分数为0.17%,砷回收率为70.37%。同时,尾矿中加入漂白粉后,经泵扬送至尾矿库,库内澄清水返回选矿厂循环利用,实现了尾矿废水零排放。     

马达加斯加Maevatanana矿区低品位含金矿石选矿试验研究

马达加斯加Maevatanana矿区矿石工艺类型为石英脉型含金氧化矿石。矿石中硫化物为0.25%,金品位较低,为0.8 g/t。通过提金探索试验表明,采用氰化浸出提金工艺与重选—浮选联合工艺时,其尾渣品位相差不大。综合考虑该地区对环保的要求及经济效益,避免氰化尾渣污染环境,适宜采用重选—浮选联合工艺处理矿石。     

氰化尾渣还原焙烧—烧渣浮选富集金铜的试验研究

某复杂多金属金精矿采用直接氰化工艺提取金银后产出的氰化尾渣含Au 1.20 g/t、Cu 0.52％、S 47.50％、Fe 41.02％,具有较高的回收价值.采用还原焙烧—烧渣浮选工艺流程回收金、铜等,在最佳条件下,获得的金铜精矿产率为9.52％,金、铜品位分别为15.20 g/t、6.82％,回收率分别为76.16...     

金精矿氰化尾渣综合回收金硫工艺试验研究

某黄金冶炼厂金精矿采用直接氰化提金工艺处理，产出的氰化尾渣用作硫酸生产原料，硫元素得到利用，但其中的金没有得到回收，造成资源浪费。试验采用氰化尾渣脱氰、浮选工艺回收金、硫，结果表明：在一级加热脱氰，二级酸化深度脱氰，三级活化选硫选金工艺技术条件下，获得的金硫精矿中金、硫品位分别为1.75 g/t、48.60%,金、硫回收率分别达到81.50%、96.50%,实现了金精矿氰化尾渣中有价元素金、硫的综合回收。     

某氰化尾渣中硫浮选回收工艺研究

为实现氰化尾渣中硫的资源化、无害化利用,对某氰化尾渣回收铅锌铜后的浮选尾矿进行硫浮选回收工艺研究。在矿浆浓度为35%、pH值为5、预处理时间为60 min、捕收剂丁基黄药用量为500 g/t和起泡剂2号油用量为30 g/t的条件下,最终可获得品位在40%以上、回收率在80%以上的硫精矿,实现了氰化尾渣中硫资源的高效回收,并具有良好的经济和社会效益。     

氰化尾渣中微细粒低品位金回收技术研究与应用

针对某黄金生产企业氰化尾渣选硫生产过程中,微细粒低品位金无法回收利用造成资源浪费情况,开展系统试验研究。以现有氰化尾渣选硫系统为基础,以氰化尾渣及硫精矿为试验对象,进行金回收技术方案条件试验,最终形成氰化尾渣经现有选硫系统进行金、硫富集后,进行旋流器分级生产高金硫精矿和低金硫精矿技术方案。该技术方案成本低、易于工业化实施。现场改造后,产出金品位大于3.0 g/t、硫品位大于46.5%的高金硫精矿和硫品位大于46.5%的低金硫精矿2种产品,最大限度地提高了经济效益。     

氰化尾渣中金的回收试验研究

某黄金矿山生物氧化-氰化炭浸工艺产生的氰化尾渣中金品位较高,为2. 40~3. 60 g/t。试验考察了焙烧氧化-氰化浸出工艺回收金的可行性。结果表明:在焙烧温度500℃、弱氧化气氛下焙烧120 min,获得的焙砂在氧化钙用量15 kg/t、矿浆浓度33%、氰化钠用量1. 0 kg/t、浸出时间24 h条件下进行氰化浸出,浸渣产率为88. 80%,金浸出率在94. 92%以上;采用焙烧氧化-氰化浸出工艺回收氰化尾渣中的金是可行的。该研究为氰化尾渣中金的回收利用提供数据参考。     

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.