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焙烧氰化尾渣回收金银研究 总被引:9,自引:4,他引:5
研究从青海滩涧山氰化尾渣回收金银的过程。结果表明,采用焙烧、加煤焙烧、中温氯化焙烧、硫酸预处理工艺效果均不理想,而采用高温氯化法时金银回收效果良好。在氯化钙添加量5%、焙烧温度1 200℃、焙烧时间1 h时、金挥发率达到89.57%,银挥发率53.46%,同时,铁基本不挥发,砷有少量挥发。 相似文献
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从提金渣中回收金银的研究 总被引:7,自引:3,他引:4
采用高温氯化工艺对新疆某提金渣进行提取金、银等有价元素的研究。结果表明:在干式混料,粉状焙烧,氯化挥发温度1 000℃,氯化时间30 min,CaCl2用量5%的条件下,金、银挥发率分别为95.19%和59.26%。 相似文献
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研究采用高温氯化工艺回收焙烧氰化尾渣中的有价金属。结果表明,在氯化钙添加量7%、1 100℃焙烧2h的条件下,Au、Ag、Cu、Pb、Zn的挥发率分别达到97.52%、71.78%、85.92%、98.59%、93.81%。球团采用梯级烘干的干燥工艺,经40min干燥后,干球团落下强度10次/0.5m,抗压强度90%100N,基本符合回转窑进料的强度要求。 相似文献
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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。 相似文献
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以氰化尾渣为主要原料,配以膨润土、钠长石、CaCl2、煤粉等辅料,利用高温氯化焙烧方法制备了陶粒。采用XRD、SEM、XRF、TG/DTA、ICP-OES等研究了氰化尾渣的物相成分、微观结构等理化性能,测定了陶粒成品的吸水率、堆积密度、重金属挥发率等,并对烧成效果最好的陶粒成品进行了微观结构分析。结果表明,氰化尾渣利用率最高能达到75%,得到的焙烧陶粒1h吸水率为9.45%、堆积密度为642.93kg/m3,Au、Ag、Cu、Pb、Zn等金属挥发率分别达到83.02%、65.31%、75.89%、90.65%、85.34%。 相似文献
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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。 相似文献
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<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 相似文献
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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, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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. 相似文献
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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. 相似文献