共查询到14条相似文献,搜索用时 169 毫秒
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针对吉林某难处理含铜金精矿进行了硫脲浸金试验研究,考察了硫脲用量、硫脲浓度、三价铁离子浓度和浸出时间等因素对浸金效果的影响。试验结果表明,在矿浆液固比为4∶1,矿浆pH值为1,硫脲用量160kg/t时,常温浸出8h,金的浸出率可由全泥氰化浸出的57.14%提升至91%以上。浸金过程中铜的浸出率保持在2.5%以下,铜浸出较少。 相似文献
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某含铜难浸金精矿常规硫脲浸出率仅48.71%,采用细菌预处理及磁场强化浸出后金浸出率可达92.86%。在常规硫脲浸出、低氧细菌预处理及氧化渣浸金试验中添加磁场可明显促进金的浸出,提高浸出率。 相似文献
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酸性硫脲浸出废旧手机线路板中金的研究 总被引:1,自引:0,他引:1
采用硝酸氧化预处理-酸性硫脲浸金法浸出废旧手机线路板中金, 考察了物料粒度、氧化剂Fe2(SO4)3质量分数、pH值、硫脲浓度、温度等因素对酸性硫脲浸金过程的影响, 结果表明: 物料粒度越小, 金浸出率越高; 当氧化剂Fe2(SO4)3用量0.3%、pH值1.5、硫脲浓度12 g/L、温度30 ℃, 磁力搅拌反应2 h, 金浸出率为88.54%。硝酸氧化预处理-酸性硫脲浸金工艺能高效、无毒地浸出手机线路板中的金, 为“城市矿山”开采提供技术支撑。 相似文献
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酸性硫脲中的炭吸附浸金工艺 总被引:4,自引:0,他引:4
本文论述用硫脲作浸出剂,从含金10.55gt/的金矿中回收金的优越性。从金回收率、浸出时间和化学试剂消耗量等指标看,硫脲浸出液加炭比常规浸出更有效。炭浆浸出13h,金的回收率可达97.5%。 相似文献
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本文论述用硫脲作浸出剂,从含金10.55gt/的金矿中回收金的优越性。从金回收率、浸出时间和化学试剂消耗量等指标看,硫脲浸出液加炭比常规浸出更有效,炭浆浸出13h,全的回收率可达97.5%。 相似文献
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银金精矿的硫脲与氰化物浸出及难浸原因探讨 总被引:8,自引:0,他引:8
研究了非控电位与控电位下银精矿的硫脲浸出过程及其氰化浸出工艺,并通过化学物相分析查明银金精矿难浸的原因.结果表明:由于约50%的银包裹在黄铁矿等载体矿物中,采用硫脲或氰化浸出工艺前须对银精矿进行预处理;同时发现在银金比很大的情况下,银金矿中有机炭的“劫金”作用微弱. 相似文献
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《Minerals Engineering》2006,19(13):1301-1306
In this paper, fundamentals, development and the recent research progresses of gold leaching in alkaline thiourea solution, which is the most prospective substitute for dissolving gold in cyanide solution, are reviewed. The mechanism of gold dissolution is the theoretical foundations for gold leaching in thiourea solution. The suitable oxidant should be the substances with moderate redox potential. An efficient stabilizing reagent selected for alkaline thiourea must be satisfied with two conditions: i.e., easily forming hydrogen–sulfur bond and a stable orbicular structure with thiourea molecular in alkaline medium. A series of electrochemical behaviors, adaptability to leach different gold ores and the correlative fundamentals have been studied in detail, gold leaching rate has been improved to 82.68%, the selectivity of gold dissolution has been anatomied based on complex theory. At present, the dissolution process and mechanism are not very well understood, the leaching rate is still lower than that of cyanidation and further studies are needed. It should be believed that gold leaching rate would be improved on a large degree when the key questions are resolved. These fundamentals are of vitally importance that gold leaching in alkaline thiourea solution quickly, high-efficiently and nontoxically will be realized industrially and successfully, translation of this new method into productivity will be quickened, widely industrial application of alkaline thiourea will be propelled, and persistent and harmonized development of gold industry will be accelerated. 相似文献
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以湖南黄金洞高砷高硫金精矿为原料, 开展了金精矿/软锰矿联合浸出提取金、锰新工艺研究。两矿氧化还原浸出, 可同时实现软锰矿还原浸出与黄铁矿、毒砂氧化分解。两段氧化还原浸出条件为: 两矿比5.4∶1, 酸矿比0.98∶1, 温度90 ℃, Ⅰ、Ⅱ段浸出时间分别为4 h和24 h, 在此条件下锰浸出率大于95%, 黄铁矿、毒砂分解率达到了99%; 氧化还原浸出渣金氰化浸出率随黄铁矿、毒砂氧化分解率提高而提高, 但在硫化矿几乎完全氧化分解情况下, 仅为70.56%, 有待进一步查明原因, 从而优化氰化浸出工艺条件。 相似文献