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《黄金》2002,(8)
专利申请号 :9410 86 6 9 公开号 :1118378专利名称 :难选冶含金矿石或精矿的细菌预氧化方法文摘 :本发明是利用细菌对难选含金矿石或精矿预氧化 ,氧化后的残渣用常规的氰化法提金的一项新技术。细菌是以氧化亚铁硫杆菌为主的混合菌。氧化时矿浆浓度 2 0 %~ 40 % ,温度 30~ 45℃ ,用OK培养基 ,氧化 1~ 4d ,之后用常现的氰化法提金 ,金回收率可达 90 %~95 %。解决了原有工艺存在的环境污染严重、基建投资大、生产成本高及操作复杂等缺点 ,是一种处理难选冶含金矿石或精矿的理想方法。专利申请号 :9410 775 4 公开号 :11… 相似文献
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本文介绍了吉林省某金矿难选冶矿石提金工艺结果。该矿石难选冶的原因在于金嵌布粒度微细,且大量自然金以显微或超显微状态包裹在毒砂及黄铁矿矿物之中,另含有一定量的有机炭。试验采用原矿氰化-浸渣浮选-浸渣浮选精矿碱浸热压氧化-氧化渣氰化提金工艺,获得了金总回收率为90.50%~91.53%的结果. 相似文献
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徐小龙 《有色冶金设计与研究》2004,25(2):1-4,8
针对微细粒浸染型原生金矿,矿石为低硫化物,含砷、炭难选冶金矿石,介绍了采用浮选、浮选精矿细菌氧化或焙烧氧化-氰化浸出两种不同回收金的有效途径,并阐述了适合该金矿的选冶工艺。 相似文献
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An combined technology of pressure pretreatment with oxygen on refractory gold ores is pointed out and discussed on this paper, according to the experiments included the test in 1kg grade batch pressure pretreatment with oxygen of the concentrate from the refractory gold ores of Dongbeizhai in Sichuan province, which is called the most refractory gold ores in China. It is shown that gold recovery reach 91.73% in the combined process which is described as follows The flotation of the sulphide gold ores is under controlled conditions, producing the concentrate for pressure pretreatment with oxygen in acidic medium and the middling for the pressure pretreatment with oxygen in alkaline medium. The thickening and washing process substitute the pressure filtration process of the pulp after pressure pretreatment. The thick slimes of the two kinds of pressure pretreatment were mixed and then enter the CIL process for simplifying the flowsheet. The possible superabundance of acid of pressure pretreatment with oxygen in acidic medium was neutralized by the tailings of flotation and the cost of neutralization will be lower. The combined technology of pressure pretreatment with oxygen has the same advantages as the normal technology of pressure pretreatment and both is helpful for environment protection. 相似文献
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从设计观点看难浸金矿石的预处理工艺 总被引:1,自引:0,他引:1
本文从工厂设计的角度,评述现行的预自理工艺,并从技术,经济,环境等方面进行比较,结合国情和资源特征,提出了现阶段适宜的工艺选择。 相似文献
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碳质微细粒浸染型金矿的直接氯化浸出工艺 总被引:4,自引:1,他引:3
论述了碳质金矿的矿物学特性,次氯酸钠氯化法直接浸出碳质微细粒浸染型难处理金矿的工艺过程和操作条件,讨论了不同因素对浸出过程的影响,评述了水溶液氯化法浸取贵州某碳质难处理金矿的试验结果。 相似文献
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《Hydrometallurgy》2001,59(2-3):233-239
Modern commercial application of biohydrometallurgy for processing ores became reality in the 1950s with the advent of copper bioleaching at the Kennecott Copper Bingham Mine. Early application entailed dump leaching of low-grade, low-value, run-of-mine material. Dump bioleaching has evolved into a commercially accepted option for bioheap copper leaching of higher-grade, higher value ores. This commercial practice is exemplified by at least 11 mining operations. Paradoxically, application of biohydrometallurgy in the pretreatment of refractory gold ores began with processing high value concentrates, using biooxidation-tank processes and was followed by extension to processing low-grade, lower value ores in heaps. Now, bioleaching has been extended to the commercial extraction and recovery of cobalt. Even with the current success of biohydrometallurgical applications in the mining industry, the real potential of biotechnology in mining remains to be realized. As confidence in commercial bioprocessing grows and experience extends the application's knowledge base, innovations and new commercial practices will emerge. Near-term future commercial applications will likely remain focused on recoveries of copper, gold and possibly nickel. Recent technical advances show that very refractory chalcopyrite can be successfully bioleached. Processes for copper recovery from this mineral will include both heap and stirred-tank reactors. Next generation technologies for pretreatment of refractory gold ores will be based on use of thermophilic bacteria for sulfide oxidation. For biohydrometallurgy to commercially advance, the microbiologist must work cooperatively with the practitioners of the technology for mutual understanding of operational limitations and practical constraints affecting the microbiological component. 相似文献
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唐国标 《有色冶金设计与研究》2014,(1):9-12
介绍了超细磨在微细粒级嵌布的难浸金矿中作为预处理技术的基本原理、特点及工业应用实践,总结了超细磨技术作为难浸金矿预处理技术的研究现状,指出超细磨技术在难浸金矿的应用前景和发展趋势。 相似文献
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关于难选金矿石的处理 总被引:4,自引:1,他引:3
本文较详细地综述了难选金矿石的分类;难选金矿石的预处理方法,以及难处理金矿石预处理后氰化、强化氰化、非氰化浸出等方法,并对各种方法进行了比较和评述。 相似文献