铁帽型金矿石制粒堆浸提金试验研究

为解决高泥质金矿石金浸出率低的问题，对某铁帽型金矿石开展了制粒堆浸提金的现场试验研究。试验结果表明，对于这类含泥较多的铁帽型金矿石，采用制粒堆浸工艺，可以获得较好的技术指标。金的浸出率由常规浸出法的33％提高到72％。     

含金褐铁矿直接堆浸的初步探讨

本文对吴家金矿含金褐铁矿石进行直接堆浸试验,取得较好指标(金浸出率达到75％)作了简要论述,并探讨了制粒堆浸失败的原因和多雨季节堆浸过程应注意的事项,为该地区泥质氧化矿石(铁帽型金矿)直接堆浸提供了成功的经验。     

适于金矿堆浸的制粒新技术研究

堆浸是处理低品位含金矿石的有效方法,然而细粒物料和黏土含量太高的矿石不宜直接堆浸,需先进行制粒预处理,提高矿堆的渗透性,且制粒可大大强化金的浸出,加快金的浸出速度,提高金的浸出率。以某难处理金精矿为原料,使用粒矿和粉矿混合制粒法开展制粒实验,以水泥、石膏、膨润土、聚丙烯酰胺、石灰或几种粘结剂组合作为粘结剂,进行了多组制粒实验。研究表明,由于石膏的浸出性能太差,不适合作为制粒粘结剂;当粒矿与粉矿配比为1∶2,加水量为140~160 mL/kg时,采用适量水泥、石灰与聚丙烯酰胺组成的复合粘结剂开展制粒实验时获得了良好的制粒效果。     

某红土型金矿石制粒堆浸试验研究

辽宁某红土型金矿矿体规模较大,黏土矿物含量高,矿石金品位1×10 - 6 ～5×10 - 6 。应用制粒堆浸提金工艺处理该红土型金矿石,有效克服了黏土矿物对堆浸的不利影响,金浸出率高达91.95 % ,生产成本低,经济效益显著。     

从代家冲选厂生产实践浅析铁帽型含金矿石提金工艺特点

本文就铁帽型金矿石提金工艺的关键因素如自磨、全泥氰化、充气搅拌浸出等进行总结,对铁帽型矿石提金有较普遍的指导意义。     

矽卡岩铁帽型金矿石堆浸提金工艺特性

采用低浓度NaCH、低pH值堆浸工艺条件,处理含铜、呈酸性的铁帽型金矿石,可降低NaCH和碱的消耗,同时也有利于炭吸附,可提高岩吸附率和载金炭品位。     

低品位铜镍钴氧化矿堆浸扩大试验

针对某低品位铜镍钴矿矿区规模大、浸出成本高的特点，提出了堆浸工艺。在Φ290 mm×6 000 mm的堆浸柱中模拟工业堆场，进行了硫酸堆浸扩大试验。主要考察了配矿比例、原料粒度、浸出天数、细菌添加等因素对堆浸效果的影响。结果表明，筛分后制粒可显著提高料柱渗透性，Cu的最终浸出率可达73%,其中加入硫酸亚铁可以提升Co、Ni的浸出率，而添加细菌浸出可降低浸出硫酸用量。本研究可为低品位铜镍钴氧化铜的堆浸工艺工业应用提供技术支撑。     

含砷锑碳低品位难浸金矿石氰化浸出工艺试验研究

介绍某难浸金矿石的特性及在某些条件下的全泥氰化和柱浸试验结果，以及含碳低品住金矿石堆浸时提高金浸出率的有关措施。     

浅论地表堆浸中影响浸出效果的因素

以某铜矿和某铀矿的堆浸试验为基础，简述了地表堆浸中影响浸出效果的因素及其相互关系。将为今后的生产实践提供设计和决策参考依据。     

铜绿山难选氧化铜矿石制粒堆浸新工艺研究

按照常规硫化浮选工艺处理铜绿山难选氧化矿，选铜回收率一般为40％。采用制粒堆浸新工艺处理该矿石，铜浸出率可达到69．51％，金浸出率为72．46％。基于此，推荐了酸化制粒浸铜-氰化浸金-浸出渣回收铁的原则工艺流程。     

对加温及增强渗透提高浸堆金浸率的探讨

采用堆浸法提金工艺处理低品位金矿的技术在世界发达国家或地区已经日益趋于成熟,我国在研究应用低品位金矿堆浸技术方面也已经取得了较大成就, 但对低温地区的浸堆加温及含粉矿、粘土矿物较高的金矿石解决渗透性的堆浸技术方面, 我国矿业界仍需要加快研究,以利于我国黄金工业发展和金矿资源保护。     

某低品位高硫高碳难处理金矿无氰堆浸工艺工业试验研究

贵州泥堡金矿为低品位高硫高碳高粘土含砷的微细粒难处理金矿,采用新型环保型浸金药剂进行浸金工业试验,取得了与氰化浸金工艺相当的效果.此法的成功应用和推广对今后金矿的无氰堆浸生产有一定的指导作用.     

云南某卡林型金矿石堆浸生物氧化半工业试验

云南某金矿矿石,含砷及吸附氰化已溶金碳质物和黏土矿物,金以超显微赋存于其他矿物中,属卡林型金矿石,直接氰化金的浸出率为3．17％-4．7％。采用堆浸生物氧化,经过6个月的预处理后,矿石中金的堆浸氰化浸出率可达65．5％。     

某低品位金矿无氰堆浸工艺工业试验研究

介绍了某低品位金矿无氰浸堆工艺工业试验结果,采用无氰堆浸工艺可有效地从低品位金矿石中回收金,而且浸出率高,浸出时间短,无毒,有推广应用价值。     

含金全泥质氧化矿堆浸喷淋技术的改进

含金全泥质氧化矿的堆浸,矿石泥化严重,渗透性差,原生产采用滴淋管喷淋,矿堆顶面积水严重,喷淋不均匀导致矿石堆浸的金浸出率低,浸出周期长,通过生产改进,将滴淋管改为水带喷淋,有效解决了滴淋管喷淋不均匀、积水严重等问题,明显提高了堆浸效果和金的浸出率。     

在风大干旱地区机械化堆浸提金的筑堆问题

科学的筑堆方法,是大规模机械化堆浸提金获取成功的重要保证,它是实施堆浸提金工程的关键技术环节。本文以在新疆萨尔布拉克2.4万吨规模的成功的堆浸提金试验为例,介绍在风大干旱地区机械化堆浸提金的筑堆方法。     

Hydrometallurgy of precious metals recovery

The hydrometallurgical process for the treatment of gold and silver ores remained unchanged for the first 70 years of this century, and consisted essentially of leaching in cyanide solution followed by solid-liquid separation, with the solid residues being washed as efficiently as possible, and the leach liquor being treated by zinc cementation to recover the precious metals. White this process is generally extremely efficient and fairly cheap, it does have limitations in the treatment of low-grade ores and certain complex ore types. For example, ores with a high content of clay or other soft, fine minerals are usually difficult to filter, and losses of soluble gold or silver in the residues can be unacceptably high. In other situations, where the precious metal host rock contains high concentrations of sulphides such as pyrite or arsenopyrite, for example, or base-metal oxides or carbonates, the traditional process often suffers from poor gold recovery (due to encapsulation of the precious metals in the sulphides) or high cyanide consumption, or both of these. Whereas these occurrences were fairly rare (or were avoided!) in the first half of this century, they are now assuming great importance, and each year a higher percentage of world gold production derives from sources such as these.A number of new hydrometallurgical processes have been developed and implemented in the gold industry in the last 20 years, and these have transformed gold processing into a chemical “high tech” industry, and have allowed increasingly complex ore types and progressively lower grades of ore to be treated economically. As a result, in a period when gold production might have been expected to decline, world-wide production has almost doubled over the two decades.This paper describes the traditional cyanidation and zinc cementation processes, but focuses on the new developments in the industry. In particular, new leaching technologies such as heap leaching for low-grade ores and pressure leaching for refractory sulphide ores are discussed, as well as the carbon-in-pulp and carbon-in-leach processes that have effectively replaced filtration and countercurrent decantation on almost every gold plant built since 1980. Some emerging technologies such as bacterial leaching and resin-in-pulp are also discussed briefly.