倾斜薄金矿脉采场底部结构优选

以北干沟金矿的地质条件和开采现状为条件，对倾斜薄金矿脉采场用混凝土假底柱结构或矿石底柱结构这两种结构形式进行了优化选择。优选条件是该矿段开采金的经济品位界限，计算的矿体金地质品位大于２．５２ｇ／ｔ时可选择假底柱结构。     

岩金矿山薄与极薄矿脉开采的几个问题探讨

薄与极薄矿脉开采的岩金矿山占我国者金地质总储量一半左右。它们所使用的采矿方法为空场法与充填法，由于黄金地质资源之宝贵，所以绝大多数矿山都采用无矿柱采矿法。本文介绍几种新型的人工底柱构筑方法，以及提高采场生产能力的几项研究成果。     

采用矮底柱装矿结构回采边部矿体

<正> 我矿杨林坳钨矿区西南边缘部分,在四中段以上有矿量约1.8万吨,品位高达0.8～1.74％。开采这部分矿体,底部结构无法布置在矿体下盘,只能布置在矿体中,要求底柱高度越小越好。经过方案比较,认为电耙道、普通木漏斗的底部结构和无底柱结构都不适用。最后提出了用矮底柱装矿结构的方案。矮底柱装矿结构,按底柱高度不同,分为两种     

混凝土人工假底空场法采矿

对于品位较高的矿段 ,在矿岩条件允许的情况下 ,采用混凝土人工假底替代底柱用空场法进行采矿 ,能够取得较理想的技术经济效果。     

栾木厂金矿削壁充填采矿法的底柱回采

介绍了栾木厂金矿削壁充填采矿法底柱回采的人工假底构筑方法,确定了底柱回采的盈亏平衡品位。矿山实践证明,取得了较好的经济效益。     

栾木厂金矿削壁充填采矿法的底柱回采

介绍了栾木厂金矿削壁充填采矿法底柱回采的人工假底构筑方法,确定了底柱回采的盈亏平衡品位,矿山实践证明,取得了较好的经济效益。     

花岗岩型低品位铀矿体开发技术探讨

矿产资源是不可再生资源,如何开发利用低品位铀资源,使矿山企业有一定的经济效益,重点论述开采矿石品位变化与开采吨铀金属成本变化测算。探讨原地爆破浸出采铀、有(无)底柱崩落法、分采分爆留矿法开采低品位铀矿的可行性等。     

崩落采矿法残留大块矿石回收工艺研究与实践

随着崩落法开采标高的不断下降,放矿中大块逐渐积累增多,矿石损失和贫化增大。为解决该问题,根据崩落采矿法的基础理论,结合太白公司实际情况,确定了放矿截止品位,并分析了影响生产的主要因素,提出了底柱及残留大块矿石回收工艺改造方案。现场应用结果表明,改造后的出矿结构每天出矿量为600 t左右,金的平均品位在0.8 g/t以上,取得了良好的效果。     

采用人工假底回采顶间柱残矿

本文介绍山东省乳山金矿采用人工假底替代矿石底柱提高经济效益的经验。     

新疆艾维尔沟矿区石灰岩经济地质研究

通过对新疆艾维尔沟矿区科克萨特石灰岩矿的勘查、取样分析，以经济的角度综合研究了该矿区的储量、品位、及其它开采相关的地质条件。结果表明：该矿区储量理想，品位高，开采地质条件相对简单，市场投资回报率高。     

某金矿工艺矿物学研究北大核心

为了查明阿根廷某金矿化学成分、结构构造、矿物组成、载金矿物的粒度和解离度以及金的赋存状态等工艺矿物学特征,采用化学分析、镜下鉴定、X射线衍射、电子探针、MLA等测试手段,对其进行详细的工艺矿物学研究。结果表明,矿石中金(Au)含量为35.916 g/t,矿石中主要载金矿物为自然金、石英、白云母、硅孔雀石、褐铁矿、赤铁矿、孔雀石、氯铜矿,金的赋存形式有两种,一种是以独立矿物的形式赋存于自然金中,占金分配率的79.38%;另一种是以机械混入的形式赋存于石英、白云母、硅孔雀石、褐铁矿、赤铁矿、孔雀石、氯铜矿中(光学显微镜及扫描电镜均无法识别)。金的分布主要集中于自然金中,且自然金粒度主要在0.08~0.64 mm,建议采用“重选—浸出”混合工艺对该矿石中的金进行有效回收。     

我国黄金产业发展的思考

通过对美国地质调查局和世界黄金协会大量统计资料的深入分析,认为黄金是一种特殊的金属矿产品,也是当前世界经济低潮中最具保值功能的投资品种.近年我国的黄金生产稳步发展,产量逐年提高,但保有储量一直稳定在1200t,未能有所增长.我国的黄金储备相对于其它国家黄金储备和我国外汇总储备而言,总体偏低,建议选择合适的时机,适当提高我国黄金储备量.要保障我国黄金产业的稳步健康发展,应当从产业源头抓起,持续加强黄金地质勘查工作,不断提高我国黄金资源的保有储量.     

Gold losses from cyanide solutions part II: The influence of the carbonaceous materials present in the shale material

Gold was found to be mainly adsorbed onto the carbonaceous particles in the Beatrix shale material with possible minor loss of gold due to co-precipitation of gold with Mg(OH)₂ and Fe(OH)₃.Two types of carbonaceous material were present in low concentrations in the Beatrix shale and resembled kerogen. The one type can be described as filamentous particles and the other as roundish particles. Rank measurements done on the carbonaceous particles in the shales showed that they fall in the anthracite range. Adsorption of gold on carbonaceous material of similar rank showed that anthracite has the highest propensity to adsorb gold. This suggests that the carbonaceous particles would have similar gold adsorption properties as anthracite. The lack of an obvious correlation between the propensity of a shale to adsorb gold and its carbon content is probably due to the fact that not all the carbonaceous particles are liberated during milling so that they can be brought into contact with' the gold cyanide solution.     

矿石中微量金的测定研究

德兴铜矿铜厂矿区矿石中金的平均品位为0.196g/t。由于矿石中金的品位太低，现行分析方法的偏差较，这给金的生产指导带来了困难。为了解决这一难题，研究采用泡沫塑料预富集金，再将泡沫塑料消解，用有机试剂萃取，使用有机相直接喷雾测定金。使用这一方法，有效提高了测定金的准确性和灵敏度。     

黄铁矿中金的性状及其利用

黄铁矿是金的主要载体矿物,金在黄铁矿中的分布是不均匀的,其金的含量高低相差可达数十倍。对金矿床本身而言,一般细粒级、破碎的黄铁矿含金量高。对黄铁矿本身而言,结晶形态不同的黄铁矿其含金量也相差很大。黄铁矿中金主要是以自然金的形式赋存于其中,其产出形态受到矿物本身结构构造控制多呈片状、脉状、无规则状。扫描电镜分析结果表明,在可见金及显微金周围容易发现次显微金。为了提高金的回收率,应特别注意对细粒级黄铁矿中金的回收和利用。     

我国西部金矿资源现状及发展对策

金矿资源是国家经济安全稳定发展的重要保障之一。我国西部地区成矿地质条件优越,金矿资源丰富,已累积查明金矿资源储量(金属量)占全国总资源量比例较大。西部金矿时空分布上具有显著的集中性、分带性特征。近年来,陕甘川、滇黔桂、新疆、内蒙、西藏等地区金矿找矿获得重大成果,未来找矿潜力依然巨大。西部金矿资源找矿的重大进展将重塑我国金矿资源以往的东西部战略分布格局。预计在未来十几年,西部地区金矿资源勘查开发将持续在全国占居重要位置。最后,我们针对我国西部金矿资源未来勘查开发,提出加强重点金矿集中区找矿再突破;吸纳多方面勘查资金投入;引进高技术性人才,加强科技支撑力度;注重生态环境保护等对策建议。     

Limits of the CIL circuit in copper–gold plants

This study examined the performance of the CIL (Carbon-in-Leach) circuit at Telfer, a copper–gold plant treating porphyry copper deposits containing gold associated with both copper and iron sulphides, with an objective to identify factors normally limiting the gold recovery in the CIL circuit in the presence of a small amount of copper after copper flotation, and then propose a means to improve it. Diagnostic leaching assessment and mineralogical analysis by MLA revealed that the occlusion of gold by other minerals and the fine grain size of gold associated with them may be the contributing factors to the low gold recovery in the CIL circuit. Fine grinding of the CIL feed increased gold recovery significantly from the leaching process. However, it is interesting to find that fine grinding increased the amount of released copper ions which complex with cyanide resulting in significantly higher cyanide consumption. It is therefore proposed that regrinding of the CIL feed followed by copper flotation is an appropriate pre-treatment method for the CIL circuit.     

Some remarks on the reactor network synthesis for gold cyanidation

Gold cyanidation in most of the plants occurs in a cascade of large tanks because this configuration offers the longest residence time and consequently the highest gold recovery. However, the long contact between the ore and the leaching solution can increases the reactants consumption by side reactions, and in some cases this conventional reactor configuration will not be the most suitable. In this paper, several configurations for a gold leaching circuit with five equal-sized reactors are investigated and the effect of different network configurations on the process performance addressed. It is showed that, for high gold content and low cyanide concentration the conventional in-series configuration is the most recommended; however, for high cyanide concentration and low gold content the in-parallel configuration is the best one. For intermediate values of gold content and cyanide concentration, hybrid configurations with parallel sections at the beginning of the circuit are the best choice. It is also showed that the optimal circuit configuration strongly depends on the gold price and cyanide cost, and for low values of cyanide price the conventional in-series configuration is the most recommended, while for high cyanide prices the hybrid and parallel configurations must be taken into account.     

云南某复杂难处理金矿工艺指标优化试验研究

为综合高效回收利用难处理金矿资源,以云南某复杂难处理金矿浮选尾矿(金品位为0.75 g/t)为研究对象,尾矿通过"再磨再选"浮选工艺获得金精矿,工艺指标良好,金精矿产率2.22%,金品位22.58 g/t,金回收率16.66%(对原矿)。全流程闭路试验获得的金精矿总产率6.67%,金品位41.62 g/t,金回收率92.25%,最终尾矿金品位降至0.25 g/t。研究结果为难处理金矿石的选别提供了有益参考。     

提高河南某低品位金矿金回收率试验研究

河南某低品位金矿具有嵌布粒度不均匀、粒级分布宽和脉石夹杂严重等特点,金矿物的回收困难。为提高金的回收率,在工艺矿物学的研究基础上进行了一系列的选矿试验研究工作。结果表明：①原矿主 要有用矿物为自然金,原矿金品位为1.39 g/t;银品位为3.35 g/t,可以作为伴生金属综合利用。次要金属矿物主要为黄铁矿,另含有少量的黄铜矿、磁铁矿、辉铋矿和方铅矿等,脉石矿物主要为石英、斜长石、绿 泥石、云母、白云石、方解石,其次含少部分角闪石。②金颗粒主要是以包裹金（占58.83%）形式存在,其次是裂隙金（占23.53%）,粒间金占比较小（占17.65%）,其中石英包裹金占19.11%。③在最佳的试验条件 下,采用重—浮联合工艺,经3次尼尔森重选、1次摇床精选,重选尾矿经“1粗2精2扫”浮选,最终可以获得重砂含金986.60 g/t、金回收率为50.42%及浮选精矿含金35.75 g/t、金回收率为41.57%。全流程金的总回 收率达到了91.99%,较好地完成了该矿区金矿物的回收。