新疆西天山汗吉尕多金属成矿带找矿前景分析

汗吉尕多金属成矿带位于新疆西天山,是一个以铅、锌、铜为主的多金属成矿带,该成矿带隶属于中亚成矿域巴尔喀什成矿带,其构造特点呈网格镶嵌断块结构,区内华力西期火山侵入活动发育,在哈萨克斯坦境内发现不少大型、超大型铜、铅锌矿床,如著名的科翁腊德、阿克斗卡、科克赛斑岩铜矿、捷克利铅锌矿等.经分析发现,汗吉尕多金属成矿带成矿地质背景、构造条件无疑是巴尔喀什成矿带延入我国的一部分,具备形成大型矿床的地质条件.     

Acid equilibrium during bioleaching of alkaline low-grade sulfide copper ore

This article reports the study on acid equilibrium during bioleaching of alkaline low-grade copper sulfide ore. Adding auxiliary agents 1# （sulfur） and 2# （pyrite） makes bacterial leaching of copper and acid production carried out simultaneously because the auxiliary agents can be oxidized by bacteria and the oxidation products involve acid. The acid required for dissolving alkaline gangue during bacterial leaching is produced, and acid equilibrium is reached during the ore bio-leaching. The recovery of copper reaches more than 95%.     

紫金山铜（金）矿床的地质特征和勘探特点

福建紫金山铜（金）矿床是与次火山作用有关的中低温热液类型，根据具体矿床地质特征实施的勘探方案主要是金，铜区别对待，铜矿分期勘探，铜矿床勘探类型为第三类，铜矿石进行选，冶联合试验。     

贵州西北部铅锌矿床伴生银的赋存状态

贵州西北部铅锌矿床普遍含有较高的伴生银,银随铅锌品位的增高而增高。矿床中显微级独立银矿物有辉银矿、自然银、硫锑铜银矿和银黝铜矿,主要分布于方铅矿中。但由于锌品位高于沿,闪锌矿成为银的主要载体矿物。银可能主要以超显微矿物包体形式存在于闪锌矿和方铅矿中。     

某难选低品位铜矿的选矿工艺研究

在不同磨矿细度下,对云南某低品位铜矿原矿进行磨矿细度条件试验及流程对比试验,结果表明采用粗磨入选—粗精矿再磨流程,矿石入选细度70%-200目,可获得铜精矿铜品位22.00%、回收率83.72%的分选指标。     

Kinetics of chemical leaching of chalcopyrite from low grade copper ore: behavior of different size fractions

The kinetics of the chemical leaching of copper from low grade ore in ferric sulfate media was investigated using the constrained least square optimization technique.The experiments were carried out for different particle sizes in both the reactor and column at constant oxidation-reduction potential (Eh),pH values,and temperature.The main copper mineral was chalcopyrite.About 40％ of Cu recovery is obtained after 7 d of reactor leaching at 85℃ using -0.5 mm size fraction,while the same recovery is obtained at 75℃ after 24 d.Also,about 23％ of Cu recovery is obtained after 60 d of column leaching for +4-8 mm size fraction whereas the Cu recovery is as low as about 15％ for +8-12.7 and +12.7-25 mm size fractions.A 4-stage model for chalcopyrite dissolution was used to explain the observed dissolution behaviors.The results show that thick over-layers of sulphur components cause the parabolic behavior of chalcopyrite dissolution and the precipitation of Fe3+ plays the main role in chalcopyrite passivation.In the case of coarse particles,transformation from one stage to another takes a longer time,thus only two stages including the initial reaction on fresh surfaces and S0 deposition are observed.     

六盘山地区早白垩世砂页岩型铜矿特征及其找矿前景

六盘山地区砂页岩型铜矿分布范围大于5000km2,集中分布在白垩系下统三桥组、和尚铺组、李洼峡组中,有明显的层控关系.表明铜矿及伴有益组分由原生沉积加后期改造富集而形成相对稳定的矿（化）体.w（Cu）=0.1%～11%,达到可利用指标.该区有大量的有潜力空白区需要查明,找矿前景较好.望找到新的铜及相应伴生矿床。     

刚果(金)低品位氧化铜回收工艺研究

对刚果(金)某氧化铜堆存矿回收工艺试验研究表明,在样品含铜1.3%左右,且铜氧化率95%以上的情况下,原矿磨矿至-0.074 mm占65%左右,采用高梯度强磁选机磁选-磁选精矿常温酸浸工艺,获得铜品位8%以上、铜回收率74%以上的磁选精矿。磁选精矿采用硫酸常温浸出,在酸矿比0.15的条件下,铜的浸出率达93%以上,磁选抛尾率接近90%,相比原矿直接酸浸的酸矿比0.6,酸耗大幅降低。磁选-酸浸联合工艺,铜的综合收率达68%以上,实现了铜资源的有效回收与利用。     

有底柱分段崩落法转充填采矿法在胡家峪铜矿的应用

胡家峪铜矿的采矿方法主要为有底柱分段崩落法。从成本、技术、经济等角度来说,分段空场嗣后充填采矿法相较于当前的有底柱分段崩落法,具有采切比低、贫化损失指标控制较好、安全性有保证、地压控制简单等优点;相较于上向水平分层充填采矿法,具有采场生产能力强、充填工艺简单、安全等特点。通过对两种充填法进行对比,选出适合于胡家峪铜矿的充填采矿方法,为胡家峪铜矿的绿色、高效开采提供依据。     

大直径深孔阶段矿房采矿方法试验研究与应用

紫金山金铜矿上部为金矿体,下部为隐伏厚大铜矿体,垂向无矿段50m左右。在上部金矿体露天开采的情况下,下部铜矿体同时进行地下开采。地下开采采用平硐-溜井联合开拓系统．为保证金矿与铜矿同时开采的安全,铜矿采用棋盘式框架结构空场采矿法,矿房矿柱分两步骤回采。经过技术与经济论证,一步骤矿房采用阶段矿房采矿法是合理的,于2004年完成试验研究并于2005年年末投产应用。