金精矿生物氧化过程中菌体吸附的重要性研究

利用改进装置探索了无菌以及嗜酸性氧化亚铁硫杆菌分别吸附于矿石表面、游离于培养基中等条件下,矿石氧化过程的基本工程学特征。结果表明,菌体吸附氧化时,溶液中的Eh值和矿石的氧化率高于游离菌氧化和无菌氧化;电镜观察可见矿石表面菌体吸附留下的蚀坑;A.ferrooxidans游离氧化时的矿石氧化率大于无菌氧化过程。六偏磷酸钠的加入能改变矿石表面的电性,提高菌体在矿石表面的吸附率。     

某氧化锑矿石的选矿工艺初步试验

<正> 近几年江西地矿局在江西北部发现了若干个锑矿床(点),其中武宁县驼背山大门下锑矿县中型规模,矿体埋藏较浅,矿区交通便利。但是矿石氧化率高达50％.选别较困难。我们对该类型矿石进行了选矿工艺研     

陕西楠木树铅锌矿工艺矿物学研究

陕西楠木树地区氧化铅锌矿资源十分丰富,利用好这部分资源对陕西的铅锌矿产业有极大的现实意义.对陕西楠木树氧化铅锌矿石进行了工艺矿物学研究.利用多种分析检测手段对矿石的化学成分、矿物组成、菱锌矿粒度以及矿石的结构等进行了详细研究.陕西楠木树氧化铅锌矿石中有用矿物以菱锌矿、闪锌矿、方铅矿为主,少量硅锌矿、黄铁矿等.脉石主要为白云石、石英.矿石类型以氧化矿为主,矿石构造较为复杂.为陕西楠木树氧化铅锌矿选矿工艺的选择和开发提供了理论数据.     

铜录山综合回收金银铜铁的合理工艺

一、原矿性质简介铜录山矿床属中、高温热液交代含铜铁矽卡岩型矿床。矿石类型较复杂,有铁矿石、高铜铁矿石、低铜铁矿石、铜铁矿石及铜矿石,其中以铜铁矿石为主,按矿石自然类型又分为氧化矿石、混合矿石和原生矿石。氧化矿石中铁矿物除了磁铁矿外,还有赤铁矿及少量的褐铁矿,铜铁矿石中铁矿物量占     

内蒙古某铜硫矿石选矿试验研究

内蒙古某矽卡岩型高硫含铜矿石Cu品位为0.22%、S品位为9.32%,主要铜矿物为黄铜矿,主要硫矿物为黄铁矿;硫化铜分布率74.63%,氧化铜分布率24.39%;非金属矿物主要有石榴石、透辉石。为了确定该矿石的开发利用工艺,进行了选矿试验研究。结果表明,在磨矿细度为-0.074mm70%的情况下,采用1粗2精2扫浮铜、1粗1精1扫浮硫,铜硫优先浮选流程处理矿石,最终获得Cu品位18.55%、Cu回收率80.34%的铜精矿,S品位52.51%、S回收率56.68%的硫精矿。试验确定的铜硫优先浮选流程结构简单、合理,易于操作,选矿技术经济指标良好,可作为矿石开发利用的依据。     

矿床地质—工艺填图中氧化含铁石英岩的分类问题

克里沃罗格采选公司原料基地的氧化含铁石英岩矿石详细研究,需要对瓦利亚夫金和斯克列瓦特两个矿床进行补充地质勘探工作和矿床地质-工艺填图。矿床地质-工艺填图的主要任务之一是进行矿石的地质-工艺分类。按照一般做法,分类要求划分为工艺类型、亚类和品级。工艺类型包括适合于用一种工艺方法(弱磁选或强磁选联合选矿,焙     

矿床成矿地质特征与矿物分离的关系研究

针对夜长坪钼钨矿选矿厂生产过程中存在的问题,在对矿石类型、成矿期次等矿床成矿地质特征研究基础上,提出了磁选分离工艺,通过干式磁选分离实验和对分离后不同产品的化学组成、矿物组成、氧化率的对比分析研究,发现该工艺实现了85％硫化矿、氧化矿分磨分选,显著解决了矿山无法分采配矿、矿石性质变化造成选矿过程波动等重大难题,稳定了选矿入选原料的性质,取得了较好的选矿指标.同时研究矿石类型、成矿期次等成矿地质特征与矿石分选工艺关系也为解决该类型复杂难选矿提供一种崭新的思路.     

墨西哥La Yesca银多金属矿矿石特征及有用元素赋存状态

矿区位于墨西哥纳亚里特州La Yesca一带,勘查结果表明为一大型蚀变岩型低温热液银锰多金属矿床。对该区矿石成分、结构、构造、蚀变特征及有益元素赋存状态等进行了分析,研究表明:矿石中主要有用元素为锰、银、铅、锌、铜等;组成矿石的金属矿物成分主要有软锰矿、黑锌锰矿、黑锰矿、锰铅矿、褐铁矿等;矿石有益成分为Ag,其次为Mn、Pb、Zn,少量的Cu、Au,矿床平均品位Ag 243.18 g/t,Pb 0.51%,Zn 1.15%,Mn 9.83%,Cu 0.20%,Au 0.18 g/t;矿石自然类型主要为英安岩型块状矿石,以氧化矿石为主,少量混合矿石;矿石工业类型为块状金属硫化物矿石和细脉浸染状矿石,少量的银锰铅锌、锰铅锌、铅锌金属硫化物矿石。     

湖北铜山口铜(钼)矿床矿石品位地质统计学意义

铜山口铜(钼)矿床是鄂东南矿集区内典型的矽卡岩-斑岩复合型矿床.分析矿区内23个钻孔2 041个样品数据,得出矿床矿石品位服从三参数对数正态分布.如果Cu取0.1%为边界品位,仅I号矿体可以新增储量175 486 t.矿体在各个方向都存在块金效应,块金常数大小不均,各方向的变异函数均存在不同程度的空穴效应,得出主矿体垂向变异函数模型,矿体垂向上在12 m以内的关联性较好;另外,变量的离散程度系数C0/C说明了矿体的空间分布的连续性较差.     

新疆塔什库尔干县柯五拉克铅锌多金属矿地质特征与矿床成因探讨

详细描述塔什库尔干县柯五拉克铅锌多金属矿地质特征,矿床围岩热液蚀变明显,主要有绢云母化、绿泥石化、硅化、碳酸盐化和褐铁矿化。故工区内成矿类型推断为热液型。从矿床地质特征、矿石物质成分、矿体的赋存地层等方面探讨矿床成因,矿石类型属氧化矿。     

Recovery of copper powder from copper bleed electrolyte of an Indian copper smelter by electrolysis

Copper bleed solution generated from an Indian Copper smelter contains high amount of copper and nickel along with several impurities. Attempts have been made to develop a new process for the production of pure copper powder from such streams. The purity of the electrolytic copper powder produced from such bleed streams was found to be 99.93%. Properties such as compact density of the annealed copper powder, flow-ability, particle size, etc. were evaluated and were found to be suitable for the powder metallurgical applications.     

铜渣中铁铜回收的试验研究

安徽某铜渣有价金属铜以氧化铜形式存在为主,另含11.45%磁性氧化铁,确定首先磁选回收铁,然后对磁选尾矿浸出、萃取、结晶回收铜。结果表明,在一段磨矿细度为-0.074 mm 80%,磁场强度为234 kA/m,再磨细度为-0.037 mm 90%,磁场强度为93.6 KA/m条件下可获得铁品位61.45%,回收率32.96%的铁精矿,产品达到C60质量标准要求,且大幅降低了铁对后续工艺的干扰;100g磁选尾矿在硫酸用量120 g、双氧水用量20 mL、固液比1:7、温度80℃、搅拌2 h条件下,铜的浸出率达80%,随后浸出液在O/A=1:1,萃取剂含量30%,水相pH值为3,经过3级萃取、反萃和结晶,可获得铜品位24.65%,回收率88.79%的五水硫酸铜,产品纯度高。     

白烟灰浸出液中铜的综合回收

以国内某铜冶炼厂所产白烟灰的浸出液为研究对象,通过硫化沉淀的方法对有价金属铜进行了回收试验。在分析了该白烟灰浸出液主要成分的基础上,重点考察了硫化物加入量、反应时间以及反应温度对金属铜沉淀率的影响,并确定了最佳工艺条件。试验结果表明:当硫铜比为1.2,反应温度为80℃,反应时间为1h时,铜沉淀率可达到98.82%,而砷和锌沉淀率仅为0.08%和0.41%,沉淀渣中铜的含量高达60.4%。     

Hydrometallurgical recovery of copper and cobalt from reduction-roasted copper converter slag

The paper is concerned with a simple hydrometallurgical method for selective recovery of copper and cobalt from industrial copper converter slag. The following consecutive stages are proposed: roasting of the slag in reduction conditions to produce Cu–Co–Fe–Pb alloy, electrolytic dissolution of the alloy in an ammonia–ammonium chloride solution, ammoniacal leaching of the slime, selective copper and cobalt electrowinning. Cu27–Co6–Fe64–Pb1.5 alloy was a five-phase system and did not dissolve uniformly during electrolysis. This resulted in the separation of the metals, wherein iron remained in the slime, while copper and cobalt were components of slime, electrolyte and cathodic deposit. A mechanism of the alloy dissolution was developed. A series of secondary processes took place in the system: precipitation of iron compounds, copper cementation with cobalt and iron; adsorption of copper and cobalt ions on the iron precipitates. Final products were metals of high purity (99.9% Cu, 92% Co).     

Effect of rare earth elements in copper metal and copper alloys

正Copper metal is a major non-ferrous material. It has better electrical and thermal conductivity(next to that of silver) and corrosion resistance than most of the metals. It is easy to be pressed into various electric and heat conductive products or semifinished parts, such as wires, rods, plates, belts and pipes in the devices.Rare earth elements have typical metallic properties and extremely active chemical properties. They can interact with almost all the elements except inert gas,     

炼铜转炉渣中铜铁的选矿研究

叙述了转炉渣的一般特性和影响其可选性的主要因素,介绍了从某铜冶炼厂转炉渣中选别回收铜、铁的试验研究情况,提出浮选中矿与磁性矿合并再磨再选的工艺流程,并就转炉渣选矿的主要特点进行了分析讨论。     

浅论铜矿石地质特征对铜浸出率的影响

文章结合实例,分析探讨了不同的铜矿石地质特征对铜浸出率可能造成的影响,对提高湿法提铜过程中铜的浸出率是有益的.     

Flotation separation of copper sulphides from arsenic minerals at Rosebery copper concentrator

The removal of arsenic bearing minerals from concentrates is becoming more important as environmental laws become ever stricter with regard to smelter emissions. The onus is shifting to concentrate producers to remove these minerals from their product, with penalties applying to materials containing greater than background amounts.The arsenic content of Rosebery copper flotation feed is mainly present as arsenopyrite (FeAsS), containing approximately 46.0% arsenic with the remainder of the arsenic in copper sulphosalts (tennantite (Cu₁₂As₄S₁₃)), in a solid solution series with tetrahedrite (Cu₁₂Sb₄S₁₃). Tennantite contains approximately 20.3% arsenic. Characterisation of the rougher and cleaner concentrates obtained during a plant survey showed that the arsenopyrite was appropriately rejected in the copper flotation circuit. However, tennantite showed similar flotation behaviour to the copper sulphide minerals so that the high arsenic content of the final copper concentrate was mainly in the copper sulphosalts. In this study, regrinding the copper rougher concentrate was investigated to reject tennantite in cleaner flotation. It was found that although finer grinding increased the mass fraction in the ultrafine fraction, the tennantite liberation only increased slightly. The copper selectivity against arsenic was improved significantly although the recovery of copper, silver and arsenic was lower. The difference in floatability of copper sulphide minerals and tennantite appears to increase at finer sizes. In this study, pH and Eh were also manipulated to further improve the selectivity of copper flotation against tennantite at fine particle sizes with some promise. In order to find an application in the Rosebery circuit, any changes must have a net economic benefit and the trade-offs and implications are discussed in this paper.     

某铜矿山浮选尾矿中铜硫回收工艺技术

我国西南部某特大型铜矿山浮选尾矿中铜品位0.21%,硫品位2.10%,含金0.11g/t。该矿石中目的矿物嵌布粒度细,与脉石矿物嵌布关系复杂,另外,因该矿山建设投产较早,受限于当时选矿技术水平相对较低,选矿指标不理想,有较多的铜损失在尾矿中。随着国家经济发展对资源需求量的逐步提高,针对老尾矿开展资源回收再利用,实现有价资源的应收尽收,具有重要的实践意义。因此,本文针对该尾矿开展了详细的选矿试验研究,通过工艺及药剂制度的研究,开发了高效捕收剂BKL-1,采用“铜硫依次优先浮选”的工艺流程,实验室闭路试验获得了铜品位20.11%,含金3.11g/t,铜回收率81.63%、金回收率25.39%的铜精矿及硫品位42.15%、硫回收率81.18%的硫精矿,在减少尾矿排放的同时,进一步实现了有用资源的综合回收。