浮选-浸出处理土耳其氧化铜矿工艺

采用浮选-浸出处理含铜2.09%的土耳其氧化铜矿,该矿有用矿物主要为孔雀石、蓝铜矿、硅孔雀石及少量硫化铜,铜矿物氧化率高,嵌布粒度较细,矿石易泥化. 通过浮选回收易浮的硫化铜和部分孔雀石和少量蓝铜矿,获得品位25.04%、回收率为57.25%的浮选铜精矿,浮选尾矿中的蓝铜矿和硅孔雀石采用硫酸浸出,含铜量由0.94%降至0.05%,浸出率达94.68%,实现了目的矿物的有效回收.     

磷酸乙二胺对硅孔雀石浮选的影响

以硅孔雀石单矿物为研究对象,通过单矿物浮选试验、溶解试验、硫残余量试验及SEM-EDS分析研究了磷酸乙二胺对硅孔雀石浮游特性的影响及其作用机理.浮选试验结果表明适量的磷酸乙二胺对硅孔雀石浮选效果很好.通过SEM-EDS分析结果表明磷酸乙二胺在硅孔雀石表面并未发生吸附,其作用类似于"催化剂",为后续硫化钠对硅孔雀石表面的硫化提供了更具有反应活性的矿物表面.而磷酸乙二胺对硅孔雀石的抑制作用发生在溶液中,而非硅孔雀石表面.     

高分子药剂对硅孔雀石表面疏水性改性浮选影响试验研究

针对硅孔雀石天然可浮性差,表面多孔和高孔隙度,性质变化不均匀,并且亲水性强,难溶解的特性,通过XRD、SEM检测硅孔雀石原矿性质和表面形态,核心地提出了硅孔雀石改性高分子聚合物吸附-中间金属铜离子联接-捕收剂吸附的试验方案.高分子活化剂通过对硅孔雀石表面有机改性,使其能够吸中间金属铜离子,在硅孔雀石浮选改性中起着至关重要的作用.通过硫酸铵、乙二胺磷酸盐、高分子药剂实际浮选试验情况分析对比,发现高分子药剂和硫酸铵共同使用时试验效果最好,最终硅孔雀石的回收率达到了86.9％的良好指标.     

由孔雀石制备碱式硫酸铜的研究

用孔雀石制铜盐,虽然有人做过研究,但因我国铜矿资源分布较广且品位和组成悬殊亦大,而且所需制备的铜盐亦不相同,任何一法难能尽善尽美。我们对孔雀石制备碱式硫酸铜进行了试验研究,完成了实验室小试工作。     

铜硫浮选分离技术与药剂研究进展

硫化铜矿的选别工艺以浮选为主,黄铜矿与黄铁矿可浮性相似是二者难以分离的根本原因。总结了硫化铜矿浮选分离技术的研究现状,介绍了优先浮铜工艺、铜硫混浮-再磨-铜硫分离工艺、分支串流浮选工艺、等可浮工艺和部分优先-混合浮选工艺的特点,综述了硫化铜矿捕收剂和黄铁矿抑制剂的分类及优缺点,并展望了铜硫浮选分离技术与药剂的发展方向。     

反射炉炼铜渣回收铜技术探索

在铜熔炼反射炉渣中铜铁赋存状态分析基础上,采用常规选矿和火法贫化工艺对反射炉水淬渣进行回收铜技术探索.研究结果表明,水淬渣含1.06%铜和36.41%铁,铜、铁、硅矿物紧密共生,相互交织,铜矿物的结晶粒度多数低于5 μm,在Na2S用量800 g/t、混合捕收剂用量240 g/t、浮选时间6 min、磨矿细度95%为-0.074 mm矿浆浓度30%的浮选条件下,渣精矿品位4.54%,回收率达64.65%,常规选矿工艺难奏效.吹炼转炉渣返回贫化作业会导致反射炉渣含铜较高,添加一定量黄铁矿精矿,采用热渣排放方式能有效降低渣含铜.     

某难处理氧化铜矿酸浸实验及动力学分析

针对以硅孔雀石为主的高结合率、高钙镁难处理铜矿的进行了酸浸动力学研究,考察了温度、硫酸浓度、搅拌强度和矿石粒径对铜浸出率的影响.结果表明:铜浸出率随温度和硫酸浓度的增大而提升,搅拌强度对铜浸出率影响较小,铜浸出率随矿石粒径的减小先增大后减小,这可能是由于原矿钙镁含量高,当磨矿细度过细钙镁充分解离,一旦矿石和硫酸接触,钙镁和硫酸迅速反应消耗大量的酸,导致铜的浸出率降低.采用SEM-EDS和XRD对浸出前后矿样进行表征,结果表明碳酸钙与硫酸反应生成硫酸钙沉积在颗粒表面形成固态产物层,阻碍浸出反应.动力学分析表明该浸出过程受固态产物层扩散控制,反应表观活化能为11.43 kJ/mol.     

硫化铜矿石浮选捕收剂的最新研究进展

对硫化铜矿石浮选捕收剂进行了分类并进行了系统的分析与归纳,综述了硫化铜矿石浮选捕收剂的制度和浮选工艺。指出开发新型高效无毒的捕收剂是硫化铜矿石浮选研究的重点和发展方向,采用低碱度铜硫分离工艺和应用组合捕收剂浮选可提高硫化铜矿石的浮选性能和效果。     

硫化铜矿石浮选捕收剂的最新研究进展

对硫化铜矿石浮选捕收剂进行了分类并进行了系统的分析与归纳,综述了硫化铜矿石浮选捕收剂的制度和浮选工艺。指出开发新型高效无毒的捕收剂是硫化铜矿石浮选研究的重点和发展方向,采用低碱度铜硫分离工艺和应用组合捕收剂浮选可提高硫化铜矿石的浮选性能和效果。     

自然铜矿石中铜的化学物相分析

本文制定了含自然铜矿石的加工粉碎流程。考查了若干浸出剂对自然铜、硅孔雀石、孔雀石和辉铜矿的分相效果；并建立了测定它们的化学物相分析方法。     

Leaching kinetics of copper flotation tailings in aqueous ammonia/ammonium carbonate solution

The experiments of agitation leaching were carried out in aqueous ammonia/ammonium carbonate solution, to recover copper from the flotation tailings of waste copper oxide residue. The main copper minerals contained in the flotation tailings are chrysocolla, malachite, and cuprite, with the copper grade of 1.12%. Effects of lixiviant concentration, solid‐to‐liquid ratio, stirring speed, and reaction temperature on copper leaching ratios at various time were investigated. It is found that the leaching ratio almost cannot be affected by time after 90 min of leaching. The optimised processing conditions have been determined, under which the leaching ratio of 70.6% is obtained. Kinetics analysis indicates that the copper leaching ratio is controlled by diffusion through the product layer in the initial 60 min of leaching, and corresponding measures to strengthen the copper extraction is proposed, with the activation energy of 32.3 kJ/mol. © 2012 Canadian Society for Chemical Engineering     

晶体化学在氧化铜矿物浮选中的应用研究进展

晶体化学是矿物分选的重要理论基础之一,在矿物浮选领域中发挥着重要作用. 本工作总结了晶体化学的研究内容及其在氧化铜矿物浮选中的应用,介绍了氧化铜矿物晶体结构特征、表面特性及可浮性研究现状,综述了晶体化学在氧化铜矿物浮选药剂作用机理研究及浮选条件控制等方面的应用,指出了晶体化学在矿物浮选中的应用研究方向.     

羟肟酸的合成方法及其在浮选中的应用

介绍了羟肟酸的各种合成方法,以羟胺一脂肪酸酯法和羟胺一酰氯法为主。国内外研究实践表明：羟肟酸是一种选择性和捕收性能良好的矿物捕收剂,可用于浮选氟碳铈矿、铁矿、钨矿、锡石和铌钽矿等多种矿物。最后针对羟肟酸的研究及应用现状提出了几点建议。     

某铜矿选矿实验研究

为了开发某铜矿资源,对其进行了可行性实验研究.根据矿石物相分析结果,采用硫化铜与氧化铜混合浮选工艺,并选用新型高效浮选药剂,可获得铜精品位20.29%,收率70.68%的铜精矿.     

Copper Silicates in the Timna' ORE Deposit

Timna' chrysocolla was divided into several types based on two end members differing in water content, specific gravity, CuO:SiO₂ ratio and apparently also in their DTA behaviour. The chrysocolla replaces quartz. In places an intergrowth of chrysocolla and wilkeite was observed by electron probe scanning. The X-ray diffraction pattern of chrysocolla is rather poor; however diffraction patterns were obtained after controlled heating (DTA). These indicated the crystallization of tenorite, cuprite, quartz and cristobalite. Dioptase, plancheite and bisbeeite were also identified by X-ray diffraction. Several possibilities of chrysocolla genesis are discussed.     

响应曲面法优化氧化铜渣浮选提铜工艺

江西某炼铜炉渣含铜量高,具有较高的经济价值。由于该铜渣中铜矿物以氧化矿为主,且硫化矿表面被氧化,直接浮选铜回收率低、经济效益差。通过添加活化剂,活化氧化铜矿物,并利用响应曲面中心复合设计原理对浮选工艺条件进行优化,研究氧化钙、硫化钠、Z-200对浮选效果的响应。结果表明,Z-200用量是影响精矿品位和回收率的主要因素,且各响应因素间存在交互效应,在CaO用量为25 g/t,Na₂S用量为500 g/t,Z-200用量为100 g/t的最优条件下,闭路试验获得精矿平均品位12%,精矿铜回收率为86.57%,采用该浮选优化工艺能获得较好的回收效果。     

Chrysocolla as a Methanation Catalyst Support

The kinetic properties of nickel supported on chrysocolla (CHR) and nickel—copper mixtures supported on silica were measured by steady-state kinetics (carbon monoxide hydrogenation), temperature-programmed desorption (carbon monoxide, hydrogen), and temperature-programmed reaction (carbon monoxide and carbon hydrogenation). Leached chrysocolla, a silica-like material containing 7.1% copper, is shown to be an effective catalyst support; NI/CHR has methanation activity and adsorption properties (hydrogen, carbon monoxide) that are similar to Ni/SiO₂. The Ni/CHR catalyst has a much higher selectivity to methane formation, however, and a lower activation energy. The copper in the CHR support does not appear to affect the catalyst properties and thus apparently does not interact with the nickel. Copper in CuNi catalysts decreases the turnover number for methanation, the amount of hydrogen adsorption, the strength of hydrogen binding to the surface, and the rate of carbon monoxide disproportionation. Copper also increases higher hydrocarbon selectivity at higher temperature, though the temperature at which this occurs depends significantly on the support. The rate of carbon hydrogenation, however, is relatively independent of the presence of copper. Good agreement was obtained between carbon monoxide hydrogenation kinetics measured by steady-state reaction and by temperature-programmed reaction.     

Continuous Precipitate Flotation of CuS/ZnS

Abstract

The precipitate flotation of copper and zinc as sulfides in dilute aqueous solutions (50-250 ppm metal ion concentration) was investigated in the laboratory in continuous flow. The dispersed-air flotation technique was followed, leading to a selective recovery of copper sulfide of the order of 95% in a high acidic pH region (of 1.7) by a laurylamine ethanolic solution as collector and with the addition of cetyl-pyridinium chloride as frother. The precipitate flotation of zinc sulfide was then accomplished with the same method at pH 5.0 as a second separation stage (in the presence of minor amounts of copper).     

采用优先浮选工艺提高铜金浮选指标

针对利国铁矿铜金选厂铜精矿回收率偏低的生产情况,在借鉴同类矿山成功经验和选矿试验基础上,对该选厂进行了浮选工艺和浮选药剂的技术改造,改造后钢精矿品位提高3.31%,回收率提高5.17%,黄金回收率提高4.15%.