从铜老尾矿中综合回收有价元素的研究

针对某堆积老尾矿有价矿物种类繁多、嵌布粒度细,解离困难,含泥高的特性,制定了磨矿擦洗—先硫后氧原则技术方案,通过优化浮选条件及筛选药剂等措施克服不利因素,实现了目的矿物有效回收,实验室试验获得总铜精矿铜品位11.35%、铜回收率为51.42%,并回收了金银等有价元素,该研究为难选堆积铜尾矿综合利用提供了技术支撑。     

从铜老尾矿中综合回收有价元素的研究

针对某堆积老尾矿有价矿物种类繁多、嵌布粒度细,解离困难,含泥高的特性,制定了磨矿擦洗-先硫后氧原则技术方案,通过优化浮选条件及筛选药剂等措施克服不利因素,实现了目的矿物有效回收,实验室试验获得总铜精矿铜品位11.35％、铜回收率为51.42％,并回收了金银等有价元素,该研究为难选堆积铜尾矿综合利用提供了技术支撑.     

应用乙二胺四乙酸二钠促进铝粉从硫代硫酸盐溶液中置换金

在分析硫氰酸盐和硫脲浸金体系氧化剂对置换回收硫氰酸盐金和硫脲金造成负面影响的根源以及克服其负面影响方案的共性特点的基础上,考察了铜离子对铝粉置换金硫代硫酸络离子的影响以及克服其抑制作用的方法。铜离子对铝粉置换金硫代硫酸络离子产生抑制作用的根源在于浸出液中铜离子的存在增加了体系的氧化还原电位。乙二胺四乙酸二钠能克服氧化剂对置换反应的抑制作用,归功于铜乙二胺四乙酸盐螯合物的生成。     

乙二胺四乙酸二钠在硫代硫酸盐溶液金置换中的作用

在分析硫氰酸盐和硫脲浸金体系氧化剂对置换回收金影响的基础上,考察铜离子对硫代硫酸盐体系中铝粉置换金的影响,寻找克服其抑制作用的方法。添加乙二胺四乙酸二钠,与铜离子形成螯合物,能克服二价铜离子对置换反应的抑制作用,显著提高金的回收率。     

铜锌硫化矿浮选分离试验研究

文章简要介绍了江西赣州某硫化矿综合回收铜锌工艺试验研究。采用部分铜快速浮选、铜粗精矿再磨精选、选铜尾矿浮选回收锌的工艺流程处理该矿石,最终获得含铜30.55%,含锌3.91%的铜精矿Ⅰ,含铜26.11%,含锌4.99%的铜精矿Ⅱ,铜综合回收率90.8%;含锌45.20%、含铜2.97%,锌回收率81.57%的锌精矿,从而达到铜锌分离的目的。      

易门铜冶炼渣选铜试验

易门铜冶炼渣成分复杂,铜品位为1.83%,主要铜矿物为硫化铜,占总铜的94.54%。为高效回收其中的铜,进行了选矿试验研究。结果表明,在磨矿细度为-0.045 mm占90%的情况下,采用1粗3精2扫、中矿顺序返回浮选流程处理该试样,可获得铜品位为18.27%、含银76.20g/t、铜回收率为84.86%、银回收率为44.06%的铜精矿。试验确定的选矿工艺流程较简单,不仅对铜有较好的回收效果,而且综合回收了其中的银,是该试样中铜的理想回收工艺。     

某含铜氧化型钼矿选矿试验研究

针对某含铜氧化型钼矿铜低钼高、铜钼氧化率均较高等特点,采用混合浮选-铜钼分离的浮选工艺流程,在回收钼的同时对伴生的超低品位铜进行回收。试验得到钼品位51.95%、回收率为69.47%的钼精矿和铜品位7.43%、回收率58.65%的铜精矿,实现了伴生资源的综合回收利用。     

西藏某铜铁多金属矿石选矿试验研究

西藏某铜铁矿石为矽卡岩型铜铁多金属矿石。矿石中可利用的元素主要为铁、铜,金、银可综合利用。采用先浮选铜后磁选铁的工艺流程,对该矿石进行选矿试验研究,很好地回收了铜、铁,并综合回收了金、银。     

从某冶炼厂水淬铜炉渣浮选回收铜的试验研究

论述了造锍熔炼过程、炉渣冷却方式及冷却速度、炉渣物质组成对炼铜炉渣浮选回收铜的影响,并指出熔融炉渣的冷却方式及冷却速度是影响铜炉渣浮选回收铜的主要因素。以水玻璃为分散剂和抑制剂、丁基黄药和P3为组合捕收剂,对国内某铜冶炼厂水淬铜炉渣中的铜进行浮选回收,在-320目占90%的磨矿细度下,获得了铜精矿铜品位为17.08%,铜回收率为56.98%的试验指标。     

某铜硫铁复杂多金属矿分选新工艺试验研究

某新探明铜硫铁矿石有用矿物为铜矿物、硫矿物和铁矿物,回收矿物种类较多,磁黄铁矿含量较高,矿石性质复杂,为了综合回收该矿石中的铜硫铁矿物,进行了新工艺试验研究。对该矿石进行优先浮选分别回收铜和硫,弱磁选—强磁选回收铁的新工艺试验研究,综合回收铜硫铁,获得铜精矿品位19.53%,回收率38.58%;硫精矿品位43.27%,回收率91.90%;铁精矿品位64.72%,回收率56.60%的较好指标。新工艺试验为该矿石综合回收铜硫铁提供了研究基础。     

Combined bio-hydrometallurgical process for gold recovery from refractory stibnite

The aim of this work concerns the recovery of gold by a combined biometallurgical and hydrometallurgical treatment. The biooxidation of a refractory gold-bearing stibnite (antimony sulphide) favours the increase of gold recovery during the subsequent hydrometallurgical process (cyanidation, adsorption onto activated carbon, desorption from activated carbon and electrowinning).Tests were conducted at laboratory scale utilising a refractory stibnite ore. The gold content of the sample was 32 g/t Au. Bacterial cultures utilised in the biological test consisted predominantly of Thiobacillus genus. After a long leach time (24 hours) low recovery was obtained by direct cyanidation (less than 4% Au), while a gold extraction yield of about 80% was achieved combining biometallurgical and hydrometallurgical process.Experimental results have shown the technical feasibility of the biometallurgical pretreatment prior to the hydrometallurgical process. A complete process flow-sheet has been outlined.     

火法冶炼由高速钢磨屑再生含W-Mo-Cr-V合金

研究用水法预处理和火法回收相结合的工艺从高速钢磨屑中再生含W Mo Cr V的合金,分析原料粒度、还原剂、石灰等对回收率的影响。结果表明,回收工艺可行,W和Mo回收率在96%以上,Cr和V回收率不低于91%。再生合金产品质量稳定,可满足高速钢炼钢使用要求     

湿法冶金建设项目安全风险模糊综合评价

将模糊综合评价法应用到湿法冶金建设项目安全评价研究中,建立了湿法冶金建设项目安全风险模糊综合评价模型,并以某镍、钴湿法冶炼建设项目安全评价为例进行了研究,得到了评价对象安全风险等级和影响因素权重值分布,实现了对评价对象整体性量化评估,也为评价湿法冶金建设项目安全状况和风险程度提供了新的研究方法和思路。     

从铋碲精矿分离回收铋碲的新工艺

对铋碲精矿的处理 ,传统的方法是火法冶炼。采用湿法冶金工艺 ,直接分离并回收铋碲 ,在国内尚未见报道。试验以某地浮选产出的铋碲精矿为原料 ,采用氧化浸出—还原—置换的湿法分离回收工艺 ,获得铋碲产品总回收率分别为 96.93%和 81.70 % ,达到了分离提取的目的 ,为铋碲精矿的分离回收利用提供了新的途径     

一种新型钼矿床中钼的赋存状态及对选矿工艺的影响

贵州西北地区五里平钼多金属矿床矿石性质复杂,矿石中钼的回收指标不理想.利用矿物自动分析技术BPMA、电子探针及化学物相分析等手段对矿石开展了系统的工艺矿物学研究,对钼的赋存状态进行深入分析.结果表明,矿石中的钼有55.60％以独立矿物彩钼铅矿和辉钼矿的形式存在,是选矿过程中需要加强回收的主要目的矿物;同时,还有32.3...     

Aqueous metal recovery techniques from e-scrap: Hydrometallurgy in recycling

Waste of electric-electronic equipment (WEEE) with an annual growth rate of about 3-5% is the fastest growing waste stream in municipal wastes. Notwithstanding their environmental pollution potential, waste of electrical and electronic equipment (WEEE) with their high content of base and precious metals, in particular, are regarded as a potential secondary resource when compared with ores. For the recovery of metals from WEEE, various treatment options based on conventional physical, hydrometallurgical and pyrometallurgical processes are available. These process options with particular reference to hydrometallurgical processes were reviewed in this study. With their relatively low capital cost, reduced environmental impact (e.g. no hazardous gases/dusts), potential for high metal recoveries and suitability for small scale applications, hydrometallurgical processes are promising options for the treatment of WEEE. Since the metals are present in native form and/or as alloys, an oxidative leaching process is required for the effective extraction of base and precious metals of interest. A two-stage process based on oxidative acid leaching of base metals (Cu in particular) followed by leaching of precious metals using cyanide, thiosulfate, thiourea or halide as lixiviant(s) can be suitably developed for the hydrometallurgical treatment of WEEE. However, further research is required to develop new, cost effective and environmentally friendly processes and/or refine existing ones for leaching and, in particular, downstream processes.     

Microwave caustic leaching of electric arc furnace dust

Electric arc furnace (EAF) dust is a waste product which is generated when steel scrap is melted in an electric arc furnace. It contains high concentrations of iron, zinc and lead. Numerous pyrometallurgical and hydrometallurgical processes have been developed to treat this material. Only a limited number of these have reached commercialization and the majority have been pyrometallurgical. However, the hydrometallurgical processes, such as caustic leaching, offer some potential advantages.In the present research, the application of microwave radiation at 2.45 GHz was employed, as the energy source, in the hydrometallurgical caustic leaching process for EAF dust treatment. The variables which were investigated were: leaching time, microwave power, caustic concentration and the solid to liquid ratio. The experimental results showed that the zinc recovery from the dust increased with a decrease in the solid to liquid ratio and an increase in the microwave power. The optimum caustic concentration for the maximum zinc recovery was 8M. The rates of zinc recovery were significantly higher under microwave conditions as compared to those observed with conventional leaching. Some possible mechanisms to explain this behaviour are discussed.     

加压氧化浸出处理硫化砷渣

回顾了一些处理硫化砷渣的湿法冶金工艺，介绍了硫酸铜置换和硫酸高铁浸出工艺。文中详述了北京矿冶研究总院开发的加压氧化浸出处理硫化砷渣的新工艺，给出了工艺参数和试验结果。与其他工艺相比，加压氧化浸出法具有流程短、砷浸出率高、浸出时间短等优点     

ICP-AES法测定铀水冶萃取原液中的钛

利用CL-TBP萃淋树脂分离基体铀,采用ICP-AES法测定铀水冶生产中的萃取原液、母液等一系列硫酸体系中的钛。选用元素最佳分析谱线和仪器合适的工作条件,方法的RSD<10%,回收率在90%～109%之间。该方法快速、简便,满足分析要求。     

水冶系统细碎树脂分离研究

新疆伊宁某铀矿水冶工艺经过10年的生产运行,系统细碎树脂体积比已达到26.93%,严重影响了水冶工艺运行和生产;通过建立细碎树脂分离漂洗塔,有效降低了细碎树脂的含量,提高了树脂的孔隙率,增大了工艺溶液的流量;同时有利于降低贫树脂中的硝酸根含量,有效提高了1R饱和树脂铀容量和水冶回收率。