以焙烧—湿法工艺从含金废料中回收金

针对紫金矿业集团黄金冶炼厂产出的含金废粒,进行了焙烧－湿法回收金的工艺研究。含金废料经焙烧去除炭质和有机物后,经氰化浸出、炭吸附回收金,金回收率可达90％以上,该工艺成本低,易实施,可获得良好的经济效益。     

从工业铝酸钠溶液中湿法除硫工艺研究

介绍了用铝酸钡从工业铝酸钠溶液中湿法除硫的试验结果,详细考察了时间、温度、铝酸钡添加量对除硫效果的影响,试验结果为工业生产提供了较完整的试验数据。     

Homogeneous Liquid–Liquid Extraction of Rare Earths with the Betaine—Betainium Bis(trifluoromethylsulfonyl)imide Ionic Liquid System

Several fundamental extraction parameters such as the kinetics and loading were studied for a new type of metal solvent extraction system with ionic liquids. The binary mixture of the ionic liquid betainium bis(trifluoromethylsulfonyl)imide and water shows thermomorphic behavior with an upper critical solution temperature (UCST), which can be used to avoid the slower mass transfer due to the generally higher viscosity of ionic liquids. A less viscous homogeneous phase and mixing on a molecular scale are obtained when the mixture is heated up above 55 °C. The influence of the temperature, the heating and cooling times, were studied for the extraction of neodymium(III) with betaine. A plausible and equal extraction mechanism is proposed in bis(trifluoromethylsulfonyl)imide, nitrate, and chloride media. After stripping of the metals from the ionic liquid phase, a higher recovery of the ionic liquid was obtained by salting-out of the ionic liquid fraction lost by dissolution in the aqueous phase. The change of the upper critical solution temperature by the addition of HCl or betaine was investigated. In addition, the viscosity was measured below and above the UCST as a function of the temperature.     

湿法分离含锌物料中砷的工艺述评

本文对近年来含锌物料中砷的湿法分离工艺研究进行了简要回顾，重点评价了几种典型方法，并对此技术的进一步发展提出了建议．     

湿法炼锌低酸浸出改预中和后的操作探讨

湿法炼锌低酸浸出改为预中和后 ,可使矾渣含锌由大于 7%降至 6%以下 ,根据湿法炼锌工艺及设备实际生产能力 ,通过冶金计算 ,提出了预中和技术改造后应作的操作调整 ,从而指导整个生产流程建立新的平衡 ,以获得技改预期的经济效益     

湿法炼锌浸出工序的工艺改进

介绍了葫芦岛锌厂第一冶炼厂浸出工序的工艺改进过程，通过对加料系统工艺流程、浸出槽排列纵向位置的改进，解决其投料困难，跑、冒、滴、漏严重，设备故障率高等问题。提高了劳动生产率，降低了劳动强度，改善了劳动环境。     

NH4SCN从ROH-CTMAB-C12H26载金有机相中反萃金

研究了硫氰酸铵（NH4SCN）从混合醇（ROH）－十六烷基三甲基溴化铵（CTMAB）－正十二烷（C12H26）载金有机相中反萃金，考察了平衡时间，PH值，反萃剂浓度，温度等因素对反萃率的影响及有机相的循环使用，绘制了反萃等温曲线，结果表明，NH4SCN对金具有较高反萃率，可顺利实现金的反萃。     

水氯镁石和高钙菱镁石制备氢氧化镁

氢氧化镁是一种应用广泛的新型绿色环保材料,如何低成本制备高品质氢氧化镁引起广泛关注。以水氯镁石和高钙菱镁石为原料,采用湿法冶金工艺制取氢氧化镁,探讨反应时间、反应温度、水氯镁石浓度、煅烧后物料的粒度等对氢氧化镁纯度的影响。结果表明,在80℃恒温水浴、反应时间6 h、水氯镁石浓度5%、煅后菱镁石粒度-45μm条件下得到的氢氧化镁沉淀纯度可达94.89%,主要物相为Mg(OH)₂和CaO。     

湿法炼锌制镉碱渣综合回收实践

采用高温高酸氧化浸出工艺对湿法炼锌粗镉生产过程产出的制镉碱渣进行处理。通过“电解液+锰粉氧化浸出”与“电解液直接浸出”制镉碱渣小试工艺试验对比,获得高温高酸氧化浸出的工艺参数为：浸出温度85~90 ℃、浸出时间8 h以上、液固质量比~4 g/g,锌、镉高温高酸氧化浸出率分别达到96.88%、95.35%。通过工业化实践,将某锌冶炼厂长期堆存的制镉碱渣有效处理,实现锌、镉等有价金属的回收,提高金属回收率,同时避免含隔渣长期堆存带来的环保风险,具有较好的经济和环境效益。     

银阳极泥氯化浸出回收金工艺研究

研究了银阳极泥氯化浸出回收金工艺。实验结果显示,在盐酸1.5 mol/L、硫酸0.75 mol/L、氯化钠35 g/L、氯酸钠与银阳极泥中金的质量比mNaClO