硫酸在铀工业中的应用

金属加工是继化肥工业之后的第二大硫酸需求领域。大部分的硫酸用于铜矿的浸出和后续的溶剂萃取一电积（SX／EW），特别是在智利。在未来十年内，镍矿的高压酸浸（HPAL）所消费的硫酸预计将达到甚至超过铜矿。然而，还有其他一些金属工业也需要使用硫酸，近年来增长迅速的铀矿浸出就是其中之一。     

低品位铜矿微生物浸出的生产实践

为了充分利用低品位铜矿,大树硫铁矿采用微生物浸出的工艺在小规模的工业生产中获得了铜的浸出率达85％的指标,为有效地利用低品位铜矿和大规模工业生产创造了条件。     

低品位铜矿提铜的试验研究

研究了新疆省某铜矿湿法提铜工艺,采用"破碎-酸浸"生产铜,介绍了酸度、浸出时间、浸出温度对试验结果的影响。并进行了扩大试验。试验结果表明,该铜矿酸浸提铜工艺的最佳条件是:酸用量18.3%,浸出时间3 h,温度90℃,矿样中铜浸出率达70%~78%。该工艺简便,废气、液排出量少,对环境基本无污染,有较好的经济效益。     

硫化铜矿湿法冶金工艺综述

讨论了硫化铜矿湿法冶金反应机理、工艺流程,比较了各浸出和电积工艺的特点.对硫化铜矿湿法冶金的发展进行了综述.     

用FeCl_3从复杂铋矿中浸出金属铋

从品位低、组成复杂、伴生钼、铜矿物的复杂铋矿石中浸出金属铋,采用常规搅拌浸出法在常温常压下进行浸出,讨论了酸度、FeCl3用量、浸出时间、浸出剂用量等对铋浸出率的影响。实验结果表明:用FeCl3浸出金属铋,铋的浸出率可达95%以上。     

低品位铜矿中提取铜工艺条件的研究

研究硝酸、硫酸混酸浸取低品位铜矿,探求低品位铜矿中提取铜最佳工艺条件。结果表明:液固比为4∶1,硫酸浓度50g/L,硝酸浓度150g/L,反应温度80℃,反应时间8小时。在此浸出条件下,铜的浸出率可达96.8%。     

混合铜矿的高压氨浸工艺

对新疆某地混合铜矿采用高压氨浸工艺, 考了NH3·H2O浓度、NH4+盐用量、氧压、浸出温度、浸出时间及固液比等因素对浸出过程的影响. 结果表明, 在适宜的工艺条件下,铜浸出率可达98%以上.     

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.     

铜矿石制备硫酸铜工艺研究进展

概述了目前国内外利用铜矿石生产硫酸铜的方法及特点,提出了细菌浸出－ 萃取生产硫酸铜的新方法     

内蒙古白乃庙硫化铜矿反应器细菌浸出研究

通过对内蒙古白乃庙硫化铜矿的细菌氧化反应器试验 ,探索了通入CO2 及搅拌转速对细菌浸铜的影响。结果表明 :随着搅拌转速的提高 ,铜的浸出率呈明显的增长趋势 ;在一定时间内通入CO2矿样的铜浸出率要高于不通入CO2 的铜浸出率     

铜冶炼阳极炉浇铸渣制取饲料级硫酸铜

采用铜冶炼过程铜阳极板浇铸渣制取饲料级硫酸铜，经试验，铜浸出率为９４．５６％ ，浸出液经一次结晶，硫酸铜质量达国标ＧＢ８２４９—５７ 要求，再经二次处理，达到美国客户饲料级要求。     

空气氧化分步浸出海绵铜制备硫酸铜

用空气氧化、催化、氨—碳铵分步浸出海绵铜的工艺来制备纯度较高的硫酸铜     

化学法处理铜合金屑工艺的热力学和动力学分析

本文对化学法处理普通黄铜屑，直接制备纯铜粉末进行了热力学和动力学分析研究及试验表明：Zn，Fe等元素的酸浸反应容易进行，氧化及还原速度快．酸浸过程受扩散控制，其动力学方程为进一步的热力学分析指出，本工艺适合于处理各种铜合金尾料，尤其适合于黄铜类铜合金尾料。     

OPTIMIZATION OF LEACHING OF COPPER FROM OXIDIZED COPPER ORE IN NH3-(NH4)2SO4 MEDIUM

Studies were carried out for selective leaching of Cu with simultaneous avoidance of iron dissolution during leaching of oxidized copper ore in an aqueous NH₃-(NH₄)₂SO₄ system. The effects of leaching parameters, such as ammonia concentration, ammonium sulphate concentration, leaching time, and solid-to-liquid ratio, were investigated on leaching of copper. A 2ⁿ factorial experimental design method in the dissolution experiments was used. In addition, the “Steepest Ascent” method was also applied to determine the optimum leaching conditions. It was observed that the most effective parameters on the leaching of copper were ammonia concentration and leaching time. Only 0.17% of iron in ore was dissolved in ammonia and ammonium sulphate medium. The optimum conditions established for maximum copper recovery were: ammonia concentration 2.824 mol L^-1, ammonium sulphate concentration 0.236 mol L^-1, solid-to-liquid ratio 0.167 g mL^-1, leaching time 2 h. Fixed parameters chosen in the experiments were: room temperature, average particle size 2.8 mm, stirring speed 500 rpm. Under the optimum conditions established for maximum copper recovery, the percentage of leached copper was 98.87.     

OPTIMIZATION OF LEACHING OF COPPER FROM OXIDIZED COPPER ORE IN NH3-(NH4)2SO4 MEDIUM

Studies were carried out for selective leaching of Cu with simultaneous avoidance of iron dissolution during leaching of oxidized copper ore in an aqueous NH₃-(NH₄)₂SO₄ system. The effects of leaching parameters, such as ammonia concentration, ammonium sulphate concentration, leaching time, and solid-to-liquid ratio, were investigated on leaching of copper. A 2ⁿ factorial experimental design method in the dissolution experiments was used. In addition, the “Steepest Ascent” method was also applied to determine the optimum leaching conditions. It was observed that the most effective parameters on the leaching of copper were ammonia concentration and leaching time. Only 0.17% of iron in ore was dissolved in ammonia and ammonium sulphate medium. The optimum conditions established for maximum copper recovery were: ammonia concentration 2.824 mol L^?1, ammonium sulphate concentration 0.236 mol L^?1, solid-to-liquid ratio 0.167 g mL^?1, leaching time 2 h. Fixed parameters chosen in the experiments were: room temperature, average particle size 2.8 mm, stirring speed 500 rpm. Under the optimum conditions established for maximum copper recovery, the percentage of leached copper was 98.87.     

焙烧酸浸渣中铜的形态对铜、金浸出率的影响

以某黄金冶炼厂含铜金精矿为研究对象,采用铜化学物相分析及浸出方法研究了焙烧?酸浸?氰化工艺处理含铜金精矿过程中焙烧酸浸渣中铜形态对铜、金浸出率的影响. 结果表明,含铜金精矿焙烧酸浸及氰化浸出时,铜形态对铜、金浸出率有显著影响,当酸浸渣中氰化易溶铜(氧化铜、次生硫化铜)含量大于0.10%时,金浸出率降低. 以原生硫化铜矿为主的含铜金精矿,适当提高焙烧温度、延长焙烧时间、增加初始酸浸酸度可有效降低酸浸渣中氰化易溶铜含量,提高铜浸出率,减弱其对金浸出率的影响.     

评述湿法冶铜工艺

评述了硫化铜矿、氧化铜矿和自然铜矿的湿法冶炼途径。指出，焙烧后酸浸仍是处理硫化铜矿最现实而有效的工艺；（细菌）浸取—萃取—电积法是处理低品位铜矿最具发展前途的工艺，但受到一些条件限制     

DEVELOPMENT OF RANEY-TYPE LOW TEMPERATURE METHANOL SYNTHESIS CATALYSTS†

Catalysts prepared by caustic leaching of Cu—Zn—Al alloys are shown to have activities greater than those of a commercial copper-based catalyst.

Complete leaching of alloys containing 50 wt.% aluminium, with between 0 and 50 wt.% copper, and the balance zinc produced catalysts having a wide range of activities. The most active catalysts for methanol production were produced from alloys containing from 10 to 20 wt.% zinc.

The activities of catalysts prepared by the partial leaching of an alloy containing approximately 36% copper, 15% zinc and 48% aluminium were shown to pass through a maximum at a leaching time of 2.75 hours. This catalyst had more than double the activity of a commercial catalyst al reaction conditions similar to those employed industrially.     

DEVELOPMENT OF RANEY-TYPE LOW TEMPERATURE METHANOL SYNTHESIS CATALYSTS†

Catalysts prepared by caustic leaching of Cu—Zn—Al alloys are shown to have activities greater than those of a commercial copper-based catalyst.

Complete leaching of alloys containing 50 wt.% aluminium, with between 0 and 50 wt.% copper, and the balance zinc produced catalysts having a wide range of activities. The most active catalysts for methanol production were produced from alloys containing from 10 to 20 wt.% zinc.

The activities of catalysts prepared by the partial leaching of an alloy containing approximately 36% copper, 15% zinc and 48% aluminium were shown to pass through a maximum at a leaching time of 2.75 hours. This catalyst had more than double the activity of a commercial catalyst al reaction conditions similar to those employed industrially.     

高碱性铜尾矿的黑曲霉生物浸出

以湖南某高碱性铜尾矿为研究对象,进行了黑曲霉摇瓶浸出实验,研究了浸出时间和PSA培养基成分、含量对铜浸出的影响. 结果表明,浸出时间为7 d时,铜浸出率最高,随浸出时间延长,铜浸出率显著下降. PSA培养基中的马铃薯和蔗糖含量对铜浸出有明显影响,马铃薯含量为200 g/L、蔗糖含量为20 g/L时,铜浸出率最高. 在接种量0.02%(j)、矿浆浓度50 g/L、温度30℃、转速200 r/min、浸出时间7 d、马铃薯和蔗糖含量分别为200 g/L和20 g/L条件下,铜浸出率可达79.03%.