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1.
铜湿法冶金中的萃取剂   总被引:6,自引:0,他引:6  
介绍国内外铜湿法冶金中萃取剂的研究进展,描述五种羟肟萃取剂的结构、性能及使用情况,比较LIX系列、Acorga系列、前苏联和我国合成的萃取剂的萃取性能,探讨羟肟萃取剂分离Cu/Fe的作用机理,阐述选择萃取剂的原则.  相似文献   

2.
用国产羟肟类萃取N530(2-羟基-4-促辛氧基二苯甲酮肟)除去镍电解液中的铜,在pH4.0,单级萃取,萃取时间3min,除铜率达99.7%,而对Ni^2 萃取极少,Cu/Ni分离系数达10^6以上,萃取剂经再生,10%N530可循环使用4次,20%N530可循环使用7次。  相似文献   

3.
从氨性溶液中萃取分离铜、钴的研究   总被引:8,自引:0,他引:8  
陈永强  邱定蕃  王成彦  尹飞  王忠 《矿冶》2003,12(3):61-63,45
研究了不同萃取剂从氨性溶液中分离铜、钴的过程。采用LIX984N作萃取剂,经一级萃取,溶液中铜的萃取率大于99%;用180g/L硫酸溶液对负载有机相进行反萃,经二级逆流反萃,铜的反萃率达99%以上。采用LIX54-100作萃取剂,经过四级逆流萃取铜的萃取率达到99 53%;用30g/L硫酸溶液对负载有机相进行反萃,经一级反萃,铜的反萃率大于99 9%。在上述萃取过程中,钴均不被萃取。  相似文献   

4.
用国产羟肟类萃取剂N530(2-羟基4-仲辛氧基二苯甲酮肟)除去镍电解液中的铜,在pH4.0,单级萃取,萃取时间3 min,除铜率达99.7%,而对Ni2+萃取极少,Cu/Ni分离系数达106以上萃取剂经再生,10%N530可循环使用4次,20%N530可循环使用7次  相似文献   

5.
文摘与简讯     
《铀矿冶》2006,(3)
用乳化液膜技术从硫酸盐水溶液中萃取铜《Hydrometallurgy》2006年81卷第1期上发表Sengupta B.等人文章,介绍以LIX 984N-C为萃取剂,采用乳化膜(ELMs)技术,从硫酸盐水溶液中萃取铜的研究成果。作者根据粘度和内相液滴大小对乳液作了恰当的表征,并用乳液来研究各种参数对萃取铜的影响。这些参数是:搅拌速度、表面活性剂浓度、萃取连续相pH值、载体浓度、内相反萃取酸度和初始铜浓度。结果表明,LIX984N-C的ELM技术,甚至在低pH值(如pH=1),铜的萃取率也达到80%以上。该ELMs能在很宽溶质(铜)浓度下使用,且几乎具有同样的萃取率。将LIX…  相似文献   

6.
针对现有氯化物体系废蚀刻液中铜难以电解回收利用的现状,本文采用LIX984作为萃取剂,探索其对废蚀刻液中的铜萃取及反萃转型研究,系统考察了萃取剂浓度、料液酸度、萃取时间等对铜萃取的影响,硫酸浓度、反萃时间等对铜反萃的影响,绘制萃取及反萃等温线并模拟多级逆流过程。研究表明:采用LIX984萃取铜时,为确保铜萃取回收率,应将废蚀刻液稀释至Cu浓度接近0.5 mol/L或以下。文中含Cu 131.24 g/L、Cl 231.6 g/L,pH=2.45的废蚀刻液稀释4倍后,可直接采用20 %(体积分数)的LIX984 按相比O/A=4:1,萃取时间10 min,萃取温度25 ℃,经过5级逆流萃取,Cu萃取率为97.1 %,Cl萃取率仅0.05 %。负载铜有机相采用200 g/L的硫酸溶液,按照相比O/A=6:1,反萃时间5 min,反萃温度25 ℃,经过7级逆流反萃,铜反萃率为98.62 %,并得到含Cu 47.16 g/L、Cl 0.18 g/L的硫酸铜反萃液,可直接用于电解回收,得到的金属铜达到国家标准GB/T467-1997 Cu-CATH2要求。  相似文献   

7.
针对现有氯化物体系废蚀刻液中铜难以电解回收利用的现状,采用LIX984作为萃取剂,探索其对废蚀刻液中铜的萃取及反萃转型性能.系统考察了萃取剂浓度、料液酸度、萃取时间等对铜萃取的影响,硫酸浓度、反萃时间等对铜反萃的影响,绘制了萃取及反萃等温线并模拟了多级逆流过程。结果表明,采用LIX984萃取铜时,为确保铜萃取回收率,应将废蚀刻液稀释至铜浓度接近0.5mol/L或以下。铜131.24g/L、氯231.6g/L,pH=2.45的废蚀刻液稀释4倍后,可直接采用20%(体积分数)的LIX984按相比O/A=4/1、萃取时间10min、萃取温度25℃条件进行萃取,经过5级逆流萃取,铜萃取率为97.1%,氯萃取率仅0.05%。负载铜有机相采用200g/L的硫酸溶液,按照相比O/A=6/1、反萃时间5min、反萃温度25℃条件进行萃取,经过7级逆流反萃,铜反萃率为98.62%。得到的含铜47.16g/L、氯0.18g/L硫酸铜反萃液可直接用于电解回收,得到满足GB/T 467—1997中产品Cu-CATH2要求的金属铜。  相似文献   

8.
从环保角度看BK-992铜萃取剂的应用前景   总被引:7,自引:0,他引:7  
马倩玲 《矿冶》2003,12(3):83-85
BK-992铜萃取剂是北京矿冶研究总院"九五"国家科技攻关成果,目前已具有工业化生产规模,并应用于国内氧化铜矿和低品位硫化铜矿的湿法冶炼中。本文从环保角度展望了BK-992萃取剂的应用前景,其中包括①BK-992的生产合成工艺符合节能、降耗、减污的清洁生产工艺;②BK-992的结构与性能同汉高公司的LIX984相似,多年应用表明BK-992无毒,而价格较LIX984便宜1/3;③BK-992用于湿法炼铜工艺,可以有效地提高国内铜矿资源的利用率。因此,BK-992是一种环保型萃取剂,自身生产合成符合我国的产业政策和清洁生产工艺要求,可以替代进口国外产品,具有广阔的应用前景。  相似文献   

9.
美国通用制造公司(General Mills Inc.)出品的LIX类型萃取剂是一种液体离子交换剂。商品名称LIX是Liquid Ion exchangers的缩写。目前,已有编号为LIX-63、LIX-64、LIX-64N、以及近来发展的LIX-70直至LIX-73等一系列萃取剂出现。这些萃取剂对于选择地萃取铜的效果非常  相似文献   

10.
吴小明  沈强华  陈雯 《矿冶》2015,24(4):60-64
本文针对高浓度硝酸-硝酸铜体系,采用LIX984两段萃取回收铜。对影响萃取的主要因素进行优化试验,得出一次萃取最佳试验条件:水相初始pH值为2.0、萃取剂体积浓度为30%、油液相比为2:1、萃取温度为25℃、萃取时间为4min;二次萃取最佳试验条件:水相初始pH值为2.0、萃取剂体积浓度为10%、相比为1:1、萃取温度为25℃、萃取时间为2min,铜的总回收率达到99.5%。该工艺相比于硝酸铜电积、沉淀法和置换法,有流程简单、成本低、铜回收率高且无二次污染等优点。  相似文献   

11.
This paper describes a method, using sulfuric acid and activated charcoal for leaching Polymetallic sea nodules. Resulting leach solutions were examined for the extraction of copper, nickel and cobalt using LIX 984N and ACORGA M5640 in kerosene. After the removal of manganese and iron impurities from the leach liquor, copper and nickel were co-extracted leaving cobalt in the raffinate. The selective stripping of nickel and copper produces solutions rich in these metals, while regenerating the solvent for reuse.  相似文献   

12.
Lix984N对萃取分相和界面乳化的影响   总被引:4,自引:1,他引:3  
研究了铜萃取过程中Lix984N对萃取分相性能和界面乳化行为的影响。当Lix984N体积分数从0.5%,由于有机相密度和粘度增加、表面张力降低,使相分离速度降低。用基团法算出Lix984N的亲水亲油平衡值(HLB)为1.29,根据Bancroft法则,Lix984N有利于W/O型乳化液的稳定。试验结果表明,Lix984N在萃取界面乳化过程中不起主导作用,固体微粒是界面乳化的决定性诱因;随Lix984N体积分数增加,有机相与固体微粒间的亲合力加大,Lix984N与固体微粒有协同乳化作用。  相似文献   

13.
The use of the guanidine extractant, LIX 7950, to extract copper cyanide from waste cyanide solution has been investigated. Copper extraction is favorable at low pH while a high cyanide to copper molar ratio tends to suppress copper loading. The extractant also strongly extracted zinc and nickel from cyanide solution, but the extraction of iron was poor. The presence of thiocyanate ion significantly depressed copper extraction, but thiosulfate ion produced negligible impact on copper extraction. The preferential extraction of metal cyanide species to free cyanide has been noticed. The potential application of the recovery technique as a pre-concentration step for the treatment of cyanide effluent has been suggested, by which copper can be extracted and concentrated into a small volume of solution and the barren cyanide solution recycled to the cyanidation process.  相似文献   

14.
It has been demonstrated in earlier works that zinc as an impurity can be effectively removed from cobalt sulphate solutions (Zn/Co < 1) by solvent extraction with D2EHPA. Some process residues from copper plants contain both cobalt and zinc as valuable metals, which have to be separately extracted for their recovery. Leaching of such residues leads to solutions with higher Zn/Co ratios (Zn/Co > 10). Again, solvent extraction with D2EHPA has been successfully used to separate cobalt and zinc into their respective solutions, which could further be treated by appropriate techniques for the production of these metals.The method mainly consists of selective copper extraction with LIX 984, iron removal by precipitation with CaCO3, simultaneous cobalt and zinc extraction with D2EHPA followed by their separation by selective stripping with sulphuric acid of different concentrations. The use of a specific cobalt extractant is not necessary. More than 95% copper has been recovered from the pregnant solution typically containing 1.0 g/l Co2+, 2.0 g/l Cu2+, 12.60 g/l Zn2+ and 8.4 g/l Fe3+. The cobalt and zinc recoveries were on an average of 90% each in their respective individual solutions.  相似文献   

15.
针对转炉烟尘成分组成,提出利用电解铜废液浸出烟尘制备硫酸铜和硫酸锌的工艺路线。主要考察了电解铜废液用量、浸出温度、浸出时间对烟尘中铜、锌浸出率的影响;获得的浸出液含砷较高,采用加石灰乳沉砷,经过过滤、洗涤,获得含铜、锌溶液;用ZJ988萃取铜,实现铜和锌分离,反萃液和萃余液用浓缩结晶分别获得硫酸铜和硫酸锌产品。该工艺不仅可利用烟尘中的铜和锌,而且利用电解铜废液中的硫酸,实现铜冶炼厂转炉烟尘和电解铜废酸高效综合利用。  相似文献   

16.
从铅冰铜浸出液中萃取分离铜   总被引:2,自引:1,他引:1  
介绍了以铅冰铜特定工艺条件下的氧压浸出液为原料,用ZJ988溶剂萃取分离回收铜的试验研究。考察了不同有机相浓度、相比、混合时间的萃取和反萃效果,并进行了若干多级逆流试验。最终得出采用有机相浓度40%,相比O/A=3/1,五级逆流萃取方式可提取出原液中98.13%的铜。  相似文献   

17.
This paper describes a study of the separation of zinc and copper from the leach liquor generated in the treatment of the zinc residue (29.6 g/L Zn and 37.4 g/L Cu) by liquid–liquid extraction. In it, the influence of the extractant type and concentration, aqueous phase acidity, contact time and stripping agent concentration were investigated. Organophosphorus extractants (D2EHPA, IONQUEST®801 and CYANEX®272) and the chelating extractants (LIX®63, LIX®984N and LIX®612N-LV) were also investigated. The organophosphorus reagents are selective for zinc, while the chelating extractants are selective for copper. In the experiment, D2EHPA was found to be the best extractant. A sulfuric acid solution was used in the stripping study. Five continuous experiments were carried out until an optimal condition for the separation of the metals Zn and Cu was achieved. Experiment 5 was carried out in three extraction steps, three scrubbing stages and five stripping stages. In this experiment, a pregnant strip solution containing 125 g/L Zn and 0.01 g/L Cu was obtained and the concentration of the metals in the raffinate was 28.3 g/L Cu and 0.49 g/L Zn.  相似文献   

18.
针对铜阳极泥氯化浸金液含铜高造成稀贵金属置换困难且损失量大的问题,采用Lix984萃取分离铜,进行萃取槽连续试验,考察铜萃取率变化,分析存在的问题并探讨解决方案。试验发现采用Lix984从含铜10~20g/L和Cl-~200g/L的氯化浸金液中分离和回收铜,技术上可行。在萃取混合时间3min、萃取相比(O/A)2/1、反萃水相为180~260g/L硫酸条件下,经过4级萃取、2级洗涤和2级反萃,铜直收率可达99%以上。金、银、钯、铅、镍等不被萃取,仅有少量夹带,可洗涤回收。萃取过程发生界面污物累积和乳化,主要与料液含固量高、金属离子水解、相比和搅拌速度不当、萃取剂降解等因素有关,可通过精滤、过渡槽调pH值、实时监控流量和转速、定期补充萃取剂和清除第三相等措施,实现萃取稳定运行。  相似文献   

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