对硫酸镍电解液的萃取净化除杂进行了系统的研究.实验采用M5640对铜离子进行除杂,实验条件为:pH值为3.0,相比为1:1,萃取剂体积浓度为15%,振荡时间5 min,在此实验条件下铜离子的萃取率大于99.83%,其含量小于0.1 mg·L~(-1),已达到5N镍电解液标准.去除铜离子之后,采用P507对电解液进行除杂,在实验条件pH为4.0,相比为1:1,萃取剂体积浓度为15%,振荡时间5 min下,二价铁离子、锌离子、铅离子的萃取率分别为:99.93%,99.75%,84.01%,其含量分别为:<0.10,0.21,0.30 mg·L~(-1),已达到5N镍电解液标准.在此之后再采用P507对电解液中钴离子进行去除,实验条件为:用氢氧化钠溶液均相制皂75%,提高待萃液当中钴离子的含量至4.19 g·L~(-1),即Co/Ni为1/10.实验采取四级萃取,控制水相pH值在4~5之间.钴离子萃取率为74.92%,含量为14.88 mg·L~(-1),已达到5N镍电解液标准.
The extraction of nickel sulphate electrolyte was studied. M5640 was used to remove Cu~(2+). The extraction rate was higher than 99.83% and the content of Cu~(2+) was lower than 0.1 mg·L~(-1) according to the experiment conditions. And the conditions were as follows: pH was 3.0, O/A was 1: 1, the volume concentration of M5640 was 15%, and the reaction time was 2 min. After Cu~(2+) was removed, P507 was used to remove other impurities, such as Fe~(2+) , Zn~(2+), Pb~(2+). The contents of these impurities were removed lower than 0. 10, 0.21 and O. 30 mg·L~(-1) respectively. The conditions were as follows: pH was 4.0, O/A was 1: 1, and the reaction time was 5 rain. Then P507 was also used to remove Co~(2+). The conditions were as follows: firstly P507 was 75% saponifieated by sodium hydroxide solution. Secondly the content of Co~(2+) was increased to 4.19 g·L~(-1)( Co/Ni was 1/10). Thirdly pH was controlled between 4 and 5. After four times extraction the content of Co~(2+) was reduced to 14.88 mg·L~(-1), and the extraction rate of Co~(2+)was 74.92%. Its content was qualified to the standard of 5N nickel sulphate electrolyte.
参考文献
[1] | Dniz C M.镍火法冶金生产综述[J].有色冶炼,1992(05):1. |
[2] | 蒙延双,朱福良,张峰,冯耀华.镍电解液用P204萃取除铜[J].有色金属(冶炼部分),2007(06):7-9. |
[3] | 郭华军,王晓琼,李新海,张新明,王志兴,彭文杰,许声飞.BK992萃取除铜净化硫酸镍钴溶液[J].中国有色金属学报,2005(05):806-812. |
[4] | Parija C;Sarma P;Bhaskara V R .Separation of nickel and copper from ammoniaeal solutions through co-extraction and selecfive stripping using LIX84 as the extractant[J].HYDROMETALLURGY,2000,54(02):95. |
[5] | 周学玺,汪焕庆,夏云龙,朱屯.用季铵盐萃取分离钴铁锰[J].中国有色金属学报,2000(05):723. |
[6] | 刘久苗,谈定生,江建军,周邦娜.用P507从硫酸镍溶液中萃取分离钙镁的研究[J].上海有色金属,2002(04):149-152. |
[7] | 刘兴芝;薛红 .烷基硫代钴的性能及钴镍分离研究[J].稀有金属,1997,21(05):342. |
[8] | 酸性磷型萃取剂的结构与其萃取钴(Ⅱ)和镍(Ⅱ)性能的关系[J].中国有色金属学报,1999(01):139. |
[9] | 何焕华.世界镍工业现状及发展趋势[J].有色冶炼,2001(06):1-3. |
[10] | 杜喜霞,安兴才,蒲瑜,王应平.微孔复合隔膜在镍电解中的实验研究[J].稀有金属,2008(01):54-58. |
[11] | Filiza M;Sayarb N A;Sayard A A .Extraction of cobalt(Ⅱ)from anqueous hydrochloric acid solutions into alamine 336-m-xylene mixtures[J].Hydrometallurgy,2006,81:167. |
[12] | Liu Daxing;Ru Ruixing;Zhang Ruihui;Wang Tao.Separation of cobalt from nickel in sulfate solutions by solvent extraction with P507[A].,1985:2. |
[13] | Sarangi K;Reddy B R;Bas R P .Separation of Co(Ⅱ)/Ni(Ⅱ) by the sodium salts of D2EHPA,PC 88A and cyanex 272 and their mixtures[J].Hydrometallursy,1999,52:253. |
[14] | 彭荣秋.镍冶金[M].长沙:中南大学出版社,2005:126. |
[15] | 朱屯.萃取与离子交换[M].北京:冶金工业出版社,2005:286. |
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