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中南大学学报(自然科学版)

Journal of Central South University

第43卷    第5期    总第213期    2012年5月

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文章编号:1672-7207(2012)05-1622-06
漂浮阳极泥中铋的提取与三氧化二铋的制备
白猛1,郑雅杰1,洪波1,张博亚2,张传福1

(1. 中南大学 冶金科学与工程学院,湖南 长沙,410083;
2. 云南铜业股份公司冶炼加工总厂,云南 昆明,650102
)

摘 要: 漂浮阳极泥经过盐酸浸出、稀释水解、氢氧化钠中和得到氯氧铋,氯氧铋经过氢氧化钠转化制备得到三氧化二铋。当盐酸浓度为6 mol/L,固液比为1:5,反应温度为80 ℃,反应时间为1 h时,漂浮阳极泥中锑和铋浸出率分别达到99.17%和99.08%。当稀释比为8:1时,盐酸浸出液中锑水解率为98.13%,铋水解率仅为8.8%。稀释后液中加入氢氧化钠溶液,当pH为1.5时,铋水解率达到99.5%,水解产物氯氧铋(BiOCl)中铋、氧、氯的质量分数分别为54.23%,19.30%和14.61%。氯氧铋再次经过盐酸浸出,稀释水解,氢氧化钠沉淀得到氯氧铋。除杂后氯氧铋经过硫酸洗涤、氢氧化钠转化,当氢氧化钠浓度为6 mol/L,液固比为3:1,反应温度为80 ℃时,反应2 h后过滤,用0.5 mol/L盐酸洗涤得到形貌为纤维状、晶型为单斜的α-Bi2O3,氧化铋纯度达到99.81%。

 

关键字: 漂浮阳极泥;浸出;铋;氧化铋

Extraction of bismuth and preparation of bismuth trioxide from floating anode slime
BAI Meng1, ZHENG Ya-jie1, HONG Bo1, ZHANG Bo-ya2, ZHANG Chuan-fu1

1. School of Metallurgy Science and Engineering, Central South University, Changsha 410083, China;
2. Yunnan Copper Company Limited, Kunming 650102, China

Abstract:BiOCl was prepared from floating anode slime by hydrochloric acid leaching, diluting and NaOH neutralizing. BiOCl was turned into Bi2O3 by NaOH. The leaching rates of Sb and Bi are 99.17% and 99.08% when hydrochloric acid concentration is 6mol/L, reaction temperature is 80 ℃, ratio of solid to liquid is 1:5, and reaction time is 1 h. The hydrolysis rate of Sb is 98.13% and the hydrolysis rate of Bi is only 8.8% after the hydrochloric acid leaching when solution is diluted 8 times by water. The hydrolysis rate of Bi is up to 99.5% and the hydrolysis product is BiOCl in which the contents of Bi, O and Cl are respectively 54.23%, 19.30% and 14.61% after the diluted solution was adjusted to pH=1.5 by NaOH. The impurity in the BiOCl is removed after hydrochloric acid leaching, diluting and NaOH neutralizing. BiOCl is washed by sulfuric acid and treated by NaOH after removing impurity. Bi2O3 is prepared when NaOH concentration is 6 mol/L, reaction temperature is 80 ℃, ratio of liquid to solid is 3:1, and reaction time is 2 h. Bi2O3 is monoclinic and fibrous and the purity of Bi2O3 is 99.81% when Bi2O3 is washed by 0.5 mol/L hydrochloric acid.

 

Key words: floating anode slime; leaching; bismuth; Bi2O3

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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