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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第12期    总第256期    2015年12月

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文章编号:1672-7207(2015)12-4398-06
含硫铝酸钠溶液中铁质量浓度的变化规律
牛飞,李小斌,周秋生,齐天贵,刘桂华,彭志宏

(中南大学冶金与环境学院,难冶有色金属资源高效利用国家工程实验室,湖南长沙,410083)

摘 要: 在260 ℃高压溶出黄铁矿制备高硫高铁的铝酸钠溶液,研究溶液温度、保温时间、苛性比(αk)以及Na2CO3,Na2SO4和Na2C2O4等杂质对溶出液中铁质量浓度的影响。研究结果表明:溶液温度为50 ℃和60 ℃时,随着保温时间的延长,溶液中铁质量浓度略有降低;苛性比为3.0左右时,随着Na2CO3质量浓度的升高,溶液中铁质量浓度略有升高,而Na2SO4和Na2C2O4质量浓度的升高则能显著提高溶液中的铁质量浓度;随着溶液苛性比的升高,溶液中铁质量浓度在苛性比为 2.0~2.5之间有1个急剧升高的区间,然后逐渐趋于稳定。

 

关键字: 黄铁矿;铝酸钠溶液;铁质量浓度;高压溶出

Variation of mass concentration of iron in sulfursodium aluminate solution
NIU Fei, LI Xiaobin, ZHOU Qiusheng, QI Tiangui, LIU Guihua, PENG Zhihong

National Engineering Laboratory for Efficient Utilization of Refractory Non-ferrous Metals Resources,
School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan

Abstract:The sodium aluminate solution with high iron and sulfur content was prepared by the high-pressure digestion of pyrite at 260 ℃. The influences of temperature, residence time, caustic ratio αk and the content of Na2CO3, Na2SO4 and Na2C2O4 on the mass concentration of iron in sodium aluminate solution were investigated. The results show that the mass concentration of iron decreases slightly with the increase of residence time when the solution temperatures are 50 ℃ and 60 ℃. When αk is approximately 3.0, the mass concentration of iron increases slightly with the increase of Na2CO3 mass concentration and obviously with the increase of Na2SO4 and Na2C2O4 concentration. The mass concentration of iron increases rapidly with αk from 2.0 to 2.5 and then enters a relatively stable state with the continuous increase of αk.

 

Key words: pyrite; sodium aluminate solution; mass concentration of iron; high-pressure digestion

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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