东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (10): 1473-1477.DOI: 10.12068/j.issn.1005-3026.2014.10.024

• 材料与冶金 • 上一篇    下一篇

红土矿半熔融态还原渣金界面分离的影响因素

吕学伟,袁秋刚,刘梅,白晨光   

  1. (重庆大学 材料科学与工程学院, 重庆400044)
  • 收稿日期:2013-09-18 修回日期:2013-09-18 出版日期:2014-10-15 发布日期:2014-05-19
  • 通讯作者: 吕学伟
  • 作者简介:吕学伟(1982-),男,山东莱芜人,重庆大学副教授,博士.
  • 基金资助:
    国家自然科学基金重点资助项目(51234010).

Factors Influencing Interfacial Separation of Ferronickel from Slag in Semimelting Reduction of Nickel Laterite

LYU Xuewei, YUAN Qiugang, LIU Mei, BAI Chenguang   

  1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
  • Received:2013-09-18 Revised:2013-09-18 Online:2014-10-15 Published:2014-05-19
  • Contact: LYU Xuewei
  • About author:-
  • Supported by:
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摘要: 红土矿半熔融态还原工艺中金属与渣相的界面分离及液渣从耐火材料表面的脱除是该工艺能否工程化的核心问题.针对该问题,考察了CaO和体系温度对渣铁分离行为的影响规律,同时实验研究了炉渣在不同耐火材料上的界面铺展行为.实验结果表明:不添加CaO时,1440℃金属聚集效果较好,磁选后“精矿”金属质量分数为61%;随着CaO质量分数的增加,液态金属易于团聚与长大,精矿金属的质量分数增加显著,在1400℃,15%CaO时可达937%;熔渣与Al2O3质耐火材料较易润湿,与碳质耐材较难润湿,在实验范围内随着炉渣碱度的增加其与耐材的润湿性变差.

关键词: 镍铁, 半熔融态, 分离, CaO, 润湿性

Abstract: The separation of metal and slag and tapping of slag are the key issues for the industrialization of the semimelting reduction process of nickel laterite ores. To solve the problem, the effect rules of CaO and system temperature on the behavior of metalslag separation were experimentally investigated, as well as the interface spreading behavior of slag on different refractory materials. The results showed that, without CaO addition, the liquid metal agglomerates well at 1440 ℃, and the metal mass fraction of “concentrate” from magnetic separation is 61%. With increasing the mass fraction of CaO, the liquid metal gets easier to agglomerate and grow up, and the mass fraction of metal is improved significantly, reaching up to 937% with 15%CaO at 1400 ℃. The wettability of slag to Al2O3 refractory is good, but it is difficult to spread on graphite. In the experimental range, increasing the basicity of slag deteriorates its wettability.

Key words: ferronickel, semimelting, separation, CaO, wettability

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