Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (10): 1473-1477.DOI: 10.12068/j.issn.1005-3026.2014.10.024

• Materials & Metallurgy • Previous Articles     Next Articles

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
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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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