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金属矿山 ›› 2008, Vol. 38 ›› Issue (9): 54-56.

• 矿物工程 • 上一篇    下一篇

红土镍矿为原料制备白炭黑的最佳工艺研究

刘岩,张霞,李在元,翟玉春,申晓毅   

  1. 东北大学
  • 收稿日期:2008-07-18 出版日期:2008-09-15 发布日期:2011-07-14
  • 基金资助:

    “973”国家重点基础研究发展计划项目(编号:2007CB613603)。

Study on the Optimum Technological Conditions of Preparing Silica White from Laterite Nickel Ore

Liu Yan,Zhang Xia,Li Zaiyuan,Zhai Yunchun,Shen Xiaoyi   

  1. Northeastern University
  • Received:2008-07-18 Online:2008-09-15 Published:2011-07-14

摘要: 以红土镍矿为原料,采用碱熔融-碳酸化分解方法制备出白炭黑产品。通过正交试验L9(34),找到碱熔融反应的最佳工艺条件:碱矿质量比150/50,反应温度823 K,反应时间3.5 h,原料粒度1.704 μm。该条件下放大试验二氧化硅转化率为79.10%。浸出液经碳酸化分解制得白炭黑产品符合国家HG/T3065-1999标准。碳酸化分解后所得溶液经苛化工艺实现碱和二氧化碳的循环利用。

关键词: 红土镍矿, 白炭黑, 碱熔融, 碳酸化分解

Abstract: Silica white was prepared from laterite nickel ore by the method of molten NaOH-carbonization decomposition. The optimum technological conditions were found through alkali melting reaction orthogonal experiment L9(34) to be: a mass ratio of alkali vs. ore 150/50, reaction temperature of 823 K, reaction time of 3.5 h and material particle size of 1.704μm. The extraction ratio of SiO2 in enlarged experiment reached 79.10%. The silica white product obtained by the carbonation decomposition of leached solution conforms to the state standard of HG/T3065-1999. The solution obtained by carbonation decomposition was causticized to recycle the alkali and carbon dioxide.

Key words: Laterite nickel ore, Silica white, Alkali melting, Carbonation decomposition