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首页> 外文期刊>ISIJ international >Effect of Quaternary Basicity on Melting Behavior and Ferronickel Particles Growth of Saprolitic Laterite Ores in Krupp-Renn Process
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Effect of Quaternary Basicity on Melting Behavior and Ferronickel Particles Growth of Saprolitic Laterite Ores in Krupp-Renn Process

机译：克虏伯-雷恩过程中第四纪碱度对腐殖红土矿石熔融行为和镍铁颗粒生长的影响

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摘要

Krupp-Renn process is an energy-saving technology for ferronickel production from saprolitic laterite ores, in which a semi-fused zone (1 300-1 350℃) in the rotary kiln is required for the coalescence of ferronickel particles. Fluxes are crucial for the liquid phase formation during the coalescence stage. In this study, effect of quaternary basicity ((CaO+MgO)/(Al_2O_3+SiO_2) mass ratio) on the melting characteristics of laterite ore blended with various amount of CaO in 100% CO atmosphere are investigated, and the growth of ferronickel particles is also observed. It is shown that the characteristic fusion temperatures first decline and then increase with increasing of basicity, which is closely related with the presenting silicate minerals in the reduced products involving olivine, diopside, monticellite, akermanite and merwinite. At the basicity of 0.8-1.2, the characteristic fusion temperatures drop subsequently before reaching a minimum (～1 300℃), due to the generation of low-melting-point diopside. The growth of ferronickel particles is improved by the presence of liquid phase.
机译：克虏伯-雷恩（Krupp-Renn）工艺是一种从腐泥红土矿石生产镍铁的节能技术，其中在回转窑中需要一个半熔融区（1300-1 350℃）以使镍铁颗粒聚结。助焊剂对于聚结阶段中液相的形成至关重要。本研究研究了在100％CO气氛中季碱度（（CaO + MgO）/（Al_2O_3 + SiO_2）质量比）对掺有不同CaO量的红土矿石熔融特性的影响，并研究了镍铁颗粒的生长也观察到。结果表明，特征熔解温度随着碱度的增加先降低后升高，这与橄榄石，透辉石，蒙脱石，金红石和皂石的还原产物中存在的硅酸盐矿物密切相关。在0.8-1.2的碱度下，由于低熔点透辉石的产生，特征聚变温度随后在达到最小值（〜1300℃）之前下降。液相的存在改善了镍铁颗粒的生长。

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  • 来源
    《ISIJ international》 |2015年第9期|1828-1833|共6页
  • 作者

    Guanghui LI; Jun LUO; Zhiwei PENG; Yuanbo ZHANG; Mingjun RAO; Tao JIANG;

  • 作者单位

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

    School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    saprolitic laterite; ferronickel; reduction; basicity; CaO;

    机译：腐泥红土;镍铁减少;碱性氧化钙;

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