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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 (1300–1350°C) 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_(2)O_(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 (~1300°C), 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-雷恩工艺是一种从腐泥红土矿石生产镍铁的节能技术，其中回转窑中需要一个半熔融区（1300-1350°C）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。在这项研究中，季碱性（（CaO + MgO）/（Al_（2）O_（3）+ SiO_（2））的质量比对100％CO中掺入各种CaO的红土矿石熔融特性的影响调查了大气，还观察到了镍铁颗粒的生长。结果表明，特征熔解温度随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，由于产生了低熔点透辉石，特征聚变温度随后在达到最小值（〜1300°C）之前下降。液相的存在改善了镍铁颗粒的生长。

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