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首页> 外文会议>TMS annual meeting exhibition;Symposium on light metal >Experimental Investigation on Reduction of Cast Iron from Bayer Red Mud and Laterite Nickel
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Experimental Investigation on Reduction of Cast Iron from Bayer Red Mud and Laterite Nickel

机译：拜耳赤泥和红土镍矿还原铸铁的实验研究

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In this paper, a process of extracting cast iron from red mud and laterite nickel has been proposed. Red mud, lateritic nickel, CaO and coke were heated together inside an electric arc furnace so as to obtain a cast iron alloy. The experiments indicated that recovery rates of the cast iron alloy were from 70 to 89% when the coke content increases from 20 to 35%. The microstructure of the alloys depends mainly upon the coke content. The metallographic structure features white iron when addition of coke was below 25%. Free graphite flakes appeared when the coke content was 25%, where the microstructure may feature cementite and stripe-shaped graphite. If the coke content gets to 30% or more, the microstructure is characterised by grey iron. The test work shows that the impact energy increases and hardness decreases of the alloys with increasing coke content and the microstructures change accordingly from white iron to grey cast iron. In conclusion, this process is a potential technology for reduction of cast iron alloys from red mud and lateritic nickel.
机译：本文提出了一种从赤泥和红土镍中提取铸铁的方法。在电弧炉内将赤泥，红土镍，CaO和焦炭一起加热，以获得铸铁合金。实验表明，当焦炭含量从20％增至35％时，铸铁合金的回收率为70％至89％。合金的微观结构主要取决于焦炭含量。当焦炭的添加低于25％时，金相组织以白铁为特征。当焦炭含量为25％时，会出现游离的石墨片，其微观结构可能具有渗碳体和条形石墨。如果焦炭含量达到30％或更高，则显微组织的特征在于灰口铁。试验工作表明，随着焦炭含量的增加，合金的冲击能增加，硬度降低，显微组织从白铁变为灰铸铁。总之，该工艺是一种从赤泥和红土镍矿中还原铸铁合金的潜在技术。

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