Effect of CaO and SiO2 on swelling and iron whisker formation during reduction of iron oxide compact
Effect of CaO and SiO2 on swelling and iron whisker formation during reduction of iron oxide compact
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DOI：
10.1179/1743281211y.0000000022
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发表时间：
2011-08
影响因子：
2.1
通讯作者：
H T Wang;H Y Sohn
中科院分区：
文献类型：
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作者：
H T Wang;H Y Sohn
研究了CaO和SiO2对氧化铁还原过程中膨胀和铁晶须生长的影响。由氧化铁精矿和 SiO2/CaO 组成的压块在空气中烧结 1 小时，在 900°C 下被 CO 还原至 80-90%。将还原的压块破碎，通过SEM检查晶须的形成。结果表明，SiO2对抑制膨胀的作用是复杂的，但%CaO的增加有效地抑制了膨胀和长铁晶须的生长。 SEM结果表明，随着%SiO2含量的增加，晶须生长的成核位置由分散位置变为紧密簇状，而晶须数量随着%CaO含量的增加而增加。这项工作中开发的概念图充分展示了 SiO2 和 CaO 含量对膨胀和铁晶须生长的影响。
The effects of CaO and SiO2 on swelling and iron whisker growth during iron oxide reduction were investigated. Compacts made up of iron oxide concentrate and SiO2/CaO sintered for 1 h in air were reduced by CO at 900°C to 80–90%. The reduced compact was broken to be examined for the formation of whisker by SEM. The results showed that the effect of SiO2 on suppressing swelling is complex, but an increase in %CaO effectively suppressed swelling and long iron whisker growth. The SEM results indicated that the nucleation sites of whisker growth were changed from disperse locations to close clusters with an increase in %SiO2, while the number of whiskers increased with an increase in %CaO. A conceptual diagram developed in this work presents adequately the effects of SiO2 and CaO contents on swelling and iron whisker growth.