THE INFLUENCE OF SPECIFIC IMPURITIES ON THE NUCLEATION AND GROWTH OF MAGNETITE DURING REDUCTION OF ARTIFICIALLY PREPARED HEMATITE

被引：9
作者：
CHAIGNEAU, R
HEEREMA, RH
机构：
[1] Department of Raw Materials Technology, Delft University of Technology, Delft
来源：
METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY | 1991年 / 22卷 / 04期
关键词：
D O I：
10.1007/BF02654289
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of traces of specifically added impurity oxides on the reduction behavior of hematite to magnetite has been investigated. Oxides of Al, Ca, Mg, or Si have a direct influence on the nucleation and growth of the magnetite. To distinguish between these nucleation and growth phenomena on the basis of the reduction rate, the nucleation model of Avrami-Erofeyev has been used. Cracking of the magnetite was observed, which was found to depend on the nature and amount of added impurities. Explanations based on mineralogical data are presented for the observed behavior.
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页码：503 / 511
页数：9
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