鉄鉱石類の還元試験方法に対する検討

概要

論文の詳細を見る
Reductions of iron-oxide pellets in fixed bed and single pellet with CO gas were fundamentally studied in order to determine the reducibilities of pellets. The results are summarized as follows. On the reduction of pellets in fixed bed with CO gas : 1) Since distribution of gas concentration changed in axial direction, reduction degree of pellet became different between the upper and lower layer in fixed bed. As a result, critical value of gas flow was not obtained. 2) Size of pellet affected largely its reducibility, then the size of sample should be selected to be narrow range of ±1 mm. 3) Both the equation of 1st order reaction proposed by German researchers and other equations sometimes were satisfied with the experimental values, but they must be studied in more datail to be used as the method for indicating the reducibility of pellet. From the present experimental results, it can be concluded that method for reduction of single pellet is to that in fixed bed because the parameters (for example, k or D) obtained from its test are able to apply the process analysis.
1970-11-01