噴流層による粉鉄鉱石の還元

概要

論文の詳細を見る
The most serious problem inherent to the fluidized bed reduction of iron ore is sintering. One of the solution to this problem is to use relatively coarse powder of iron ore. Spouted bed is a technique of processing relatively coarse granular materials. The purpose of the present investigation is to try spouted bed reduction with relatively coarse powder of iron ore and to know characteristics and feasibility of this technique. Experiments were performed with transparent models and spouting conditions were determined. Effects of reductant gas flow rate, cone angle, particle size distribution on the spouted bed reduction were investigated. It was turned out that the spouted bed reduction was effective to relatively coarse granules of iron ore. Rate of reduction was proportional to the flow rate of reductant gas fed to the bed. Sintering tendency was less with spouted bed than with usual fluidized bed in a low gas velocity region. Critical flow rate and reducing temperature causing sintering were shown. A discussion was made on the relation between the results obtained with model experiments and with high temperature reduction.
社団法人日本鉄鋼協会の論文
1973-03-01