用CO和H_2为还原剂研究了钛磁铁矿原矿,烧結矿和球团矿的还原性。实驗表明,球团矿能改善钛磁鉄矿的还原性。对还原机理和速率的初步探討指出,該类矿石的还原系受表面反应控制。还原反应为一級反应,其視激活能在590℃以上对CO为14,600卡/克分子;对H_2为14,000卡/克分子;在590℃以下,对CO为16,000卡/克分子。
Solid state reduction of raw titaniferous magnetic ore, its sinter, and pellets with H_2 and CO have been studied at various temperatures. It has been found that pelletization remarkably increases the reducibility of the raw ore. Preliminary studies of the rate and mechanism of reduction of the raw ore indicate that the rate of reduction is controlled by surface reaction and the reaction is of the first order. At temperatures above 590℃, the apparent activation energy is 14,600 cal/mol for CO and 14,000 cal/mol for H_2; while it is 16,000 cal/mol for CO at temperatures below 590℃.
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