Sintering, Reduction and Gasification of Single Composite Pellet Made of Fine Iron Ore and Heavy Oil

Abstract

Single composite pellets made of fine iron are and heavy oil were heated in a vertical silica tube in which nitrogen gas was moving upwards. Production rates of gaseous components and temperature of the pellets were measured. The temperature of the reactor tube ranged from 850 to 1, 050°C, the mixing ratios were 0.18 and 0.20 kg-oil/kg-ore, and the diameters of the composite pellets were 3.5 and 7 mm.
Gasification of the heavy oil was completed within 120 seconds, and H₂, H₂O, CH₄, C₂H₄, C₂H₆, CO and CO₂ were obtained as major gaseous products. The mechanism of CO and CO₂ formation was found to be different from that of the other gases.
Sintering and reduction of the fine iron are took place simultaneously with the gasification of the heavy oil, and porous pellets with a reduction degree of 1530% were obtained.