本文通过对经附碳处理的赤铁精矿粉在预还原时附碳（ＣＡ）效应的研究，提出了附碳的温度效应、催化效应及物理效应．分析了压力对各种效应的影响，并探讨了这些效应的机理． In this paper, the temperature effect, catalytic effect and physical effect of carbon attached to carbon on the carbon reduction (CA) effect during prereduction are studied. The effects of pressure on various effects are analyzed and the mechanism of these effects is explored.