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本文研究了马钢两种精矿的矿物组成及理化性能,对于凹磁精矿中配加不同量的凹重精矿烧结矿进行了宏观、微观结构及烧结热工制度的分析,确定了凹重配加量达30％时烧结矿强度严重下降的原因,并提出改进措施。对于凹磁精矿中配加少量钢渣,有利于提高烧结矿强度,对凹磁精矿烧结矿在碱度(CaO/SiO_2)1.5～2.5之间出现强度衰减区的机理进行了研究,并测定了不同碱度凹磁精矿烧结矿的低温还原粉化性能。
In this paper, the mineral composition and physical and chemical properties of two kinds of concentrate of Masteel were studied. The macroscopical, microstructure and sintering thermal system of concave ore concentrate with concave and heavy concentrate added with different amounts of concave magnetic concentrate were analyzed, The reason why the intensity of sinter seriously decreases when the amount of re-blending increases up to 30% and the improvement measures are put forward. For concave magnetic concentrate with a small amount of steel slag, help to improve the strength of sinter, concave magnetic concentrate sinter in the basicity (CaO / SiO_2) 1.5 ~ 2.5 strength attenuation zone between the mechanism was studied and determined Low alkalinity concave magnetite ore sinter low temperature reduction pulverization performance.