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往烧结料中灌入环氧树脂,凝固后能很好地保持烧结料的原有状态,将该凝固块切片,磨平制成光片后进行宏观和微观研究.用这一方法加上筛分分析和测定透气性,可得如下结果:以精矿粉为主(占含铁料的90%)的首钢烧结料大部分形成小球.其中,80%是有核球,球核一般是大于0.8mm的颗粒;细粉(<0.1mm)大部分成为有核球的包裹层,小部分自己形成无核球.0.1至0.8m的中等颗粒难以成为球核或包裹层,成球率只有细粉的30%,它们分散在小球之间的空隙中,影响烧结料的透气性.当精矿粉中<0.1mm粒级含量从62%增至93%时,料层透气性提高,料层厚度可从原有的270mm增至420mm.
Epoxy resin is poured into the sintering material to maintain the original state of the sintering material well after the solidification, the macroscopic and microscopic studies are carried out after slicing and solidifying the solidified material into a light sheet, Analysis and determination of gas permeability, the following results can be obtained: Most of the Shougang sinter based on concentrate powder (90% of the iron-containing material) formed small balls, of which 80% More than 0.8mm particles; most of the fines (<0.1mm) become nucleated coating, a small part of their own formation of non-nuclear ball .0.1 to 0.8m of medium particles difficult to become a core or coating, the ball rate is only The fine powder 30%, which are dispersed in the gap between the balls, affecting the permeability of the sintering material.When the <0.1mm fraction content of concentrate powder increased from 62% to 93%, the permeability of the material layer increased, Material thickness from the original 270mm to 420mm.