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利用扫描电镜和X射线衍射分析研究了富硼渣MgO-B2O3-SiO2-Al2O3-CaO渣系在不同冷却速率下,连续冷却和分段冷却时富硼渣中遂安石相的析出行为.试验结果表明,熔渣以不同的冷却速率由1 500℃冷却到800℃时,由于富硼炉渣中高熔点的镁橄榄石相先于遂安石相析出,对遂安石相的析出起到阻碍作用.采用分段冷却的方法,在1 500～1 200℃温度区间快速冷却,可以很好地抑制镁橄榄石相的析出,减弱镁橄榄石相对遂安石相成核与粗化的阻碍作用;1 200℃保温使得粒子之间可以充分地相互作用,有利于遂安石的成核与粗化.可见,遂安石相的析出和长大,不仅受过冷度和黏度的影响,而且受镁橄榄石结晶程度的影响.
The precipitation behavior of Sui’an stone phase in boron-rich slag during continuous cooling and segmented cooling at different cooling rates was studied by scanning electron microscopy and X-ray diffraction analysis. The results show that when the slag is cooled from 1 500 ℃ to 800 ℃ at different cooling rates, the precipitation of the Sui’an lithofacies hinders the precipitation of the high-melting forsterite phase ahead of the Sui’an phase, Segmented cooling method, rapid cooling in the temperature range of 1 500 ~ 1 200 ℃, can well inhibit the forsterite phase precipitation, forsterite fading forsterite nucleation and coarsening of the obstruction; 1 200 ℃ insulation So that the particles can fully interact with each other, which is in favor of nucleation and coarsening of Sui’an rock.It can be seen that the precipitation and growth of Sui’an stone phase are not only affected by the degree of undercooling and viscosity but also influenced by the degree of crystallization of forsterite Impact.