碱金属对焦炭光学组织的影响

 为了研究碱金属对高炉焦炭光学组织的影响，在10%质量浓度的单质钾气氛中进行焦炭的吸附和溶损试验，然后对原始焦炭、无碱反应后焦炭、加碱反应后焦炭的光学组织进行鉴定。结果发现，与各向异性组织相比，焦炭的各向同性组织强度低、反应性高，并且各向同性程度越高，反应性越高；但是焦炭加碱后，碱金属对各向同性组织的催化作用没有对各向异性强，以至于各向异性组织的反应性要高于各向同性组织。原因是各向异性组织对碱金属的吸附较强，且碱金属在其内部渗透能力较强，从而生成更多的层间化合物。另外，可以在炼焦过程中适当增加气煤比例，不仅能节约炼焦成本，还能提高焦炭的抗碱性能。

Effect of Alkalis on Optical Texture of Coke

In order to research the impact of alkalis on the optical texture of coke, a gaseous impregnation experiment and a solution loss experiment on coke in 10% mass ratio alkalis atmosphere was taken. The optical texture of original coke, reacted coke without alkalis and reacted coke within alkalis was determined. The results show that, compared with anisotropic texture, isotropic texture has a higher reactivity and a lower intensity. In addition, isotropic degree of texture is higher, the reactivity is higher. But when the alkalis impregnate the coke samples, its catalytic action on isotropic texture is lower than that in anisotropic texture. So the reactivity of anisotropic texture is higher than that of isotropic texture, the result of which is that, the anisotropic texture has a higher adsorption capacity and the adsorbed alkalis has a higher infiltration capacity in coke matrix, so more graphite intercalation compound are created. Besides, increasing the proportion of gas coal in coking process can not only save the cost of coking, also enhance the alkali resistance of coke.