Abstract: The crystal phases, porosity and surface morphology of self-desulfurization residue of Huangling coal ash were studied by XRD, N₂ absorption and SEM.It was found that the total content of sulfation product CaSO₄ and BaSO4 was 8.5% in the self-desulfurization residue obtained at 800 ℃, while that of active CaCO₃ and CaO was 4.9%.The residue surface was composed of many 7.5—15 μm particles that containd some 0.7—1.5 μm button-like particles and pores.However neither CaCO₃,CaO,CaSO₄ nor BaSO₄ were found in the residue obtained at 1200℃,due to thermal decomposition and intense melting.The residue surface was composed of some 30μm particles that containd 3—5 μm nonporous particles with smooth surface.There was a distinct decrease in porosity parameters of the residue when the furnace temperature increased from 800 ℃ to 1200 ℃.

摘要： 利用XRD、氮吸附仪和SEM分析了黄陵煤灰自身固硫渣样的微观结构.发现800℃下渣样中CaSO₄和BaSO₄含量达到8.5%、CaCO₃和CaO含量达到4.9%，渣样表面由许多7.5～15μm的块状颗粒组成，其表面又含有一些0.7～1.5μm的纽扣状层片结构和孔隙.但1200℃下因热力分解和高温熔融，渣样中不再存在CaCO₃、CaO、CaSO4或BaSO₄晶相，渣样表面由少量30μm左右的大块颗粒组成，其表面又含有一些3～5μm的小块颗粒，带有明显烧结胀大和高温熔融的痕迹.1200℃下渣样的孔隙参数比800℃时急剧减少.