通过试验证明，加入适量硫酸铝对于溶解乙炔气瓶填料（轻质硅酸钙材料）具有如下作用：在料浆阶段能够促进料浆凝胶化，防止物料下沉；在蒸压过程中能够产生微膨胀，防止填料收缩，并能够使填料强度显著提高．同时，采用ＤＴＡ、ＸＲＤ、ＳＥＭ方法对其作用机理进行了研究． Through tests, it has been proved that adding appropriate amount of aluminum sulfate to dissolve acetylene cylinder fillers (light calcium silicate materials) has the following effects: it can promote gelation of the slurry in the slurry stage and prevent the material from sinking; it can be generated during the autoclave process. Micro-expansion prevents shrinkage of fillers and can significantly increase the filler’s strength. At the same time, the mechanism of action was studied by DTA, XRD and SEM.