气体式的除渣可均质化熔液并帮助合 金的纯净度。均质化有助于分析的同 等化及在槽内熔液的均温。气体式的 净化可以使得合金和脱氧剂快速分布 和分解，并且很快调整到铸造温度。 有害气体含量的减少和非金属杂质的 分离，由于它们从熔解过程中排除， 产生了金属品质改善的结果
All Capital Refractories gas diffusers are supplied to suit the customers' requirements with respect to the metal casings and gas feed pipe work, the choice of these being dictated by the application, this being particularly important in aluminium melt applications if there is the possibility of chlorine being used as a purging gas.