气力输送是以在管道内运动的气体为动力介质,将进入管道内的物料运送到指定地点的一种送料方式。从流体力学的观点看,固体物料与流体混合在一起而形成的流束叫两相流,若流体为气体者就叫固气两相流。在喷射混凝土的气力输送中,由于固体粒子如水泥、砂、石的粒径不同,比重不同,而化学性质又有很大差异,对这类物料的输送我 Pneumatic conveying is a kind of feeding method that uses the gas moving in the pipeline as a power medium to transport the materials entering the pipeline to a designated place. From the point of view of fluid mechanics, the stream formed by the mixing of solid materials and fluids is called two-phase flow. If the fluid is gas, it is called solid-gas two-phase flow. In the pneumatic conveying of shotcrete, due to the different particle sizes and specific gravities of solid particles such as cement, sand and stone, the chemical properties are very different.