... rotating within a stationary tube... Spiral conveyor[Overview of Spiral conveyor]A conveyor consisting of a central shaft with helical ... kinds of powder, granular, small lump bulk materials such as clay powder, coal powder, sandstone, lumpy coal, cement, gravel, ... , sticky, easily curdled materials. [Specifications of Spiral conveyor]modetransport distance(m) capacity(t/h)power weight coalcementRaw ...