Type LS screw conveyor has been used in various departments of the national economy, such as building material, metallurgy, chemical industry, electric power, coal, machinery, light industry, food and the food industry, is suitable for conveying powder, granulated and small lump materials, such as cement, coal, grain, chemical fertilizer, ash, sand, such as coke, unfavorable conveying perishable materials, big viscosity, easy to agglomerate.