Hopper-bottom Steel Silo This type is free-flow discharging with good cleaning system without residue.It's widely used in storaging seed,flour,feed,breed,cement and chemical , which need to be cleaned frequently. With solid structure the conical- bottom has large strength .There are three kind of angles of 40,45and 60,among which the angle of 60 conical-bottom is usually be used to store bigger pelletled and powdered materials of high viscosity Features : It is famous for the free-flow discharging and free of humanpower ,so it can save resources and cost .