1. Screw conveyor is the main unit of mechanized transportation work in all sectors of industry and agriculture, which can reduce the labor intensity, improve work efficiency and wide application range. 2. Applicable to various industries, such as building materials, chemical, electric power, metallurgy, grain, etc., suitable for horizontal or inclined conveying of powdery, granular and small block materials, such as coal, ash, slag, cement, grain, etc. The material temperature is less than 200 °C. 3. This machine is used for conveying materials horizontally, obliquely or shortly. 4. It has the function of mixing at the same time of conveying, and can feed and discharge at multiple points.