... : 8cbm/h 3.Motor Power: 0.75-1.5KW New Design and Best Price Spiral Feeder Applications 1) widely used in building materials ... block materials, such as cement, coal, grain, chemical fertilizer, ash, sand, etc. note work environment should be between -20 °C ~ 50 ... 100 14 250 250 1.1-4.0 90 24 New Design and Best Price Spiral Feeder