STUDY OF THE FACTORS AFFECTING THE ENERGY EFFICIENCY OF THE EXTRUSION PROCESS OF WET RAW MATERIALS

Abstract

The article provides a study of factors (screw speed and mass flow rate) affecting the operating conditions of the extruder, engine torque and specific mechanical energy for high-moisture raw materials. A laboratory extruder and a slotted die with a rheometer were used to measure the die torque. The die torque decreased with increasing screw rotation speed and increased with increasing mass flow. However, the increase in mass flow has led to a decrease in the specific mechanical energy. Increasing the screw speed increased the specific mechanical energy. This was due to the higher shear rates at higher screw speeds.