A rotor weigh feeder is a continuous gravimetric feeding system designed to accurately measure and control the flow rate of bulk solid materials. It uses a rotating rotor mechanism combined with weighing technology to achieve precise feeding of powders, granules, and other dry materials.

Working Principle

The material enters the rotor chamber through an inlet. As the rotor rotates, material is transported through the feeding pockets or chambers. A weighing system continuously measures the material flow, while a control unit adjusts rotor speed to maintain the required feeding rate. This allows stable and accurate mass flow control.

Main Applications

Rotor weigh feeders are widely used in industries such as:

Cement production – feeding raw meal, pulverized coal, clinker additives, and alternative fuels

Mining and minerals – dosing limestone, ore powder, and mineral materials

Chemical industry – accurate feeding of powders and granular chemicals

Fertilizer production – continuous feeding of fertilizer raw materials

Power plants – feeding biomass, coal, and other solid fuels

Advantages

High feeding accuracy and repeatability

Suitable for dusty and abrasive materials

Compact design with low maintenance requirements

Continuous automatic flow control

Reliable operation under harsh industrial conditions

Compared with traditional volumetric feeders, a rotor weigh feeder provides direct mass measurement, making it ideal for processes requiring precise material dosing and production control.