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Modern metering technology throughout the cement manufacturing process

This paper describes a new type of weighfeeder designed specifically for the feeding and blending applications of difficult to handle materials found in the cement manufacturing process. The design and control scheme is described along with the features that address the requirements for handling specific materials such as, coal, coke, raw meal, fly ash, and alternate fuels. The rotor weighfeeder is a horizontal rotary air lock and gravimetric feeder combined in a single housing. The unit utilizes three sensors, a strain gauge load cell (weight), and two encoders-one for speed and the other for material location within the rotor.