The quantitative feeder (also known as belt scale) has high measurement accuracy, small feeding fluctuations, wide applicability to materials, easy use and maintenance, and is widely used in dynamic metering feeding. In the cement industry, quantitative feeders are mainly used for raw material blending, cement blending, and feeding measurement of block and particle materials in raw coal workshops. There are also a few quantitative feeders used for feeding measurement of raw material powder and alternative fuels. Due to the fact that the quantitative feeder is often a pre process section of the host equipment, its normal operation directly affects the operating rate and stability of the host equipment, as well as the quality stability of the host equipment products.
Technical features
Some process designers and users' understanding of quantitative feeders comes from belt conveyors. Only with a brand new understanding and deeper technical comprehension of the quantitative feeder can we do a good job in design and selection, ensuring stable and reliable operation on site. Compared with the belt conveyor, the quantitative feeder not only has the same conveying function, but also has the following significant features.
(1) Require weighing and quantitative feeding functions.
(2) Require to have both material bin unloading function. The tape conveyor only has a typical process connection and conveying function.
(3) The belt speed of the quantitative feeder is relatively low (generally<0.5 m/s) to ensure stable measurement, while the belt conveyor mainly measures the conveying speed from the perspective of conveying volume. Without deviation or slippage, the conveyor belt speed should be increased as much as possible, the conveyor belt width should be reduced, and the equipment and soil construction costs should be lowered.
(4) Quantitative feeders have certain requirements for the processing accuracy of the rollers, especially the weighing rollers, as well as the local processing accuracy and stiffness of the scale body, to ensure that the weighing section can measure and obtain data in a sturdy and stable manner. However, belt conveyors do not have strict requirements for this.
