Conveyors skip hoists

FIGURE 4.26 Bulk material vertical conveyors (a) rotor lift, (b) bulk flow, (c) skip hoist, and (d) gravity-discharge conveyor elevator. 

With a hoisting system, there needs to be a loading pocket to feed the skips. The installation includes a pair of loading flasks fed by a single chute with a vibratory feeder to properly load the belt. The chute is equipped with an in-line chute that includes a chain gate to help meter the flow of material and an arc gate to shut off the flow entirely. The chute loads a vibratory feeder that loads the conveyor evenly to a flask to provide a metered amount of material to the skips. This portion of the system is illustrated in Figure 3. 

Terlich, R. 2005. Conveyor Loading of Skips. In Proceedings of the 8th International Conference on Hoisting and Haulage, Perth, WA, Austraha, 5-7 September, Australian Institute of Mining and Metallurgy. 

A controlled discharge of the bulk solid from the silo was obtained with a belt conveyor, which drew across the slot outlet. To achieve a uniform flow of the bulk solid over the outlet area and promote the mass flow regime, the inclination of the belt could be adjusted between 0-10 degrees. The belt drive unit had a speed control allowing the belt speed to be varied between 5 and 200 mm/s. A skip and hoist arrangement was used to transfer the bulk solid discharged from the belt conveyor to a feed hopper, which was supported Ixom an independent framework, above the test silo. 

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