We are exploring the feasibility of processing wet, mixed fly and bottom ash (10-20% moisture) through a dryer and classifier. The feed rate will range between 50-100 wet stph, depending on the moisture content). The wet ash will be loaded via a front end loader from a stockpile into a feed hopper, equipped with a top-mounted grizzly screen. We are having difficulty selecting a feeder. The mixed ash is generally no larger than an inch in diameter and is probably 60% passing 325 mesh. It forms somewhat durable agglomerations that can be broken down by hand or with a bucket of a loader without too much difficulty. We are somewhat concerned about the potential for tramp metal in the feeder system as the nearest magnetic separator will be downstream prior to the dryer. The biggest concern we have is avoiding bridging in the feed hopper, which has been design with 70 degree walls, a tapered opening (1 ft on tail end to 3' on the discharge end) and inward sloped walls on the discharge side of the hopper. We have been considering belt, apron, and vibratory pan feeders. Any suggestions? Any feedback is much appreciated ■
Wet Fly Ash Feeder
We are exploring the feasibility of processing wet, mixed fly and bottom ash (10-20% moisture) through a dryer and classifier. The feed rate will range between 50-100 wet stph, depending on the moisture content). The wet ash will be loaded via a front end loader from a stockpile into a feed hopper, equipped with a top-mounted grizzly screen. We are having difficulty selecting a feeder. The mixed ash is generally no larger than an inch in diameter and is probably 60% passing 325 mesh. It forms somewhat durable agglomerations that can be broken down by hand or with a bucket of a loader without too much difficulty. We are somewhat concerned about the potential for tramp metal in the feeder system as the nearest magnetic separator will be downstream prior to the dryer. The biggest concern we have is avoiding bridging in the feed hopper, which has been design with 70 degree walls, a tapered opening (1 ft on tail end to 3' on the discharge end) and inward sloped walls on the discharge side of the hopper. We have been considering belt, apron, and vibratory pan feeders. Any suggestions? Any feedback is much appreciated ■