Where items to be processed are heavy and/or varied in size, making the use of rails difficult, or for relatively low production blasting operations, a large volume abrasive storage elevator (bucket elevator) and steel blast room floor may be a viable option.
Airblast AFC manufactures a wide range of large volume abrasive storage elevators, which allow a sufficient amount of abrasive to be stored and therefore used prior to the operator stopping to recover media. This elevator includes all of the features of our standard bucket elevator and air wash, which separates and reclassifies media as described below:
- Initially the abrasive falls over an electro vibrating sieve. This sieve is set at 40 degrees and delivers all large contaminates directly to a waste collection bin at floor level.
- All particles that make it through the sieve fall into an air wash. Any dust particles are taken away via connecting duct work to the dust extractor.
- Also caught up in this air stream are any particles of spent abrasive. These particles will, if allowed, damage the filter media. To counter this, in between the air wash and the duct to the extractor we install an air plenum. As the air travels slower through this section any particles of spent abrasive fall out of the air stream and are delivered to the waste collection bin.
- Finally, good abrasive is delivered to the hopper above the blast machines. This high attention to eliminating contamination from the abrasive substantially increases the life of dust collector filters.
- Once all the abrasive in the blast machine has been delivered, or at any other time the operator releases the dead mans handle, the blast machine is automatically filled with fresh abrasive from the hopper above.
Auger Screw Recovery Systems
In order to assist with the media recovery process and when a full floor automated system is not possible, Airblast AFC often utilizes a partial floor abrasive recovery system. These systems incorporate one or more auger screw conveyors, which typically include a series of longitudinal screws, along with a cross screw, which feeds the bucket elevator. These screws are generally laid out in an "H" configuration. Airblast AFC incorporates an adjustable baffle media metering plate covering and protecting the screw to prevent overloading.