Clarence Richard Services

Asphalt Continuous Mix Operation - On-Line

Cold feed Bins, Rap Bins are volumetric feeders and relatively easy to operate. Mineral filler and dust silos can be difficult if not equipped correctly. Now, with SMA and WMA, we are adding all
sorts of material to our mix from wax beads to water, or fiber to powders, even liquid chemicals.
Venting gets to be a problem with some weighing devices when blowing material in the silo and
blowing material away from the silo discharge scale. The Exhaust Fan is a dust feeder. The more
the damper is opened, the more dust is taken from the dryer. The dust makes a pit stop in the
baghouse before being returned in spurts, partially returned or rejected. Some plants use a dust
surge bin to even out the dust flow.

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