Agitating – Mortar mixer type – With heating or drying
Patent
1992-09-25
1993-11-16
Gerrity, Stephen F.
Agitating
Mortar mixer type
With heating or drying
34136, 34137, 366 33, 366 57, 432117, B28C 546
Patent
active
052617386
ABSTRACT:
A drum mixer which is useful in the continuous production of asphalt paving composition. The mixer includes a hollow drum which is mounted for rotation about an inclined axis, and the aggregate is introduced into the upper end of the drum so that as the drum rotates, the aggregate cascades through the interior of the drum and moves toward a discharge outlet at the lower end of the drum. A burner is mounted adjacent one end of the drum so that a heated gas passes through cascading aggregate. To permit the temperature of the exhaust gas to be maintained within acceptable limits so as to avoid detrimental effects to a downstream filtering baghouse, a gas flow bypass system is mounted in the downstream end portion of the drum. The bypass system may be selectively opened and closed, so that a portion of the heated gas may be selectively permitted to pass through a portion of the length of the drum and to the exhaust duct without passing through the cascading aggregate, which causes the temperature of the exhaust gas to rise. Upon the bypass tube system being closed, all of the heated gas flows through the cascading aggregate and the temperature of the exhaust gas is thus lowered.
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Astec Industries Inc.
Cooley Charles
Gerrity Stephen F.
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