Our silos keep mix at 300°F
Astec silos are insulated so well because they are designed as a storage system to keep asphalt hot for a minimum of four days. Operators have even reported storing mix for up to a week.
Batcher
The mix moves by drag conveyor or bucket elevator into a three-ton batcher atop the silo. When full the batcher releases the slug of mix. Mix drops through the rapid-opening clam gate into the silo and flattens on impact. Batchers with a single radial-type gate can off-center the drop. Our batcher clam gates center the drop into the silo and form a flat mix surface, which prevents mix segregation. Batchers are a major source of heat loss. That is why Astec insulates batcher enclosures.
Top
Heat rises so we put a whole foot of insulation on top.
Cylinder
Two layers of stiff sheet insulation are staggered to eliminate heat-leaking seams along the silo cylinder. These strong batts of insulation actually support the silo skin. Astec does not use heat-leaking stand-off brackets.
Cone
Cones are heated either electrically or with thermal oil. Six inches of insulation on the outside of the cone’s bottom portion help hold in the heat. A partition covered with an 8 inch layer of insulation forms a warm, dead-air space around the top portion of the cone for even greater energy savings.
More Info
STORAGE SILOS - Insulation
