More specifically, this invention relates to a counter-flow asphalt plant having a recycle asphalt (RAP) feed to the combustion zone to produce high percentage RAP mixes without generating excessive blue smoke and having an exhaust gas heater to improve production rates with greater economy and efficiency of plant design and operation.
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Feed Hot Mix Asphalt Mixing Counter-Flow Drum-mixer Zones Air AC Hot Mix Asphalt Aggregate Mixing Combustion Heating Drying Captures)Dust)From)Plant)&)Silo) Evacuates Gases&Steam Provides)Air) forCombuson) Exhaust)Fan) Emission Control Equipment Insufficient Drying • Trapped moisture • Poor asphalt - aggregate bond • Tender mixes
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Jul 15, 2019 · In addition, it offers counter flow drum mix technology, which recaptures and burns emissions and vapors. Asphalt Plants The Company manufactures and produces hot-mix asphalt plants used in the production of asphalt paving materials. The Company's principal products include asphalt plants, combustion systems and fluid heat transfer systems.
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combustion zone . as . possible, but with enough drum length remaining to adequately . dry . and heat the material prior to reaching the coating zone. The amount of . virgin . aggregates and virgin asphalt cement fed to the process are adjusted according to the amount of . RAP . used and the condition of . the . asphalt cement in the . RAP
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Double Drum Counter Flow Asphalt Plant - Atlas Industries. The counterflow asphalt mixing plant will have many advantages over the standard drum mix plant. The standard drum mixer is a paralleflow plant. One of the best advantage is that the quality of hot mix asphalt is much better and burner fuel consumption is less. get price
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Dec 03, 2012 · Rap King plants are highly efficient counter-flow plants, able to produce mix with up to 50% RAP. With this consolidation, Astec now offers asphalt plants that produce between 72 and 450 tonnes per hour, and the company is also working on smaller plants in the 27- to 162-tonne production range. New pavements.
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Double Drum Counter Flow Asphalt Plant - Atlas Industries. The counterflow asphalt mixing plant will have many advantages over the standard drum mix plant. The standard drum mixer is a paralleflow plant. One of the best advantage is that the quality of hot mix asphalt is much better and burner fuel consumption is less. get price
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Abstract. A method for operating a counter-flow aggregate dryer for an asphalt plant in which primary aggregate materials are introduced into a first end of a horizontally rotating cylinder and
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The ALmix UF-Series Counter Flow Drum Mixer | Overview. The UF-Series Counterflow Drum Mixer is the flagship product from ALmix. Designed for asphalt producers seeking the most efficient, mechanically sound, aesthetically pleasing and adaptable asphalt plant the market has to offer.
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Counter-Flow Drum-Mixer Zones Air AC Hot Mix Asphalt Mixing Combustion Heating Drying Aggregate • Aggregate and air flow in opposite directions • Cold aggregate enters at the opposite end from burner • HMA exits at the burner end 7 Other Types of Drum Mixers • Double Barrel Drum Mixer – Counter flow dryer "inner" drum
Get a QuoteMore specifically, this invention relates to a counter-flow asphalt plant having a recycle asphalt (RAP) feed to the combustion zone to produce high percentage RAP asphalt products within a two
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Counterflow Drum Mixers. The E3 RAP-Star series of portable and stationary counterflow drum-mixers, with capacities from 200 to 600 tons per hour, combines high productivity and high RAP capabilities due to its unique early entry RAP design. The E3 RAP-STAR design features three heat transfer zones: convective, radiant and conductive.
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Abstract: A method for operating a counter-flow aggregate dryer for an asphalt plant in which primary aggregate materials are introduced into a first end of a horizontally rotating cylinder and travel to the second, discharge end of the cylinder through drying and combustion zones. Hot gases are generated in the combustion zone to flow in counter-current heat exchange relationship with the aggregate …
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the emission collection system (Hot Mix Asphalt Plants, 2000). In a counter-flow drum mixer, counter-flow means the material flows into the drum from the opposite direction as the exhaust gases. The mixing process is also different. The liquid asphalt cement mixing zone is located behind the burner flame zone.
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US6672751B2 - Counter-flow asphalt plant with combustion zone feed and exhaust gas heater - Google Patents. A counter-flow aggregate dryer for an asphalt plant is equipped with a secondary feeder
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Counterflow Drum-Mix Asphalt Plants. The Cedarapids / Standard Havens Magnum series of portable and stationary counter-flow drum mixers was the original counter-flow drum mixer and has been proven over many decades. Combustion Zone.
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Feb 28, 2015 · Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone Patent number: 5664881 Abstract: A drum mixer is provided with a rotatable cylinder in which aggregates, reclaimed asphalt pavement and liquid asphalt are …
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asphalt plants in the United States. Of these 3,600 plants, approximately 2,300 are batch plants, 1,000 are parallel flow drum mix plants, and 300 are counterflow drum mix plants. The total 1996 HMA production from batch and drum mix plants is estimated at about 240 million tons and 260 million tons, respectively.
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The shell temperature of an uninsulated counter-flow dryer will range anywhere from less than 300⁰F at the ends (virgin aggregate feed breeching, and mix discharge to the finished product, or slat, conveyor) to perhaps more than 600⁰F in proximity to the combustion zone.
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More specifically, this invention relates to a counter-flow asphalt plant having a recycle asphalt (RAP) feed to the combustion zone to produce high percentage RAP asphalt products within a two
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