Thermo Drum Unit (Drum Mix Plant)

Overview And Working of Thermo Drum Unit

• Thermo Drum Unit is a Cylindrical shaped dryer drum supported on 4-trunnion rollers by 2 steel tyres is driven by a chain & wormgear box & an AC motor. It receives weighed cold aggregates from slinger conveyor at one end & discharges hot asphalt mix on to a load out conveyor from other end. Wet aggregates is heated and dryed using a high pressure jet burner fitted at feeding end which fires high temprature flame into the drum. Sweep rotor discharges hot mix material on to load out conveyor where a thermocouple is mounted on discharge chute to measure mix material temperature
• Maximum heat transfer from flame and hot gases to aggregates is achieved by specially designed cascading and notched flights in heating zone. Inside the drum, Spray cone fitted on bitumen and filler pipeline mixes powder filler with liquid bitumen first to make slurry then, further mixes with aggregates to prevent blow-out of fine fillerin to exhaust.
• Steel-cast thrust wheels prevent drum from slowly moving down-ward while running under load. Minimum thrust force can be achived on thrust wheels via adjusting Skewable trunnion rollers to run drum smooth with minimum wear. 2-dam plates inside drum allows longer heating & mixing time to aggregates thus, help to produce super quality of mix.