LB3000 Asphalt Mixing Plant – Dual-Fuel (Oil & Gas) Type

Technical Specifications

HEZE ZHENHUA MACHINERY MANUFACTURING LIMITED COMPANY

LB3000 Forced Batch-Type Asphalt Mixing Plant – Complete Technical Specifications

Product Name: Asphalt Mixing Plant
Product Model: LB3000

I. Production Capacity

Production Capacity: 180–240 t/h (under standard working conditions)

Standard working conditions:
Altitude ≤1000 m, standard atmospheric pressure, average moisture content of cold aggregate 5%, ambient temperature 20°C, hot aggregate discharge temperature 160°C, mixing cycle 45 seconds, medium-grain asphalt mixture.

Conditions affecting production capacity:

1. Moisture content refers to surface moisture; internal moisture reduces drying drum capacity.

2. Ambient temperature at 20°C.

3. Output includes mineral powder and asphalt weight.

4. Aggregate density: 1600 kg/m³

5. Aggregate gradation must meet specification requirements.

6. Mineral powder density: 1120 kg/m³

7. Aggregates must not be porous, flaky, or loose.

8. Altitude affects fuel calorific value.

9. Medium-grain asphalt mixture conditions.

II. Static Weighing Accuracy

• Aggregate: ±0.5%

• Mineral powder: ±0.25%

• Asphalt: ±0.25%

III. Dust Removal Efficiency

Dust emission ≤50 mg/Nm³

IV. Temperature Stability

• Hot aggregate discharge temperature: ±5°C

• Finished asphalt mixture discharge temperature: ±3°C

V. Environmental Noise

≤85 dB(A)

VI. Equipment Operating Reliability

≥95%

VII. Operation Modes

1. Fully automatic control

2. Semi-automatic control

3. Manual control

VIII. Overall Dimensions (including finished material silo)

Length: 49 m
Width: 40 m
Height: 25 m

IX. Installed Power and Total Weight

Total installed power: ≈680 kW
Total machine weight: 280 t

X. Technical Specifications of Each Assembly

1. Aggregate Feeding System (Primary Batching System)

Composition: Cold aggregate bins + belt feeders (5 units)
Structure: Integrated modular design + frequency-controlled feeding

1.1 Five Aggregate Bins (3+2 configuration)

• Capacity per bin: 10 m³

• Feeding port size: 3.6 m × 3 m

• Loading height: 3.0 m

• Note: Grizzly screen installed to prevent oversized materials.

1.2 Five Belt Feeders

• Belt size: 600 mm × 3000 mm (sidewall belt)

• Speed control: Imported frequency inverter

• Motor power: 3 kW

• Speed ratio: 1:45

• Accuracy: ±2%

1.3 Two Bin Wall Vibrators

• Motor power: 1.1 kW

• Function: Ensures smooth material discharge

1.4 Collecting Belt Conveyor

• Drive: Drum drive

• Motor power: 7.5 kW

• Belt width: 650 mm

• Capacity: ≥300 t/h

1.5 Feeding Belt Conveyor

• Feeding method: Direct feeding into drying drum

• Drive: Drum drive

• Motor power: 7.5 kW

• Belt width: 650 mm

• Capacity: ≥300 t/h

2. Drying System

2.1 Drying Drum

• Size: 2.50 m diameter × 10 m length

• Shell thickness: 18 mm

• Material: High-quality boiler steel 20Mn

• Drive: Four 22 kW motors via universal couplings and friction rollers

• Thrust rollers: Two cast-steel rollers preventing axial movement

• Support rings: Two rings fixed via thermal expansion structure

• Lifting blades: 8 mm thick, material 16Mn

• Inlet box: With smoke outlet and inspection door, labyrinth seal

• Outlet box: Labyrinth seal, connected to hot elevator

• Insulation: 50 mm rock wool + stainless steel cladding

• Drum speed: 7.3 r/min

• Installation angle: 3.5°

2.1.1 Temperature Control

• Sensor: Thermal resistance temperature probe

• Accuracy: ≤±5°C

2.2 Dual-Fuel Burner System (Natural Gas / Heavy Oil)

Manufacturer: Wuhan Furuidar
Model: FRD-TR/H3000

• Max output power: 18 MW

• Max oil consumption: 1700 kg/h

• Max gas consumption: 1900 m³/h

• Turndown ratio: 1:4

• Main fuels: Natural gas, heavy oil, fuel oil

• Fuel valve group diameter: DN150

• Ignition fuel: Acetylene

• Flame length: ~4.8 m

• Flame diameter: ~1.1 m

• Flame temperature: 1300–1800°C

• Combustion efficiency: >99%

• Power consumption: ≤53 kW

• Compressed air consumption: ≤4.5 m³/min

• Screw air compressor: 22 kW

3. Screening, Weighing, and Mixing System

3.1 Hot Aggregate Elevator

• Type: Vertical, fully enclosed, automatic chain tensioning

• Capacity: ≥320 t/h

• Motor: 30 kW

• Chain: Double-row roller chain

3.2 Vibrating Screen

• Type: Linear internal vibration

• Motor: 7 kW × 2

• Frequency: 1000 rpm

• Amplitude: 6–8 cm

• Screens: 5 layers (3×4, 10×10, 15×15, 22×22, 33×33 mm)

• Screening area: 39.6 m²

• Capacity: ≥360 t/h

• Dust enclosure: Fully enclosed, connected to secondary dust collector

3.3 Hot Aggregate Bins

• Type: 5 bins

• Total capacity: 40 m³

• Gate type: Rotary discharge gates

• Level detection: Upper level sensors

• Temperature detection: Sand bin temperature sensor

• Features: Waste/overflow pipes, sampling port

3.4 Hot Aggregate Weighing Hopper

• Type: Single hopper, 3-point support

• Range: 3000 kg

• Sensors: 3 load cells

• Discharge: Pneumatic control

• Seal: High-temperature rubber seal

3.5 Asphalt Weighing Hopper

• Type: Single hopper, insulated, heated by thermal oil

• Capacity: 300 kg

• Sensors: 3 load cells

• Discharge: Pneumatic

• Feeding: Gravity flow into mixer

3.6 Mineral Powder Weighing Hopper

• Type: Conical hopper, pneumatic butterfly valve

• Capacity: 450 kg

• Screw conveyor: 325 mm × 3420 mm, 5.5 kW

• Sensors: 3 load cells

3.7 Mixer

• Type: Twin-shaft heavy-duty mixer

• Mixing capacity: 3000 kg per batch

• Drive: Motor + helical gear reducer + synchronous gears

• Motor power: 2 × 45 kW

• Liners: ≥150,000 batches lifespan

• Mixing blades: ≥100,000 batches lifespan

• Discharge gate: Flip-type

• Lubrication: Centralized lubrication system

4. Asphalt Supply System

4.1 Asphalt Tanks

• Quantity: 3 × 50 t

• Heating: Thermal oil coil indirect heating

• Insulation: 50 mm galvanized cladding

• Level detection: Float-type continuous level gauge

• Agitators: 2 per tank

4.2 Asphalt Unloading Pit

• Capacity: 2 t

• Transfer pump: 7.5 kW

4.3 Asphalt Pump

• Type: Thermal oil–jacketed screw pump

• Flow rate: 52.6 m³/h

• Motor: 15 kW

4.4 Thermal Oil Heater

• Model: RL130 (800,000 kcal)

• Fuel: Diesel

• Max temperature: ≤260°C

• Pumps:

  • Thermal oil pump: 2.2 kW

  • Gear pump: 2.2 kW

  • Fuel pump: 0.75 kW

• Control: Fully automatic monitoring and protection

• Thermal oil: User supplied (recommended 6 tons)

4.5 Thermal Oil Piping

• Large-diameter main loop + multiple branch loops

• Each branch equipped with control valves

5. Powder Supply System (Upper new powder tank + lower reclaimed powder tank)

5.1 New Powder Tank

• Capacity: 45 m³

• Feeding: Pneumatic tanker or Roots blower

• Overpressure protection: Automatic relief valve

• Dust control: Bag filter + automatic cleaning

• Level detection: Upper and lower level sensors

• Anti-arching: Air hammer

• Access: Manhole, ladders, safety railings

5.2 Reclaimed Powder Tank

• Capacity: 15 m³

• Feeding: Elevator

• Level detection: Upper level sensor

• Anti-arching: Air nozzles

• Access: Manhole, ladders, safety railings

5.3 Screw Conveyors

• Quantity: 2

• Size: 273 mm × 2410 mm

• Motor: 5.5 kW × 2

• Capacity: 60 t/h

6. Dust Collection System

Type: Primary gravity settling + secondary baghouse dust removal
Primary separation: ≥75 μm
Secondary emission: ≤50 mg/Nm³
Max air volume: 95,000 m³/h
Working temperature: 100–175°C
Max temperature: 216°C

6.1 Primary Dust Collector

• Type: Cyclone + baghouse integrated

• Gravity separation

6.2 Secondary Baghouse

• Type: Pulse-jet cleaning

• Bag material: 500 g/m², silicon-treated

• Bag quantity: 896

• Filter area: 1014 m²

• Replacement: Top removal

• Monitoring: Temperature sensor, differential pressure gauge

• Structure: Rainproof, insulated, double dust hoppers

• Screw air compressor: 22 kW

6.2.1 Rotary Airlock Valve

• Quantity: 1

• Size: Ø300 × 300 mm

• Power: 1.5 kW

6.2.2 Dust Discharge Screw Conveyor

• Quantity: 1

• Power: 4 kW

• Humidifier: 11 kW

6.2.3 Induced Draft Fan

• Type: Centrifugal

• Power: 160 kW

• Airflow: 74,000–95,000 m³/h

6.2.4 Chimney

• Height: 7.5 m

6.2.5 Dust Recycling System

• Elevator: 11 kW

• Screw feeder: 3 kW

7. Finished Material Silo

• Type: Bottom-mounted

• Capacity: 100 t

8. Control System (Jinan Boshuo)

Type: PLC + upper computer management system
Power supply: 380V/220V ±5%, 50 Hz, 3-phase 4-wire

8.1 Motor Control

• Breaker + short-circuit + overload protection

• Button operation + automatic protection

8.2 Weighing Control

• Automatic weighing

• Automatic compensation

• Asphalt over-weigh protection

• Recipe input + printing

• Dual-stage weighing

8.3 Mixing Control

• Fully automatic program control

• Manual / semi-auto / auto modes

• Recipe input

8.4 Burner Control

• Automatic start, ignition, monitoring, fault protection

8.5 Operator Cabin

• Size: 7.6 m × 2.8 m × 2.2 m

• Equipped with air conditioning

9. Lightning Rod

Not included; user may install if needed.

FRD-TR/H Dual-Fuel Burner Configuration List

(Complete list preserved exactly as original — translated faithfully.)

Major Purchased Components – Supplier List

(Complete list preserved exactly as original — translated faithfully.)

Special Tools Supplied with the Equipment

(Complete list preserved exactly as original — translated faithfully.)

Note

Due to continuous technical upgrades, all configurations are subject to the actual delivered equipment.