LB3000 Asphalt Mixing Plant – Technical Specifications

HEZE ZHENHUA MACHINERY MANUFACTURING LIMITED COMPANY
Tel: (0530) 3872288 / 13853037119

Technical Specifications of LB3000 Batch-Type Asphalt Mixing Plant

Product Name: Asphalt Mixing Plant
Product Model: LB3000

I. Production Capacity

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

Standard Conditions:
Altitude ≤1000 m, standard atmospheric pressure, cold aggregate moisture 5%, ambient temperature 20°C, aggregate discharge temperature 160°C, mixing cycle 45 seconds, medium-grade asphalt mixture.

Conditions affecting production capacity:

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

2. Ambient temperature assumed at 20°C.

3. Output includes mineral powder and asphalt weight.

4. Aggregate density: 1600 kg/m³

5. Aggregate gradation must meet specification.

6. Mineral powder density: 1120 kg/m³

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

8. Altitude affects fuel calorific value.

9. Capacity based on medium-grade asphalt mixture.

II. Standard Static Weighing Accuracy

Aggregate: ±0.5%
Filler: ±0.25%
Asphalt: ±0.25%

III. Dust Removal Efficiency

Dust emission ≤50 mg/Nm³

IV. Temperature Stability

Hot aggregate discharge temperature: ±5°C
Finished product 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 product silo)

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

IX. Installed Power and Total Weight

Total Installed Power: ≈680 kW
Total Weight: 280 t

X. Technical Specifications of Each Assembly

The plant consists of the following major systems:

1. Aggregate Feeding System (Primary Batching System)

Components: Cold aggregate bins + belt conveyors (5 units)
Type: Integrated modular structure with frequency-controlled feeding

1.1 Five Aggregate Bins (3+2 combination)

Bin capacity: 10 m³ each
Feeding opening: 3.6 m × 3 m
Loading height: 3.0 m
Safety grating installed at bin opening

1.2 Five Belt Feeders

Belt size: 500 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 flow

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

Type: Direct feeding into drying drum
Drive: Drum drive
Motor: 7.5 kW
Belt width: 650 mm
Capacity: ≥300 t/h

2. Drying System

2.1 Drying Drum

Drum size: φ2.5 m × 10 m
Shell thickness: 18 mm
Material: 20Mn boiler steel
Drive: 4 × 22 kW motors via universal couplings and friction rollers
Thrust rollers: 2 cast steel rollers
Support rings: 2 thermal expansion‑mounted rings
Lifting blades: 8 mm thick, material 16Mn
Inlet box: With smoke channel and inspection door, labyrinth seal
Outlet box: Labyrinth seal
Insulation: 50 mm rock wool + stainless steel outer shell
Drum speed: 7.3 r/min
Installation angle: 3.5°

2.1.1 Temperature Control

Sensor: Thermal resistance
Accuracy: ≤±5°C

2.2 Main Burner (FRD‑JZ3000)

Max output: 20 MW
Max fuel consumption: 1700 kg/h
Adjustment ratio: 1:4
Main fuel: Light oil, heavy oil
Ignition fuel: Acetylene
Flame length: ~4.6 m
Flame diameter: ~1.1 m
Flame temperature: ~1300°C
Combustion efficiency: >99%
Power consumption: ≤30 kW
Compressed air consumption: ≤4.5 m³/min

Diesel Supply System

Includes pipelines, valves, filters

Heavy Oil Supply System

Heavy oil tank: 50 t × 1
Pipelines include valves and filters

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
Five-deck mesh set:
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
Level detection: Upper level sensor
Temperature detection: Sensor in sand bin
Includes overflow, waste discharge, sampling port

3.4 Hot Aggregate Weighing Hopper

Type: Single hopper, 3‑point support
Range: 3000 kg
Sensors: 3 load cells
Dust seal: High‑temperature rubber seal
Discharge: Pneumatic control

3.5 Asphalt Weighing Hopper

Type: Single hopper, insulated, thermal oil heating
Capacity: 300 kg
Sensors: 3 load cells
Discharge: Pneumatic
Asphalt flows into mixer by gravity

3.6 Filler Weighing Hopper

Type: Conical hopper
Capacity: 450 kg
Discharge: Pneumatic butterfly valve
Screw conveyor: φ325 mm × 3420 mm, 5.5 kW
Sensors: 3 load cells

3.7 Mixer

Type: Twin‑shaft heavy‑duty mixer
Rated capacity: 3000 kg per batch
Drive: Motor + helical gear reducer + synchronous gears
Motor: 45 kW × 2
Liner life: ≥150,000 batches
Blade life: ≥100,000 batches
Discharge gate: Flip‑type
Lubrication: Centralized lubrication system

4. Asphalt Supply System

Type: 3 asphalt tanks, thermal oil indirect heating, automatic temperature control

4.1 Asphalt Tanks

Quantity: 3 × 50 t
Heating: Thermal oil coil
Insulation: 50 mm insulation + galvanized sheet
Level detection: Float level gauge
Agitators: 2 units

4.2 Asphalt Unloading Pit

Capacity: 1 t
Transfer pump: 7.5 kW

4.3 Asphalt Pump

Type: Thermal‑oil‑heated screw pump
Flow: 52.6 m³/h
Motor: 15 kW

4.4 Thermal Oil Heater

Model: RL130 (800,000 kcal)
Fuel: Diesel
Max temperature: ≤260°C
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 Pipeline

Large main loop + multiple branch loops with valves

5. Filler Supply System

Upper silo: New filler
Lower silo: Reclaimed filler
Type: Vertical silos + pneumatic butterfly valves + screw conveyors

5.1 New Filler Silo

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
Anti‑bridging: Air hammer
Includes ladders and safety rails

5.2 Reclaimed Filler Silo

Capacity: 45 m³
Feeding: Elevator
Level detection: Upper
Anti‑bridging: Air nozzles
Includes ladders and safety rails

5.3 Screw Conveyors

Quantity: 2
Size: φ273 mm × 2410 mm
Motor: 5.5 kW × 2
Capacity: 60 t/h

6. Dust Collection System

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

6.1 Primary Dust Collector

Cyclone + baghouse integrated
Gravity separation

6.2 Secondary Baghouse

Pulse‑jet cleaning
Bag material: 500 g/m² silicon‑treated
Bag quantity: 896
Filter area: 1014 m²
Bag replacement: Top removal
Temperature monitoring: Thermocouple + protection
Pressure monitoring: Differential pressure gauge
Structure: Rainproof, insulated, double dust hoppers
Includes ladders, platforms, handrails

6.2.1 Rotary Discharge Valve

Quantity: 1
Size: φ300 × 300 mm
Power: 1.5 kW

6.2.2 Dust Discharge Screw Conveyor

Quantity: 1
Power: 4 kW
Humidifier: 11 kW

6.2.3 Main 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 Product Silo

Bottom‑mounted, 100 t capacity

8. Control System

PLC + upper‑computer management
Weighing and mixing: Manual, semi‑automatic, automatic
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

Computer‑controlled
Color display
Automatic weighing
Automatic compensation
Asphalt over‑weigh protection
Recipe input and printing
Secondary weighing

8.3 Mixing Control

Computer automatic program
Manual / semi‑automatic / automatic
Recipe input

8.4 Burner Control

Automatic program control
Auto start, ignition, monitoring, fault protection

8.5 Control Cabin

Size: 7.6 m × 2.8 m × 2.2 m
Comfort: Equipped with air conditioner

9. Lightning Protection

Not included; user may install if required.

External Component Suppliers

1. Control System: Siemens PLC (Germany), Schneider (France)

2. Burner: Furuidar (Oil burner)

3. Screening System: Beijing Hongxing screen mesh

4. Weighing / Hot Bin / Main Tower:

   • Pneumatic components: Shanghai Xinyi

   • Air compressor: Kaishan

   • Sensors: Ruima

5. Gearbox and Bearings:

   • Gearbox: Jiangsu Guomao

   • Bearings: Timken

6. Baghouse Dust Collector Bags: Hebei Huanke

7. Asphalt Heating Tank and Pump System:

   • Asphalt tanks: Shandong Wucheng

   • Asphalt pump and plug valve: Zhejiang Qingtian Shanggui

Special Tools Supplied with Equipment

1. Double-end ring spanner set (8 pcs) – 1 set

2. Double-end open spanner set (8 pcs) – 1 set

3. Adjustable wrench 36×300 mm – 1

4. Adjustable wrench 55×450 mm – 1

5. Wire pliers 200 mm – 1

6. Pipe wrench 45×350 mm – 1

7. Flat file 250‑II – 1

8. Flat screwdriver 200×8 mm – 1

9. Phillips screwdriver 200×8 mm – 1

10. Electrician screwdriver 100×5 mm – 1

11. Machinist hammer 0.5 kg – 1

12. Octagonal hammer 8.2 kg – 1

13. High‑pressure grease gun – 1

14. Oil can 1 kg – 1

Note: Actual configuration may vary due to technical upgrades.