Professional manufacturer of asphalt equipment
Common Faults in Modified Asphalt Equipment and Troubleshooting Methods
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1. Asphalt temperature is too high or cannot risePossible CausesHeating system abnormal (burner / thermal oil / electric heating)Temperature sensor failure or misalignmentInsulation layer damaged, hea
1. Asphalt temperature is too high or cannot rise
Possible Causes
Heating system abnormal (burner / thermal oil / electric heating)
Temperature sensor failure or misalignment
Insulation layer damaged, heat loss too fast
Heat conduction pipeline blocked
Troubleshooting Methods
Check heater, burner, and thermal oil circulation pump
Calibrate or replace temperature sensor
Repair or replace thermal insulation layer
Clean pipeline and remove blockage
2. Asphalt leakage at tank body or pipeline
Possible Causes
Weld cracking or flange loose
Sealing gasket aging or damaged
Pipeline corroded by high temperature
Valve stem wear
Troubleshooting Methods
Stop heating, cool down, then repair welding
Tighten flange or replace sealing gasket
Replace corroded pipe sections
Replace valve or valve seal assembly
3. Colloid mill does not discharge or low output
Possible Causes
Inlet material shortage or air lock
Rotor and stator clearance too large
Asphalt viscosity too high
Pipeline or discharge port blocked
Troubleshooting Methods
Check feeding system and supplement material
Readjust clearance between rotor and stator
Increase temperature properly to reduce viscosity
Clean blockage in pipeline and grinding chamber
4. Colloid mill abnormal noise or strong vibration
Possible Causes
Rotor and stator not concentric
Bearing damaged
Hard foreign matter entering grinding chamber
Loose anchor bolts
Troubleshooting Methods
Stop machine to adjust concentricity
Replace bearing
Open and clean grinding chamber
Tighten foundation and connecting bolts
5. Poor modification effect (uneven mixing, low stability)
Possible Causes
Insufficient mixing time or speed
Polymer feeding uneven
Colloid mill grinding effect poor
Temperature not in optimal range
Troubleshooting Methods
Extend mixing time or increase stirring speed
Adjust metering feeder for uniform feeding
Optimize grinding clearance and pressure
Control temperature within process range
6. Asphalt overflow from tank or pipeline
Possible Causes
Feeding too fast
Level control failure
Excessive agitation causing foam
Pipeline valve misoperation
Troubleshooting Methods
Reduce feeding flow
Check and calibrate level meter
Lower stirring speed or add defoaming measures
Check valve sequence and correct operation
7. Pump cannot start or weak pressure
Possible Causes
Motor fault or phase loss
Pump shaft stuck
Inlet blocked or air intake
Seal damaged
Troubleshooting Methods
Check power supply and motor
Dismantle and clean pump body
Eliminate air blockage and clean filter
Replace shaft seal
8. Automatic control system abnormal
Possible Causes
Sensor failure
Line loose or short circuit
PLC or inverter fault
Parameter setting error
Troubleshooting Methods
Check temperature, pressure, level sensors
Reconnect and fasten wiring
Check electrical control components
Reset correct process parameters
9. High energy consumption, low efficiency
Possible Causes
Poor insulation
Heating element aging
Excessive heat loss
Unreasonable process parameters
Troubleshooting Methods
Reinforce tank and pipeline insulation
Replace aging heating parts
Optimize temperature and flow settings
Reduce unnecessary heat cycle
10. Emulsification / modification system segregation
Possible Causes
Shear strength insufficient
Ratio of asphalt, water, stabilizer wrong
Temperature fluctuation too big
Short mixing time
Troubleshooting Methods
Increase colloid mill shear frequency
Recheck metering system and ratio
Stabilize heating control
Extend mixing and circulation time
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