The following are the detailed steps for handling the deviation fault of 
quartz sand conveyor belt:

Shutdown and ensure safety
Immediately stop the conveyor belt operation, cut off the power supply, 
ensure the safety of the operating area, and avoid personal injury.
preliminary inspection
Observe the overall operation of the conveyor belt and confirm the severity 
of the deviation phenomenon.
Check if there is any obvious physical damage to the conveyor belt, such as 
belt cracks, fractures, or wear.
Check the guiding device
Check whether the guide roller and side guide roller are symmetrical, firmly 
installed, and whether there is wear or deformation.
Confirm if the guiding device is adjusted properly, improper adjustment may 
cause the belt to deviate from the center.
Check the tension of the belt
Check if the belt tension is appropriate: too loose can cause the belt to 
deviate, while too tight may accelerate wear.
Adjust the tension device according to the equipment manual to ensure that 
the belt is in the appropriate tension state.
Check the support frame and installation position
Check if the support frame of the conveyor belt is stable, loose or 
deformed.
Ensure that the conveyor belt is installed smoothly and without tilting.
Adjust direction and position
According to the inspection results, adjust the position of the guide drum or 
side guide device appropriately to keep the belt running in the center 
position.
If necessary, the position of the belt in the guide device can be manually 
adjusted to ensure smooth operation.
Replace damaged components
For components found to be severely worn or damaged (such as guide rollers, 
belts, support frames, etc.), replace them in a timely manner to ensure the 
normal operation of the equipment.
Trial operation testing
After adjusting and replacing the components, restart the conveyor belt and 
observe its operating status.
Monitor whether the belt still deviates and ensure that the adjustment 
achieves the expected effect.
Recording and preventive measures
Record the cause, handling process, and results of deviation faults, and 
establish maintenance records.
Develop preventive measures based on the cause of the malfunction, such as 
regular inspection of the guiding device, adjustment of belt tension, 
maintenance of the support frame, etc., to prevent similar problems from 
happening again.
Through the above steps, the problem of quartz sand conveyor belt deviation 
can be effectively solved, ensuring stable operation of the production line and 
improving the service life of the equipment.