Product Knowledge

Fault and Solution of Sand Sprial Classifier

author:dahua time:2018-10-05

In this text, we will talk about the fault and solution of sand spiral classifier.


※ Motor current is unstable or too high

Reason: 1. Sand return is increased. 2. Feeding concentration is too high. 3. The steel ball discharged by ore pulp from ball mill is increased. 4. V belt is too tight.

Solution: 1. Reduce sand return or feeding concentration. 2. Clear the steel ball in time. 3. Adjust V belt. It is advisable to be pressed down 10-15mm. 


※ Processing capacity is decreased

Reason: 1. Big tilt angle of trough body causes grading area decreased. 2. Pulp density is too low.

Solution: 1. Reduce tilt angle. 2. Adjust the pulp density.


※ Grading precision becomes low

Reason:1. The overflow weir is not high enough. 2. Slurry concentration is too high or too low.

Solution: 1. Adjust the plate height. 2. Adjust to proper slurry concentration.


※ Cannot form sand return or sand return amount is reduced

Reason: 1. Spiral blade is worn. 2. Spiral rotation speed is too low.

Solution: 1. Replace a new spiral blade. 2. Adjust the rotation speed.


※ Vibration of classifier, gear drive with a crash or sudden strong vibration

Reason: 1. Gear engagement is bad or worn too much. 2. Drive bearing wear out too much. 3. Insufficient lubrication.

Solution: 1. Adjust gear clearance or replace a new one. 2. Replace bearing. 3. Add sufficient lubrication oil.


Luoyang Dahua sand classifier has single spiral and double spiral to be selected. The products are exported to Thailand, Indonesia, Congo, Russia and more than 15 countries. For more information, please contact or Skype: Crusher Dahua