The low classification efficiency of spiral classifiers can prevent effective
separation of coarse and fine quartz sand particles, affecting the feed quality
of subsequent processes. These optimization methods can effectively improve
this.
Firstly, adjust the spiral speed. If the speed is too fast, the slurry will
stay in the tank for too short a time, and the coarse and fine particles will be
discharged before they can be separated. If the speed is too slow, it will
reduce the classification efficiency. Adjust the speed reasonably according to
the ore particle size.
Secondly, adjust the height of the overflow weir. If the overflow weir is too
high, coarse particles will mix into the overflow, resulting in a decrease in
classification accuracy. If the overflow weir is too low, fine particles will be
discharged with the settling sand, causing mineral loss. Adjust the overflow
weir to a suitable height to ensure classification accuracy.
Then control the slurry concentration. If the slurry concentration is too
high, the particle settling speed will slow down and the grading effect will
deteriorate. If the concentration is too low, the grading efficiency will be
reduced. Control the slurry concentration within a reasonable range.
Finally, regularly clean the spiral blades and tank body, promptly remove
attached mineral mud and accumulated materials, avoid blocking the flow channel,
ensure smooth flow of slurry, and improve the grading effect.
Proper parameter adjustment and equipment maintenance can effectively improve
the grading efficiency of the spiral classifier and ensure the grading effect of
quartz sand.