The practice of using a float tank for separation of light materials from heavier materials has been common for many years. However, there are many problems associated with water based separation.

One problem is the time and cost of maintenance. When waste enters the tank, residue is released into the water, creating a slurry that may contain contaminants that can not just be dumped down the drain. Within the water tank, there is also typically a chain or belt conveyor which can corrode, jam, or break, causing unnecessary downtime for repair.

Another problem arises once the material leaves the tank. Wet material is significantly harder to handle, as it is heavier and tends to stick to conveying and machinery surfaces.

Air classification is a clean and efficient alternative to classification with water. The solution works through the combination of high volume, low pressure air and vibratory movement. The air forces the light material
over an opening in the bottom of the unit, allowing the heavies to fall out. This method leaves you with precise separation without the high maintenance cost or mess associated with the float tank.

GK Air Classification Equipment:

• Single Knife DE-STONER® Air Classifier
• Dual Knife DE-STONER® Air Classifier