Sink-Float tank

With recycling plastics, one of the plastic separation techniques is applying a sink-float tank, otherwise also referred to as a float-sink tank. The tank is filled with water and, depending on the materials to be separated, additives to alter the fluid’s density.

The mixed plastic stream is dosed into the tank where high-density materials will sink, and low-density materials will float. The separated particles will be recovered and conveyed for further processing.

An innovative float-sink tank installation built by B+B offers advantages including:

• applicable for multiple types of plastics, e.g. PET, PP/PE, and PS/ABS
• high selectivity through basic principle of gravity separation
• automatic level adjustment via pressure gauging
• cost-effective thanks to low operational costs (low maintenance and wear) and low energy consumption