the Stuart McElrath Company
since 1994
   
 
 

 
This standard Sand Cooler- Classifier design has been the industry standard for decades. The SCC's heat exchanger is a single-pass, counter-flow design. Air fluidization provides low wear characteristics. Fines extraction is accomplished by extraction points in the hood.
 
 
SMC | Cooler Classifiers - Standard
  Overview ASG Material Gate Casting Shakeouts Cooler Classifiers
 
The Standard Cooler-Classifier (SCC) is designed to cool hot foundry sand* for reuse in the molding process. This design also provides for the efficient removal of sand fines which are typically generated during casting shakeout. The SCC is provided with sensors to help provide process control in the sand reclamation process. Additionally, this unit has been designed for serviceability.

In operation, sand enters the cooler-classifier and is fluidized by a pressure blower with multiple inlets to the lower chamber of the fluidbed. Each inlet comes with an adjustable baffle used for adjusting the fluidbed depth. Fluidizing air then passes through a metal distributor plate and into the sand. By adjusting both the bed depth and the negative extraction pressure varying degrees of fines can be removed.
Cooler Classifier - Standard |   This cooler-classifier is fluidbed design with a single pass, counter flow heat exchanger.  
 
The SCC's heat exchanger is a single pass, counter flow design. Hot sand enters the unit falling into a fluidbed surrounding the heat exchanger. Fluidizing air gently moves the sand towards the discharge end of the cooler-classifier. As this is taking place, the fluidized sand grains are coming in contact with the cooling tubes thereby conducting heat away from the sand. Sand leaves the cooler next to the water inlet bulkhead of the heat exchanger giving the sand the lowest possible temperature before exiting the unit.

The SCC is typically used with either open or closed looped water cooling towers. At the customer’s request, a refrigerant type cooling system can be supplied with the SCC to provide lower sand temperatures of approximately 75 degrees F.

* Other granular materials can be processed by our cooler classifiers. Contact SMC for additional information.