Simple Solutions That Work! Issue 12

depending on resin system, metal poured, sand:metal ratio, etc. • Do not need to cool their sand prior to leaving the reclamation system • Have few, if any, chills in their molds Shakeout Deck Attrition Mill Com- bination units are available in deck sizes of 3’, 4’, 5’, 6’, and 7’ square. Generally, the maximum mold should be at least 1’ smaller than the size of the deck. Optional Upgrades to basic me- chanical systems: • Magnetic Separation • Additional Agglomerate Screeners • Upgrade to a Cooler Classifier to allow sand to be cooled • High Temperature Air Driven Elevators to allow for sand temps above 300-400°F After the classifier, the sand will generally need directed to a differ- ent silo for bulk storage, or back to a daytank for point of use storage. In either case, as there is generally horizontal distance between the classifier and this storage location, a pneumatic transporter is an ex- cellent way to move the sand to its destination. There are times when a foundry may need a system that has more capability than a basic system. Some examples may be: • Large throughput amounts or very large molds • High temperature of shakeout • The desire for automatic chill removal from the sand stream • Fragile castings that require a modulated shakeout In these cases, it is very common to change from a shakeout deck/ attrition mill combination unit over to a system that has separate piec- es of equipment for shakeout and attrition, as well as often having vibratory lift devices to elevate chunks of sand. As always, it is best to work with your supplier giving a full scope of the reclamation work that needs to be done, including both the odd size pieces, as well as the bulk sizes that cover 90% of your production. With this information, a system can be designed that will meet the environmental desires, the simplicity of use, and the finan- cial savings that help to make sand reclamation the right choice. 33 Thermal Reclamation System Types • Electric – For small applications up to around 600 pounds per hour, which is roughly equal to a truckload of sand per week • Gas-fired – For larger applications - Typically either a fluid bed style or a rotating calciner Mechanical Reclamation System Offerings A basic mechanical system in- cludes: • Shakeout Deck / Attrition Mill Combination Unit • Bucket Elevator • Surge Silo/Hopper (suggested) • Classifier without cooling • Control Panel for All Above Items A basic mechanical reclamation system is a good choice for found- ries who: • Shakeout when sand is 250°F or lower • Have throughput requirements not exceeding 6-8 TPH BACK TO BASICS Contact: JACK PALMER jack@palmermfg.com