Why Thermally Reclaim?
Today’s modern foundry is under increasing pressure not only to reduce costs but to reduce its impact on the environment, whilst at the same time improve and maintain it’s casting quality.
One of the ways of meeting these requirements is to invest in sand reclamation. Whilst most foundries now have mechanical reclamation, many are looking to further reduce costs and invest in Thermal reclamation to get as close to 100% reuse levels as possible.
Thermal Reclamation Applications
In the thermal processing of sand, a 100% of all binder and other organic materials are removed by oxidation. Firstly, the sand from the mechanical reclamation plant will pass through a cleaning tower which basically removes any metallic particles prior to entry into the furnace. The furnace itself is a fluidised bed design with a gas and air mixture providing the fluidising medium and igniting on the sand bed surface via pilot gas nozzles. Typically, a Thermal unit will run on natural gas or LPG and operate at temperatures of between 670C and 720C depending on the type of binder used.
In most cases sizing of the thermal will equate to the amount of new sand purchased by the foundry per week which is then divided by 5 days and 24 hours which equates to the continuous operation of the thermal unit and is run on a ‘campaign’ rather than switching off and on frequently which is less efficient.
Read more: THERMAL SAND RECLAMATION FOR ALL FOUNDRIES
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