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.
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.
Omega is pleased to offer a unique 3-year warranty on the burners and lining. This is made possible by the patented ‘Dead Bed’ system, which also ensures total heat insulation and therefore lower running costs. This is due to the ‘Dead Bed’ providing protection for the insulation from sand erosion caused by the moving processed sand.
Low running costs are achieved through a combination of the excellent insulation of the furnace with the ‘Dead Bed’ system as well as a heat recovery module after the furnace that takes the heat from the hot sand as it leaves the furnace and reintroduces that heat as hot air into the fluid bed section of the furnace. This means that the fluidising air is always hot, leading to lower gas consumption.
Read more: THERMAL SAND RECLAMATION FOR ALL FOUNDRIES
Send us a message and one of our customer service representatives will contact you soon.Contact ×