Thermal Reclamation
Why Recove Thermally?
Today, modern foundries use any of the chemically-bonded sand systems, since they are under increasing pressure to reduce manufacturing costs, reduce their impact on the environment, but at the same time, improve casting quality . One of the ways to meet these requirements is to invest in the recovery of the sands. Although most foundries and have mechanical reclamations, many are trying to cut costs further and invest in thermal reclamation.
Thermal Reclamation
The purpose of the thermal reclamation is to remove 100% of the binder and other organic materials of the sand
First, the sand mechanical plant regeneration pass through a scrubber that removes the metal particles basically before entering the furnace itself is a fluidized bed design with a gas-air mixture provided by the fluidizing medium and lighting surface of the sand bed through pilot gas nozzles.
Normally, the thermal unit runs on natural gas or LPG and operates at temperatures between 670 ° C and 720 ° C depending on the type of binder used. The sizes offered within the range of thermal recuperative Omega range from 250kg /hour upto 12 Tons/hour with a 3 year warranty on burner and furnace lining.
The "Bed Dead" Omega patented system ensures total thermal insulation and therefore lower operating costs, and longer life for the ceramic fiber insulation of the furnace is due to the protection provided by the "Bed dead 'for isolation and erosion caused by the movement of sand in processing.
Low operating costs are achieved through the combination of excellent insulation furnace system with "Dead Bed", and a heat recovery module installed, which takes heat from the air leaving the hot sand reintroduces the furnace and heat to the fluid bed as hot air oven. This means that the fluidizing air is always hot, leading to a lower consumption of gas.
Security is also a major concern, so multiple security systems are used to control ignition fluid bed temperatures of all components (including dust collector) and the level of sand available for processing. In addition, a touch screen panel, complete with the status and location and fault indication is provided.
The plant emissions of heat recovery are guaranteed to be lower than the requirements of local legislation, without installing an burner later. The bell on the furnace ensures that the air coming out of it is clean.
Alkaline Phenolic system for a particular inhibitor must be pre-mixed with sand to prevent the alkali metal salts cause low melting temperature of the thermally reclaimed sand.
Now it is possible to recover heat green sand for reuse in the core making foundry. A mechanical attrition is employed, before and after the oven, to ensure that all the clay is removed, but the thermal regeneration is essentially the same as that used for the recovery of sand from the chemical molding.
Conclusion
Thermal recovery has existed for many years, but has now reached a point where it is cost effective, economical, reliable and therefore feasible for you to take into consideration most foundries.
Both from OMEGA and from our Representative / Distributor for the Spanish market, EUSKATFUND, SL, we are happy to discuss, offer and conduct the feasibility study and return on investment.
