SOLUTIONS

The use of cupola furnaces for cast iron formation generates a considerable flow of fumes at very high temperatures (~1,000°C).
This requires the use of noble materials, such as AISI 310 10mm steel for building smokestacks over cupola furnaces, AISI 304 and lastly Corten, as heat disperses along the fume duct. All this can be integrated with couplings complete with bolster bag.
The pre-abatement of large and incandescent particles occurs in high performance cyclones in cascade along an air/air heat exchanger which consists of tubes/plates along which the high temperature polluted flow is directed, coming into contact on outer edges with a forced cold air current. A special cleaning system maintains exchanger efficiency.
Once temperature is reduced to below 200 -220°C, the flow is sent to a Pulse Jet filter with teflon coated aramid bags. The entire system is supervised via PLC with supervision.
For electric furnace connection we have developed a special toggle plug which ensures furnace aspiration during all operation phases, whereas mobile arms are used during ancillary operations (such as spheroidisation). Temperatures here are much lower than those in the previous point, so the flow can be sent directly to the bag filter. Airflow is variable according to furnace operation and therefore it is managed by a frequency converter, thus guaranteeing energy savings.