POT FURNACE BM-Piaf

The com­bus­tion air is pre­heated in a heat-radi­at­ing steel recu­per­a­tor up to a tem­per­a­ture of 350°C, and then it is heated further in a special elec­tri­cally-heated box up to 1000°C (such a tem­per­a­ture is mostly used for heating up pot fur­naces to its oper­a­tional tem­per­a­ture prior to light­ing the burner). Under stan­dard oper­a­tional pro­ce­dures, the tem­per­a­ture of the pre-heated air ranges from 650°C to 700°C. It means the tem­per­a­ture of the burner is always above the igni­tion tem­per­a­ture of natural gas.
The steel furnace struc­ture carries a special refrac­tory con­crete skele­ton, in the low section of which there is a natural gas com­bus­tion chamber; the exhaust gases stream up, flow around the pot, are dis­charged to the cupola booth over the pot, and enter the recu­per­a­tor. The working area of the pot furnace is sep­a­rated from the exhaust gases area by a refrac­tory con­crete box that opens into the furnace port. The refrac­tory con­crete skele­ton can house pots up to a stan­dard size of 60 x 60 and a volume of 85 liters, which rep­re­sents approx­i­mately 240 kg of lead crystal. Both elec­tric and gas heating is con­trolled and reg­u­lated with pro­gram­ma­ble auto­matic units.
Prac­ti­cal expe­ri­ence shows that the natural gas con­sump­tion is up to 5 Nm³/hour. An effi­cient con­sump­tion such as this can be achieved due to a unique system of com­bus­tion gas heating and to abun­dant insu­la­tion of the whole set with fibrous insu­la­tion mate­ri­als. The surface tem­per­a­ture of the steel sheet furnace body­work does not exceed 100°C.