POT FURNACE BM-PIAF A single-pot furnace, has a unique design in order to use the input energy as much as possible. 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. A single-pot furnace, has a unique design in order to use the input energy as much as possible. Average consumption per hour when operated with a 50x50 pot is up to 5 Nm3 of natural gas and up to 6kWh of electric energy.

Height (including the recuperator) Width Depth Total weight with no melted glass Max. melting temperature (measured at the outside surface of the pot) Temperature of the exhaust at the recuperator outlet Main electric motor Connection requirements: natural gas pressure electric network 380 V / 32 A TECHNICAL DATA www.bohemia-machine.cz