Gas burners are operated as normal burners with air, or as high-performance burners using oxygen. Depending on the size of the crucible, holding, storage or channel furnace, outputs of from 100 to 500 kW are used, and more rarely 750 kW. The application temperatures to the ceramics range from 800 °C to 1,200 °C. The flame temperatures are considerably higher, and can reach levels of up to approx. 2,400 °C.
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