| 摘要 |
<p>The method for operating a hearth furnace for melting a metal-containing material, where the hearth furnace has a furnace chamber (4) that is heated by burners (5), comprises introducing the metal-containing material into the hearth furnace, melting the metal-containing material in a first melting phase until it forms a melting bath surface, melting the metal-containing material in a second melting phase after the formation of the melt bath surface, and removing and/or retaining the molten material. One of the burners is operated during the first melting phase. The method for operating a hearth furnace for melting a metal-containing material, where the hearth furnace has a furnace chamber (4) that is heated by burners (5), comprises introducing the metal-containing material into the hearth furnace, melting the metal-containing material in a first melting phase until it forms a melting bath surface, melting the metal-containing material in a second melting phase after the formation of the melt bath surface, and removing and/or retaining the molten material. One of the burners is operated during the first melting phase, so that a high portion of the burner capacity is delivered in the form of convection than in the form of radiation energy and the respective portions of the convection heat and radiant heat, which delivers to the burner, are targetedly adjusted by adjusting the brightness and/or parameter such as length and the flame of the burner. A loading chamber upstream to the furnace chamber is provided with a pumping device, where the loading chamber is unheated or is heated over the burner. The burners are operated with air as oxidizing agent. One of the burners is operated during the second melting phase, so that the high portion of the burner capacity is delivered in the form of radiation energy than in the form of convection. The flame of the burner is variably adjusted from each other with respect to its brightness and/or parameter for the first melting phase and the second melting phase. The burner is technically operated with pure oxygen. A part of the furnace gases is circulated for increasing the convection in the furnace chamber. The brightness and/or parameter of the flame are regulated by one of the burners independent of the temperature of the melting bath. The brightness of the flame is measured over a UV-probe (10). The operating parameter of the burner is detected and evaluated. The melting process is controllably, regulatably, optimally and automatically operated, where the operating parameter detected by the electronics is accessed as input parameters.</p> |
