| 摘要 |
<p>Method to feed tuyères in an electric furnace, the tuyères comprising a central conduit to deliver a comburent gassy substance and a peripheral conduit to deliver a cooling gassy substance, the method providing to send to the central conduit a comburent mixture consisting of oxygen and neutral gas (N2, Ar, etc.) in defined percentages, the oxygen and the neutral gas being fed, for each of the tuyères, to a mixing device (13) with a high mixing capacity, at least the pressure of the neutral gas being able to be adjusted on the relative feed line so as to modulate the pressure of the mixture according to the characteristics of the melting process. Device to feed a comburent gassy substance to a tuyère for an electric furnace, the device comprising at least a line to feed oxygen and at least a line to feed neutral gas, the two lines being connected downstream to a mixing device (13) with a high mixing capacity, arranged immediately upstream of the relative tuyère, each of the lines comprising at least means to modulate and/or stabilise the pressure of delivery.</p> |
