RU98101681A - METHOD OF DRYING AND HEATING OF MULTILAYER LAYING OF STEEL FILLING BUCKET - Google Patents

Claims (1)

A method of drying and heating a multilayer lining of a steel pouring ladle, including installing a ladle on a stand, covering the ladle with a lid, supplying natural gas and air to a gas-air burner, igniting it, removing flue gases and moisture from the ladle using a smoke exhauster, characterized in that the lining of the ladle subjected to a continuous-sequential, different in intensity of heat transfer and time tri-mode heating-minimum, nominal and forced burning, controlled by the coefficient of excess oki divisor torch formed homogeneously mixed gas-air mixture flowing out of the ejector multicore burner device rigidly fixed to the movable cover and immersed into the interior of the ladle to the depth H = (6 ^o C10) d _r, where d is the diameter of the outlet section _g ejector burner device, and a hot stream of combustion products of this torch, and prior to drying, the torch is ignited, the bucket lid is closed, leaving a gap of L = 50 ... 100 mm, moisture-removing multi-barrel air ejectors are installed, installed as well as a burner device on the movable lid of the bucket uniformly and symmetrically with respect to the burner device and with respect to each other in an amount of, for example, 4 ^o C6 pieces, after which the ejector burner device is put into operation in the drying mode of the lining of the bucket with an oxidant excess coefficient α $\genfrac{}{}{0ex}{}{\text{c}}{\text{OK}}$ = 3..5, the torch temperature T ^c _f = (1100 ... 300) K, the mass gas flow through the ejector burner G ^c _egu = (0.03-0.04) kg / s, the bucket lining is dried for τ _c = 5 ... 10 h with the simultaneous removal of moisture and combustion products through multi-barrel air ejectors, after which these air ejectors are turned off, their output sections are closed with shutters, the ejector burner is put into operation in the nominal mode - the mode of heating the lining of the bucket at a coefficient excess oxidant α $\genfrac{}{}{0ex}{}{\text{n}}{\text{OK}}$ = 1.05 ... 1.1, torch temperature T ⁿ _f = (2000 -... 1800) K, mass gas flow through the ejector burner device G ⁿ _egu = (0.05. ..0.06) kg / s and operating time τ _n = 9 ... 15 h, after which the ejector burner is put into operation in the last forced mode with the same coefficient of excess oxidizer and flame temperature, as in the nominal mode, but with an increased gas mass flow through ejector burner G ^f _ecu = 0.07 kg / s and operating time τ _f ≤ 2 ÷ 3 h, after which the heated ladle is fed under the melt drain from the converter .