Metallurgical apparatus – Process
Patent
1993-04-29
1995-03-28
Kastler, Scott
Metallurgical apparatus
Process
266280, 264 30, F27D 116
Patent
active
054010039
ABSTRACT:
A method of applying a hot composite on top of the refractory lining of steel making and processing vessels is disclosed. The composite may be applied to the refractory wall in more than one layer, including a dense intermediate layer for adhesion, and a less dense layer on top that is designed to be consumed as a slag-forming component during steel making and refining. The composite is applied by discharging a carrier gas containing a mixture of small particles, including particles of silica, particles of at least one high-temperature oxide based material and particles of solid carbonaceous fuel, through a carrier gas discharge nozzle. Additional substances may be added to the mixture to enhance the slag-forming process. A controllable flow of oxidizing gas is charged at high and preferably supersonic speed through an essentially crescent-shaped nozzle partially surrounding the carrier gas discharge nozzle. The carbonaceous fuel is ignited and rapidly burned, causing silica based material to become fluid and to coat the high-temperature oxide particles, thereby enhancing the adhering properties of said hot particles and facilitating the reaction of high-temperature oxide with the silica. The resulting hot gaseous mixture and hot particles are impacted on the refractory wall, where at least some of the hot particles adhere. By controlling the flow of oxidizable gas, the supply of fuel, or both, the amount of solid carbon in the composite applied to the refractory wall, and hence, the porosity of the deposit, is controlled.
REFERENCES:
patent: 4487397 (1984-12-01), Antonov et al.
O. N. Chemeris, et al., "The Utilization of Slagforming Materials for BOF Flame Gunning"; Refractories No. 3, Dec. 1982, ISSN 03697290.
Aizatulov Rafik
Galperine Grigori
Gitman Gregory M.
Grenader Iakov
Kustov Boris
Kastler Scott
Zaptech Corporation
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