| 摘要 |
<p>Injection device to inject one or more fluids and/or solids into a metal bath, comprising a cooled main body (11), a fluids emission pipe (16a) suitable to inject at least a first fluid in the direction of the metal bath, and a fluids and/or solids emission pipe (19a) suitable to inject at least a second fluid and/or a solid, in the direction of the metal bath. The device comprises burner means (29), having respective fluids emission pipes (30a, 31a) disposed annularly around both the first injection means (16) and the second injection means (19), so as to define at least two crowns, respectively an internal crown (30) and an external crown (31) around them, said emission pipes (30a, 31a) being suitable to inject respectively at least a comburent fluid and at least a combustible fluid in the direction of the metal bath. The device comprises first valve means (42, 39, 45) able to selectively and respectively connect said fluids emission pipes (16a, 30a, 31a) with respective first feed means of a respective comburent fluid, for example oxygen, or combustible fluid, and second valve means (43, 40, 46) able to selectively and respectively connect, by means of auxiliary pipes (41, 37, 44), the fluids emission pipes (16a, 30a, 31a) with respective second feed means of a respective cleaning fluid, for example compressed air, or an inert gas.</p> |
