Patent ID: 8869567

Claim:
A device for forming mineral fibers comprising: a fiber-forming centrifuge to rotate about a rotation axis, the centrifuge comprising: an upper side of the centrifuge; an annular wall pierced with a plurality of holes, the annular wall having the rotation axis as its axis of symmetry; a rounding positioned between the annular wall and the upper side; at least one row of one continuous relief or of discontinuous reliefs situated on an outer surface of the centrifuge, wherein at least one row of continuous or discontinuous reliefs extends, when the centrifuge is in a centrifuging position, along the annular wall, the rounding, or along the upper side of the centrifuge, close to the rounding; and an annular burner generating a high-temperature gaseous attenuation jet, wherein an outlet of the annular burner is situated above the at least one row of one continuous relief or of discontinuous reliefs of the centrifuge in a fiber-forming position, the gaseous attenuation jet is tangential to the annular wall of the centrifuge, and the at least one row of continuous or discontinuous reliefs are in the high-temperature gaseous attenuation jet that comes out of the burner, and wherein the at least one row is horizontal or inclined at an angle of more than 0° and less than 90° relative to the horizontal when the centrifuge is in the centrifuging position.