| 摘要 |
In a process for the production of mineral wool fibers according to the jet blast process, comprising issuing at least one melt stream from at least one opening in the base of a melting crucible into a converging-diverging drawing nozzle, flowing a gaseous blasting medium into the nozzle substantially parallel to the melt stream so as to separate the melt stream into fibers, the blasting medium being drawn into the nozzle by suction due to a drop in pressure produced between the nozzle inlet and outlet, and passing the fibers and sent blasting gas into a diffuser connected downstream of the nozzle to reduce the gas rate of flow, the improvements which comprise effecting (a) a maximum drop pressure in the inlet of the drawing nozzle; (b) a minimum drop pressure in the diverging portion of the drawing nozzle over a maximum length without separation (transition) of the laminar boundary layer; (c) the subsequent pressure conversion initially with a shock at a constant cross-section of the drawing nozzle and subsequently in a subsonic diffuser.
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