Abstract: A device for the removal of a solidified mineral melt, termed flash, from the discharge end of a spout (3) of a transport channel (1) that is used to carry liquid mineral melt (2) to a mineral wool fiber producing unit (4). The device has a finger (9) made of a heat resistant material which is mounted to be quickly moved by a motor (10, 11) past and through liquid mineral melt (5) below and adjacent the spout (3) on the melt channel (1) in order to scrape off existing flash material from the discharge end of the melt channel (1). The device optionally may have a thermosensor, that emits an alarm signal, in case the temperature of the mineral melt at any point falls below a predetermined temperature, and/or a sensor designed to immediatley actuate the flash removal finger (9) as soon as a tendency to flash formation appears.

Abstract: Method and apparatus for removing fibres and other particles from the surfaces of compressible mineral wool products, for instance, mineral wool plates (2), by means of one or more suction slot nozzles (5) which suck air from adjacent the surfaces of the mineral wool products. The mineral wool products, while being exposed to the suction of slot or slots (5), are subjected to a quick compression so that a part of the air enclosed in the mineral wool is forced out towards the suction slot or slots (5) thereby bringing loose fibres and other particles at and adjacent the surfaces into the suction slot or slots (5).