Facility for producing mineral wool

Abstract

A facility for producing mineral wool, includes at least one supply device for supplying mineral fibers and a fiber-distribution station including a conveyor belt which can move in a longitudinal direction and on which the mineral fibers can be received so as to form a mineral fiber mat, wherein the fiber distribution station includes a roller table arranged on the passage of the mineral fibers that are intended to fall by gravity onto the conveyor belt, wherein each roller can be driven in rotation about a transverse axis of rotation, the rollers being configured to dispose the mineral fibers uniformly through the thickness of the fiber mat formed on the conveyor belt.

1 . A facility for producing mineral wool, comprising at least one supply device for supplying mineral fibers and a fiber distribution station comprising a conveyor belt which is movable in a longitudinal direction and on which the mineral fibers are receivable so as to form a mineral fiber mat, wherein the fiber distribution station comprises a roller table arranged on the passage of the mineral fibers that are intended to fall by gravity onto the conveyor belt, the roller table comprising at least three rollers, each roller being able to be driven in rotation about a transverse axis of rotation, the at least three rollers being configured to dispose the mineral fibers uniformly through the thickness of the fiber mat formed on the conveyor belt. 
     
     
         2 . The facility for producing mineral wool according to  claim 1 , wherein the roller table comprises a plurality of rollers arranged parallel to each other with a spacing between two adjacent rollers that is variable from one end of the roller table to the other. 
     
     
         3 . The facility for producing mineral wool according to  claim 2 , wherein the spacing between two successive rollers of the roller table varies by regularly increasing each spacing in the direction of movement of the fibers from one roller to the other. 
     
     
         4 . The facility for producing mineral wool according to  claim 1 , wherein each roller is driven by individual drive means. 
     
     
         5 . The facility for producing mineral wool according to  claim 4 , wherein each roller is driven at a different rotational speed from that of the adjacent rollers, the rotational speeds of the at least three rollers decreasing in the direction of movement of the fibers from one roller to another. 
     
     
         6 . The facility for producing mineral wool according to  claim 1 , wherein a speed of movement of the conveyor belt is between 5 and 100 m/min so that the mineral fiber mat has a bulk density of between 5 and 40 kg/m3. 
     
     
         7 . The facility for producing mineral wool according to  claim 6 , wherein a conveying belt is arranged between the supply device for supplying mineral fibers and the mineral fiber distribution station so that mineral fibers at an outlet of the conveyor belt are able to fall by gravity onto the conveyor belt via a passage between the rollers of the roller table, the speed of movement of the conveyor belt being a function of a speed of movement of the conveying belt and of the desired bulk density of the mineral fibers in the fiber mat. 
     
     
         8 . The facility for producing mineral wool according to  claim 1 , wherein the fiber distribution station is equipped with a deflector means configured to guide the mineral fibers at an outlet of the supply device to the conveyor belt. 
     
     
         9 . The facility for producing mineral wool according to  claim 1 , wherein the at least three rollers each have reliefs on their surface, arranged regularly along the axis of rotation of the rollers. 
     
     
         10 . The facility for producing mineral wool according to  claim 1 , wherein the at least three rollers consist of toothed rollers, each tooth forming a radial protrusion of the roller body driven in rotation. 
     
     
         11 . The facility for producing mineral wool according to  claim 10 , wherein at least one roller comprises a plurality of toothed rings arranged parallel to one another along the transverse axis of rotation of the corresponding roller. 
     
     
         12 . The facility for producing mineral wool according to  claim 1 , wherein the roller table comprises a plurality of rollers arranged in parallel with one another, among which a proximal roller is arranged at one end of the roller table. 
     
     
         13 . The facility for producing mineral wool according to  claim 12 , wherein the fiber distribution station comprises means for mechanically guiding the mineral fibers in a direction of the proximal roller so that all the mineral fibers entering the fiber distribution station are directed towards the conveyor belt so that the mineral fibers fall onto the proximal roller or between the proximal roller and the roller that is immediately adjacent thereto. 
     
     
         14 . The facility for producing mineral wool according to  claim 12 , wherein a vertical clearance between the proximal roller and the conveyor belt is less than a threshold value depending on an average length of the mineral fiber treated by the facility. 
     
     
         15 . The facility for producing mineral wool according to  claim 14 , wherein the vertical clearance is measured between an external peripheral surface of the proximal roller and the conveyor belt. 
     
     
         16 . The facility for producing mineral wool according to  claim 1 , wherein the roller table extends mainly along an axis inclined relative to a main extension plane of the conveyor belt. 
     
     
         17 . The facility for producing mineral wool according to  claim 1 , wherein the fiber distribution station comprises means for adjusting a tilt of the roller table. 
     
     
         18 . The facility for producing mineral wool according to  claim 1 , wherein the supply device for supplying mineral fibers comprises means for supplying non-binding mineral fibers and a binder in powder form or mineral fibers pre-coated with binder.