Use of a device for cleaning metal fibers with a view to recycle and recover the same

Abstract

The field of the invention is the recovery and recycling of materials, particularly the recycling of tyres. It relates particularly to a device for cleaning metal fibres comprising at least 2 coaxial cones, one fixed and one mobile in rotation, and means of moving said mobile cone.

1 . A method of using a device for cleaning metal fibres, the device comprising
 at least two coaxial cones, said first cone comprising a stator being fixed and the second cone comprising a rotor, having smaller dimensions than those of the stator, positioned inside the stator, being mobile in rotation about the central axis common to the two cones, the inner wall of the stator and outer wall of the rotor never coming into contact and arranging between them a free space itself having a conical cross section, the small bases and the large bases of the stator and of the rotor being respectively situated on the same side;   a means of moving the rotor, for cleaning metal fibres, particularly steel fibres, very particularly steel fibres originating from tyre recycling.   
     
     
         2 . The method according to  claim 1 , wherein the wall of the stator is rectilinear. 
     
     
         3 . The method according to  claim 2 , wherein the wall of the stator has an angle comprised between 15° and 45° to the vertical, preferably comprised between 20° and 40°. 
     
     
         4 . The method according to  claim 1  wherein when the wall of the stator is not rectilinear, the wall has a lower part and an upper part between them forming an angle comprised between 170° and 179°, preferably between 174° and 176°. 
     
     
         5 . The method according to  claim 2 , wherein the lower part of the stator wall represents between 15% and 35% of the total height of the stator, preferably between 20% and 30%. 
     
     
         6 . The method according to  claim 1 , wherein the wall of the rotor has an angle comprised between 5° to 25°, preferably between 10° to 20° to the vertical. 
     
     
         7 . The method according to  claim 1 , wherein the ratio between the diameter of the small base of the rotor and the diameter of the small base of the stator is comprised between 0.82 and 0.99, preferably between 0.90 and 0.95. 
     
     
         8 . The method according to  claim 1 , wherein the means of moving the rotor is an electric motor or a heat engine or also a pneumatic means. 
     
     
         9 . The method according to  claim 1 , wherein the rotor is moved at a speed comprised between 45 and 100 rpm, preferably between 60 and 85 rpm. 
     
     
         10 . The method according to  claim 1 , wherein the walls of the stator and/or of the rotor are simultaneously and/or independently made of steel, particularly stainless steel, or also carbon steel. 
     
     
         11 . The method according to  claim 1 , wherein the walls of the stator and/or of the rotor, simultaneously and/or independently, have a thickness comprised between 10 mm and 200 mm, preferably between mm and 100 mm. 
     
     
         12 . The method according to  claim 1 , wherein the walls of the stator and/or of the rotor, simultaneously or independently, are smooth or ribbed, preferably ribbed, very preferably vertically ribbed. 
     
     
         13 . The method of cleaning metal fibres, using the device according to  claim 1 , in which the raw material to be cleaned is introduced into the space arranged between the stator and the rotor of the device according to the invention, through the upper opening, the rotor being driven in rotation at a speed comprised between 45 and 100 rpm, preferably between 60 and 85 rpm, and at least the refined material is collected on leaving the lower opening of the space arranged between the stator and the rotor, on the lower part of the device, said material possibly being mixed with the residue of contaminants removed from the surface of the raw material to be cleaned. 
     
     
         14 . The method according to  claim 1  of the device, wherein said cones are nested together along a common central vertical axis, and the means of moving the rotor comprises a drive means for the rotor,
 said stator having a height of 950 mm, having a lower base of 800 mm, the wall of said stator being made of steel 15 mm thick, non-rectilinear, having a lower part reaching a height of 200 mm with an angle of 20° to the vertical and an upper part, meeting the lower part, reaching a height of 750 mm with an angle of 25° to the vertical, the lower part and the upper part between them forming an angle of 175°, 
 said rotor having a height of 1,000 mm, having a lower base of 750 mm, the wall of said rotor being made of steel 15 mm thick, rectilinear, forming an angle of 25° to the vertical.