FR2528326A3 - Reinforced concrete recycling plant - from demolition using several feeding crushing and steel removal stations according to concrete size - Google Patents

Abstract

The equipment consists basically of a feed (1), a crusher (2) and continuous steel removal (3). Material not fed during the first operation, resulting from a size restriction, is directed to a secondary feed (5) and then a secondary crusher (6) and steel remover (7). After the second steel removal the materials are directed to a sieve which separates them into three categories, according to dimensions. These are 0 to 6mm, 6 to 20mm and over 20mm. After the second steel removal material is directed to a washing plant (11) to remove wood, plastics paper etc. Material over 20mm goes to a third crusher etc. (13).

Description

 The present invention relates to a plant for the treatment of reinforced concrete from the demolition of buildings.

 Installa, conventional ions for crushing materials known to date, make it possible to treat natural or agglomerated rocks (concrete), but do not accept reinforced concrete. These are therefore sent to landfill, after recovery, using mechanical devices and torches, of part of the scrap.

 This naturally involves drawbacks, which are of two kinds: on the one hand, the discharges often harm the environment and, on the other hand, the concrete and a large part of the scrap not being recovered, this causes a a certain waste.

 In order to overcome these drawbacks, the inventor has developed an installation which allows the recovery and reuse of all the components of reinforced concrete.

 This installation separates these components into three categories a) minerals, which are crushed; b) concrete irons; c) plastic products, wood and miscellaneous waste.

It makes it possible to obtain: - materials for the construction of buildings and red construction
in the form of aggregates (sand and gravel), constituent elements
concrete forms; - recycling of reinforced concrete reinforcements for reuse in the steelworks - elimination of light products, such as insulation, wood and
miscellaneous waste.

 The attached diagrams represent the treatment process.

The materials are transported from one element to another of the installation by a conveyor belt.

 According to Figure 1, the materials are introduced into a vibrating primary feeder or metal table 1, which directs them to a primary crusher with single or double-acting jaw 2. Once crushed, the materials are treated by a primary derailleur continuous 3.

Those with a size less than or equal to 60 mm. are then evacuated in 4.

 Materials of a larger size are. directed to a secondary vibrating feeder or to a metal table 5, then to a secondary crusher with simple or double-acting jaw 6, and finally to a secondary breaker 7. The elements 5, 6 e- 7 are of a lower capacity than those used before the first evacuation.

 The materials are then directed to a secondary screen 8. This separates them into three categories a) materials from 0 to 6 S. : they are evacuated in 10.

b) materials from 6 to 2G rxl. : they are directed to a
cleaning 11 which aims to eliminate unusable light waste
such as wood, polystyrene, paper, rags, etc. This device is
composed of a primary screen and a circulation washing system
tion of water opposite to the direction of rotation of the conveyor belt. These
materials thus cleaned are evacuated in I4, after aaolr underwent a new
feraillage by a static tertiary rail I3. For their part,
light waste is evacuated in I2.

c) materials whose size is greater than 20 min. : they are directed
to a tertiary impact crusher 9 and then return to
the secondary screen 8, which sorts them according to the process described above.

 The inventor also imagined a variant, described in FIG. 2.

 The operations are identical up to and including the secondary breaking in 7.

 At the outlet of this reamer 7, the materials are sent to a cleaning installation 11 'identical to the installation 11 described above. Light waste is evacuated in I2 '.

 The heavy materials are then directed to a secondary screen 8 '. After this sieve treatment, the materials from 0 to 6 min. are evacuated at 101 and the materials from 6 to 20 mm. are evacuated in I4t, after passing through a tertiary sLatique I3t.

 Materials larger than 20mm. are directed to a gyratory tertiary crusher 9 'and then return to the secondary screen 8' to finally be discharged in 10 'or, after passing through the static tertiary rake I3', in I4 ', depending on their size.

 At the end of this treatment, according to any of the variants described above, there are therefore - - materials from 0 to 60 m.

20 - from 3 to 6 mm material. ; 30 - materials from 6 to 20 mm, all of which are rid of unusable waste.

 The above descriptions are in no way limiting, and the addition of intermediate machines cannot remove the installation which is the subject of the present invention from the scope thereof.

Furthermore, the arrangement shown on the accompanying drawing sheets is given only by way of example. It may naturally vary depending on the shape of the land on which the installation
will be implemented.

Claims (5)

R E V E N D I C A T I 0 N S 1. - Installation for the treatment of reinforced concrete from the demolition of  buildings intended for the recycling of its characteristic components  sée in that it comprises, successively, a feeder, a concas  sister and a known underwriter. 2. - Installation according to claim 1 characterized in that the mate  rials not removed during the first operation, due to their size  are directed to a secondary feeder and then to a crusher  secondary, then to a secondary derailleur. 3. - Installation according to claim 2 characterized in that the mate  rials are directed, after the second railing, to a screen which  separates them into three categories, according to their dimensions  a) evacuation of materials from O to 6 min. ;  b) sending materials from 6 to 20 mm. to a washing facility which  rids them of light waste which is discharged, and then discharges  said materials, after passing through a tertiary railroad sta  tick;  c) return of materials larger than 20 mm. towards a concas  tertiary percussion and new screening, which  sorts according to the process described above. 4. - Installation according to claim 2 carac.érisée in that the maté  rials are directed, after the second rail removal, to an installation  washing that removes light waste, which is disposed of. 5. - Installation according to claim 4 characterized in that the maté  rials are directed to a screen which separates them into three categories  a) evacuation of materials from 0 to 6 mm. ;  b) evacuation of materials from 6 to 20 mm., after passing through a surge  static tertiary mocker;  c) return of materials larger than 20 mm. towards a concas  tertiary roundabout and further screening, which sorts them  according to the process described above.