Method and installation for grinding or fragmenting bituminous products

Abstract

The invention relates to a method for grinding raw materials (MP) mainly formed of elements of the membrane type or the like, this method consisting of treating these products (MP) by means of at least two successive grinding stations (1, 2, 3), so as to reduce each time the average size of the elements forming the successively treated bituminous products (PT1, PT2, PT3). The method is characterized in that it consists of: using a rotary shearing shredder (1', 2', 3') at each of the grinding stations (1, 2, 3), preferably at least three in number; controlling the shear heating of the products (MP, PT1, PT2) during treatment, by regulating their residence time, and therefore treatment time, in each shredder (1', 2', 3'); and transferring the treated products (PT1, PT2) from one grinding station (1, 2) to the respectively consecutive grinding station (2, 3), while limiting the heat losses.

Description

Description Title of the invention: Method and installation for crushing or fragmenting bituminous products

[0001] [The present invention relates to the field of recycling and recovery of waste from factories, and from demolition, restoration and construction sites in relation to roofing and waterproofing materials and systems, in particular in relation to waste composed mainly of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like.

[0002] In this context, the invention relates to a method and an installation for crushing or fragmenting raw materials mainly in the form of bituminous products, as well as a method and an installation for thermomechanical treatment for the purpose of recycling raw materials, respectively comprising a method or an installation of the aforementioned type.

[0003] As part of the current general trend to seek possible recovery of waste, a growing demand, which is currently not satisfactorily resolved, either at a technical or economic level, concerns factory waste and especially construction site waste (demolition, restoration, construction) containing mainly, or possibly almost exclusively, bituminous products in the form of membranes, panels, shingles or similar.

[0004] From documents WO 2021 / 213792 and WO 2021 / 213793, methods and installations are already known for treating waste of the type mentioned above with a view to recovering and reusing the bituminous substances they contain.

[0005] However, although they can process products of any size and format, these installations operate optimally when the inputs are of a small size and a substantially uniform format.

[0006] The aim of the present invention is to propose a simple, robust, reliable and energy-efficient solution for pre-treating factory and construction site waste comprising bituminous materials, preferably for the most part, by carrying out a dimensional reduction in order to format them for optimized subsequent revaluation treatment. This solution should be able to be implemented without requiring the addition of facilitating substance and not require too frequent maintenance.

[0007] To this end, the invention relates to a method for grinding or fragmenting raw materials mainly in the form of bituminous products, for example formed from elements of the membrane type, portions of membranes, shingles or the like, in particular as production, construction or demolition waste, this method essentially consisting of treating these products by means of at least two successive grinding or fragmentation stations, so as to reduce each time the average size of the elements forming the successively treated bituminous products, method characterized in that it consists of implementing a shredder with rotary shears at each of the grinding stations, preferably at least three in number, controlling the heating by shearing of the products during their treatment by regulating their residence time, and therefore treatment time, in each shredder and transferring the treated products,from one grinding station to the respective consecutive grinding station, limiting heat losses.,

[0008] The invention also relates to an installation for grinding or fragmenting raw materials mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste, this installation essentially comprising at least two successive grinding or fragmentation stations, configured to reduce each time the average size according to at least one dimension of the elements forming the successively treated bituminous products, said installation also comprising, upstream of the first grinding station, a raw materials supply station and, downstream of the last grinding station, a treated products discharge station, as well as means for intermediate transfer of treated products between two consecutive grinding stations, installation characterized in that each of the grinding stations, preferably at least three in number,comprises a rotary shear shredder, in that it comprises means for regulating the residence times, and therefore the processing times, of the products at, during their processing in each shredder, with a view to controlling heating by shearing of said products and in that the means of intermediate transfer of processed products, from one grinding station to the respective next grinding station, are configured to limit heat losses.

[0009] The invention will be better understood from the following description, which relates to a preferred embodiment, given as a non-limiting example, and explained with reference to the appended schematic drawings, in which:

[0010] [Fig. 1] is a schematic perspective view of a crushing or fragmentation installation according to a preferred embodiment of the invention, with three stations;

[0011] [Fig. 2] is a partial detail view and to a different scale showing the first grinding station of the installation of figure 1;

[0012] [Fig. 3] is a partial detail view on another scale showing the arrangement formed by the second and third grinding stations of the installation of Figure 1;

[0013] [Fig. 4] is a perspective view of an alternative embodiment of the first grinding station shown in Figure 2, and,

[0014] [Fig. 5] is a perspective and top view of part of the shredder forming part of the first crushing station for example, and where appropriate also of the other station(s) (feed hopper removed and axis drive motors not shown).

[0015] The invention relates firstly, as is apparent from the figures, to a method for grinding or fragmenting raw materials (RM), which are mainly in the form of bituminous products and are, for example, formed from elements of the membrane type, portions of membranes, shingles or the like, in particular as production, construction or demolition waste.

[0016] This process essentially consists of treating these products (MP) by means of at least two, preferably at least three, successive grinding or fragmentation stations (1, 2, 3), so as to reduce each time (i.e. at each treatment at a station) the average size of the elements forming the successively processed bituminous products (PT1, PT2, PT3), between the inputs and outputs of the post concerned.

[0017] This method is characterized in that it consists of implementing a rotary shear shredder (T, 2', 3') at each of the grinding stations (1, 2, 3), controlling the heating by shearing of the products (MP, PT1, PT2) during their treatment by regulating their residence time, and therefore treatment time, in each shredder (T, 2', 3') and transferring the treated products (PT1, PT2), from a grinding station (1, 2) to the respectively consecutive or following grinding station (2, 3), while limiting heat losses.

[0018] Thanks to the invention, the bituminous products forming the raw materials are reliably and progressively fragmented in successive stages, limiting overall energy expenditure. In addition, the resulting treated products (preferably pellets with an average particle size of 10 to 15 mm) carry a positive mass calorific load, also due to the limited dissipation during transfer between stations, thereby reducing the energy input in the subsequent treatment stages, before separation and recycling of the bituminous materials. This results in significant energy savings throughout the entire recycling process (more favorable energy balance).

[0019] Indeed, in relation to the method according to the invention and taking into account the nature of the products treated, it has been found that the mechanical energy of shredding by shearing is transformed into thermal energy advantageously heating the material of the products treated: the friction of the treated material (mainly bituminous based) between the shredding members gradually heats the latter as it passes through the various successive stations, preferentially resulting in an output at the exit of the last station which has a viscous constitution.

[0020] The physical characteristics of the bituminous materials present in the treated products (non-Newtonian rheology, low thermal conductivity and high specific heat capacity - 2100 J / kg.K) significantly slow down the heating of the material. The preheating of fragments of bituminous products (particularly membranes) or "chips" in the shredders (T, 2', 3') transforms the initially solid bituminous material into a viscous and non-viscous mass. solid, which gives it new physical properties subsequently facilitating heat exchange in the process of transforming this material into a liquid mass with a view to separating and recycling the recovered bitumen or bitumen mixture.

[0021] In accordance with a preferred embodiment, and as illustrated in the attached figures, the invention provides three consecutive grinding stations (1, 2 and 3), which constitutes an optimized compromise between complexity of the installation, reliability of the treatment and energy expenditure.

[0022] In the context of this embodiment, it is advantageously provided, with a view to a good distribution of stresses and wear in the different shredders and to obtaining a homogeneous overall treatment, to calibrate the respective shredders (T, 2', 3') in such a way that the first shredder (1') delivers treated products (PT1) whose constituent elements have a width of at most 100 mm, preferably at most 80 mm, that the second shredder (2') delivers treated products (PT2) whose constituent elements have a width of at most 30 mm, preferably at most 20 mm and that the third shredder (3') delivers treated products (PT3) whose constituent elements have a width of at most 15 mm, preferably at most 12 mm.

[0023] In order to be able to guarantee a certain uniformity of treatment over time in each grinding station (1, 2, 3) and treated products having substantially constant dimensional and physical state characteristics for successive operating cycles, the method may consist of regulating the residence time of the products (MP, PT1, PT2) being treated in each shredder (1', 2', 3') as a function of the quantity of product to be treated (MP, PT1, PT2), for example determined by continuous weighing of the first shredder (1') at least, preferably of each shredder (T, 2', 3').

[0024] Preferably, processing is done in batches and the quantity of product present in a shredder is regulated by simultaneous control of its feed and discharge.

[0025] In order to be able to limit the power required for its operation, it may be provided to heat the rotating shredding members (12) at least shredder (1') of the first shredding station (1), at least during the start-up phases of the shredder concerned. For this purpose, the shredding members of the first shredder (T) or preferably of each shredder (1', 2', 3') are equipped with suitable heating means (heating resistors) or mounted on a heating shaft (for example a hollow shaft running through hot oil).

[0026] The invention also relates to a thermomechanical treatment process for the purpose of recycling raw materials (RM) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste.

[0027] This process comprises a plurality of successive treatment steps including grinding, dimensional reduction, heating and separation operations, some of which are carried out in a combined manner, and said treatment process being carried out in a continuous or intermittent (batch) overall flow, which may be regulated where appropriate.

[0028] This process is characterized in that it comprises a first treatment phase corresponding to the process of grinding or fragmenting raw materials (PM) described above.

[0029] Preferably, said raw materials (RM) will have previously undergone controlled selective recomposition from batches of waste with varied origins and compositions, in terms of the rate of presence and nature of bituminous and non-bituminous materials present (in order to have batches each with a known composition).

[0030] For further processing of the treated products resulting from the raw material (RM) grinding or fragmentation process described above, it may be envisaged to implement the processes and installations described in documents WO 2021 / 213792 and WO 2021 / 213793 in the name of the applicant.

[0031] The invention also relates, as shown by way of example in Figure 1 and partially in Figures 2 to 4, to an installation (4) for crushing or fragmenting raw materials (RM) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste.

[0032] This installation essentially comprises at least two, preferably at least three, successive grinding or fragmentation stations (1, 2, 3), configured to reduce the average size according to at least one dimension of the elements forming the bituminous products (MP, PT1, PT2) to be treated by each of them. These different stations thus form a progressive grinding or fragmentation line, in successive stages.

[0033] This installation (4) also comprises, upstream of the first grinding station (1), a raw material (MP) feed station (5) and, downstream of the last grinding station (3), a station (6) for removing the treated products (PT3), as well as intermediate transfer means (7, 7') of treated products (PT1, PT2) between two consecutive grinding stations (1, 2; 2, 3).

[0034] This installation (4) is characterized in that each of the grinding stations (1, 2, 3) comprises a rotary shear shredder (T, 2', 3'), in that it comprises means (8) for regulating the residence times, and therefore the treatment times, of the products (MP, PT1, PT2) during their treatment in each shredder (T, 2', 3'), in order to control the heating by shearing of said products (MP, PT1, PT2) and in that the intermediate transfer means (7, 7') of treated products (PT1, PT2), from one grinding station (1, 2) to the respective following grinding station (2, 3), are configured to limit heat losses.

[0035] As a beneficial compromise, the installation (4) comprises three consecutive grinding stations (1, 2 and 3), and their respective shredders (T, 2', 3') are preferably calibrated in such a way that the first shredder (1') delivers treated products (PT 1 ) whose constituent elements have a width of at most 100 mm, preferably at most 80 mm, that the second shredder (2') delivers treated products (PT2) whose constituent elements have a width of at most 30 mm, preferably at most 20 mm and that the third shredder (3') delivers treated products (PT3) whose constituent elements have a width of at most 15 mm, preferably at most 12 mm.

[0036] Advantageously, the means (8) for regulating the residence times comprise means for measuring the quantity of product to be treated (MP, PT1, PT2) present in the different shredders (T, 2', 3'), for example in the form means (8) for continuous weighing of each shredder (T, 2', 3'). These weighing means may, for example, consist of scales integrated into the support structure or chassis of each shredding station.

[0037] The different shredders (T, 2', 3') are preferably of the same type, the first (T) at least being of a larger size than the others.

[0038] In accordance with an advantageous embodiment of the invention, and as shown in Figure 5, the shredders (T, 2', 3') each comprise two parallel rotating shafts (13, 13'), rotating mutually in opposite directions and provided with shredding members (12) of the knife type, the members of one shaft (13, 13') being interpenetrating with those of the other shaft (13', 13) and scrapers (12') being arranged between two neighboring members (12) along the shaft (13, 13') in question, the shredder (T) of the first grinding station (1) at least favorably comprising rotary shredding members (12) equipped with heating means.

[0039] As a concrete, but not limiting, solution for implementing the invention, the shredders (1', 2', 3') can be based on commercial shredders of the B850 and B600 type from the company BLIK, the first (1') being of the B850 type and the second and third (2', 3') being of the B650 type.

[0040] These known shredders are preferably specifically adapted for the needs of implementing the invention and in particular provided with different sensor means (temperature of the knives, internal temperature, torque at the axes, etc.) making it possible to monitor their operating condition and authorizing a central control unit connected to them to control the installation (4).

[0041] In order to prevent the treated products (PT1, PT2) from sticking, the installation may also include means (9) for spraying mineral oil and / or mineral powder, such as, for example, talc, onto the means (7, 7') for intermediate transfer of the treated products (PT1, PT2), for example in the form of belt conveyors with thermal insulation properties. Where appropriate, the feed hoppers of the shredders also have suitable means for preventing the products poured into them from sticking.

[0042] In order to limit the space requirement and avoid heat loss, the lower outlet of the shredder (2') of the second grinding station (2) can be arranged in the immediate vicinity of the upper inlet (hopper) of the shredder (3') of the third grinding station (3), these two grinding stations (2' and 3') being preferably arranged in a mutually superimposed manner.

[0043] The installation (4) may also comprise a device (10) for detecting, and where appropriate ejecting, the metal elements or parts present in the treated products (PT2, PT3), located after the second shredder (2') or after the third shredder (3'), for example in the form of a device for detecting and extracting on the fly acting on a moving flow of treated products (PT2, PT3).

[0044] Finally, the shredder (T) of the first grinding station (1) at least is advantageously provided with a crusher (11), which makes it possible to break the raw material (MP) vault which may form in its feed hopper due to an irregular inlet flow and / or the presence of large elements.

[0045] In connection with a practical construction of the various above-mentioned shredders (1', 2', 3'), the latter may result from the following modifications applied to commercially available B850 and B600 shredders: - A weighing device (8) is arranged at least under the first grinder (T) so as to continuously weigh the quantity of product contained in this grinder. In addition, a tare is adjusted depending on any possible clogging. - The counter knives of the grinders are equipped with electric heating elements, of the heating cartridge type. - Temperature sensors are placed in each cartridge and at the counter blades respectively. The first serves as a safety feature to limit the maximum temperature to avoid the ignition point on the parts in contact with the product to be treated. The second sensor is used to regulate the heating temperature of the counter blades. - Each cartridge is independently controlled by a temperature regulator. The temperature setting can be configured from a process monitoring screen which is part of a central control unit connected to the grinders and controlling the installation (4). - Two emergency stop levels are managed for access to the crushers: the first is used to cut off the power supply to the motors driving the axes (13, 13') of the crushers to avoid any risks for the operator. The second emergency stop level cuts off all other energy sources: thus the operating conditions are maintained after an intervention by the operator. - A preheating function for the grinders is programmable in the supervision to make them operational as soon as the machine operators arrive. - A surveillance camera is placed above each crusher and on the conveyors at the exit of each crusher: they allow the operator to check the behavior of each crusher and, if necessary, correct the feed speeds. - Images from all cameras are recorded on a server and can be viewed if inappropriate behavior has occurred. - Infrared fire safety sensors are placed around the crusher area and constantly monitor any abnormal temperature rise.

[0046] The size and shape of the chips are highly dependent on the raw material to be ground. However, by adjusting the temperature of the grinders, the residence time in the grinders and the quantity of material contained in the hopper of the grinder concerned, it is possible to ensure a substantially constant size of chips at the outlet of each of the said grinders.

[0047] The smaller the size of the chips, the smaller the reinforcement portions present in the chips. This is because thermal conduction is very low in bitumen. Another advantage of reducing the size of the chips is that they increase their contact surface with the heating elements present in the crushers: this means that the chips heat up more quickly in the crushers.

[0048] The desired temperature for the processed products, at the outlet of the grinders, is between 40°C and 70°C. The successive grindings through the three grinders recommended by the invention considerably modify the shape of the chips: the more they have been subjected to a long residence time in the grinders, the more complex their shape and their efficient heat exchange characteristics.

[0049] In relation to the invention, several measures can be envisaged to allow the maximum amount of heat to be retained in the chips during their transfer between stations: the conveying speed can be adjustable to reduce the transfer time as much as possible, the conveyor belts (7, 7') can be made of thick rubbery / polymeric materials to reduce heat losses; the conveyor belts (7, 7') can comprise successive cavities (buckets) which will limit heat losses around the chips; the conveyor belts (7, 7') can be surmounted by longitudinally curved partitions so as to form tunnels with them. The same is of course true for the conveyor belt forming part of the evacuation means (6) in Figure 1.

[0050] The invention also relates to a thermomechanical treatment installation for the purpose of recycling raw materials (RM) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste.

[0051] This installation (not shown) comprises at least means of grinding, dimensional reduction, heating and separation, these means being arranged to form at least one line for processing and extracting material(s) to be recovered, operating in continuous or intermittent flow, regulated where appropriate.

[0052] This installation is characterized in that the or each treatment and extraction line comprises a first set of means corresponding to an installation (4) for crushing or fragmenting raw materials (MP) as described above, said installation (4) comprising, where appropriate, or possibly being associated with, a site or station for controlled selective composition of said raw materials (MP), this from batches of waste having varied origins and compositions, in terms of the rate of presence and nature of bituminous and non-bituminous materials present.

[0053] Preferably, to limit heat losses, the evacuation station (6) of the grinding or fragmentation installation (4) directly supplies at least one heating mixer which is also part of said treatment installation.

[0054] The thermomechanical treatment installation according to the present invention may in particular comprise, following an installation (4) for grinding or fragmenting raw materials (MP) as described above, an installation as described in documents WO 2021 / 213792 and WO 2021 / 213793 in the name of the applicant.

[0055] Of course, the invention is not limited to the embodiment described and shown in the attached drawings. Modifications remain possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. Method for grinding or fragmenting raw materials (MP) mainly in the form of bituminous products, for example formed from elements of the membrane type, portions of membranes, shingles or the like, in particular as production, construction or demolition waste, this method essentially consisting of treating these products (MP) by means of at least two successive grinding or fragmentation stations (1, 2, 3), so as to reduce each time the average size of the elements forming the successively treated bituminous products (PT1, PT2, PT3), method characterized in that it consists of implementing a shredder with rotary shears (1', 2', 3') at each of the grinding stations (1, 2, 3), preferably at least three in number, to control heating by shearing of the products (MP, PT1, PT2) during their treatment in regulating their length of stay, and therefore of treatment,in each shredder (1', 2', 3') and to transfer the processed products (PT1, PT2), from a grinding station (1, 2) to the respectively consecutive grinding station (2, 3), while limiting heat losses.,

2. Grinding method according to claim 1, characterized in that it consists of providing three grinding stations (1, 2 and 3) and calibrating the respective shredders (1', 2', 3') in such a way that the first shredder (1') delivers treated products (PT1) whose constituent elements have a width of at most 100 mm, preferably at most 80 mm, that the second shredder (2') delivers treated products (PT2) whose constituent elements have a width of at most 30 mm, preferably at most 20 mm and that the third shredder (3') delivers treated products (PT3) whose constituent elements have a width of at most 15 mm, preferably at most 12 mm.

3. Grinding method according to claim 1 or 2, characterized in that it consists of regulating the residence time of the products (MP, PT1, PT2) being treated in each shredder (1', 2', 3') as a function of the quantity of product to be treated (MP, PT1, PT2), for example determined by weighing continues from the first shredder (1') at least, preferably from each shredder (1', 2', 3').

4. Grinding method according to any one of claims 1 to 3, characterized in that it consists of heating the rotating shredding members (12) at least of the shredder (1') of the first grinding station (1), at least during the start-up phases of the shredder concerned.

5. Thermomechanical treatment process for the purpose of recycling raw materials (MP) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste, said process comprising a plurality of successive treatment steps including grinding, dimensional reduction, heating and separation operations, some of which are carried out in a combined manner, and said treatment process being carried out in a continuous or intermittent overall flow, where appropriate regulated, process characterized in that it comprises a first treatment phase corresponding to the process of grinding or fragmenting raw materials (MP) according to any one of claims 1 to 4,said raw materials (RM) having preferably been previously subject to controlled selective recomposition from batches of waste having varied origins and compositions, in terms of the rate of presence and nature of bituminous and non-bituminous materials present.,

6. Installation (4) for crushing or fragmenting raw materials (MP) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste, this installation essentially comprising at least two successive crushing or fragmentation stations (1, 2, 3), configured to reduce the average size according to at least one dimension of the elements forming the bituminous products (MP, PT1, PT2) to be treated by each of them, said installation (4) also comprising, upstream of the first crushing station (1), a raw materials (MP) feed station (5) and, downstream of the last station grinding (3), a station (6) for discharging the treated products (PT3), as well as intermediate transfer means (7, 7') for treated products (PT1, PT2) between two consecutive grinding stations (1, 2; 2, 3), installation (4) characterized in that each of the grinding stations (1, 2, 3), preferably at least three in number, comprises a shredder with rotary shears (T, 2', 3'), in that it comprises means (8) for regulating the residence times, and therefore the treatment times, of the products (MP, PT1, PT2) during their treatment in each shredder (T, 2', 3'), in order to control heating by shearing of said products (MP, PT1, PT2) and in that the intermediate transfer means (7, 7') for treated products (PT1, PT2), from one grinding station (1, 2) to the next grinding station (2, 3) respectively, are configured to limit heat losses.

7. Crushing or fragmentation installation (4) according to claim 6, characterized in that it comprises three consecutive crushing stations (1, 2 and 3), the respective shredders (T, 2', 3') of which are calibrated in such a way that the first shredder (T) delivers treated products (PT1) whose constituent elements have a width of at most 100 mm, preferably at most 80 mm, that the second shredder (2') delivers treated products (PT2) whose constituent elements have a width of at most 30 mm, preferably at most 20 mm and that the third shredder (3') delivers treated products (PT3) whose constituent elements have a width of at most 15 mm, preferably at most 12 mm.

8. Crushing or fragmentation installation (4) according to any one of claims 6 and 7, characterized in that the means (8) for regulating the residence times comprise means for measuring the quantity of product to be treated (MP, PT1, PT2) present in the different shredders (1', 2', 3'), for example in the form of means for continuous weighing of each shredder (1', 2', 3').

9. Crushing or fragmentation installation (4) according to any one of claims 6 to 8, characterized in that the shredders (1', 2', 3') each comprise two parallel rotating shafts, rotating mutually in opposite directions and provided with shredding members of the type knives, the members of one shaft being interpenetrating with those of the other shaft and scrapers being arranged between two neighboring members along the shaft in question, and in that the shredder (1') of the first grinding station (1) at least comprises rotary shredding members (12) equipped with heating means.

10. Crushing or fragmentation installation (4) according to any one of claims 6 to 9, characterized in that it also comprises means (9) for spraying mineral oil and / or mineral powder, such as for example talc, onto the means (7, 7') for intermediate transfer of the treated products (PT1, PT2), for example in the form of belt conveyors with thermal insulation properties. [Claim 1 1] Crushing or fragmentation installation (4) according to any one of claims 6 to 10, characterized in that the lower outlet of the shredder (2') of the second crushing station (2) is arranged in the immediate vicinity of the upper inlet of the shredder (3') of the third crushing station (3), these two crushing stations (2' and 3') being preferably arranged in a mutually superimposed manner.

12. Crushing or fragmentation installation (4) according to any one of claims 6 to 11, characterized in that it also comprises a device (10) for detecting, and where appropriate ejecting, the metal elements or parts present in the treated products (PT2, PT3), located after the second shredder (2') or after the third shredder (3'), for example in the form of a device for detecting and extracting on the fly acting on a moving flow of treated products (PT2, PT3).

13. Crushing or fragmentation installation (4) according to any one of claims 6 to 12, characterized in that the shredder (1') of the first crushing station (1) at least is provided with a rammer (11).

14. Thermomechanical treatment installation for the purpose of recycling raw materials (RM) mainly in the form of bituminous products formed from elements of the membrane type, portions of membranes, shingles or the like, as production, construction or demolition waste, said installation comprising at least means of crushing, dimensional reduction, heating and separation, these means being arranged to form at least one line for processing and extracting material(s) to be recovered, operating in continuous or intermittent flow, where appropriate regulated, installation characterized in that the or each processing and extraction line comprises a first set of means corresponding to an installation (4) for crushing or fragmenting raw materials (MP) according to any one of claims 6 to 13, said installation (4) comprising where appropriate, or possibly being associated with, a site or station for controlled selective composition of said raw materials (MP), this from batches of waste having varied origins and compositions, in terms of rate of presence and nature of bituminous and non-bituminous materials present.

15. Treatment installation according to claim 14, characterized in that the evacuation station (6) of the crushing or fragmentation installation (4) directly supplies at least one heating mixer also forming part of said treatment installation.

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