Asphalt mixture production process

Abstract

The invention relates to the technical field of asphalt production, in particular to an asphalt mixture production process. The production process comprises a full-regeneration production process, a partial-regeneration production process and a full-native production process. In the full-regeneration production process, the regenerated material is preheated and then heated, the heated regenerated material is prepared into a regenerated material finished product, flue gas generated by preheating is purified and then sent to a heating section for primary combustion, and after primary combustion, the flue gas returns to a preheating section for secondary combustion; in the partial regeneration production process, a regenerated material and a raw material are heated respectively and then are used for preparing a partial regeneration finished product; in the whole-native production process, a raw material is heated and then is used for preparing a whole-native finished product. The production process can be flexibly adjusted according to actual production requirements, the production cost is saved, the construction cost is greatly reduced, considerable social benefits and economic benefits are achieved, discharged waste gas meets the emission standard, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt production, and in particular to an asphalt mixture production process. Background Art

[0002] With the rapid development of highway construction in my country, many asphalt roads have entered the period of medium and major repairs, resulting in a large amount of waste asphalt mixtures every year, which not only causes a huge waste of non-renewable material resources, but also seriously pollutes the environment. Therefore, the promotion and application of the recycling technology and equipment of old asphalt pavement has great economic and social benefits.

[0003] Traditional waste asphalt mixture hot regeneration equipment is used together with new asphalt mixture mixing equipment, and the addition ratio is low (less than 50%), which cannot realize the full utilization of waste asphalt mixture. With the continuous development of recycling technology, new recycled materials can fully realize the full regeneration of waste asphalt mixture, but there are still many problems in the process of full regeneration, such as low production efficiency, large asphalt consumption and high environmental pollution. In addition, in the process of full regeneration, due to the need to control the temperature and time of regeneration to avoid asphalt aging, the material temperature often fails to meet the construction requirements, which brings inconvenience to the stable guarantee of construction quality. At the same time, the existing full regeneration process equipment is also difficult to match with the traditional asphalt mixture mixing equipment, the project cost is high, and it also brings limitations to practical application.

[0004] Therefore, an asphalt mixture production process that can stabilize the quality of fully recycled finished materials and reduce production costs, energy conservation and consumption reduction is a problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide an asphalt mixture production process to solve the problems of low production efficiency, high production cost, high environmental pollution in the existing full regeneration process, adhesion, asphalt aging, blue smoke and low material temperature in the asphalt mixture hot regeneration equipment that does not meet the construction requirements.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical scheme: an asphalt mixture production process, including a full recycling process;

[0007] The full regeneration process includes a regenerated material grading system, a regenerated material preheating system, a regenerated material heating system, a first finished material batching system and a first flue gas treatment system;

[0008] The recycled material grading system grades the recycled material, and the graded recycled material is transported to the recycled material preheating system for preheating, and the preheated recycled material is transported to the recycled material heating system for heating, and the heated old asphalt recycled material is transported to the finished product batching system for batching, so as to obtain a fully recycled finished product;

[0009] The flue gas treatment system returns part of the flue gas generated by the recycled material preheating system to the recycled material heating system for primary combustion after purification, and returns the flue gas generated by the recycled material heating system to the recycled material preheating system for secondary combustion, thereby realizing flue gas treatment and utilization.

[0010] Furthermore, the recycled material grading system includes a recycled material silo, and there are multiple recycled material silos. A belt scale is correspondingly arranged under each recycled material silo. The belt scale cooperates with a recycled material aggregate belt conveyor. The recycled material aggregate belt conveyor conveys the recycled material to the recycled material preheating system. The recycled material preheating system includes a drying cylinder I. The recycled material is preheated and dehydrated by the drying cylinder I and then conveyed to the recycled material heating system. The recycled material heating system includes a drying cylinder II. The recycled material is heated by the drying cylinder II and then conveyed to the finished material batching system.

[0011] Furthermore, the first finished product batching system includes an old asphalt recycled material silo, and the recycled material is transported to the old asphalt recycled material silo after being heated by drying cylinder II; the old asphalt recycled material in the old asphalt recycled material silo is added to the mixing tank after being measured, and the additives, mineral powder and asphalt are added to the mixing tank respectively after being measured; the old asphalt recycled material, additives, mineral powder and asphalt are mixed in the mixing tank to obtain a fully recycled finished product.

[0012] Furthermore, the first flue gas treatment system includes a bag dust collector, and the flue gas generated by drying drum I is processed and purified by the bag dust collector, and a portion of it is returned to drying drum II for primary combustion; the flue gas generated by drying drum II is returned to drying drum I for secondary combustion.

[0013] Furthermore, it also includes a partial recycling process, which includes a recycled material grading system, a raw material coarse grading system, a recycled material heating system, a raw material heating system, a raw material fine grading system, a second finished material batching system and a second flue gas treatment system; the recycled material grading system directly transports the graded recycled material to the recycled material heating system, the raw material coarse grading system transports the coarsely graded raw material to the raw material heating system for heating, and the heated raw material is transported to the raw material fine grading system for fine grading; the heated old asphalt recycled material and the finely graded raw material are transported to the second finished material batching system for batching to obtain partially recycled finished products.

[0014] Furthermore, the raw material heating system and the recycled material preheating system share the drying drum I, the raw material coarse grading system transports the coarsely graded raw material to the drying drum I for heating, and the heated raw material is transported to the raw material fine grading system, the raw material fine grading system includes a vibrating screen, a hot aggregate bin is arranged below the vibrating screen, a plurality of sub-bins are arranged in the hot aggregate bin, each sub-bin is used to store raw materials of different particle sizes, the raw materials in each sub-bin are measured and transported to the second finished material batching system, the second finished material batching system and the first finished material batching system share a mixing tank, the old asphalt recycled material, the finely graded raw material, additives, mineral powder and asphalt are added to the mixing tank after being measured for mixing to obtain a partially recycled finished product.

[0015] Furthermore, the second flue gas treatment system shares a bag dust collector with the first flue gas treatment system. After the flue gas generated by drying drum I is treated and purified by the bag dust collector, a portion is returned to drying drum II for primary combustion; the flue gas generated by drying drum II is returned to drying drum I for secondary combustion and / or directly returned to the bag dust collector for treatment.

[0016] Furthermore, it also includes a fully raw process, which includes a raw material coarse grading system, a raw material heating system, a raw material fine grading system, a third finished material batching system and a third flue gas treatment system; the raw material coarse grading system transports the raw material after coarse grading to the raw material heating system for heating, and the heated raw material is transported to the raw material fine grading system for fine grading; the raw material after fine grading is transported to the third finished material batching system for batching, so as to obtain a fully raw finished product.

[0017] Furthermore, the third finished material batching system and the second finished material batching system share a mixing tank, and the finely graded raw materials, additives, mineral powder and asphalt are added to the mixing tank after metering and mixed to obtain a fully raw finished product.

[0018] Furthermore, the third flue gas treatment system and the second flue gas treatment system share a bag dust collector, and the flue gas generated by the drying drum I is directly sent to the exhaust gas treatment section after being purified by the bag dust collector.

[0019] Beneficial effects of the present invention:

[0020] 1. The present invention realizes the grading of recycled materials through a belt scale. In the production process, no secondary screening and measurement is required. Each specification of materials is weighed and proportioned by a belt scale to ensure the quality of the finished asphalt mixture, while improving production efficiency, reducing equipment failure rate, and saving production costs.

[0021] 2. The process of the present invention can not only carry out full recycling production, but also produce partially recycled and fully virgin asphalt mixtures according to production needs. The process is more flexible and convenient for use in production;

[0022] 3. The present invention can greatly shorten the heating time of the recycled material by dehydrating and preheating the recycled material, effectively solve the technical problems of adhesion, asphalt aging and blue smoke in the traditional asphalt mixture hot regeneration equipment, reduce the consumption of asphalt, avoid environmental pollution, overcome the technical shortcomings of low production efficiency and low material temperature that cannot meet the construction requirements in the existing full regeneration production, have high productivity and effectively reduce the operating cost, and can be connected and matched with the integral asphalt mixture mixing equipment, which is more convenient for production and application;

[0023] 4. The present invention is not only conducive to the treatment of waste materials, resource conservation and environmental protection, but also has significant economic and social benefits, effectively saves sand and gravel, asphalt materials and transportation costs of waste materials, is energy-saving and environmentally friendly, can achieve 100% full recycling of waste asphalt mixture, and has a large output and guarantees the quality of asphalt mixture finished products;

[0024] 5. The method of the present invention improves heating efficiency and saves fuel through primary and secondary back-burning of flue gas, and on the other hand, avoids direct emission of harmful gases into the atmosphere to pollute the environment, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall process flow chart of the present invention;

[0026] Figure 2 This is a full regeneration process flow chart of the present invention;

[0027] Figure 3 It is a partial regeneration process flow chart of the present invention;

[0028] Figure 4 This is the full original process flow chart of the present invention.

[0029] The names corresponding to the marks in the figure are:

[0030] 1. Recycled material aggregate belt conveyor; 2. Belt scale; 3. Recycled material bin; 4. Material reversing valve I; 5. Raw material coarse grading system; 6. Feeding belt conveyor; 7. Material reversing valve II; 8. Burner I; 9. Air gate I; 10. Drying drum I; 11. Air gate II; 12. Bag air inlet pipe I; 13. Air gate III; 14. Bag fan; 15. Secondary back-burning air duct; 16. Chimney; 17. Recycled flue gas air duct; 18. Reversing air gate; 19. Bag air inlet pipe II; 20. Hot aggregate elevator; 21. Primary back-burning air duct I; 22. Back-burning pipeline induced draft fan; 23. Primary back-burning air duct II; 24. Mineral powder storage bin; 25. Vibrating screen; 26. Hot aggregate bin; 27. Asphalt metering pump; 28. Asphalt metering device; 29. ​​Hot aggregate metering device; 30. Mineral powder metering device; 31. Mixing tank; 32. Finished product bin; 33. Additive metering pump; 34. Additive metering device; 35. Old asphalt recycled material metering device; 36. Additive storage tank; 37. Old asphalt recycled material bin; 38. Burner II; 39. Drying drum II; 40. Air door IV; 41. Recycled material elevator; 42. Bag dust collector; 43. Air door V. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] like Figure 1-4 As shown, the production process of the present invention includes a full regeneration process, a partial regeneration process and a full original process, and a reasonable selection can be made according to actual production needs.

[0033] like Figure 2 As shown, it is a full regeneration process flow; the full regeneration process flow involves a regeneration silo 3, and there are multiple regeneration silos 3. A belt scale 2 is arranged under each regeneration silo 3. The regenerated material in each regeneration silo 3 is transported to the regeneration material aggregate belt conveyor 1 through the belt scale 2. At this time, the material reversing valve Ⅰ4 is connected with the feeding belt conveyor 6, and the regenerated material on the regeneration material aggregate belt conveyor 1 is transported to the drying cylinder Ⅰ10. A burner Ⅰ8 is arranged in the drying cylinder Ⅰ10. The secondary reburning air duct 15 transports the secondary reburning flue gas to the burner Ⅰ8 through the air door Ⅰ9. The burner Ⅰ8 burns the secondary reburning flue gas again, and the heat generated is used to preheat the regenerated material.

[0034] The preheated recycled material is transported to the recycled material elevator 41 through the material reversing valve Ⅱ7, and then transported to the drying cylinder Ⅱ39 through the recycled material elevator 41. The drying cylinder Ⅱ39 is provided with a burner Ⅱ38. The burner Ⅱ38 burns the primary reburning flue gas in the primary reburning air duct Ⅱ23 again. The heat generated is used to heat and regenerate the recycled material to obtain the old asphalt recycled material.

[0035] The obtained old asphalt recycled material is transported to the old asphalt recycled material silo 37, and then added to the mixing cylinder 31 after being measured by the old asphalt recycled material metering device 35. At the same time, the additive in the additive storage tank 36 is transported to the additive metering device 34 through the additive metering pump 33, and is added to the mixing cylinder 31 after being measured by the additive metering device 34; the mineral powder in the mineral powder storage bin 24 is measured by the mineral powder metering device 30 and added to the mixing cylinder 31; the asphalt is transported to the asphalt metering device 28 through the asphalt metering pump 27, and is added to the mixing cylinder 31 after being measured by the asphalt metering device 28; the above materials are mixed in the mixing cylinder 31 to obtain finished materials, and the finished materials are stored in the finished product silo 32.

[0036] The flue gas generated by the drying cylinder II 39 is connected to the secondary backburning air duct 15 through the regeneration flue gas duct 17 and the reversing damper 18, and the secondary backburning air duct 15 is connected to the burner I8 through the damper I9; the flue gas generated by the drying cylinder I 10 is connected to the bag air inlet duct I 12 through the damper II 11, and the bag air inlet duct I 12 is connected to the bag dust collector 42; the air outlet of the bag dust collector 42 is connected to the chimney 16 through the bag fan 14, and the air outlet is above the chimney 16. The flue gas at the air outlet is discharged after being processed at the rear end. A primary backburning air duct I 21 is arranged on one side above the chimney 16, and the primary backburning air duct I 21 is connected to the backburning pipeline induced draft fan 22 through the damper V 43, and the backburning pipeline induced draft fan 22 is connected to the primary backburning air duct II 23, and the primary backburning air duct II 23 is connected to the drying cylinder II 39 through the damper IV 40.

[0037] like Figure 3 As shown, it is a partial regeneration process flow; in the partial regeneration process flow, the recycled material in the regeneration bin 3 passes through the belt scale 2 and the recycled material collecting belt conveyor 1, and is directly transported to the recycled material elevator 41 through the material reversing valve Ⅰ4. The subsequent operation of this part is consistent with the full regeneration process flow and will not be repeated here.

[0038] The partial recycling process also involves the preparation process of raw materials. The raw material coarse grading system 5 conveys the raw material to the drying drum Ⅰ10 through the feeding belt conveyor 6 (coarse grading is achieved by controlling the speed of the belt conveyor). The raw material is heated in the drying drum Ⅰ10 and then conveyed to the top of the vibrating screen 25 through the material reversing valve Ⅱ7 and the hot aggregate elevator 20. After being screened by the vibrating screen 25, it is stored in the hot aggregate bin 26. The hot aggregate bin is provided with a plurality of sub-bins, which are used to store hot aggregates of different particle sizes obtained after screening. The hot aggregate in the hot aggregate bin 26 is measured by the hot aggregate metering device 29 and then added to the mixing tank 31. The addition of additives, mineral powder and asphalt is the same as the full recycling process and will not be repeated.

[0039] In the partial regeneration process, the circulation of flue gas is somewhat different from that in full regeneration. In addition to the circulation method in the aforementioned full regeneration, in the partial regeneration process, the flue gas generated by the drying drum Ⅱ39 can also be connected to the bag air inlet pipe Ⅱ19 through the regeneration flue gas air duct 17 and the reversing damper 18, and the bag air inlet pipe Ⅱ19 is connected to the bag dust collector 42 through the damper Ⅲ13; it should be noted that in the partial regeneration process, the flue gas can be circulated through the secondary reburning air duct 15 and / or the bag air inlet pipe Ⅱ19.

[0040] like Figure 4 As shown, it is a full-virgin process flow; in the full-virgin process flow, the raw material coarse grading system 5 conveys the raw material to the drying drum Ⅰ10 through the feeding belt conveyor 6, and the raw material is heated in the drying drum Ⅰ10 and conveyed to the top of the vibrating screen 25 through the material reversing valve Ⅱ7 and the hot aggregate elevator 20. After being screened by the vibrating screen 25, it is stored in the hot aggregate bin 26. The hot aggregate in the hot aggregate bin 26 is measured by the hot aggregate metering device 29 and then added to the mixing tank 31. The addition of additives, mineral powder and asphalt is the same as the full recycling process flow and will not be repeated.

[0041] The smoke generated by the drying drum Ⅰ10 is connected to the bag air inlet pipe Ⅰ12 through the air door Ⅱ11, and the bag air inlet pipe Ⅰ12 is connected to the bag dust collector 42; the air outlet of the bag dust collector 42 is connected to the chimney 16 through the bag fan 14, and the top of the chimney 16 is the air outlet, and the smoke at the air outlet is discharged after being processed at the rear end; the air door Ⅰ9, the air door Ⅲ13 and the air door Ⅴ43 are closed.

[0042] Example 1

[0043] This embodiment is a full regeneration production process.

[0044] In this embodiment, the raw material coarse grading system 5 is not in operation, and the recycled material in the recycled material bin 3 is transported to the drying drum Ⅰ10 through the material reversing valve Ⅰ4 and the feeding belt conveyor 6 after metering and aggregation. Under standard conditions, the preheating time is 5 to 6 minutes, and the discharge temperature is controlled at 80 to 100°C. The discharge material is transported to the drying drum Ⅱ39 through the material reversing valve Ⅱ7 and the recycled material elevator 41.

[0045] The recycled material is heated in the drying drum II 39. Under standard conditions, the heating time is 6 to 7 minutes and the discharge temperature is controlled at 150 to 160°C. The discharged material is added to the mixing cylinder 31 after metering. At the same time, metered additives, mineral powder and asphalt are added during stirring. After stirring, fully recycled finished material is obtained.

[0046] Example 2

[0047] This embodiment is a partial regeneration production process.

[0048] In this embodiment, the recycled material in the recycled material bin 3 is directly transported to the drying cylinder II 39 through the material reversing valve I4 and the recycled material elevator 41 after being measured and collected, and is heated in the drying cylinder II 39. Under standard conditions, the heating time is 8 to 10 minutes, and the discharge temperature is controlled at 150 to 160°C.

[0049] The raw material is transported to the drying drum I 10 for heating through the raw material coarse grading system 5. Under standard conditions, the heating time is 5 to 6 minutes, and the discharge temperature is controlled at 150 to 160°C. The heated hot aggregate is screened by the vibrating screen 25 and stored in the hot aggregate bin 26, and finely graded by the hot aggregate metering device 29.

[0050] The heated old asphalt recycled material, the finely graded recycled material, the additive, the mineral powder and the asphalt are added to the mixing tank 31 after being measured, and are stirred in the mixing tank 31 to obtain a part of the recycled finished material.

[0051] Example 3

[0052] This embodiment is a fully native production process.

[0053] In this embodiment, the raw material is transported to the drying drum I10 for heating via the raw material coarse grading system 5. Under standard conditions, the heating time is 5 to 6 minutes, and the discharge temperature is controlled at 150 to 160°C. The heated hot aggregate is screened by the vibrating screen 25 and stored in the hot aggregate bin 26, and finely graded by the hot aggregate metering device 29.

[0054] The finely graded recycled materials, additives, mineral powder and asphalt are added to the mixing tank 31 after being measured, and are mixed in the mixing tank 31 to obtain fully virgin finished materials.

[0055] The various devices involved in the technical solution of the present invention, such as the belt scale 2, the metering device, the material reversing valve, the drying cylinder, the damper, the bag dust collector 42, the pump, the fan, the elevator, etc. are all existing mature equipment, which are not difficult to understand for those skilled in the art, and the structure and principle will not be described in detail; the technical solution of the present invention also involves mineral powder and additives, and in actual production, the types and proportions thereof are different according to different products, which are not difficult to understand for those skilled in the art, and will not be described in detail.

[0056] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A process for producing asphalt mixture, characterized in that: Including full regeneration process; The full regeneration process includes a regenerated material grading system, a regenerated material preheating system, a regenerated material heating system, a first finished material batching system and a first flue gas treatment system; The recycled material grading system grades the recycled material, and the graded recycled material is transported to the recycled material preheating system for preheating, and the preheated recycled material is transported to the recycled material heating system for heating, and the heated old asphalt recycled material is transported to the finished product batching system for batching, so as to obtain a fully recycled finished product; The flue gas treatment system returns part of the flue gas generated by the recycled material preheating system to the recycled material heating system for primary combustion after purification, and returns the flue gas generated by the recycled material heating system to the recycled material preheating system for secondary combustion, thereby realizing flue gas treatment and utilization.

2. The asphalt mixture production process according to claim 1, characterized in that: The recycled material grading system includes a recycled material bin (3), wherein a plurality of recycled material bins (3) are provided, and a belt scale (2) is provided under each recycled material bin (3). The belt scale (2) cooperates with a recycled material aggregate belt conveyor (1), and the recycled material aggregate belt conveyor (1) conveys the recycled material to a recycled material preheating system. The recycled material preheating system includes a drying cylinder I (10), and the recycled material is preheated and dehydrated by the drying cylinder I (10) and then conveyed to the recycled material heating system. The recycled material heating system includes a drying cylinder II (39), and the recycled material is heated by the drying cylinder II (39) and then conveyed to the finished material batching system.

3. The asphalt mixture production process according to claim 2, characterized in that: The first finished product batching system comprises an old asphalt recycled material silo (37), the recycled material is heated by a drying drum II (39) and then transported to the old asphalt recycled material silo (37); the old asphalt recycled material in the old asphalt recycled material silo (37) is added to the mixing tank (31) after being measured, and the additive, mineral powder and asphalt are added to the mixing tank (31) after being measured respectively; The old asphalt recycled material, additives, mineral powder and asphalt are mixed in a mixing tank (31) to obtain a fully recycled finished product.

4. The asphalt mixture production process according to claim 3, characterized in that: The first flue gas treatment system includes a bag filter (42). After the flue gas generated by the drying cylinder I (10) is treated and purified by the bag filter (42), a portion of the flue gas is returned to the drying cylinder II (39) for primary combustion; the flue gas generated by the drying cylinder II (39) is returned to the drying cylinder I (10) for secondary combustion.

5. The asphalt mixture production process according to claim 4, characterized in that: The invention also includes a partial recycling process, which includes a recycled material grading system, a raw material coarse grading system (5), a recycled material heating system, a raw material heating system, a raw material fine grading system, a second finished material batching system and a second flue gas treatment system; the recycled material grading system directly transports the graded recycled material to the recycled material heating system, the raw material coarse grading system (5) transports the coarsely graded raw material to the raw material heating system for heating, and the heated raw material is transported to the raw material fine grading system for fine grading; the heated old asphalt recycled material and the finely graded raw material are transported to the second finished material batching system for batching, so as to obtain a partially recycled finished product.

6. The asphalt mixture production process according to claim 5, characterized in that: The raw material heating system and the recycled material preheating system share a drying drum I (10); the raw material coarse grading system (5) transports the raw material after coarse grading to the drying drum I (10) for heating; the heated raw material is transported to the raw material fine grading system; the raw material fine grading system comprises a vibrating screen (25); a hot aggregate bin (26) is arranged below the vibrating screen (25); a plurality of sub-bins are arranged in the hot aggregate bin (26); each sub-bin is used to store raw materials of different particle sizes; the raw materials in each sub-bin are measured and transported to the second finished material batching system; the second finished material batching system and the first finished material batching system share a mixing tank (31); the old asphalt recycled material, the raw material after fine grading, additives, mineral powder and asphalt are measured and added to the mixing tank (31) for mixing to obtain a partially recycled finished product.

7. The asphalt mixture production process according to claim 6, characterized in that: The second flue gas treatment system shares a bag filter (42) with the first flue gas treatment system. The flue gas generated by drying cylinder I (10) is treated and purified by the bag filter (42), and a portion of it is returned to drying cylinder II (39) for primary combustion; the flue gas generated by drying cylinder II (39) is returned to drying cylinder I (10) for secondary combustion and / or directly returned to the bag filter (42) for treatment.

8. The asphalt mixture production process according to any one of claims 1 to 7, characterized in that: The invention also includes a fully raw process, which includes a raw material coarse grading system (5), a raw material heating system, a raw material fine grading system, a third finished material batching system and a third flue gas treatment system; the raw material coarse grading system (5) transports the raw material after coarse grading to the raw material heating system for heating, and the heated raw material is transported to the raw material fine grading system for fine grading; the raw material after fine grading is transported to the third finished material batching system for batching, so as to obtain a fully raw finished product.

9. The asphalt mixture production process according to claim 8, characterized in that: The third finished material batching system and the second finished material batching system share a mixing tank (31), and the finely graded raw materials, additives, mineral powder and asphalt are added to the mixing tank (31) after being measured and mixed to obtain a fully raw finished product.

10. The asphalt mixture production process according to claim 9, characterized in that: The third flue gas treatment system and the second flue gas treatment system share a bag filter (42). The flue gas generated by the drying drum I (10) is purified by the bag filter (42) and then goes directly to the tail gas treatment section.

Images