Production process of low-carbon solid waste concrete

Abstract

The invention relates to a low-carbon solid waste concrete production process, which comprises: primary crushing: crushing hard raw materials and soft raw materials through a crusher to obtain soft raw material particles and hard raw material particles, the soft raw materials comprising desulfurized gypsum and fly ash, and the hard raw materials comprising coal gangue and steel slag; the hard raw material particles and the soft raw material particles are added into a ball mill to be mixed and ground, a ground mixture is obtained, a grinding inner cavity of the ball mill is divided into a plurality of grinding areas in the direction from a feeding port to a discharging port, the hard raw material particles are fed from the feeding port of the ball mill, and the soft raw material particles are fed from the discharging port of the ball mill; the soft raw material particles are fed into the corresponding grinding areas; and stirring and mixing: adding the recycled aggregate, the auxiliary agent and the water into the ground mixture, and stirring to prepare the solid waste concrete. The ball mill has the effect of improving the use energy consumption of the ball mill.

Description

Technical Field

[0001] The present application relates to the technical field of concrete production technology, and in particular to a low-carbon solid waste concrete production technology. Background Art

[0002] With the acceleration of industrialization, more and more waste is generated in industrial production. The treatment of these wastes has become a major problem for enterprises. The use of solid waste to produce concrete provides a solution to this problem, while also achieving energy conservation, emission reduction and low-carbon production. Based on the solid waste concrete process, the full solid waste concrete production process has been further developed in recent years, thus achieving the maximum utilization of solid waste.

[0003] The solid wastes mainly used in the all-solid waste concrete process now include steel slag, desulfurization gypsum, tailings sand and gravel, water-quenched slag, fly ash, etc. During production, it is necessary to crush the different wastes according to their properties and characteristics through crushing equipment to process different solid wastes into particles that meet the requirements, and then mix the various raw materials in proportion and put them into the ball mill for grinding. Finally, they are mixed and stirred with additives and water in appropriate proportions to make concrete.

[0004] Regarding the above-mentioned related technologies, the hard raw materials include coal gangue and steel slag, and the soft raw materials include desulfurized gypsum. The inventor puts a variety of solid waste raw materials into a ball mill for grinding. Due to the different hardness and softness of the hard raw materials, the grinding time of the hard raw materials and the soft raw materials in the ball mill is also different. The soft raw materials are quickly ground into powder in the ball mill, but cannot be discharged directly, and can only go through a complete grinding process together with the hard raw materials. This increases the energy consumption of the ball mill, so there is room for certain improvements. Summary of the invention

[0005] In order to improve the energy consumption of ball mills, the present application provides a low-carbon solid waste concrete production process.

[0006] The low-carbon solid waste concrete production process provided in this application adopts the following technical solution: A low-carbon solid waste concrete production process, comprising: Preliminary crushing: crushing the hard raw materials and soft raw materials by crushing them separately to obtain soft raw material particles and hard raw material particles. The soft raw materials include desulfurized gypsum and fly ash, and the hard raw materials include coal gangue and steel slag. Mixed grinding: adding hard raw material particles and soft raw material particles into a ball mill for mixed grinding to obtain a ground mixed material, wherein the grinding inner cavity of the ball mill is divided into several grinding areas along the direction from the feed inlet to the discharge outlet, the hard raw material particles are fed into the ball mill from the feed inlet, and the soft raw material particles are fed into the corresponding grinding areas; Stirring and mixing: Add recycled aggregate, additives and water to the ground mixture and stir to make solid waste concrete.

[0007] Preferably, the ball mill comprises a base, a shell, and a feed shaft and a discharge shaft at two ends of the shell respectively, the feed shaft and the discharge shaft are rotatably mounted on the base, and a driving component for driving the shell to rotate is provided on the base; A grinding inner cavity is arranged in the shell, a feed port communicating with the grinding inner cavity is arranged on the feed shaft, a discharge port communicating with the grinding inner cavity is arranged on the discharge shaft, at least one grinding grate is arranged in the grinding inner cavity, and the grinding inner cavity is divided into a plurality of grinding areas along the direction from the feed port to the discharge port by the grinding grate; a push conveyor is arranged on the base, and the push conveyor penetrates into the grinding inner cavity from the discharge port or the feed port to communicate with the grinding area.

[0008] Preferably, the driving assembly includes a driving motor and a driving shaft, the driving shaft is rotatably mounted on the base, the output shaft of the driving motor is connected to the driving shaft, a linkage gear is mounted on the housing, and a driving gear meshing with the linkage gear is mounted on the driving shaft.

[0009] Preferably, the push conveyor comprises a conveying cylinder, a conveying motor, and a screw propulsion shaft, the conveying cylinder is provided with a feeding port and at least one feeding port, both ends of the screw propulsion shaft are rotatably mounted on the conveying cylinder, the conveying motor is fixed on the conveying cylinder, and the output shaft of the conveying motor is connected to the screw propulsion shaft; The conveying cylinder is arranged along the axial direction line of the shell, the conveying cylinder passes through the center position of the grinding grate plate, and the conveying cylinder is installed on the grinding grate plate through the rotating part; The number of the feed ports is the same as the number of the grinding areas, and each feed port is connected to each grinding area. An opening and closing plate for opening and closing the feed ports is slidably mounted on the conveying cylinder, and an opening and closing electric cylinder for driving the opening and closing plate to slide is provided on the conveying cylinder.

[0010] Preferably, the rotating part includes a rotating inner ring and a rotating outer ring, the rotating inner ring is sleeved and fixed on the conveying cylinder, the rotating outer ring is sleeved outside the rotating inner ring, the rotating outer ring is fixed at the center position of the grinding grate plate, and a plurality of balls are arranged at intervals along the circumferential direction at the position where the rotating inner ring contacts the rotating outer ring.

[0011] Preferably, the rotating inner circle includes a rotating upper half circle and a rotating lower half circle which are spliced ​​together, and blocks are provided at both ends of the rotating lower half circle, and grooves matching the blocks are provided at both ends of the rotating lower half circle, and a locking screw is provided on the rotating lower half circle which passes through the groove and is threadedly connected to the block.

[0012] Preferably, the outer circumferential surface of the rotating inner ring is provided with installation openings spaced apart along its circumferential direction, the roller is located in the installation openings, the outer circumferential surface of the rotating inner ring is covered and fixed with a wear-resistant metal sheet, and the wear-resistant metal sheet is provided with an installation bayonet for limiting the position of the roller.

[0013] Preferably, limiting convex edges extending in the radial direction are arranged on both sides of the inner circumference of the rotating outer ring, and limiting grooves for embedding the limiting convex edges are arranged on both sides of the outer circumference of the rotating inner ring, and a mounting groove for mounting the outer circumference of the rotating inner ring is formed on the inner circumference of the rotating outer ring through the two limiting convex edges; A mounting flange is formed on the outer circumferential surface of the rotating outer ring, and the mounting flange is fixed to the grinding grate plate by mounting bolts.

[0014] Preferably, a blowing air channel is provided in the rotating outer ring, one end of the blowing air channel is communicated with the end surface of the rotating outer ring, and the other end of the blowing air channel is communicated with the contact surface between the rotating outer ring and the rotating inner ring; At least one blow cylinder is arranged on the rotating outer ring, an air inlet and an air outlet are arranged on the inner cavity of the blow cylinder, the air outlet is communicated with one end of the blowing flow channel, an air inlet check valve is installed on the air inlet, an air outlet check valve is installed on the air outlet, a piston is arranged in the blow cylinder, and a connecting rod is arranged in the middle of the piston; A linkage ring is arranged on the end surface of the rotating inner ring, and a linkage ring groove is opened on the outer circumferential surface of the linkage ring. The linkage ring groove is arranged in a wave shape in the circumferential direction, and the end of the connecting rod cooperates with the linkage ring groove.

[0015] Preferably, the linkage ring groove is arranged in an I-shape, the connecting rod extends into the linkage ring groove, and a linkage roller cooperating with the linkage ring groove is rotatably mounted on the end of the connecting rod.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, the hard raw material particles are fed from the feed port of the ball mill, and the soft raw material particles are fed into the corresponding grinding area. By changing the grinding position of the soft raw material particles in the ball mill, the grinding time of the soft raw material particles in the ball mill is changed, so that the hard raw material particles are first ground for a period of time, and then the soft raw material particles are added for grinding. At this time, the soft raw material particles do not need to be ground for a long time with the hard raw material particles, which improves the energy consumption of the ball mill to a certain extent; 2. Grinding soft raw material particles and hard raw material particles together can improve the grinding efficiency of the ball mill and further reduce the energy consumption of the ball mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of the low-carbon solid waste concrete production process.

[0018] Figure 2 It is a structural diagram of a ball mill.

[0019] Figure 3 It is a schematic diagram of the installation of the opening and closing plate.

[0020] Figure 4 It is the installation diagram of the conveying cylinder.

[0021] Figure 5 It is a structural schematic diagram of the rotating part.

[0022] Figure 6 It is a first installation diagram of a rotating inner ring and a rotating outer ring.

[0023] Figure 7 2 is a schematic diagram of the second structure of the rotating inner ring and the rotating outer ring.

[0024] Figure 8 This is a schematic diagram of the installation of the air cylinder.

[0025] Description of reference numerals: 1. base; 2. shell; 3. grinding inner cavity; 4. feed shaft; 5. discharge shaft; 6. feed port; 7. discharge port; 8. grinding area; 9. drive assembly; 91. drive motor; 92. drive shaft; 93. linkage gear; 94. drive gear; 10. grinding grate plate; 11. mounting ring; 12. propulsion conveyor; 121. conveying cylinder; 122. conveying motor; 123. screw propulsion shaft; 124. feed port; 125. feed port; 126. feed hopper; 13. mounting hole; 14. rotating part; 141. rotating inner ring; 142. Rotating outer ring; 143. Ball bearing; 144. Embedded block; 145. Embedded groove; 146. Mounting opening; 147. Wear-resistant metal sheet; 148. Mounting bayonet; 149. Mounting convex edge; 150. Limiting convex edge; 151. Limiting groove; 152. Mounting groove; 15. Opening and closing plate; 16. Opening and closing electric cylinder; 17. Protective shell; 18. Blowing air duct; 19. Blowing cylinder; 20. Inlet check valve; 21. Air filter head; 22. Exhaust check valve; 23. Piston; 24. Connecting rod; 25. Linkage ring; 26. Linkage ring groove; 27. Linkage roller. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-8 This application is described in further detail.

[0027] A low-carbon solid waste concrete production process, referring to Figure 1 As shown, including: Preliminary crushing: The hard raw materials and soft raw materials are crushed separately by a crusher to obtain soft raw material particles and hard raw material particles. The soft raw materials include desulfurized gypsum and fly ash, and the hard raw materials include coal gangue and steel slag.

[0028] In the preliminary crushing step, the hard raw material and the soft raw material are crushed by a crusher. The hard raw material and the soft raw material have different textures and properties, and the types of crushers used are also different. The crusher can be a jaw crusher, an impact crusher or a roller crusher. The soft raw material is crushed to obtain soft raw material particles with a maximum particle size of ≤4mm. The hard raw material in this embodiment does not require a maximum particle size, but only requires that it can enter the ball mill in the subsequent mixed grinding.

[0029] It is worth noting that the soft raw materials and hard raw materials in this application are only relative, and do not limit the specific degree of softness and hardness. In this application, coal gangue and steel slag are defined as hard raw materials, and desulfurized gypsum and fly ash are defined as soft raw materials.

[0030] Mixed grinding: Add hard raw material particles and soft raw material particles into a ball mill for mixed grinding to obtain a ground mixture, wherein the grinding inner cavity 3 of the ball mill is divided into several grinding areas 8 along the direction from the feed port 6 to the discharge port 7, the hard raw material particles are fed into the ball mill from the feed port 6, and the soft raw material particles are fed into the corresponding grinding areas 8.

[0031] In the mixed grinding step, in the present application, the hard raw material particles are fed from the feed port 6 of the ball mill, and the soft raw material particles are fed into the corresponding grinding area 8. By changing the grinding position of the soft raw material particles in the ball mill, the grinding time of the soft raw material particles in the ball mill is changed, so that the hard raw material particles are first ground for a period of time, and then the soft raw material particles are added for grinding. At this time, the soft raw material particles do not need to be ground for a long time with the hard raw material particles, thereby reducing the grinding weight of the ball mill, so as to improve the energy consumption of the ball mill to a certain extent, and the soft raw material particles and the hard raw material particles are fed into the ball mill together for grinding, which can improve the grinding efficiency.

[0032] Stirring and mixing: Add recycled aggregate, additives and water to the ground mixture and stir to make solid waste concrete.

[0033] The soft raw material particles and the hard raw material particles are fed into the ball mill according to a predetermined ratio to grind the mixture. In the stirring and mixing step, the auxiliary agent includes a water reducer, and the recycled aggregate includes recycled fine aggregate with a particle size of 3 to 8 mm and recycled coarse aggregate with a particle size of 25 to 30 mm. Combined with the properties of coal gangue, steel slag, fly ash, and desulfurized gypsum, in this embodiment, the solid waste concrete has the following weight parts: 150 to 190 parts of coal gangue, 115 to 140 parts of steel slag, 140 to 160 parts of fly ash, 58 to 70 parts of desulfurized gypsum, 800 to 900 parts of recycled aggregate, 10 to 15 parts of water reducer, and 145 to 170 parts of water.

[0034] In a ball mill, the grinding time of hard raw material particles is more than 20 minutes, and the grinding time of soft raw material particles is 8 to 13 minutes to meet the requirements. In order to achieve the above grinding requirements, the specific structure of the ball mill is described in detail below.

[0035] Reference Figure 2 As shown, the ball mill includes a base 1 and a shell 2. The base 1 is set on the ground. The shell 2 is cylindrical as a whole. A grinding cavity 3 is set in the shell 2. A feed shaft 4 and a discharge shaft 5 are fixedly set at both ends of the shell 2. The feed shaft 4 and the discharge shaft 5 are located on the axial direction line of the shell 2. A feed port 6 communicating with the grinding cavity 3 is set on the feed shaft 4. A discharge port 7 communicating with the grinding cavity 3 is set on the discharge shaft 5. The feed port 6 axially passes through both ends of the feed shaft 4, and the discharge port 7 axially passes through both ends of the discharge shaft 5.

[0036] The feed shaft 4 and the discharge shaft 5 are rotatably mounted on the base 1, that is, bearings are mounted on the feed shaft 4 and the discharge shaft 5, and the feed shaft 4 and the discharge shaft 5 are mounted on the base 1 through the bearings, thereby realizing the rotation of the shell 2 on the base 1, wherein, after the shell 2 is mounted on the base 1, the shell 2 is inclined at 8°-15° along the direction from the feed shaft 4 to the discharge shaft 5, so that the hard raw material particles and the soft raw material particles in the shell 2 can move from the feed port 6 to the discharge port 7 side.

[0037] A driving assembly 9 for driving the housing 2 to rotate is provided on the base 1. In one embodiment, the driving assembly 9 includes a driving motor 91 and a driving shaft 92. The driving shaft 92 is rotatably mounted on the base 1. The output shaft of the driving motor 91 is connected to the driving shaft 92 through a coupling. The output shaft of the driving motor 91 can also be connected to a reducer, and connected to the driving shaft 92 through the reducer. A linkage gear 93 is installed on the housing 2. The linkage gear 93 is sleeved outside the housing 2. A driving gear 94 meshing with the linkage gear 93 is installed on the driving shaft 92. There are two linkage gears 93 and two driving gears 94, and the two linkage gears 93 are arranged near the two ends of the housing 2.

[0038] At least one grinding grate plate 10 is arranged in the grinding inner cavity 3, and the grinding inner cavity 3 is divided into a plurality of grinding areas 8 along the direction from the feed port 6 to the discharge port 7 by the grinding grate plate 10, and a grinding steel ball is placed in each grinding area 8. In one embodiment, three grinding grate plates 10 are arranged, one grinding grate plate 10 covers the discharge port 7, and two grinding grate plates 10 are arranged in the grinding inner cavity 3 at intervals.

[0039] The grinding grate plate 10 is provided with through holes, and the through holes of the grinding grate plate 10 along the direction from the feed port 6 to the discharge port 7 gradually increase, that is, the through hole diameter on the grinding grate plate 10 close to the feed port 6 is larger than the through hole diameter on the grinding grate plate 10 close to the discharge port 7. Therefore, when the hard raw material particles and the soft raw material particles are put into the grinding area 8, they are tumbled by the shell 2, and the grinding steel balls grind the hard raw material particles and the soft raw material particles, and the hard raw material particles and the soft raw material particles that meet the through hole diameter will enter the next grinding area 8 until the hard raw material particles and the soft raw material particles meet the particle size requirements and are discharged through the discharge port 7.

[0040] It is worth noting that the size of the grinding area 8 can be changed by adjusting the position of the grinding grate plate 10 in the grinding inner cavity 3. A mounting ring 11 is fixed on the outer circumference of the grinding grate plate 10, and a plurality of mounting threaded holes are arranged at intervals on the inner wall of the housing 2. The mounting ring 11 is fixed to the mounting threaded holes of the housing 2 by mounting bolts, so that the position of the grinding grate plate 10 can be changed to adjust the size of the grinding area 8.

[0041] In order to enable the soft raw material particles to be added to any grinding area 8 , a push conveyor 12 is provided on the base 1 in the present application. The push conveyor 12 penetrates from the discharge port 7 or the feed port 6 into the grinding inner cavity 3 to communicate with the grinding area 8 .

[0042] Reference Figure 2 and Figure 3 As shown, the propulsion conveyor 12 includes a conveying cylinder 121, a conveying motor 122, and a screw propulsion shaft 123. The conveying cylinder 121 is provided with a feeding port 124 and at least one feeding port 125. The screw propulsion shaft 123 is arranged in the conveying cylinder 121. Both ends of the screw propulsion shaft 123 are rotatably mounted on the conveying cylinder 121. The conveying motor 122 is fixed on the conveying cylinder 121. The output shaft of the conveying motor 122 is connected to the screw propulsion shaft 123. The conveying cylinder 121 is arranged along the axial direction line of the shell 2. The conveying cylinder 121 passes through the center position of the grinding grate plate 10. The center position of the grinding grate plate 10 is provided with a mounting hole 13 for the conveying cylinder 121 to pass through. The conveying cylinder 121 is mounted on the mounting hole 13 of the grinding grate plate 10 through the rotating part 14.

[0043] The number of the feeding ports 125 is the same as the number of the grinding areas 8. The feeding ports 125 are spaced apart and start on the conveying cylinder 121 and communicate with the inner cavity of the conveying cylinder 121. Each feeding port 125 communicates with each grinding area 8. An opening and closing plate 15 for opening and closing the feeding ports 125 is slidably mounted on the conveying cylinder 121. An opening and closing electric cylinder 16 for driving the opening and closing plate 15 to slide is arranged on the conveying cylinder 121. The power supply line of the opening and closing electric cylinder 16 is led out of the housing 2 along the side wall of the conveying cylinder 121. A protective shell 17 covering the opening and closing electric cylinder 16 is arranged outside the conveying cylinder 121, so as to isolate the smoke and grinding steel balls in the grinding area 8.

[0044] A feeding hopper 126 is provided on the feeding port 124 , and the feeding hopper 126 is provided outside the discharge port 7 . A mounting bracket is provided on the base 1 to be fixed on the conveying cylinder 121 , the conveying motor 122 and the feeding hopper 126 to support and fix the pushing conveyor 12 .

[0045] Thus, by feeding the soft raw material particles from the feeding hopper 126 into the conveying cylinder 121, the grinding time of the soft raw material particles is determined according to the properties of the soft raw material particles. For example, if the soft raw material particles need to be ground for 15 minutes, only the opening and closing plate 15 of the first grinding area 8 is opened, and the soft raw material particles are fed into the first grinding area 8. If the soft raw material particles need to be ground for 10 minutes, only the opening and closing plate 15 of the second grinding area 8 is opened, and the soft raw material particles are fed into the second grinding area 8. If the soft raw material particles need to be ground for 5 minutes, only the opening and closing plate 15 of the third grinding area 8 is opened, and the soft raw material particles are fed into the third grinding area 8.

[0046] The shell 2 rotates under the drive of the driving assembly 9. Under the action of the rotating part 14, the conveying cylinder 121 remains on the axial direction line of the shell 2 and does not rotate. Only the shell 2 rotates around the conveying cylinder 121, and the conveying cylinder 121 is at the center position of the shell 2. The grinding steel ball will not greatly contact the conveying cylinder 121 when rolling, and the opening and closing plate 15 is on the lower surface of the conveying cylinder 121, and the grinding steel ball will not cause collision impact to the opening and closing plate 15.

[0047] The structure of the rotating portion 14 will be described in detail below.

[0048] Reference Figure 4 , Figure 5 and Figure 7 As shown, the rotating part 14 includes a rotating inner ring 141 and a rotating outer ring 142. The rotating inner ring 141 is sleeved and fixed on the conveying cylinder 121, and the rotating outer ring 142 is sleeved outside the rotating inner ring 141. The rotating outer ring 142 is fixed on the mounting hole 13 at the center position of the grinding grate plate 10. A plurality of balls 143 are arranged at intervals along the circumferential direction at the position where the rotating inner ring 141 and the rotating outer ring 142 contact each other.

[0049] The rotating inner ring 141 includes an upper half circle and a lower half circle that are spliced ​​together. Blocks 144 are provided at both ends of the lower half circle. Grooves 145 that cooperate with the blocks 144 are provided at both ends of the lower half circle. The lower half circle is provided with locking screws that pass through the grooves 145 and are threadedly connected to the blocks 144. By splicing and fixing the upper half circle and the lower half circle, any position of the conveying cylinder 121 can be selected for fixing to meet the installation requirements of the adjustable position of the grinding grate plate 10.

[0050] The outer circumferential surface of the rotating inner ring 141 is provided with installation openings 146 at intervals along the circumferential direction thereof, and the balls 143 are located in the installation openings 146. The outer circumferential surface of the rotating inner ring 141 is covered and fixed with a wear-resistant metal sheet 147, and the wear-resistant metal sheet 147 is provided with an installation bayonet 148 for limiting the position of the roller. The wear-resistant metal sheet 147 can be fixed to the rotating inner ring 141 by screws or by welding.

[0051] Reference Figure 6 and Figure 7 As shown, the rotating outer ring 142 is divided into two upper and lower outer half rings, and a mounting flange 149 is formed on the outer circumferential surface of the rotating outer ring 142. The mounting flange 149 is fixed to the grinding grate plate 10 by mounting bolts.

[0052] Limiting ridges 150 extending in the radial direction are arranged on both sides of the inner circumferential surface of the rotating outer ring 142, and limiting grooves 151 for embedding the limiting ridges 150 are arranged on both sides of the outer circumferential surface of the rotating inner ring 141. A mounting groove 152 for mounting the outer circumferential surface of the rotating inner ring 141 is formed on the inner circumferential surface of the rotating outer ring 142 through the two limiting ridges 150. The wear-resistant metal sheet 147 and the ball 143 are located in the mounting groove 152 and fit with the bottom of the mounting groove 152.

[0053] By setting the limiting convex edge 150 and the limiting groove 151, on the one hand, the conveying cylinder 121 can be limited in the axial direction. On the other hand, the hard raw material particles and the soft raw material particles generate dust after grinding. The limiting convex edge 150 and the limiting groove 151 can limit the dust from directly entering the contact surface between the rotating outer ring 142 and the rotating inner ring 141 to a certain extent.

[0054] In order to further reduce the dust on the contact surface between the rotating outer ring 142 and the rotating inner ring 141. Figure 8 As shown, a blowing channel 18 is opened in the rotating outer ring 142 , one end of the blowing channel 18 is communicated with the end surface of the rotating outer ring 142 , and the other end of the blowing channel 18 is communicated with the contact surface between the rotating outer ring 142 and the rotating inner ring 141 .

[0055] At least one blowing cylinder 19 is arranged on the rotating outer ring 142, and an air inlet and an air outlet are arranged on the inner cavity of the blowing cylinder 19. The air outlet is communicated with one end of the blowing flow channel 18, an air inlet check valve 20 is installed on the air inlet, and an air filter head 21 is arranged on the end of the air inlet check valve 20 contacting the outside, and an air outlet check valve 22 is installed on the air outlet. A piston 23 is arranged in the blowing cylinder 19, and a connecting rod 24 is arranged in the middle position of the piston 23.

[0056] A linkage ring 25 is arranged on the end face of the rotating inner ring 141. The linkage ring 25 is the same as the rotating inner ring 141. The linkage ring 25 is divided into an upper half circle and a lower half circle that are spliced ​​together. The linkage ring 25 is fixed to the end face of the rotating inner ring 141 by screws. A linkage ring groove 26 is opened on the outer circumferential surface of the linkage ring 25. The linkage ring groove 26 is arranged in a wave shape in the circumferential direction, and the end of the connecting rod 24 cooperates with the linkage ring groove 26.

[0057] It is worth noting that the linkage annular groove 26 is arranged in an I-shape, the connecting rod 24 extends into the linkage annular groove 26, and the end of the connecting rod 24 is rotatably mounted with a linkage roller 27 that cooperates with the linkage annular groove 26. Therefore, when the rotating outer ring 142 rotates around the rotating inner ring 141, which is different from the rotating inner ring 141, the linkage roller 27 rolls along the wavy linkage annular groove 26, and drives the piston 23 to move axially in the blowing cylinder 19 through the connecting rod 24, so that the blowing cylinder 19 pumps gas into the blowing flow channel 18, and blows the contact surface between the rotating outer ring 142 and the rotating inner ring 141 through the blowing flow channel 18, thereby improving the dust accumulation on the contact surface between the rotating outer ring 142 and the rotating inner ring 141.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-carbon solid waste concrete production process, characterized in that: include: Preliminary crushing: crushing the hard raw materials and soft raw materials by crushing them separately to obtain soft raw material particles and hard raw material particles. The soft raw materials include desulfurized gypsum and fly ash, and the hard raw materials include coal gangue and steel slag. Mixed grinding: adding hard raw material particles and soft raw material particles into a ball mill for mixed grinding to obtain a ground mixed material, wherein the grinding inner chamber (3) of the ball mill is divided into a plurality of grinding areas (8) along the direction from the feed inlet (6) to the discharge outlet (7), the hard raw material particles are fed into the ball mill from the feed inlet (6), and the soft raw material particles are fed into the corresponding grinding areas (8); Stirring and mixing: Add recycled aggregate, additives and water to the ground mixture and stir to make solid waste concrete.

2. A low-carbon solid waste concrete production process according to claim 1, characterized in that: The ball mill comprises a base (1), a shell (2), and a feed shaft (4) and a discharge shaft (5) respectively disposed at two ends of the shell (2); the feed shaft (4) and the discharge shaft (5) are rotatably mounted on the base (1); and a driving component (9) for driving the shell (2) to rotate is disposed on the base (1); A grinding inner cavity (3) is arranged in the shell (2); a feed port (6) communicating with the grinding inner cavity (3) is arranged on the feed shaft (4); a discharge port (7) communicating with the grinding inner cavity (3) is arranged on the discharge shaft (5); at least one grinding grate plate (10) is arranged in the grinding inner cavity (3); and the grinding inner cavity (3) is divided into a plurality of grinding areas (8) along the direction from the feed port (6) to the discharge port (7) by the grinding grate plate (10); The base (1) is provided with a push conveyor (12), and the push conveyor (12) penetrates from the discharge port (7) or the feed port (6) into the grinding inner cavity (3) to communicate with the grinding area (8).

3. A low-carbon solid waste concrete production process according to claim 2, characterized in that: The driving assembly (9) comprises a driving motor (91) and a driving shaft (92); the driving shaft (92) is rotatably mounted on the base (1); an output shaft of the driving motor (91) is connected to the driving shaft (92); a linkage gear (93) is mounted on the housing (2); and a driving gear (94) meshing with the linkage gear (93) is mounted on the driving shaft (92).

4. A low-carbon solid waste concrete production process according to claim 2, characterized in that: The propulsion conveyor (12) comprises a conveying cylinder (121), a conveying motor (122), and a screw propulsion shaft (123); the conveying cylinder (121) is provided with a feeding port (124) and at least one feeding port (125); both ends of the screw propulsion shaft (123) are rotatably mounted on the conveying cylinder (121); the conveying motor (122) is fixed on the conveying cylinder (121); and the output shaft of the conveying motor (122) is connected to the screw propulsion shaft (123); The conveying cylinder (121) is arranged along the axial direction line of the shell (2), the conveying cylinder (121) passes through the center position of the grinding grate plate (10), and the conveying cylinder (121) is installed on the grinding grate plate (10) through the rotating part (14); The number of the feeding ports (125) is the same as the number of the grinding areas (8), and each of the feeding ports (125) is communicated with each of the grinding areas (8). An opening and closing plate (15) for opening and closing the feeding ports (125) is slidably mounted on the conveying cylinder (121), and an opening and closing electric cylinder (16) for driving the opening and closing plate (15) to slide is arranged on the conveying cylinder (121).

5. A low-carbon solid waste concrete production process according to claim 4, characterized in that: The rotating part (14) comprises a rotating inner ring (141) and a rotating outer ring (142); the rotating inner ring (141) is sleeved and fixed on the conveying cylinder (121); the rotating outer ring (142) is sleeved outside the rotating inner ring (141); the rotating outer ring (142) is fixed at the center of the grinding grate plate (10); and a plurality of balls (143) are arranged at intervals along the circumferential direction of the position where the rotating inner ring (141) contacts the rotating outer ring (142).

6. A low-carbon solid waste concrete production process according to claim 5, characterized in that: The rotating inner ring (141) comprises an upper rotating ring and a lower rotating ring which are joined together. Both ends of the lower rotating ring are provided with inserts (144). Both ends of the lower rotating ring are provided with insert grooves (145) which match the insert blocks (144). The lower rotating ring is provided with locking screws which pass through the insert grooves (145) and are threadedly connected to the insert blocks (144).

7. The low-carbon solid waste concrete production process according to claim 5, characterized in that: The outer circumferential surface of the rotating inner ring (141) is provided with mounting openings (146) at intervals along its circumferential direction, and the roller is located in the mounting openings (146). The outer circumferential surface of the rotating inner ring (141) is covered and fixed with a wear-resistant metal sheet (147), and the wear-resistant metal sheet (147) is provided with a mounting bayonet (148) for limiting the position of the roller.

8. The low-carbon solid waste concrete production process according to claim 5, characterized in that: The inner circumferential surface of the rotating outer ring (142) is provided with limiting convex edges (150) extending in the radial direction on both sides, and the outer circumferential surface of the rotating inner ring (141) is provided with limiting grooves (151) for embedding the limiting convex edges (150) on both sides, and a mounting groove (152) for mounting the outer circumferential surface of the rotating inner ring (141) is formed on the inner circumferential surface of the rotating outer ring (142) through the two limiting convex edges (150); A mounting flange (149) is formed on the outer circumferential surface of the rotating outer ring (142), and the mounting flange (149) is fixed to the grinding grate plate (10) by means of mounting bolts.

9. The low-carbon solid waste concrete production process according to claim 5, characterized in that: A blowing air channel (18) is provided in the rotating outer ring (142), one end of the blowing air channel (18) is communicated with the end surface of the rotating outer ring (142), and the other end of the blowing air channel (18) is communicated with the contact surface between the rotating outer ring (142) and the rotating inner ring (141); At least one blow cylinder (19) is arranged on the rotating outer ring (142), an air inlet and an air outlet are arranged on the inner cavity of the blow cylinder (19), the air outlet is communicated with one end of the blowing flow channel (18), an air inlet check valve (20) is installed on the air inlet, and an air outlet check valve (22) is installed on the air outlet, a piston (23) is arranged in the blow cylinder (19), and a connecting rod (24) is arranged in the middle of the piston (23); A linkage ring (25) is arranged on the end surface of the rotating inner ring (141), and a linkage ring groove (26) is opened on the outer circumferential surface of the linkage ring (25). The linkage ring groove (26) is arranged in a wave shape in the circumferential direction, and the end of the connecting rod (24) cooperates with the linkage ring groove (26).

10. The low-carbon solid waste concrete production process according to claim 9, characterized in that: The linkage ring groove (26) is arranged in an I-shape, the connecting rod (24) extends into the linkage ring groove (26), and a linkage roller (27) cooperating with the linkage ring groove (26) is rotatably mounted on the end of the connecting rod (24).

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