Coal gangue sand production line complete equipment
The design of the coal gangue crushing and screening system and processing production line has solved the problems of high coal gangue powder content and fly ash pollution, realizing the efficient utilization of coal gangue and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HAIZOU HEAVY MACHINERY CO LTD
- Filing Date
- 2025-04-07
- Publication Date
- 2026-06-02
AI Technical Summary
In existing coal gangue sand making processes, the high content of coal gangue powder affects the quality of concrete, and the fly ash pollutes the environment. The problems of screening and utilization have not been effectively solved.
Design a coal gangue crushing and screening system to crush and screen coal gangue into three categories: powder, fine, and coarse materials. These materials are then processed and utilized through powder processing production lines, fine material processing production lines, and coarse material processing production lines. A classifier and a gyratory screen are used to collect fly ash and reduce the powder content.
It achieves effective screening and utilization of coal gangue powder, meets the needs of concrete preparation, reduces fly ash pollution, and realizes full utilization and zero pollution discharge of coal gangue waste.
Smart Images
Figure CN224308565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment manufacturing, and in particular to a complete set of equipment for a coal gangue sand making production line. Background Technology
[0002] Coal gangue is a solid waste generated during coal mining and washing. It is a dark gray rock with a low carbon content and harder than coal, which is associated with coal seams during coal formation. In recent years, there has been an increasing number of technologies for utilizing coal gangue. After being transported from the coal plant to the processing plant, coal gangue is crushed using traditional crushers, usually to a size of less than 30 mm, and can then be used directly as a concrete mixing material.
[0003] Existing processes for preparing ordinary mortar and concrete require a dust content of around 10% in coal gangue sand. A higher dust content negatively impacts the water absorption rate of the coal gangue sand. However, existing coal gangue sand-making processes generate a large amount of coal gangue powder during the primary crushing and fine crushing / shaping stages, approximately 30%-40% of which is 0-5mm coal gangue powder. To avoid affecting the preparation of ordinary mortar and concrete, the coal gangue powder needs to be screened out. However, due to the large quantity of coal gangue powder, after screening, it can only be piled up on-site as waste. As the amount of coal gangue sand produced increases, the amount of coal gangue powder also increases, making on-site storage a major challenge. Furthermore, coal gangue powder contains a large amount of fly ash, with particles smaller than 0.5mm, which can easily scatter in the wind, severely impacting the on-site environment. Therefore, the screening, extraction, and reuse of fly ash and coal gangue powder is a major challenge in this field.
[0004] Furthermore, in the existing coal gangue concrete preparation process, the coal gangue particles are not screened into coarse and fine materials, making it impossible to scientifically proportion the fine materials and aggregates as in conventional concrete. Utility Model Content
[0005] The purpose of this utility model is to provide a complete set of equipment for a coal gangue sand making production line that fully utilizes coal gangue and maximizes its economic value.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a complete set of equipment for a coal gangue sand making production line, including a coal gangue crushing and fine screening system, a powder conveyor belt, a fine material conveyor belt, a coarse material conveyor belt, a powder processing production line, a fine material processing production line, and a coarse material processing production line. The coal gangue crushing and fine screening system is connected to the powder processing production line, the fine material processing production line, and the coarse material processing production line respectively through the powder conveyor belt, the fine material conveyor belt, and the coarse material conveyor belt. The fine material processing production line consists of a mineral processing equipment A, a drying equipment A, a buffer sand silo A, a sand making machine A, a powder classifier A, and a gyratory screen A connected in sequence. The discharge end of the fine material conveyor belt is connected to the inlet of the mineral processing equipment A. The coarse material processing production line consists of a mineral processing equipment B, a drying equipment B, a buffer sand silo B, a sand making machine B, a powder classifier B, and a gyratory screen B connected in sequence. The discharge end of the coarse material conveyor belt is connected to the inlet of the mineral processing equipment B.
[0007] Preferably, the coal gangue crushing and screening system comprises a hopper, a plate feeder, a primary crusher, a multi-stage vibrating screen, and a main conveyor belt. The plate feeder is located below the discharge port of the hopper. The receiving end of the main conveyor belt is located below the discharge ports of the plate feeder and the primary crusher. The discharge end of the main conveyor belt is located above the multi-stage vibrating screen. The multi-stage vibrating screen is equipped with screens with 5mm, 15mm, and 30mm mesh openings. The multi-stage vibrating screen is equipped with powder discharge ports, fine material discharge ports, coarse material discharge ports, and return particle discharge ports corresponding to the screening grades. The feed end of the powder conveyor belt is located below the powder discharge port, the feed end of the fine material conveyor belt is located below the fine material discharge port, and the feed end of the coarse material conveyor belt is located below the coarse material discharge port.
[0008] Preferably, the system also includes a secondary crusher and a return conveyor belt. The receiving end of the return conveyor belt is located below the return particle discharge port of the screening equipment, and the other end is located above the secondary crusher. The bottom discharge port of the secondary crusher is located above the main conveyor belt.
[0009] Preferably, the coal gangue discharge port of the mineral processing equipment A is connected to the feed end of the drying equipment A, the discharge end of the drying equipment A is connected to the interior of the buffer sand silo A through a feeder, the discharge port of the buffer sand silo A is connected to the feed port of the sand making machine A through a hoist, the discharge port of the sand making machine A is connected to the feed port of the air classifier A, and the bottom discharge port of the air classifier A is connected to the interior of the gyratory screen A through a hoist.
[0010] The coal gangue discharge port of the mineral processing equipment B is connected to the feed end of the drying equipment B. The discharge end of the drying equipment B is connected to the interior of the buffer sand silo B through a feeder. The discharge port of the buffer sand silo B is connected to the feed port of the sand making machine B through a hoist. The discharge port of the sand making machine B is connected to the feed port of the air classifier B. The bottom discharge port of the air classifier B is connected to the interior of the gyratory screen B through a hoist.
[0011] Preferably, the system also includes a fine sand bin, a coarse sand bin, a coal gangue powder sand bin, and a fly ash sand bin. The top of the air classifier is connected to the inside of the fly ash sand bin via a pneumatic conveying pipe. The coal gangue powder sand bin is used to store the coal gangue powder screened by the gyratory screen A and the gyratory screen B. The fine sand bin is used to store the fine coal gangue selected by the gyratory screen A. The coarse sand bin is used to store the coarse coal gangue screened by the gyratory screen B.
[0012] Preferably, both mineral processing equipment A and mineral processing equipment B are X-ray mineral processing equipment; both mineral processing equipment A and mineral processing equipment B are air separators.
[0013] Preferably, the powder processing production line includes a drying device C, and the discharge end of the powder conveyor belt is connected to the interior of the drying device.
[0014] Preferably, the equipment also includes coal gangue-based consolidation material production equipment, which consists of a coal gangue powder silo a, a fly ash silo a, a gypsum powder silo a, a consolidation masterbatch silo a, a metering hopper a, a mixer a, and a discharge pipe a. The bottoms of the coal gangue powder silo a, the fly ash silo a, the gypsum powder silo a, and the consolidation masterbatch silo a are respectively connected to the interior of the metering hopper a through a screw feeder a. The bottom discharge port of the metering hopper a is connected to the top of the mixer a. The discharge pipe a is located at the bottom of the mixer, and a metering valve is provided at the top of the discharge pipe a.
[0015] Preferably, the equipment also includes concrete mortar batching equipment and a concrete mixing plant. The concrete mortar batching equipment includes a coal gangue fine material bin b, a coal gangue coarse material bin b, a cement bin b, a fly ash bin b, a metering hopper b, a mixer b, and a discharge pipe b. The bottoms of the coal gangue fine material bin b, the coal gangue coarse material bin b, the cement bin b, and the fly ash bin b are respectively connected to the interior of the metering hopper b through a screw feeder b. The bottom discharge port of the metering hopper b is connected to the top of the mixer b. The discharge pipe b is located at the bottom of the mixer b and is connected to the mixing unit in the concrete mixing plant.
[0016] As a preferred option, a soil stabilization mixing plant is also included.
[0017] Compared with the prior art, the advantages of this utility model are as follows: This utility model designs a complete set of equipment for a coal gangue sand making production line. Through the design of the coal gangue crushing and screening system, coal gangue can be crushed and screened into three types of coal gangue products: powder, fine material, and coarse material. The powder processing production line can process and utilize the powder generated in the crushing stage. The fine material processing production line and the coarse material processing production line can produce the fine coal gangue and coarse coal gangue required for coal gangue concrete. At the same time, an air classifier and a gyratory screen are designed to collect the fly ash and coal gangue powder generated by the sand making machine, thereby reducing the powder content in the fine coal gangue and coarse coal gangue to meet the needs of concrete preparation. Equipment for producing coal gangue-based consolidation materials, equipment for batching concrete mortar, concrete mixing plants, and stabilized soil mixing plants were designed to produce corresponding products on-site from coal gangue fly ash, coal gangue powder, fine coal gangue, and coarse coal gangue, thus achieving full utilization of coal gangue waste and zero pollution emissions. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the coal gangue crushing and fine screening system of this utility model;
[0020] Figure 3 This is a schematic diagram of the sand making and processing production line of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the coal gangue-based consolidation material production equipment of this utility model;
[0022] Figure 5 This is a structural schematic diagram of the concrete mortar batching equipment of this utility model.
[0023] In the diagram: 1. Coal gangue crushing and screening system; 11. Hopper; 12. Plate feeder; 13. Primary crusher; 14. Multi-stage vibrating screen; 15. Main conveyor belt; 16. Return conveyor belt; 17. Secondary crusher;
[0024] 2. Powder conveyor belt; 21. Powder processing production line; 3. Fine material conveyor belt; 4. Coarse material conveyor belt;
[0025] 5. Fine material processing production line; 51. Mineral processing equipment A; 52. Drying equipment A; 53. Buffer sand silo A; 54. Sand making machine A; 55. Air classifier A; 56. Vibrating screen A;
[0026] 6. Coarse material processing production line; 61. Mineral processing equipment B; 62. Drying equipment B; 63. Buffer sand silo B; 64. Sand making machine B; 65. Air classifier B; 66. Vibrating screen B;
[0027] 7. Coal gangue-based consolidation material production equipment; 71. Fly ash silo a; 72. Coal gangue powder silo a; 73. Consolidation masterbatch silo a; 74. Gypsum powder silo a; 75. Screw feeder a; 76. Measuring hopper a; 77. Mixer; 78. Discharge pipe a;
[0028] 8. Concrete mortar batching equipment; 81. Fly ash silo b; 82. Coal gangue fine material silo b; 83. Coal gangue coarse material silo b; 84. Cement silo b; 85. Screw feeder b; 86. Measuring hopper b; 87. Mixer b; 88. Discharge pipe b; 9. Concrete mixing plant;
[0029] 10. Stabilized soil mixing plant; 01. Fly ash sand silo; 02. Coal gangue sand silo; 03. Fine sand silo; 04. Coarse sand silo. Detailed Implementation
[0030] The present invention will be further described below: A complete set of equipment for a coal gangue sand making production line, see [link to relevant documentation]. Figure 1 The system includes a coal gangue crushing and screening system 1, a powder conveyor belt 2, a fine material conveyor belt 3, a coarse material conveyor belt 4, a powder processing production line 21, a fine material processing production line 5, and a coarse material processing production line 6. The coal gangue crushing and screening system 1 is connected to the powder processing production line 21, the fine material processing production line 5, and the coarse material processing production line 6 via the powder conveyor belt 2, the fine material conveyor belt 3, and the coarse material conveyor belt 4, respectively. The coal gangue is crushed and screened into three products: coal gangue powder, coal gangue fine material, and coal gangue coarse material by the coal gangue crushing and screening system 1. The three products are transported to the corresponding production lines by the corresponding conveyor belts.
[0031] Among them, the powder processing production line 21 is used to dry and package the 0-5 mm coal gangue powder produced by primary crushing for sale.
[0032] The fine material processing production line 5 consists of a mineral processing equipment A51, a drying equipment A52, a buffer sand silo A53, a sand making machine A54, a powder classifier A55, and a gyratory screen A56 connected in sequence. The discharge end of the fine material conveyor belt 3 is connected to the feed inlet of the mineral processing equipment A51. The fine material processing production line 5 is used to prepare 5-15 mm coal gangue fine materials, and at the same time produces 0-0.5 mm fly ash and 0.5-5 mm coal gangue powder by-products.
[0033] The coarse material processing production line 6 consists of a mineral processing equipment B61, a drying equipment B62, a buffer sand silo B63, a sand making machine B64, a powder classifier B65, and a gyratory screen B66 connected in sequence. The discharge end of the coarse material conveyor belt 4 is connected to the feed inlet of the mineral processing equipment B61. The coarse material processing production line 6 is used to prepare 15-30mm coal gangue coarse material, and at the same time produces 0-0.5mm fly ash and 0.5-5mm coal gangue powder by-products.
[0034] The coal gangue crushing and screening system 1 consists of a hopper 11, a plate feeder 12, a primary crusher 13, a multi-stage vibrating screen 14, and a main conveyor belt 15. (See also...) Figure 2 The plate feeder 12 is located below the discharge port of the hopper 11. The receiving end of the main conveyor belt 15 is located below the discharge ports of the plate feeder 12 and the primary crusher 13. The discharge end of the main conveyor belt 15 is located above the multi-stage vibrating screen 14. The multi-stage vibrating screen 14 is equipped with screens with 5mm, 15mm, and 30mm screen holes. The multi-stage vibrating screen 14 is equipped with powder discharge ports, fine material discharge ports, coarse material discharge ports, and return particle discharge ports corresponding to the screening grades. The feed end of the powder conveyor belt 2 is located below the powder discharge port. The feed end of the fine material conveyor belt 3 is located below the fine material discharge port. The feed end of the coarse material conveyor belt 4 is located below the coarse material discharge port. The hopper 11 is used as a receiving platform. Vehicles pour coal gangue waste into the hopper 11, and the plate feeder 12 at the bottom of the hopper 11 sends it to the primary crusher 13 for primary crushing. The coal gangue waste is crushed to less than 30mm and then conveyed by the main conveyor belt 15 to the screening equipment for multi-stage screening, which separates the coal gangue particles into three products: powder, fine material, and coarse material.
[0035] Because a small amount of coal gangue may not be crushed to below 30mm during the primary crushing process of the primary crusher 13, which does not meet the requirements of the sand making process, a secondary crusher 17 and a return conveyor belt 16 are also provided in the coal gangue crushing and fine screening system 1. The receiving end of the return conveyor belt 16 is located below the return particle discharge port of the screening equipment, and the other end is located above the secondary crusher 17. The bottom discharge port of the secondary crusher 17 is located above the main conveyor belt 15. The screening equipment screens out the 30mm coal gangue return particles, which are then crushed again by the return conveyor belt 16 and the secondary crusher 17, and then sent to the screening equipment for further screening by the main conveyor belt 15.
[0036] Sand making production equipment, see Figure 3The coal gangue discharge port of the mineral processing equipment A51 is connected to the feed end of the drying equipment A52. The discharge end of the drying equipment A52 is connected to the interior of the buffer sand silo A53 via a feeder. The discharge port of the buffer sand silo A53 is connected to the feed port of the sand making machine A54 via an elevator. The discharge port of the sand making machine A54 is connected to the feed port of the air classifier A55. The bottom discharge port of the air classifier A55 is connected to the interior of the gyratory screen A56 via an elevator. The coal gangue discharge port of the mineral processing equipment B61 is connected to the feed end of the drying equipment B62. The discharge end of the drying equipment B62 is connected to the interior of the buffer sand silo B63 via a feeder. The discharge port of the buffer sand silo B63 is connected to the feed port of the sand making machine B64 via an elevator. The discharge port of the sand making machine B64 is connected to the feed port of the air classifier B65. The bottom discharge port of the air classifier B65 is connected to the interior of the gyratory screen B66 via an elevator. The fine material processing production line 5 is used to produce 5-15mm fine coal gangue sand, and the coarse material processing production line 6 is used to produce 15-30mm coarse coal gangue sand. The preparation equipment is the same, only the sand making particle size of the sand making machine is different. The process involves first screening out the iron sulfide impurities in the coal gangue using mineral processing equipment for separate sale. After drying, the gangue is buffered in a sand silo and then finely crushed and shaped into sand using a sand making machine. During this sand making process, some 0-5mm coal gangue powder and fly ash are generated. Therefore, a powder separator is designed to separate the 0-0.5mm fly ash by air separation and the 0.5-5mm coal gangue powder by a vibrating screen. The coal gangue-based consolidation material production equipment 7, concrete mortar batching equipment 8, and stabilized soil mixing plant 10 are used as raw materials.
[0037] It also includes a fine sand silo 03, a coarse sand silo 04, a coal gangue powder sand silo 02, and a fly ash sand silo 01. The top of the air classifier is connected to the inside of the fly ash sand silo 01 through a pneumatic conveying pipe. The coal gangue powder sand silo 02 is used to store the coal gangue powder screened by the gyratory screen A56 and the gyratory screen B66. The fine sand silo 03 is used to store the fine coal gangue selected by the gyratory screen A56. The coarse sand silo 11 is used to store the coarse coal gangue screened by the gyratory screen B66. The sand silos are used to store the fine materials, coarse materials, powder materials, and fly ash generated in the sand making process. When needed, they are transported to the coal gangue-based consolidation material production equipment 7, the concrete mortar batching equipment 8, and the stabilized soil mixing plant 10 as raw materials.
[0038] Both the mineral processing equipment A51 and B61 employ X-ray mineral processing to separate iron sulfide impurities from coal gangue for separate sale, generating additional economic value while removing impurities. Both the air classifiers A55 and B65 employ air classifiers, which can separate fly ash smaller than 0.5mm generated during the sand making process and store it in the fly ash sand silo 01. This fly ash can then be used as raw material in the coal gangue-based solidification material production equipment 7 to produce coal gangue-based solidification powder, thus realizing the economic utilization of coal gangue fly ash.
[0039] The powder processing production line 21 includes a drying device C. The discharge end of the powder conveyor belt 2 is connected to the interior of the drying device. The screened powder is 0-5mm coal gangue powder produced by crushing by a crusher. It is screened out from the coal gangue particles crushed in the primary crushing stage by a multi-stage vibrating screen 14. This reduces the output of coal gangue powder and fly ash in the sand making stage, thus reducing the pressure on subsequent production. At the same time, it avoids the subsequent drying and buffering process, which would cause coal gangue powder and fly ash to scatter and affect the environment. Moreover, the screened powder can be dried by the drying device of the powder processing production line 21 and can be used as a raw material for low-calorific-value coal. After being bagged by packaging equipment, it can be sold directly, generating economic value.
[0040] Also includes coal gangue-based consolidation material production equipment 7, see [link / reference] Figure 4 The coal gangue-based solidification material production equipment 7 comprises a coal gangue powder silo a72, a fly ash silo a71, a gypsum powder silo a74, a solidification masterbatch silo a73, a metering hopper a76, a mixer a77, and a discharge pipe a78. The bottoms of the coal gangue powder silo a72, fly ash silo a71, gypsum powder silo a74, and solidification masterbatch silo a73 are respectively connected to the interior of the metering hopper a76 via a screw feeder a75. The bottom discharge port of the metering hopper a76 is connected to the top of the mixer a77. The discharge pipe a78 is located at the bottom of the mixer, and the upper part of the discharge pipe a78 is equipped with… The metering valve adds 0.5-5mm coal gangue powder to the coal gangue powder silo a72 and less than 0.5mm fly ash to the fly ash silo a71. The coal gangue-based consolidation material production equipment 7 can process and utilize the less than 0.5mm coal gangue fly ash and 0.5-5mm coal gangue powder produced by the sand making machine's fine crushing and shaping. After adding gypsum powder and consolidation masterbatch for mixing, coal gangue-based consolidation material powder can be produced. A bulk discharge port can be designed at the lower end of the discharge pipe a78 to facilitate loading onto tanker vehicles. The discharge pipe a78 can also be connected to packaging equipment for bagged sales.
[0041] It also includes concrete mortar batching equipment 8 and concrete mixing plant 9. The concrete mortar batching equipment 8 includes a coal gangue fine material silo b82, a coal gangue coarse material silo b83, a cement silo b84, a fly ash silo b81, a metering hopper b, a mixer b87, and a discharge pipe b88. See [link to relevant documentation]. Figure 5 The bottoms of the coal gangue fine material bin b82, coal gangue coarse material bin b83, cement bin b84 and fly ash bin b81 are respectively connected to the inside of the metering hopper b through the screw feeder b85. The bottom discharge port of the metering hopper b is connected to the top of the mixer b87. The discharge pipe b88 is set at the bottom of the mixer b87 and is connected to the mixing unit in the concrete mixing plant 9. The concrete mortar batching equipment 8 is structurally similar to the coal gangue-based consolidation material production equipment 7. 5-15mm fine coal gangue is added to the fine coal gangue bin b82 for use as concrete fine material. 15-30mm coarse coal gangue is added to the coarse coal gangue bin b83 for use as concrete aggregate. Coal gangue fly ash less than 0.5mm is added to the fly ash bin b81 as an auxiliary additive. After being proportioned with cement, the mixture is sent to the concrete mixing plant 9 to produce concrete using coal gangue as raw material, turning coal gangue from waste into treasure and realizing the comprehensive utilization of coal gangue.
[0042] It also includes a stabilized soil mixing plant 10. Stabilized soil is made by mixing binders (such as cement, lime, fly ash, etc.) with soil, gravel or other aggregates. The main purpose of constructing the stabilized soil mixing plant 10 is to utilize coal gangue and fly ash smaller than 0.5mm.
[0043] The above provides a detailed description of a complete set of equipment for a coal gangue sand making production line provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, based on the idea of this utility model, there will be changes in the specific implementation and application scope. Changes and improvements to this utility model are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A complete set of equipment for a coal gangue sand making production line, characterized in that: The system includes a coal gangue crushing and screening system, a powder conveyor belt, a fine material conveyor belt, a coarse material conveyor belt, a powder processing production line, a fine material processing production line, and a coarse material processing production line. The coal gangue crushing and screening system is connected to the powder processing production line, the fine material processing production line, and the coarse material processing production line via the powder conveyor belt, the fine material conveyor belt, and the coarse material conveyor belt, respectively. The fine material processing production line consists of a mineral processing equipment A, a drying equipment A, a buffer sand silo A, a sand making machine A, a classifier A, and a gyratory screen A, connected in sequence. The discharge end of the fine material conveyor belt is connected to the inlet of the mineral processing equipment A. The coarse material processing production line consists of a mineral processing equipment B, a drying equipment B, a buffer sand silo B, a sand making machine B, a classifier B, and a gyratory screen B, connected in sequence. The discharge end of the coarse material conveyor belt is connected to the inlet of the mineral processing equipment B.
2. The complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: The coal gangue crushing and screening system consists of a hopper, a plate feeder, a primary crusher, a multi-stage vibrating screen, and a main conveyor belt. The plate feeder is located below the discharge port of the hopper. The receiving end of the main conveyor belt is located below the discharge ports of the plate feeder and the primary crusher. The discharge end of the main conveyor belt is located above the multi-stage vibrating screen. The multi-stage vibrating screen is equipped with screens with 5mm, 15mm, and 30mm mesh openings. The multi-stage vibrating screen is equipped with powder discharge ports, fine material discharge ports, coarse material discharge ports, and return particle discharge ports corresponding to the screening grades. The feed end of the powder conveyor belt is located below the powder discharge port, the feed end of the fine material conveyor belt is located below the fine material discharge port, and the feed end of the coarse material conveyor belt is located below the coarse material discharge port.
3. The complete set of equipment for a coal gangue sand making production line according to claim 2, characterized in that: It also includes a secondary crusher and a return conveyor belt. The receiving end of the return conveyor belt is located below the return particle discharge port of the screening equipment, and the other end is located above the secondary crusher. The bottom discharge port of the secondary crusher is located above the main conveyor belt.
4. The complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: The coal gangue discharge port of the mineral processing equipment A is connected to the feed end of the drying equipment A. The discharge end of the drying equipment A is connected to the interior of the buffer sand silo A through a feeder. The discharge port of the buffer sand silo A is connected to the feed port of the sand making machine A through a hoist. The discharge port of the sand making machine A is connected to the feed port of the air classifier A. The bottom discharge port of the air classifier A is connected to the interior of the gyratory screen A through a hoist. The coal gangue discharge port of the mineral processing equipment B is connected to the feed end of the drying equipment B. The discharge end of the drying equipment B is connected to the interior of the buffer sand silo B through a feeder. The discharge port of the buffer sand silo B is connected to the feed port of the sand making machine B through a hoist. The discharge port of the sand making machine B is connected to the feed port of the air classifier B. The bottom discharge port of the air classifier B is connected to the interior of the gyratory screen B through a hoist.
5. A complete set of equipment for a coal gangue sand making production line according to claim 4, characterized in that: It also includes a fine sand bin, a coarse sand bin, a coal gangue powder sand bin, and a fly ash sand bin. The top of the air classifier is connected to the inside of the fly ash sand bin via a pneumatic conveying pipe. The coal gangue powder sand bin is used to store the coal gangue powder screened by the gyratory screen A and the gyratory screen B. The fine sand bin is used to store the fine coal gangue selected by the gyratory screen A. The coarse sand bin is used to store the coarse coal gangue screened by the gyratory screen B.
6. The complete set of equipment for a coal gangue sand making production line according to claim 4, characterized in that: Both mineral processing equipment A and mineral processing equipment B are X-ray mineral processing equipment; both air classifiers A and air classifier B are air classifiers.
7. The complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: The powder processing production line includes a drying device C, and the discharge end of the powder conveyor belt is connected to the interior of the drying device.
8. The complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: It also includes coal gangue-based consolidation material production equipment, which consists of a coal gangue powder silo (a), a fly ash silo (a), a gypsum powder silo (a), a consolidation masterbatch silo (a), a metering hopper (a), a mixer (a), and a discharge pipe (a). The bottoms of the coal gangue powder silo (a), fly ash silo (a), gypsum powder silo (a), and consolidation masterbatch silo (a) are respectively connected to the interior of the metering hopper (a) via a screw feeder (a). The bottom discharge port of the metering hopper (a) is connected to the top of the mixer (a). The discharge pipe (a) is located at the bottom of the mixer, and a metering valve is provided at the top of the discharge pipe (a).
9. A complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: It also includes concrete mortar batching equipment and a concrete mixing plant. The concrete mortar batching equipment includes a coal gangue fine material bin b, a coal gangue coarse material bin b, a cement bin b, a fly ash bin b, a metering hopper b, a mixer b, and a discharge pipe b. The bottoms of the coal gangue fine material bin b, the coal gangue coarse material bin b, the cement bin b, and the fly ash bin b are respectively connected to the inside of the metering hopper b through a screw feeder b. The bottom discharge port of the metering hopper b is connected to the top of the mixer b. The discharge pipe b is located at the bottom of the mixer b and is connected to the mixing unit in the concrete mixing plant.
10. A complete set of equipment for a coal gangue sand making production line according to claim 1, characterized in that: It also includes soil stabilization mixing plants.