Process system for large-yield sand making building
By introducing a process flow combining air selection pre-screening and mechanical screening into the sand making building process system, the problem of low traditional power screening efficiency is solved, the production of large-yield machine sand is achieved, and the screening efficiency and particles are improved. Grading accuracy reduces land and cost.
Patent Information
- Application Number
- CN202420205877.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-29
AI Technical Summary
In the primary sorting stage of coarse, medium and fine sand and stone powder, the power screening efficiency is low, which makes it difficult for sand making buildings to achieve large-scale production, and medium and fine sand are difficult to effectively screen, which restricts the output. .
The all-steel sand making building process system is adopted, combined with air selection and pre-screening and mechanical screening, and two-stage sorting is performed through a powerless powder sorter and a powered powder sorter, and the three-axis elliptical screen and a vertical shaft impact crusher are used for classification. and crushing, increase raw materials and aggregate buffer bins, optimize process flow, and reduce the burden and footprint of screening equipment.
It improves screening efficiency and particle grading accuracy, reduces the circulating and crushing of medium and fine materials, enhances the yield capacity of the sand making building, is suitable for large-yield machine sand production, and saves space and costs.
Smart Images
Figure CN222197243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of machine-made sand process systems, in particular to a sand-making building process system for large output. Background Art
[0002] The main purpose of the sand making building is to produce high-quality machine-made sand, and it has a small footprint, compact structure, strong powder removal ability, and high environmental protection standards. With the development of the industry and market demand, it is necessary to develop a sand making building with a larger output. The main factors restricting the output are screening and powder removal. The main content of machine-made sand is medium sand and fine sand. Therefore, it is very inefficient to rely solely on mechanical screening and it is difficult to screen out. Therefore, it is necessary to consider selecting some medium sand and fine sand by other means before mechanical screening, and at the same time select the stone powder in the crushing process.
[0003] Therefore, a new process is considered to select the medium sand and fine sand in advance after crushing, reduce the burden of the subsequent screening equipment, and improve the screening rate. Utility Model Content
[0004] The utility model provides a sand making building process system for large output, aiming to solve the problem that in the traditional machine-made sand process line, in the primary sorting stage of serious coarse, medium and fine sand and stone powder mixing, the coarse sand cannot be effectively selected by using a power screen for power screening, thus restricting the sand making building from being used for large output production.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a sand making building process system for large production, comprising:
[0006] The building is in the form of an all-steel structure, and the building comprises a main building and an auxiliary building. The powder selection system is arranged on the top floor of the main building, and a screening system, an aggregate buffer silo, a wet mixer and a raw material buffer silo and a crushing system are arranged on each floor below. The auxiliary building is equipped with a dust removal system and a powder silo. The powder selection system comprises an unpowered powder selector and a powered powder selector. The stone powder dispersion area of the unpowered powder selector is connected to the feed port of the powered powder selector. The coarse sand pre-sorted by the unpowered powder selector enters the screening system for screening and grading, and the medium and fine sand enters the aggregate buffer silo. The coarse-grained stones on the screening system are returned to the crushing system through the raw material buffer silo for closed circulation, and the medium and fine sand under the sieve enter the aggregate buffer silo and then enter the wet mixer for grading. A bucket elevator is also included, and the discharge of the crushing system feeds the unpowered powder selector from bottom to top.
[0007] Preferably, the power powder classifier is a centrifugal powder classifier, and the discharge of the centrifugal powder classifier includes at least a coarse powder return pipe and a fine powder return pipe, the coarse powder return pipe is connected to the wet mixer, and the fine powder return pipe is connected to the powder storage bin.
[0008] Preferably, the unpowered powder classifier includes an aggregate inlet connected to a feeding system, a coarse sand sorting area, a medium and fine sand sorting area and a stone powder dispersion area. A regional regulating flap valve is arranged between the coarse sand sorting area and the medium and fine sand sorting area. The coarse sand sorting area is connected to a coarse sand discharge port, and the medium and fine sand sorting area is connected to a medium and fine sand discharge port.
[0009] Preferably, the crushing system comprises two vertical shaft impact crushers arranged in parallel, and the raw material buffer silo is arranged on the upper part of the vertical shaft impact crushers.
[0010] Preferably, a sand washing machine is arranged at the lower part of the aggregate buffer silo, and the sand output from the sand washing machine is connected to the wet mixer.
[0011] Preferably, the mud and water outlet of the sand washing machine is connected to a sedimentation tank, and the slurry pump outlet of the sedimentation tank is connected to the wet mixer.
[0012] Preferably, the screening system comprises at least one three-axis elliptical screen.
[0013] Compared with the related art, the sand making building process system provided by the utility model has the following beneficial effects:
[0014] The building-type sand making process system of the present invention, through the reasonable layout of the building-type mechanism and the natural height difference advantage of the building-type sand making layout, adopts wind selection pre-screening, reduces screening equipment, saves building space, and pre-separates the crushed large-particle aggregate and part of the medium sand, and then enters the mechanical screening device for fine screening and crushing return circulation. The feed gradation of the screening equipment is narrow, which reduces the screening load, improves the screening efficiency, makes the crushing and return material more accurate, reduces the proportion of circulating crushing of medium and fine materials, increases the proportion of particle size in the middle section of machine-made sand, and optimizes the particle gradation. At the same time, the present application increases the raw material buffer bin and the aggregate buffer bin, optimizes the process, and makes the process suitable for large-scale machine-made sand production. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of a sand-making building for large production in this embodiment;
[0016] Figure 2 Schematic diagram of the process flow of this embodiment.
[0017] Numbers in the figure:
[0018] 1. Main building, 2. Auxiliary building, 3. Powder selection system, 301. Non-powered powder selection machine, 302. Powered powder selection machine, 3011. Aggregate inlet, 3012. Flap valve, 3013. Coarse sand outlet, 3014. Medium and fine sand outlets, 3021 Coarse powder return pipe, 3022. Fine powder return pipe, 4. Screening system, 5. Aggregate buffer silo, 6. Wet mixer, 7. Sand washing system, 8. Crushing system, 9. Raw material buffer silo, 10. Powder storage silo, 11. Bucket elevator, 12. Sand washing machine, 13. Sedimentation box. DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.
[0020] like Figure 1 and 2 As shown, a sand making building process system for large production includes: a building in the form of a full steel structure, the building includes a main building 1 and an auxiliary building 2, the main building 1 is provided with a powder selection system 3 on the top layer, and each layer below is provided with a screening system 4, an aggregate buffer silo 5, a sand washing system 7 and a wet mixer 6, and a raw material buffer silo 9 and a crushing system 8 on the ground layer, the screening system 4 includes two three-axis elliptical screens. The crushing system 8 includes two vertical shaft impact crushers arranged in parallel, and the raw material buffer silo 9 is arranged on the upper part of the vertical shaft impact crusher. The auxiliary building 2 is equipped with a dust removal system and a powder silo. This embodiment reasonably arranges the layout of each sand making system, and fully utilizes the height difference potential energy advantage of the building-type sand making system to pre-classify and remove stone powder in two stages for the machine-made sand aggregate, so that the process is more optimized, the input of kinetic energy of the sorting equipment is reduced, the floor space of the sand making system is reduced, and kinetic energy and cost investment are greatly saved; and it follows that light-weight and small-load equipment is placed on the upper floor, and heavy-weight and large-load equipment is placed on the lower floor, which reduces the requirements for the load of the building's steel structure, greatly saves the weight of the building's steel structure, and further improves safety performance and saves costs.
[0021] The powder selection system 3 includes two parts: an unpowered powder selector 301 and a powered powder selector 302. The unpowered powder selector 301 includes an aggregate inlet 3011 connected to a feeding system, a coarse sand selection area, a medium and fine sand selection area, and a stone powder dispersion area. A regional regulating flap valve 3012 is arranged between the coarse sand selection area and the medium and fine sand selection area. The coarse sand selection area is connected to a coarse sand discharge port 3013, and the medium and fine sand selection area is connected to a medium and fine sand discharge port 3014; the stone powder dispersion area is connected to the inlet of the powered powder selector 302; the powered powder selector 302 is a centrifugal powder selector, and the discharge of the centrifugal powder selector at least includes a coarse powder return pipe 3021 and a fine powder return pipe 3022. The coarse powder return pipe 3021 is connected to the wet mixer 6, and the fine powder return pipe 3022 is connected to the powder storage bin 10. The coarse sand pre-sorted by the unpowered powder classifier 301 enters the screening system 4 for screening and grading, and the medium and fine sand enter the aggregate buffer bin 5. The coarse-grained stones on the screening system 4 are returned to the crushing system 8 through the raw material buffer bin 7 for closed circulation, and the medium and fine sand under the screening enter the aggregate buffer bin 7 and then enter the wet mixer 6 for grading; a bucket elevator 11 is also included, which feeds the unpowered powder classifier 301 from the discharge of the crushing system 8 from bottom to top. A sand washer 12 is arranged at the lower part of the aggregate buffer bin 7, and the sand output of the sand washer 12 is connected to the wet mixer 6. The muddy water outlet of the sand washer 12 is connected to the sedimentation tank 13, and the slurry pump outlet of the sedimentation tank 13 is connected to the wet mixer 6.
[0022] The specific process flow of this embodiment is as follows: Figure 2 As shown, a bucket elevator 11 is arranged on one side of the main building 1, and a crusher on the first floor of the ground is arranged as a CV843 vertical shaft impact crusher. The raw materials enter the raw material buffer silo d through the feed conveyor. An electric gate valve is arranged under the raw material buffer silo. Under normal working conditions, the gate valve is normally open, and the materials enter the CV843 vertical shaft impact crusher through the chute equipped with the electric gate valve. The crushed materials enter the bucket elevator 1 through the bucket conveyor. The bucket elevator 1 lifts the materials to the aggregate inlet of the unpowered powder classifier 301.
[0023] The coarse sand discharge port of the unpowered powder selector 301 is connected to the feed end of the three-axis elliptical screen of SH8203 through the discharge chute, and most of the pre-selected stones larger than 2 mm are transported to the screening system 4 for screening and grading. Most of the medium and fine sands of 0.075-2.5 mm are directly connected to the wet mixer 6 through the chute from the medium and fine sand discharge ports for the wet mixer process. The stone powder smaller than 0.075 mm enters the powered powder selector 302 with negative pressure wind, and the powered powder selector 302 further separates the fine sand or coarse powder and fine powder in the stone powder. After precipitation, the fine sand is merged into the 0.075-2 mm chute and enters the wet mixer. After the stones larger than 2 mm are screened, the stones larger than 4.75 mm and some of the coarse sand of 2.5-4.75 mm are returned to the crushing system 8 to form a closed loop. The medium and fine sand of 0-2.5 mm and some of the coarse sand of 2.5-4.75 mm enter the wet mixer 6 through the collecting hopper. It should be noted that in order to meet the requirements of different gradations of input materials, the process will also change. When the raw materials contain a considerable amount of 0-4.75mm machine-made sand, they can also directly enter the powder selection system for pre-selection and powder removal through the conveying equipment, and then enter screening and crushing. In order to meet the requirements of different gradations of finished products, the present embodiment can adjust the air volume by frequency conversion, adjust the air volume and wind direction by adjusting the air inlet, adjust the fine sand or coarse powder gradation by adjusting the rotor speed of the dynamic powder selector, and adjust the air pressure by adjusting the air valve. The above control can flexibly control the gradation and powder content of machine-made sand. When a host device in the system fails, the gate valve under the raw material buffer silo B is closed, and the conveyor A stops feeding. The residual materials in the system are temporarily stored in the buffer silo to prevent some materials from accumulating in the host during the system shutdown process.
[0024] In other specific embodiments, a sand washer 12 is arranged above the wet mixer 6, and the sand output of the sand washer 12 is connected to the wet mixer 6. The muddy water outlet of the sand washer 6 is connected to the sedimentation box 13, and the slurry pump outlet of the sedimentation box 14 is connected to the wet mixer 6. The sand outlet gap of the medium and fine sand outlet under the screen usually contains dust below 0.075 mm, which is difficult to remove by wind dust removal. In this embodiment, the medium and fine sand are washed by the sand washer 12, and the muddy water of the sand washing is precipitated and intercepted by the sedimentation slurry through the sedimentation box 13, and then merged into the wet mixer, so that the dust in the gap can be cleaned, the aggregate ratio can be accurately controlled, and the gradation of the machine-made sand can be improved and optimized. In this embodiment, an aggregate buffer silo is also arranged above the sand washer to connect the aggregate progress of the screening system and the sand washing and wet mixing system, which is convenient for local shutdown and maintenance. The staged controllable division reduces the impact on the sand making progress of the sand making building, which is conducive to the mass production of the sand making building system.
[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A sand making building process system for large production, characterized in that: include: The building is in the form of an all-steel structure, and the building comprises a main building and an auxiliary building. The powder selection system is arranged on the top layer of the main building, and a screening system, an aggregate buffer silo, a wet mixer and a raw material buffer silo and a crushing system are arranged on each layer below. The auxiliary building is equipped with a dust removal system and a powder silo; the powder selection system comprises an unpowered powder selector and a powered powder selector, and the stone powder dispersion area of the unpowered powder selector is connected to the feed port of the powered powder selector; the coarse sand pre-sorted by the unpowered powder selector enters the screening system for screening and grading, and the medium and fine sand enters the aggregate buffer silo. The coarse-grained stones on the screening system are returned to the crushing system through the raw material buffer silo for closed circulation, and the medium and fine sand under the sieve enter the aggregate buffer silo and then enter the wet mixer for grading. A bucket elevator is also included, and the discharge of the crushing system feeds the unpowered powder selector from bottom to top.
2. A sand making building process system for large production according to claim 1, characterized in that: The power powder classifier is a centrifugal powder classifier, and the discharge of the centrifugal powder classifier at least includes a coarse powder return pipe and a fine powder return pipe. The coarse powder return pipe is connected to the wet mixer, and the fine powder return pipe is connected to the powder storage bin.
3. The sand making building process system for large production according to claim 1 is characterized in that: The unpowered powder classifier includes an aggregate inlet connected to a feeding system, a coarse sand classification area, a medium and fine sand classification area, and a stone powder dispersion area. A regional regulating flap valve is arranged between the coarse sand classification area and the medium and fine sand classification area. The coarse sand classification area is connected to a coarse sand discharge port, and the medium and fine sand classification area is connected to a medium and fine sand discharge port.
4. The sand making building process system for large production according to claim 1 is characterized in that: The crushing system comprises two vertical shaft impact crushers arranged in parallel, and the raw material buffer bin is arranged on the upper part of the vertical shaft impact crushers.
5. The sand making building process system for large production according to claim 1 is characterized in that: A sand washer is arranged at the lower part of the aggregate buffer silo, and the sand output from the sand washer is connected to the wet mixer.
6. A sand making building process system for large production according to claim 5, characterized in that: The muddy water outlet of the sand washing machine is connected to the sedimentation box, and the slurry pump outlet of the sedimentation box is connected to the wet mixer.
7. The sand making building process system for large production according to claim 1 is characterized in that: The screening system comprises at least one three-axis elliptical screen.