A device for producing gravel, machine-made sand and mineral powder and a production process thereof

Abstract

This invention discloses a production apparatus and process for crushed stone, manufactured sand, and mineral powder, belonging to the field of stone processing technology. The apparatus includes a pre-grading mechanism, a shaping mechanism, a dust removal mechanism, and a powder selection mechanism. The pre-grading mechanism includes a grading box, inside which is a receiving box. A screening plate is positioned above the receiving box. Vibrators are fixedly installed on both sides of the inside of the receiving box, and adjustable hydraulic cylinders are fixedly installed at both ends of the inner wall of the grading box. The production process of this application, by setting up a pre-grading mechanism before shaping the stone, pre-grades the stone, avoiding the problem that all mixed stone is subjected to the same energy impact in a single shaping machine, which could lead to over-crushing of small particles and under-shaping of large particles, resulting in uneven particle shape and gradation of the product, failing to meet the actual needs of this application for graded production of crushed stone, manufactured sand, and mineral powder.

Description

Technical Field

[0001] This invention relates to the field of stone processing technology, and in particular to a production apparatus and process for crushed stone, manufactured sand and mineral powder. Background Technology

[0002] Crushed stone, manufactured sand, and mineral powder are indispensable raw materials for infrastructure construction such as buildings and transportation. The sophistication of their production processes directly affects product quality, production costs, and environmental impact. Currently, the mainstream production processes in the industry typically include several core steps such as crushing and shaping, screening and grading, dust removal, and stone powder collection.

[0003] Specifically, existing technologies generally employ the following process: the mixed stone is fed into a high-power vertical shaft impact crusher (shaping machine) for centralized crushing and shaping to eliminate needle-like and flaky particles and obtain manufactured sand; the shaped mixed stone is then mechanically screened by a multi-layer vibrating screen to separate 0-3mm manufactured sand, 3-5mm gravel, and various grades of gravel; the dust generated during the screening process is collected by a two-stage dust removal system consisting of a cyclone dust collector and a pulse bag filter, while a classifier is used to control the stone powder content of the finished manufactured sand.

[0004] However, this conventional technical solution has many inherent drawbacks. First, it employs a series-processing, extensive method, indiscriminately feeding all mixed stone materials of different particle sizes into the same high-energy-consuming shaping machine. This results in the ineffective circulation and over-crushing of medium and fine particles (e.g., 3-10mm) that are close to the finished product size within the machine. This not only causes significant energy waste but also generates excessive stone powder, disrupting the natural gradation of the manufactured sand and leading to large fluctuations in product quality. Summary of the Invention

[0005] This invention provides a production device and process for crushed stone, manufactured sand and mineral powder, which can solve the problem that the existing production process ineffectively circulates and over-crushes medium and fine particles of the finished product specifications in the machine, resulting in energy waste and large fluctuations in product quality.

[0006] This invention provides a production apparatus for crushed stone, manufactured sand, and mineral powder, including a pre-grading mechanism, a shaping mechanism, a dust removal mechanism, and a powder selection mechanism. The pre-grading mechanism includes a grading box, inside which a vibrating screening assembly is installed. The vibrating screening assembly includes a receiving box, with a screening plate positioned above the receiving box. Several resonant springs are fixedly installed between the top edge of the receiving box and the screening plate. Vibrators are fixedly installed on both sides of the inside of the receiving box. Clearance openings are provided at both ends of the receiving box. Adjustable hydraulic cylinders are fixedly installed at both ends of the inner wall of the grading box, and the output ends of the adjusting hydraulic cylinders are slidably connected to the bottom ends of the receiving box.

[0007] As a further embodiment of the present invention: a drive guide rail is fixedly installed on the top of the grading box, a drive frame is slidably installed on the inner wall of the drive guide rail, a material-forming hydraulic cylinder is fixedly installed in the middle of the drive frame, a material-forming frame is fixedly connected to the output end of the material-forming hydraulic cylinder, and a material-forming roller is rotatably installed at the bottom of the material-forming frame.

[0008] As a further embodiment of the present invention: both ends of the screening plate are fixedly connected to an extended guide plate, and a baffle plate is fixedly connected to the top of the extended guide plate near the feed end of the pre-grading mechanism.

[0009] As a further aspect of the present invention: the shaping mechanism includes a coarse material shaping machine and a fine material shaping machine. The fine material shaping machine includes a housing. A feed pipe is fixedly connected to the top of the housing, and a discharge chute is fixedly connected to the bottom of the housing. An impact pad is fixedly connected to the middle of the inner wall of the housing. The impact pad is annular. Several sets of impact blocks are fixedly connected to the inner wall of the impact pad. A crushing component is provided in the middle of the inner wall of the housing.

[0010] As a further aspect of the present invention: the impact block includes a horizontally arranged central block, an upper support plate is fixedly connected to the top of the central block, and a lower support plate is fixedly connected to the bottom of the central block, wherein the inclination of the upper support plate is less than that of the lower support plate.

[0011] As a further aspect of the present invention: a material distribution hood is provided above the crushing component, the top of the material distribution hood protrudes upward in a pointed cone shape, a material separator is fixedly connected to the edge of the material distribution hood, a plurality of material discharge ports are provided in the middle of the material separator, a material separator plate is fixedly connected to the inner wall of the plurality of material discharge ports, and the plurality of material separator plates are inclined downward.

[0012] As a further aspect of the present invention: the crushing assembly includes a drive motor, a protective plate is fixedly connected to the top of the drive motor, a drive shaft is fixedly connected to the output end of the drive motor, a connecting frame is fixedly connected to the top of the drive shaft, a crushing drum is fixedly connected to the top of the connecting frame, and a plurality of crushing blades are fixedly installed on the outer wall of the crushing drum.

[0013] As a further embodiment of the present invention: a central rod is fixedly connected to the top of the connecting frame, and a plurality of central material distribution plates are fixedly connected between the outer wall of the central rod and the crushing drum. A through hole is opened in the middle of the plurality of central material distribution plates, and a plurality of material distribution grooves are opened on the top edge of the material distribution cover. The bottom of the plurality of material distribution grooves is corresponding to the inner cavity of the crushing drum.

[0014] As a further embodiment of the present invention: a discharge hood is fixedly connected to the bottom center of the receiving box, the inner wall of the discharge hood is inclined, and a fine material guide pipe is fixedly connected to the bottom of the discharge hood.

[0015] A production process for crushed stone, manufactured sand, and mineral powder includes the following steps: Step 1: Feed the mixed stone into the pre-grading mechanism to grade it into coarse and fine materials; Step 2: Feed the coarse and fine materials into the coarse material shaping machine and the fine material shaping machine respectively for further crushing and shaping; Step 3: Send the shaped stone into the dust removal system for vacuuming; Step 4: After dust collection, the coarse and fine materials are fed into the classifier for powder selection; Step 5: Transfer the selected stone materials into the powder storage tank for storage.

[0016] As a further aspect of the present invention: In step one, the pre-grading mechanism drives the vibrating screening component to reciprocate and tilt by adjusting the hydraulic cylinder, so that the mixture moves back and forth on the screening plate, and the vibrator drives the screening plate to vibrate, thereby achieving screening of the mixture.

[0017] As a further aspect of the present invention: In step two, the fine material shaping machine retains the scattered stone material on the inner wall of the impact pad by setting the impact pad and impact block, so as to protect the impact pad and extend the service life of the impact pad.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The production process of the present invention, by setting a pre-grading mechanism before stone shaping, pre-grades the stone and directly separates stones of different particle sizes, so that finer stones do not need to enter the coarse material shaping machine with high power and high energy consumption. This avoids the problem that the mixed stone is subjected to the same energy impact in a single shaping machine, which may cause small particles to be over-crushed and large particles to be under-shaped, resulting in the product particle shape and gradation being averaged, which cannot meet the actual needs of the graded production of crushed stone, manufactured sand and mineral powder in this application. The pre-grading mechanism of the production device of the present invention receives the stone material through a screening plate. The vibration of the screening plate is driven by a vibrator and transmitted through a resonant spring to screen the mixed stone material. With the help of hydraulic cylinders at both ends, the mixed stone material on the screening plate moves back and forth along the screening plate to achieve full screening of the stone material. This effectively avoids the problem that large stone particles accumulate at the bottom of the stone material during screening in a single posture, which will cause the screening mesh to close, hinder the falling of other stone materials, and affect the screening efficiency. The fine material shaping machine of this invention uses the rotation of the crushing drum to drive the crushing blades to crush the stone. By setting impact pads and impact blocks, the flying stone during the crushing process is blocked and impacted, improving the crushing effect. At the same time, the impact blocks temporarily store the stone, so that a protective pad made of stone is formed inside the impact pad. The protective pad itself absorbs the impact of the stone, thereby reducing the direct impact wear of the impact pad and extending the service life of the impact pad. In conjunction with the material distribution cover and material distribution channel set at the top of the crushing drum, the stone is further diverted, so that some stone falls from inside the crushing drum, avoiding smaller stone pieces from impacting and contacting the crushing blades, which would lead to over-crushing of the stone. Attached Figure Description Figure 1 This is a three-dimensional schematic diagram of the pre-grading mechanism of the present invention; Figure 2 This is a cross-sectional schematic diagram of the pre-grading mechanism of the present invention; Figure 3 This is a three-dimensional schematic diagram of the fine material shaping machine of the present invention; Figure 4 This is a three-dimensional schematic diagram of the crushing component of the present invention; Figure 5 This is a bottom cross-sectional view of the fine material shaping machine of the present invention; Figure 6 This is a front cross-sectional view of the fine material shaping machine of the present invention; Figure 7 This is a schematic diagram of the structure of the central block of the present invention; Figure 8 This is a schematic diagram of the process flow of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Pre-grading mechanism; 101. Grading box; 102. Screening plate; 103. Clearance opening; 104. Receiving box; 105. Vibrator; 106. Resonant spring; 107. Adjusting hydraulic cylinder; 108. Discharge hood; 109. Fine material guide pipe; 110. Extended guide plate; 111. Baffle plate; 112. Drive guide rail; 113. Drive frame; 114. Material straightening hydraulic cylinder; 115. Material straightening frame; 116. Material straightening roller; 2. Fine material shaping machine ; 201. Machine casing; 202. Feed pipe; 203. Discharge chute; 204. Material separator; 205. Material separator plate; 206. Impact pad plate; 207. Impact block; 2071. Center block; 2072. Upper support plate; 2073. Lower support plate; 208. Material distribution cover; 209. Drive motor; 210. Center rod; 211. Center material distribution plate; 212. Material distribution channel; 213. Crushing drum; 214. Crushing blade; 215. Guard plate. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figure 8 As shown, the present invention provides a production process for crushed stone, manufactured sand, and mineral powder, comprising the following steps: Step 1: The mixed stone is fed into the pre-grading mechanism 1, which separates it into coarse and fine materials. The pre-grading mechanism 1 drives the vibrating screen assembly to reciprocate and tilt by adjusting the hydraulic cylinder 107, causing the mixed material to reciprocate on the screen plate 102. This, combined with the vibrator 105 driving the screen plate 102 to vibrate, achieves the screening of the mixed material. Step Two: The coarse and fine materials are fed into the coarse material shaping machine and fine material shaping machine 2 respectively for further crushing and shaping. The coarse material shaping machine utilizes existing technology. The fine material shaping machine 2, through the arrangement of impact pads 206 and impact blocks 207, retains the scattered stone material on the inner wall of the impact pads 206, thereby protecting the impact pads 206 and extending their service life. Step 3: Send the shaped stone into the dust removal system for vacuuming; Step 4: After dust collection, the coarse and fine materials are fed into the classifier for powder selection; Step 5: The selected stone is sent to a storage tank for storage. The production process of this application, by setting up a pre-grading mechanism 1 before stone shaping, pre-grades the stone, directly separating stones of different particle sizes. This eliminates the need for finer stones to enter a high-power, high-energy-consumption coarse material shaping machine, avoiding the problem that all mixed stone is subjected to the same energy impact in a single shaping machine, which could lead to over-crushing of small particles and under-shaping of large particles. This results in a less uniform particle shape and gradation of the product, failing to meet the actual needs of this application for graded production of crushed stone, manufactured sand, and mineral powder.

[0022] Please see Figure 1-7 The present invention also provides a production apparatus for realizing the above-mentioned production processes of crushed stone, manufactured sand and mineral powder, including a pre-grading mechanism 1, a shaping mechanism, a dust removal mechanism and a powder selection mechanism; Please see Figure 1 and Figure 2The pre-grading mechanism 1 includes a grading box 101, inside which a vibrating screening assembly is installed. The vibrating screening assembly includes a receiving box 104, with a screening plate 102 above the receiving box 104. Several resonant springs 106 are fixedly installed between the top edge of the receiving box 104 and the screening plate 102. Vibrators 105 are fixedly installed on both sides inside the receiving box 104. Both ends of the receiving box 104 have clearance openings 103. Adjustable hydraulic cylinders 107 are fixedly installed at both ends of the inner wall of the grading box 101. The output ends of the adjusting hydraulic cylinders 107 are slidably connected to the bottom ends of the receiving box 104. The pre-grading mechanism 1 of this application receives the stone material through the screening plate 102, and uses the vibrators 105 to drive the screening plate 102 to vibrate through the transmission of the resonant springs 106, thus grading the mixed material. The stone is screened; with the help of the hydraulic cylinders 107 at both ends, the mixed stone on the screening plate 102 is driven to reciprocate and tilt along the screening plate 102, so as to achieve full screening of the stone and effectively avoid the problem that large stone particles accumulate at the bottom of the stone during screening in a single posture, causing the screening mesh to close, hindering the falling of other stones, and affecting the screening efficiency. Furthermore, in order to achieve the diversion of stone with different particle sizes, this application provides a coarse material discharge chute 203 on one side of the discharge end of the pre-grading mechanism 1 to receive the coarse material remaining on the screening plate 102 after screening, and a whole material discharge chute 203 on one side of the discharge end of the pre-grading mechanism 1 to receive whole material with a particle size greater than the upper limit of coarse material. By using the hydraulic cylinders 107 to drive the screening plate 102 to tilt in different directions, the coarse material and whole material are diverted.

[0023] In one embodiment, since the screening plate 102 needs to reciprocate tilting motion, in order to prevent the stone material from falling directly into the grading box 101 from the screening end when tilting, and to facilitate the discharge of the stone material to both ends, both ends of the screening plate 102 are fixedly connected with extended guide plates 110. In order to prevent small-volume stone material from spilling out during feeding, a baffle plate 111 is fixedly connected to the top of the extended guide plate 110 near the feeding end of the pre-grading mechanism 1. In order to facilitate the discharge of the fine material obtained by screening, a discharge hood 108 is fixedly connected to the bottom center of the receiving box 104. The inner wall of the discharge hood 108 is inclined, and a fine material guide pipe 109 is fixedly connected to the bottom of the discharge hood 108.

[0024] In one embodiment, see Figure 1A drive guide rail 112 is fixedly installed on the top of the grading box 101. A drive frame 113 is slidably installed on the inner wall of the drive guide rail 112. A material-aligning hydraulic cylinder 114 is fixedly installed in the middle of the drive frame 113. A material-aligning frame 115 is fixedly connected to the output end of the material-aligning hydraulic cylinder 114. This application, by setting the material-aligning frame 115 and coordinating with the control of the material-aligning hydraulic cylinder 114, ensures that the distance between the bottom of the material-aligning frame 115 and the screening plate 102 meets the requirements for the passage of coarse materials, thereby controlling the particle size. For materials larger than the upper limit of coarse material, the material is blocked by the material collection frame 115, and then the drive frame 113 is moved by the drive guide rail 112 to push the material over the baffle plate 111. With the tilting of the screening plate 102, the material enters the material discharge trough 203. The bottom of the material collection frame 115 is rotatably equipped with a material collection roller 116. Through the contact and rotation of the material collection roller 116 with the material, the tilting and adjustment of the material's posture is assisted, which facilitates the pushing and displacement of the material.

[0025] In one embodiment, the shaping mechanism includes a coarse material shaper and a fine material shaper 2. The coarse material shaper adopts a high-power vertical shaft impact crusher in the prior art. Due to the removal of the coarse material and the diversion of the fine material, the amount of stone entering the coarse material shaper is reduced. Therefore, compared with the existing technical solutions, this application can adopt a vertical shaft impact crusher with lower power consumption. Moreover, compared with the vertical shaft impact crusher before diversion, the coarse material shaper of this application receives stone with a more uniform particle size. Therefore, the impact vibration of each component and the working state are more stable, thus having a longer working life.

[0026] In one embodiment, see Figure 3 The fine material shaping machine 2 of this application includes a housing 201, with a feed pipe 202 fixedly connected to the top of the housing 201 and a discharge chute 203 fixedly connected to the bottom of the housing 201. Please refer to [link to relevant documentation]. Figure 5 and Figure 6 An impact pad 206 is fixedly connected to the middle of the inner wall of the housing 201. The impact pad 206 is ring-shaped, and several sets of impact blocks 207 are fixedly connected to the inner wall of the impact pad 206. A crushing component is provided in the middle of the inner wall of the housing 201. By setting the impact blocks 207, this application can block and crush the flying stone during the crushing process, thereby improving the crushing effect of the stone. At the same time, the impact blocks 207 are used to temporarily store the stone, and part of it is supported by the upper support plate 2072 on the top of the impact block 207 and temporarily stored on the impact block 207 under the action of centrifugal force. This makes a protective pad made of stone form inside the impact pad 206. The stone itself is used to support the impact of the stone, thereby reducing the direct impact wear of the impact pad 206 and extending the service life of the impact pad 206.

[0027] In one embodiment, see Figure 7The impact block 207 includes a horizontally set center block 2071. To improve the positional stability of the center block 2071, an upper support plate 2072 is fixedly connected to the top of the center block 2071, and a lower support plate 2073 is fixedly connected to the bottom of the center block 2071. To ensure the impact block 207's ability to retain stone, the inclination of the upper support plate 2072 is less than the inclination of the lower support plate 2073.

[0028] Please see Figure 4 and Figure 6 To guide the stone material fed from the feed pipe 202 to the edge so that it can make stable contact with the crushing component during the fall, this application provides a material distribution cover 208 above the crushing component. The top of the material distribution cover 208 is set upward in a pointed cone shape. To prevent the stone material from flying upward and scattering out during the crushing process, a material separator 204 is fixedly connected to the edge of the material distribution cover 208. Several discharge ports are provided in the middle of the material separator 204. The inner walls of the material discharge ports are fixedly connected to material separator plates 205. The material separator plates 205 are all inclined downward.

[0029] In one embodiment, the crushing assembly includes a drive motor 209, a guard plate 215 fixedly connected to the top of the drive motor 209, the edge of the guard plate 215 being inclined downwards, a drive shaft fixedly connected to the output end of the drive motor 209, a connecting frame fixedly connected to the top of the drive shaft, a crushing drum 213 fixedly connected to the top of the connecting frame, and a plurality of crushing blades fixedly installed on the outer wall of the crushing drum 213; the drive motor 209 drives the crushing drum 213 to rotate, thereby driving the crushing blades to rotate, thereby realizing the impact crushing of the stone.

[0030] In one embodiment, a central rod 210 is fixedly connected to the top of the connecting frame. A plurality of central distribution plates 211 are fixedly connected between the outer wall of the central rod 210 and the crushing drum 213. A through hole is opened in the middle of the plurality of central distribution plates 211. A plurality of distribution channels 212 are opened on the top edge of the distribution cover 208. The size of the distribution channels 212 meets the needs of smaller-diameter stone particles in the fine material. By setting the distribution channels 212, the stone is further diverted to avoid smaller stone particles from impacting and contacting the crushing blade, which would lead to excessive crushing of the stone. The presence of the central rod 210 and the central distribution plates 211 can improve the connection stability of the drive motor 209 and the connecting frame to the crushing drum. The central distribution plates 211 can also assist in breaking and separating the stone during rotation.

[0031] In use, the present invention feeds a mixed stone material consisting of crushed stone, manufactured sand, and mineral powder into the pre-grading mechanism 1 via a pre-feeding device. The material is received by the end of the screening plate 102 near the baffle plate 111. At this time, the adjusting hydraulic cylinders 107 at both ends lift the receiving box 104, causing it to tilt downwards at the end away from the baffle plate 111. This tilts the screening plate 102, causing the mixed stone material to move downwards along the screening plate 102. Simultaneously, the vibrator 105 is activated, causing the receiving box 104 to vibrate. The vibration is then transmitted by the resonant spring 106, causing the screening plate 102 to vibrate, thus screening the mixed stone material. Smaller particles pass through the mesh of the screening plate 102 and fall into the discharge hood 108, then are discharged through the fine material discharge pipe. The process is then completed by alternately adjusting the adjusting hydraulic cylinders 107 at both ends. The lifting height causes the screening plate 102 to tilt and swing back and forth, thereby causing the stone material on it to move back and forth, thus fully realizing screening. During the screening process, the material-forming hydraulic cylinder 114 drives the material-forming frame 115 to rise and fall, so that the gap between the bottom of the material-forming frame 115 and the screening plate 102 meets the needs of coarse material to pass through. The coarse material obtained from screening can pass through the gap and be discharged through the coarse material guide chute. When there is a piece of material in the mixture that exceeds the allowable size of coarse material, it will be blocked by the material-forming frame 115. At this time, the drive guide rail 112 drives the drive frame 113 to move horizontally, and then the material-forming frame 115 pushes the piece of material over the baffle plate 111 and drops it into the material-forming guide chute for delivery. During this period, the rotation of the material-forming roller 116 can drive the piece of material to be flipped and adjusted, so as to achieve stable pushing of the piece of material. Coarse material discharged from the coarse material guide chute is fed into the coarse material shaping machine for crushing and shaping. Fine material discharged from the fine material guide chute is fed into the fine material shaping machine 2 through the feed pipe 202. In the fine material shaping machine 2, it is first received by the distribution hood 208. Smaller stones fall into the crushing drum 213 through the distribution chute 212. The drive motor 209 drives the connecting frame and the central rod 210 to rotate, which in turn drives the central distribution plate 211 to rotate, achieving further dispersal and crushing of the fine material. Its particle size is more uniform. Larger stones are guided by the material distribution hood 208 and pass through the feeding port on the material separator 204. The rotation of the crushing drum 213 drives the rotation of the crushing blade 214, which crushes the stones. Some of the stones are impacted onto the impact pad 206 and come into contact with the impact block 207 or the stones temporarily stored on the impact block 207, achieving further crushing. The fine material after shaping and crushing is sent out from the discharge port at the bottom of the fine material shaping machine 2 and then received by the discharge chute 203. The coarse material from the coarse material feed chute and the fine material from the discharge chute 203 are sent to the dust removal mechanism for dust removal treatment. Then, the dust-removed stone material is sent to the powder classifier for powder selection. The qualified stone material obtained by powder selection is sent to the powder storage tank for temporary storage.

[0032] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for producing crushed stone, manufactured sand, and mineral powder, characterized in that, The system includes a pre-grading mechanism (1), a shaping mechanism, a dust removal mechanism, and a powder selection mechanism. The pre-grading mechanism (1) includes a grading box (101). The grading box (101) is equipped with a vibrating screening assembly. The vibrating screening assembly includes a receiving box (104). A screening plate (102) is provided above the receiving box (104). Several resonant springs (106) are fixedly installed between the top edge of the receiving box (104) and the screening plate (102). Vibrators (105) are fixedly installed on both sides inside the receiving box (104). Both ends of the receiving box (104) are provided with clearance openings (103). Both ends of the inner wall of the grading box (101) are fixedly installed with adjusting hydraulic cylinders (107). The output ends of the adjusting hydraulic cylinders (107) are slidably connected to the bottom ends of the receiving box (104).

2. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 1, characterized in that, A drive rail (112) is fixedly installed on the top of the grading box (101). A drive frame (113) is slidably installed on the inner wall of the drive rail (112). A material-forming hydraulic cylinder (114) is fixedly installed in the middle of the drive frame (113). A material-forming frame (115) is fixedly connected to the output end of the material-forming hydraulic cylinder (114). A material-forming roller (116) is rotatably installed at the bottom of the material-forming frame (115).

3. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 2, characterized in that, Both ends of the screening plate (102) are fixedly connected to an extension guide plate (110), and a baffle plate (111) is fixedly connected to the top of the extension guide plate (110) near the feed end of the pre-grading mechanism (1).

4. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 1, characterized in that, The shaping mechanism includes a coarse material shaping machine and a fine material shaping machine (2). The fine material shaping machine (2) includes a housing (201). A feed pipe (202) is fixedly connected to the top of the housing (201). A discharge chute (203) is fixedly connected to the bottom of the housing (201). An impact pad (206) is fixedly connected to the middle of the inner wall of the housing (201). The impact pad (206) is annular. Several sets of impact blocks (207) are fixedly connected to the inner wall of the impact pad (206). A crushing component is provided in the middle of the inner wall of the housing (201).

5. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 4, characterized in that, The impact block (207) includes a horizontally arranged center block (2071), with an upper support plate (2072) fixedly connected to the top of the center block (2071) and a lower support plate (2073) fixedly connected to the bottom of the center block (2071). The inclination of the upper support plate (2072) is less than that of the lower support plate (2073).

6. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 4, characterized in that, A material distribution hood (208) is provided above the crushing component. The top of the material distribution hood (208) protrudes upward in a pointed cone shape. A material separator (204) is fixedly connected to the edge of the material distribution hood (208). Several material discharge ports are provided in the middle of the material separator (204). A material separator plate (205) is fixedly connected to the inner wall of each of the material discharge ports. The material separator plates (205) are all inclined downward.

7. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 4, characterized in that, The crushing assembly includes a drive motor (209), a guard plate (215) is fixedly connected to the top of the drive motor (209), a drive shaft is fixedly connected to the output end of the drive motor (209), a connecting frame is fixedly connected to the top of the drive shaft, a crushing drum (213) is fixedly connected to the top of the connecting frame, and a plurality of crushing blades (214) are fixedly installed on the outer wall of the crushing drum (213).

8. The apparatus for producing crushed stone, manufactured sand, and mineral powder as described in claim 7, characterized in that, A central rod (210) is fixedly connected to the top of the connecting frame. Several central distribution plates (211) are fixedly connected between the outer wall of the central rod (210) and the crushing drum (213). Through holes are opened in the middle of the several central distribution plates (211). Several distribution channels (212) are opened on the top edge of the distribution cover (208).

9. A process for producing crushed stone, manufactured sand, and mineral powder, applied to a crushed stone, manufactured sand, and mineral powder production apparatus as described in claim 1, characterized in that, Includes the following steps: Step 1: Feed the mixed stone into the pre-grading mechanism (1) to grade it into coarse and fine materials; Step 2: Feed the coarse and fine materials into the coarse material shaping machine and the fine material shaping machine (2) respectively for further crushing and shaping; Step 3: Send the shaped stone into the dust removal system for vacuuming; Step 4: After dust collection, the coarse and fine materials are fed into the classifier for powder selection; Step 5: Transfer the selected stone materials into the powder storage tank for storage.

10. The process for producing crushed stone, manufactured sand, and mineral powder as described in claim 9, characterized in that, In step one, the pre-grading mechanism (1) drives the vibrating screening assembly to reciprocate and tilt by adjusting the hydraulic cylinder (107), so that the mixture moves back and forth on the screening plate (102), and the vibrator (105) drives the screening plate (102) to vibrate, thereby achieving screening of the mixture.

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