Preparation method of fly ash perforated brick

Abstract

The invention discloses a fly ash perforated brick preparation method, and belongs to the technical field of perforated brick preparation, the technical scheme is characterized in that gangue, limestone and fly ash are mixed, crushed and ground through a crusher, and the crusher comprises a crushing roller, a grinding disc and a sieving mechanism; the screening mechanism comprises a screen frame, a first driving motor, a first gear and a second gear, the first gear is installed on the first driving motor, the second gear is installed on the screen frame, and the first gear is meshed with the second gear. The screening efficiency of the crushed raw materials is improved, and the production efficiency of the porous bricks is further improved.

Description

Technical Field

[0001] The present application belongs to the technical field of porous brick manufacturing, and in particular to a method for preparing fly ash porous bricks. Background Art

[0002] Fly ash is a relatively common industrial waste with a simple acquisition process, abundant resources and low price. Therefore, waste coal slag or blocky coal ash blocks in industrial waste can be sorted and ground and widely used in cement, building materials, concrete, construction, chemical industry, agriculture and many other fields to achieve secondary recycling of resources; porous bricks have the characteristics of low production energy consumption, soil saving and waste utilization, convenient construction, light weight, high strength, good thermal insulation effect, durability, small shrinkage and deformation, and regular appearance. According to the production materials, porous bricks can be divided into the following common types, including sintered clay porous bricks, coal gangue porous bricks, shale porous bricks, fly ash porous bricks, etc. When preparing fly ash porous bricks, the waste coal slag needs to be crushed and ground to make fly ash porous bricks.

[0003] The existing Chinese patent with publication number CN107459363B discloses a porous brick and a preparation method thereof. The porous brick is composed of the following raw materials in mass fraction: 5-10 parts of clay, 5-12 parts of cement, 38-46 parts of gangue, 12-24 parts of limestone, 10-16 parts of coal powder, and 2-6 parts of composite additives. The preparation method of the porous brick comprises the following steps: (1) batching; (2) crushing, mixing, and grinding; (3) adding water to the raw materials obtained in step (2) to obtain a mixture; (4) aging; (5) extrusion and blanking; (6) drying; (7) sintering and forming.

[0004] Although the preparation of the above-mentioned porous bricks is efficient, the existing device needs to screen the raw materials after crushing them. The existing screening efficiency is low, and improvements are made to this. Summary of the invention

[0005] The purpose of this application is to provide a method for preparing fly ash porous bricks in order to address the above-mentioned technical problems, improve the screening efficiency of raw materials after crushing, and further improve the production efficiency of porous bricks.

[0006] The present application provides a method for preparing fly ash porous bricks, the specific steps of which include:

[0007] S1, batching, preparing raw materials in a certain proportion, including: clay, cement, gangue, limestone, fly ash, composite additives;

[0008] S2, mixing, crushing and grinding gangue, limestone and fly ash, and then continuing to mix clay, cement and composite additives;

[0009] S3, placing the mixture in an aging chamber and sealing it for 2-3 days, during which time spraying is performed;

[0010] S4, after aging, the material is sent to a brick making machine, vacuum extruded, cut into bricks, and then cooled;

[0011] S5, sending the bricks into a drying room for drying, and then putting them into a sintering kiln for sintering;

[0012] Among them, gangue, limestone and fly ash are mixed, crushed and ground by a crusher. The crusher includes a crushing roller, a grinding disc and a screening mechanism. The screening mechanism includes a screen frame, a first drive motor, a first gear and a second gear. The first gear is installed on the first drive motor, and the second gear is installed on the screen frame. The first gear is meshed with the second gear.

[0013] The larger materials in the raw materials are mixed, crushed and ground by a pulverizer. The pulverizer crushes the materials by a crushing roller and grinds the materials by a grinding disc. A screening mechanism is provided between the crushing roller and the grinding disc to improve the grinding efficiency of the grinding disc. The raw materials crushed by the crushing roller fall onto the screening mechanism. The rotation of the screen frame is controlled by the first driving motor, thereby realizing the relative movement between the raw materials on the screen frame and the screen frame, controlling the rapid screening of the raw materials on the screen frame. The first driving motor is connected to the screen frame by a first gear and a second gear for gear transmission.

[0014] Furthermore, the pulverizer also includes:

[0015] The frame is provided with a discharge port at the bottom;

[0016] A hopper is mounted on the frame;

[0017] A material guide plate is placed between the screen frame and the grinding disc;

[0018] A circulation mechanism, used for circulating raw materials that cannot pass through the screening mechanism to the hopper, wherein the circulation mechanism is installed on the frame;

[0019] Wherein, the crushing roller, grinding disc and screening mechanism are installed on the frame.

[0020] The crushing roller, grinding disc, screening mechanism, hopper, guide plate and circulation mechanism are all installed on the frame. The raw materials are placed in the hopper, the crushing roller is placed under the hopper, and the crushing roller is driven to rotate to continuously crush the raw materials in the hopper. After crushing, the raw materials fall onto the screen frame for screening. The screened raw materials enter the grinding disc through the guide plate for grinding. The raw materials ground by the grinding disc are discharged through the discharge port of the frame. The larger particles of raw materials on the screening mechanism are re-conveyed to the hopper through the circulation mechanism and crushed again by the crushing roller.

[0021] Furthermore, the screening mechanism further comprises:

[0022] An impact seat is placed on the lower side of the screen frame;

[0023] An impact block, corresponding to the impact seat;

[0024] A mounting portion, disposed on the lower side of the screen frame;

[0025] A movable rod, fixedly connected to the impact block and movably connected to the mounting portion;

[0026] A first spring, disposed between the impact block and the mounting portion;

[0027] A snap-fit ​​piece, movably mounted on the mounting portion;

[0028] An abutment seat, connected to the frame and movably mounted on the lower side of the screen frame;

[0029] Wherein, the movable rod is provided with a buckling portion corresponding to the buckling piece, and the abutment seat is provided with a wedge-shaped portion, and the wedge-shaped portion corresponds to between the buckling piece and the mounting portion.

[0030] The screen frame is reciprocated by the first driving motor. As the screen frame moves, the abutment seat acts on the impact block to move the impact block, and the buckle portion on the movable rod of the corresponding impact block is buckled with the corresponding buckle piece. Then the relative movement direction of the abutment seat and the mounting portion is changed to the opposite direction, so that a group of buckle portions and the buckle pieces are buckled contact and buckled through the wedge-shaped portion. The impact block hits the moving rod of the impact seat under the action of the first spring, and the vibration generated by the collision between the impact block and the impact seat provides vibration to the screen frame, thereby improving the screening efficiency of the screen frame. Then the buckle portion corresponding to the other impact block is buckled with the buckle piece, and the continuous collision between the impact block and the impact seat is controlled through the reciprocating rotation of the screen frame, thereby improving the screening efficiency of the screen frame.

[0031] Furthermore, the frame is provided with a first electromagnetic part, and the abutting seat is provided with a second electromagnetic part, and the first electromagnetic part corresponds to the second electromagnetic part.

[0032] The abutment seat and the frame are connected through the first electromagnetic part and the second electromagnetic part. When the screen frame needs to rotate in the same direction, the first electromagnetic part and the second electromagnetic part release the interaction, so that the abutment seat rotates simultaneously with the screen frame. When the screen frame needs to vibrate by colliding with each other through the impact seat and the impact block, the abutment seat is magnetically fixed to the frame through the first electromagnetic part and the second electromagnetic part.

[0033] Furthermore, the screen frame is provided with a movable groove, which is T-shaped, the abutment seat is provided with a sliding portion corresponding to the movable groove, the bottom of the abutment seat is provided with a first abutment portion, the impact block is provided with a second abutment portion corresponding to the first abutment portion, and the first abutment portion is provided with a pressure sensor.

[0034] The movable groove and the sliding part are used to improve the activity stability between the abutment seat and the screen frame. The first abutment part and the second abutment part are used to act on the impact block to move the impact block. The pressure sensor is used to detect the state of the impact block, so as to judge the changes in the forward and reverse rotation of the first drive motor.

[0035] Furthermore, the circulation mechanism comprises:

[0036] Negative pressure port, placed on the rack;

[0037] A negative pressure chamber is installed on the hopper;

[0038] A negative pressure device is installed in the negative pressure chamber;

[0039] The movable plate is placed at the bottom of the negative pressure chamber, and a cylinder is arranged between the movable plate and the hopper.

[0040] When there are large volumes of raw materials on the screen frame, the screen frame is controlled to rotate and the raw materials are moved to the edge of the screen frame. When the raw materials pass through the negative pressure port, the suction force of the negative pressure port draws the large volume of raw materials into the negative pressure chamber, and negative pressure is generated in the negative pressure chamber through the negative pressure device. When more raw materials are collected in the negative pressure chamber, the movable plate is driven to open by the cylinder to let the raw materials in the negative pressure chamber fall back into the hopper.

[0041] Further, the grinding disc comprises:

[0042] The grinding base is placed on the frame;

[0043] A second driving motor is mounted on the frame;

[0044] A third gear is mounted on the output shaft of the second driving motor;

[0045] The fourth gear is mounted on the grinding disc.

[0046] The grinding base is fixedly connected to the frame, and the grinding disc is driven to rotate by the second drive motor. The raw material is guided to the middle position of the grinding disc through the guide plate, and then the ground raw material is discharged through the edge of the grinding base through grinding between the grinding disc and the grinding base. The second drive motor and the grinding disc are connected through the third gear and the third gear transmission.

[0047] Furthermore, the guide plate comprises:

[0048] Water inlets are evenly distributed on the guide plate;

[0049] A water delivery valve, installed at the water delivery port, provided with a press valve seat;

[0050] Wherein, the grinding disc is provided with a pressing roller corresponding to the pressing valve seat.

[0051] Water is sprayed into the guide plate through the water inlet and the water valve to improve the smoothness of the flow of the raw materials on the guide plate into the grinding disc. When the grinding disc rotates, the pressing roller is pressed on the pressing valve seat of the water valve to open the water valve, thereby controlling the water delivery speed of the water valve to match the grinding speed of the grinding disc, thereby ensuring the stability of the water content of the raw materials after grinding.

[0052] The beneficial effects of this application are:

[0053] 1. The raw materials crushed by the crushing roller fall onto the screening mechanism, and the first driving motor controls the rotation of the screen frame, thereby realizing the relative movement between the raw materials on the screen frame and the screen frame, and controlling the rapid screening of the raw materials on the screen frame.

[0054] 2. The larger particles of raw materials on the screening mechanism are transported back to the hopper through the circulation mechanism and crushed again by the crushing roller.

[0055] 3. The vibration generated by the impact of the impact block and the impact seat provides vibration to the screen frame, thereby improving the screening efficiency of the screen frame. Through the reciprocating rotation of the screen frame, the continuous impact between the impact block and the impact seat is controlled to improve the screening efficiency of the screen frame.

[0056] 4. Spray water into the guide plate through the water inlet and water valve to improve the smoothness of the flow of raw materials on the guide plate to the grinding disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the structure of the pulverizer of this application;

[0058] Figure 2 A cross-sectional view of the pulverizer of the present application;

[0059] Figure 3 This is a schematic diagram of the structure of the impact seat of the present application;

[0060] Figure 4 For this application Figure 2 A magnified view of point A;

[0061] Reference numerals in the figure are as follows: 100, crushing roller; 200, grinding disc; 210, grinding base; 220, second driving motor; 230, third gear; 240, fourth gear; 250, pressing roller; 300, screening mechanism; 310, screen frame; 311, mounting portion; 312, movable groove; 320, first driving motor; 330, second gear; 340, impact seat; 350, impact block; 351, movable rod; 352, buckle portion; 353, second abutment portion; 360, first spring; 370, snap-fit ​​part; 380, abutment seat; 381, wedge-shaped part; 382, ​​second electromagnetic part; 383, sliding part; 384, first abutment part; 385, pressure sensor; 400, frame; 401, discharge port; 410, hopper; 420, guide plate; 421, water delivery port; 422, water delivery valve; 423, pressure valve seat; 430, first electromagnetic part; 500, circulation mechanism; 510, negative pressure port; 520, negative pressure chamber; 530, negative pressure device; 540, movable plate; 550, cylinder. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0063] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0064] The following provides a detailed description of the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0065] Embodiment 1:

[0066] like Figure 1-Figure 4 As shown, the embodiment of the present application provides a method for preparing fly ash porous bricks, and the specific steps include:

[0067] S1, batching, preparing raw materials in a certain proportion, including: clay, cement, gangue, limestone, fly ash, composite additives;

[0068] S2, mixing, crushing and grinding gangue, limestone and fly ash, and then continuing to mix clay, cement and composite additives;

[0069] S3, placing the mixture in an aging chamber and sealing it for 2-3 days, during which time spraying is performed;

[0070] S4, after aging, the material is sent to a brick making machine, vacuum extruded, cut into bricks, and then cooled;

[0071] S5, sending the bricks into a drying room for drying, and then putting them into a sintering kiln for sintering;

[0072] Among them, gangue, limestone and fly ash are mixed, crushed and ground by a crusher. The crusher includes a crushing roller 100, a grinding disc 200 and a screening mechanism 300. The screening mechanism 300 includes a screen frame 310, a first drive motor 320, a first gear and a second gear 330. The first gear is installed on the first drive motor 320, and the second gear 330 is installed on the screen frame 310. The first gear is meshed with the second gear 330.

[0073] The larger materials in the raw materials are mixed, crushed and ground by a pulverizer. The pulverizer crushes the materials by a crushing roller 100 and grinds the materials by a grinding disc 200. A screening mechanism 300 is provided between the crushing roller 100 and the grinding disc 200 to improve the grinding efficiency of the grinding disc 200. The raw materials crushed by the crushing roller 100 fall onto the screening mechanism 300. The rotation of the screen frame 310 is controlled by the first driving motor 320, so as to realize the relative movement between the raw materials on the screen frame 310 and the screen frame 310, and control the rapid screening of the raw materials on the screen frame 310. The first driving motor 320 and the screen frame 310 are connected by a first gear and a second gear 330 for gear transmission.

[0074] Furthermore, the pulverizer also includes:

[0075] The frame 400 is provided with a discharge port 401 at the bottom;

[0076] A hopper 410 is mounted on the frame 400;

[0077] The guide plate 420 is placed between the screen frame 310 and the grinding disc 200;

[0078] A circulation mechanism 500, used for circulating the raw materials that cannot pass through the screening mechanism 300 to the hopper 410, wherein the circulation mechanism 500 is installed on the frame 400;

[0079] The crushing roller 100 , the grinding disc 200 , and the screening mechanism 300 are installed on a frame 400 .

[0080] The crushing roller 100, the grinding disc 200, the screening mechanism 300, the hopper 410, the guide plate 420, and the circulation mechanism 500 are all installed on the frame 400. The raw materials are placed in the hopper 410, the crushing roller 100 is placed under the hopper 410, and the crushing roller 100 is driven to rotate to continuously crush the raw materials in the hopper 410. After crushing, the raw materials fall onto the screen frame 310 for screening. The screened raw materials enter the grinding disc 200 through the guide plate 420 for grinding. The raw materials ground by the grinding disc 200 are discharged through the discharge port 401 of the frame 400. The larger particles of raw materials on the screening mechanism 300 are re-conveyed to the hopper 410 through the circulation mechanism 500 and are crushed again by the crushing roller 100.

[0081] Furthermore, the screening mechanism 300 further includes:

[0082] The impact seat 340 is placed on the lower side of the screen frame 310;

[0083] The impact block 350 corresponds to the impact seat 340;

[0084] The mounting portion 311 is disposed on the lower side of the screen frame 310;

[0085] The movable rod 351 is fixedly connected to the impact block 350 and movably connected to the mounting portion 311;

[0086] A first spring 360 is disposed between the impact block 350 and the mounting portion 311;

[0087] A buckle 370 is movably mounted on the mounting portion 311;

[0088] The abutment seat 380 is connected to the frame 400 and movably mounted on the lower side of the screen frame 310;

[0089] The movable rod 351 is provided with a locking portion 352 corresponding to the locking member 370 , and the abutment seat 380 is provided with a wedge-shaped portion 381 , and the wedge-shaped portion 381 corresponds to between the locking member 370 and the mounting portion 311 .

[0090] The screen frame 310 is reciprocated by the first driving motor 320. As the screen frame 310 moves, the abutment seat 380 acts on the impact block 350, so that the impact block 350 moves, and the buckle portion 352 on the movable rod 351 of the corresponding impact block 350 is buckled with the corresponding buckle member 370. Then, the relative movement direction of the abutment seat 380 and the mounting portion 311 is changed to the opposite direction, so that the buckle portion 352 and the buckle member 370 are buckled in contact through the wedge portion 381. Under the action of the first spring 360, the impact block 350 impacts the moving rod of the impact seat 340, and the vibration generated by the impact of the impact block 350 and the impact seat 340 provides vibration to the screen frame 310, thereby improving the screening efficiency of the screen frame 310, and then the corresponding buckle part 352 of another impact block 350 is buckled with the buckle 370, and the reciprocating rotation of the screen frame 310 controls the continuous collision between the impact block 350 and the impact seat 340, thereby improving the screening efficiency of the screen frame 310.

[0091] Furthermore, the frame 400 is provided with a first electromagnetic part 430 , and the abutting seat 380 is provided with a second electromagnetic part 382 , and the first electromagnetic part 430 corresponds to the second electromagnetic part 382 .

[0092] The abutment seat 380 is connected to the frame 400 through the first electromagnetic part 430 and the second electromagnetic part 382. When the screen frame 310 needs to rotate in the same direction, the first electromagnetic part 430 and the second electromagnetic part 382 release the interaction, so that the abutment seat 380 rotates simultaneously with the screen frame 310. When the screen frame 310 needs to vibrate by colliding with each other through the impact seat 340 and the impact block 350, the abutment seat 380 is magnetically fixed to the frame 400 through the first electromagnetic part 430 and the second electromagnetic part 382.

[0093] Furthermore, the screen frame 310 is provided with a movable groove 312, and the movable groove 312 is T-shaped. The abutment seat 380 is provided with a sliding portion 383 corresponding to the movable groove 312, and the bottom of the abutment seat 380 is provided with a first abutment portion 384. The impact block 350 is provided with a second abutment portion 353 corresponding to the first abutment portion 384, and the first abutment portion 384 is provided with a pressure sensor 385.

[0094] The movable groove 312 and the sliding part 383 are used to improve the activity stability between the abutment seat 380 and the screen frame 310. The first abutment part 384 and the second abutment part 353 are used to act on the impact block 350 to move the impact block 350. The pressure sensor 385 is used to detect the state of the impact block 350, so as to judge the changes in the forward and reverse rotation of the first drive motor 320.

[0095] Embodiment 2:

[0096] like Figure 2 , Figure 4 As shown, the embodiment of the present application provides a method for preparing fly ash porous bricks. In addition to the above technical features, the circulation mechanism 500 further includes:

[0097] A negative pressure port 510 is disposed on the frame 400;

[0098] A negative pressure chamber 520 is installed on the hopper 410;

[0099] A negative pressure device 530 is installed in the negative pressure chamber 520;

[0100] The movable plate 540 is disposed at the bottom of the negative pressure chamber 520 , and a cylinder 550 is disposed between the movable plate 540 and the hopper 410 .

[0101] When there are a large amount of raw materials of a larger volume on the screen frame 310, the screen frame 310 is controlled to rotate and the raw materials are moved to the edge of the screen frame 310. When the raw materials pass through the negative pressure port 510, the suction force of the negative pressure port 510 draws the raw materials of a larger volume into the negative pressure chamber 520, and a negative pressure is generated in the negative pressure chamber 520 by the negative pressure device 530. When a large amount of raw materials are collected in the negative pressure chamber 520, the movable plate 540 is driven to open by the cylinder 550, and the raw materials in the negative pressure chamber 520 fall back into the hopper 410.

[0102] Embodiment 3:

[0103] like Figure 1 , Figure 2 As shown, the embodiment of the present application provides a method for preparing fly ash porous bricks. In addition to the above technical features, the grinding disc 200 further includes:

[0104] The grinding base 210 is placed on the frame 400;

[0105] The second driving motor 220 is mounted on the frame 400;

[0106] The third gear 230 is mounted on the output shaft of the second driving motor 220;

[0107] The fourth gear 240 is mounted on the grinding disc 200 .

[0108] The grinding base 210 is fixedly connected to the frame 400, and the grinding disc 200 is driven to rotate by the second drive motor 220. The raw material is guided to the middle position of the grinding disc 200 through the guide plate 420, and then the ground raw material is discharged through the edge of the grinding base 210 through the grinding between the grinding disc 200 and the grinding base 210. The second drive motor 220 and the grinding disc 200 are connected through the third gear 230 and the third gear 230.

[0109] Furthermore, the guide plate 420 includes:

[0110] The water delivery ports 421 are evenly distributed on the guide plate 420;

[0111] The water delivery valve 422 is installed at the water delivery port 421 and is provided with a pressing valve seat 423;

[0112] The grinding disc 200 is provided with a pressing roller 250 corresponding to the pressing valve seat 423 .

[0113] Water is sprayed into the guide plate 420 through the water delivery port 421 and the water delivery valve 422 to improve the smoothness of the flow of the raw materials on the guide plate 420 into the grinding disc 200. When the grinding disc 200 rotates, the pressing roller 250 is pressed on the pressing valve seat 423 of the water delivery valve 422 to open the water delivery valve 422, thereby controlling the water delivery speed of the water delivery valve 422 to match the grinding speed of the grinding disc 200, thereby ensuring the stability of the water content of the raw materials after grinding.

[0114] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0115] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for preparing fly ash porous bricks, characterized in that: The specific steps include: S1, batching, preparing raw materials in a certain proportion, including: clay, cement, gangue, limestone, fly ash, composite additives; S2, mixing, crushing and grinding gangue, limestone and fly ash, and then continuing to mix clay, cement and composite additives; S3, placing the mixture in an aging chamber and sealing it for 2-3 days, during which time spraying is performed; S4, after aging, the material is sent to a brick making machine, vacuum extruded, cut into bricks, and then cooled; S5, sending the bricks into a drying room for drying, and then putting them into a sintering kiln for sintering; Gangue, limestone and fly ash are mixed, crushed and ground by a pulverizer, the pulverizer comprises a crushing roller (100), a grinding disc (200) and a screening mechanism (300), the screening mechanism (300) comprises a screen frame (310), a first drive motor (320), a first gear and a second gear (330), the first gear is mounted on the first drive motor (320), the second gear (330) is mounted on the screen frame (310), and the first gear is meshed with the second gear (330).

2. The method for preparing fly ash porous bricks according to claim 1, characterized in that: The pulverizer also includes: The frame (400) is provided with a discharge port (401) at the bottom; A hopper (410) is mounted on the frame (400); A material guide plate (420) is disposed between the screen frame (310) and the grinding disc (200); A circulation mechanism (500) is used to circulate raw materials that cannot pass through the screening mechanism (300) into the hopper (410), and the circulation mechanism (500) is installed on the frame (400); The crushing roller (100), the grinding disc (200), and the screening mechanism (300) are installed on a frame (400).

3. The method for preparing fly ash porous bricks according to claim 2, characterized in that: The screening mechanism (300) further comprises: An impact seat (340) is disposed on the lower side of the screen frame (310); An impact block (350) corresponding to the impact seat (340); A mounting portion (311) is disposed on the lower side of the screen frame (310); A movable rod (351) is fixedly connected to the impact block (350) and movably connected to the mounting portion (311); A first spring (360) is disposed between the impact block (350) and the mounting portion (311); A buckle member (370) is movably mounted on the mounting portion (311); An abutment seat (380) connected to the frame (400) and movably mounted on the lower side of the screen frame (310); The movable rod (351) is provided with a buckle portion (352) corresponding to the buckle (370), and the abutment seat (380) is provided with a wedge portion (381), and the wedge portion (381) corresponds to between the buckle (370) and the mounting portion (311).

4. The method for preparing fly ash porous bricks according to claim 3, characterized in that: The frame (400) is provided with a first electromagnetic part (430), and the abutment seat (380) is provided with a second electromagnetic part (382), and the first electromagnetic part (430) corresponds to the second electromagnetic part (382).

5. The method for preparing fly ash porous bricks according to claim 4, characterized in that: The screen frame (310) is provided with a movable groove (312) which is T-shaped, the abutment seat (380) is provided with a sliding portion (383) corresponding to the movable groove (312), the bottom of the abutment seat (380) is provided with a first abutment portion (384), the impact block (350) is provided with a second abutment portion (353) corresponding to the first abutment portion (384), and the first abutment portion (384) is provided with a pressure sensor (385).

6. The method for preparing fly ash porous bricks according to claim 5, characterized in that: The circulation mechanism (500) comprises: A negative pressure port (510) is disposed on the frame (400); A negative pressure chamber (520) is installed on the hopper (410); A negative pressure device (530) is installed in the negative pressure chamber (520); The movable plate (540) is placed at the bottom of the negative pressure chamber (520), and a cylinder (550) is provided between the movable plate (540) and the hopper (410).

7. The method for preparing fly ash porous bricks according to claim 6, characterized in that: The grinding disc (200) comprises: A grinding base (210) is placed on a frame (400); A second driving motor (220) is mounted on the frame (400); A third gear (230) is mounted on the output shaft of the second driving motor (220); The fourth gear (240) is mounted on the grinding disc (200).

8. The method for preparing fly ash porous bricks according to claim 7, characterized in that: The guide plate (420) comprises: The water delivery ports (421) are evenly distributed on the guide plate (420); A water delivery valve (422) is installed at the water delivery port (421) and is provided with a pressing valve seat (423); Wherein, the grinding disc (200) is provided with a pressing roller (250) corresponding to the pressing valve seat (423).

Images