Limestone crushing device and method for cement clinker production

Abstract

The invention relates to the technical field of building materials, in particular to a limestone crushing device for cement clinker production and a crushing method.The limestone crushing device comprises an impact crusher body, a rotor, an impact device, a lead screw adjusting assembly and a feeding device; the crushing method comprises the four steps of feeding, crushing, dust removal and iron removal, through the arrangement of the feeding device, the production efficiency is improved, the production cost is reduced, adhesion of crushed limestone is prevented, through the arrangement of the dust removal equipment connecting assembly, the dust removal efficiency is improved, and the dust removal efficiency is improved. And large particles are prevented from entering the dust removal equipment, the effect of filtering the large particles in the dust removal process is improved, the magnetic adsorption mechanism can adsorb iron impurities generated during crushing, the service life of the plate hammer and the impact plate is further prolonged, and the purity of crushed limestone is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a limestone crushing device and a crushing method for cement clinker production. Background Art

[0002] Limestone is one of the main raw materials for cement production, providing the calcium component. Its primary chemical component is calcium carbonate, which decomposes at high temperatures to produce calcium oxide (quicklime) and carbon dioxide. Calcium oxide is a core component of cement clinker, comprising approximately 60-65% of the total clinker. Limestone is mixed with other raw materials, such as clay, sandstone, and iron ore, in appropriate proportions to ensure the appropriate levels of silicon (silicon dioxide), aluminum (aluminum oxide), and iron (iron oxide) in the clinker, forming mineral phases such as tricalcium silicate and dicalcium silicate.

[0003] Existing cement clinker production requires crushing limestone and other raw materials (such as clay and iron powder), mixing them in appropriate proportions, and then pre-homogenizing them to ensure a stable composition. Limestone is typically crushed using a jaw crusher for primary crushing, followed by secondary crushing using an impact crusher.

[0004] Existing impact crushers generally generate a large amount of dust when crushing limestone. The commonly used dust removal methods are generally bag dust removal or spray dust removal. Bag dust removal generally uses a fan to direct the dust-laden airflow into the dust collection bag for filtering. However, this dust removal method will cause some gravel to be splashed by the impact plate and enter the air intake duct, causing damage to the fan rotor and ventilation duct.

[0005] In addition, when feeding, general impact crushers usually have more material in the center and less on both sides, and commonly used impact crushers are generally not equipped with an equal distribution structure, so the wear of the hammer and impact plate in the middle is much higher than the wear at the two ends, which requires more frequent replacement of the hammer and impact plate, increasing production costs and requiring frequent shutdowns for inspection and replacement, reducing production efficiency. Summary of the Invention

[0006] (1) Technical problems solved In view of the shortcomings of the existing technology, the present invention provides a limestone crushing device and crushing method for cement clinker production, which has the advantages of uniform feeding, uniform wear of plate hammers, reduced maintenance efficiency, and protection of fans and dust removal equipment during dust removal.

[0007] (2) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a limestone crushing device for cement clinker production, comprising an impact crusher body, a rotor, an impact device, a screw adjustment assembly and a feeding device, the impact crusher body consisting of an upper shell and a lower shell, the upper shell and the lower shell are hinged and rotatable, the rotor is arranged between the upper shell and the lower shell, a shaft seat is installed on the outer side of the lower shell, the rotor is installed on the shaft seat, the rotor consists of a main shaft, a turntable, a plate hammer and a striking block, two groups of impact devices are installed inside the upper shell, and one group is installed inside the lower shell, the impact device consists of a mounting plate, a connecting frame, a positioning shaft and an impact plate, the end of the screw adjustment assembly is connected to the back of the impact device, the screw adjustment assembly consists of an articulated seat hinged with the connecting frame, a transmission screw connected to the articulated seat and a fixing frame threadedly connected to the transmission screw, the fixing frame is installed on the outer wall of the impact crusher body, and the feeding device is installed on the feed port of the upper shell; A dust removal equipment connection assembly is provided on the top of the upper shell, and a magnetic adsorption mechanism is installed on the counterattack device located inside the lower shell.

[0008] Preferably, the main shaft is rotatably connected to the shaft seat, a transmission pulley is installed at the input end of the main shaft, the transmission pulley is transmission-connected to the external power input device, the turntable is installed on the main shaft, the plate hammer is arranged in multiple and evenly installed on the outer edge of the turntable, the striking block is installed at the edge of the plate hammer by bolts, and the material of the striking block is a high-hardness alloy.

[0009] Preferably, the positioning shaft is mounted on the inner wall of the impact crusher body, the connecting frame is rotatably connected to the positioning shaft, a plurality of mounting plates are provided and mounted on the connecting frame, and the impact plates are evenly mounted on the surface of the mounting plates.

[0010] Preferably, the feeding device consists of a feed hopper, an electric cylinder, a fixed block, a sliding block, a reciprocating push rod and a dividing plate. The feed hopper is installed at the feed port of the upper shell, the electric cylinder is installed on the top of the feed hopper, the output end of the electric cylinder is arranged inside the feed hopper, and the fixed block is arranged on the output end of the electric cylinder. Slide grooves are provided on the top and side surfaces of the sliding block, and the fixed block is slidably connected to the slide grooves on the top surface of the sliding block. The reciprocating push rod is installed on the outer wall of the feed hopper, and the output end of the reciprocating push rod is slidably connected to the slide grooves on the side surfaces of the sliding block. Multiple groups of conical protrusions are provided on the front of the sliding block, the dividing plate is conically arranged and arranged on the inner bottom surface of the feed hopper, and the dividing plate is arranged on the rear side of the sliding block.

[0011] Preferably, a bottom heating plate is installed at the bottom of the feed hopper, a side heating plate is installed on the back of the distribution plate, and an electric heater is provided at the bottom of the feed hopper, which is electrically connected to the bottom heating plate and the side heating plate through wires.

[0012] Preferably, the dust removal equipment connection assembly consists of a vent pipe arranged on the top of the upper shell, a protective cover installed at the bottom of the vent pipe, and a flange connection pipe installed at the top of the vent pipe. A shielding cover is provided inside the protective cover. The shielding cover is conical in shape. A curved flange is provided on the outer wall of the shielding cover, and the bending direction of the curved flange is away from the shielding cover. A baffle is installed on the inner wall of the vent pipe, the baffle is provided on the outside of the shielding cover, and an annular flange is provided on the baffle. The annular flange is provided above the curved flange, and there is a gap between the annular flange and the curved flange.

[0013] Preferably, the magnetic adsorption mechanism consists of a controller and an electromagnetic generator, which are installed on a mounting plate at the lowest end of the counter-attack device located inside the lower shell. The controller is arranged on the back of the mounting plate, and the electromagnetic generator is arranged on the front of the mounting plate. The electromagnetic generator is conductively connected to the controller, and a built-in coil and an iron core are arranged inside the electromagnetic generator. The counter-attack plate is installed above the electromagnetic generator.

[0014] Preferably, a method for crushing limestone for cement clinker production, using a limestone crushing device for cement clinker production as claimed in the claims, comprises the following steps: S1: Feeding: The coarsely crushed limestone is fed into the inside of the impact crusher through the feeding device. When feeding, the feeding device can evenly divide the limestone so that the wear degree of different positions of the rotor is consistent.

[0015] S2: Crushing: The evenly divided limestone is crushed by passing it through the hammer on the rotor, the impact block and the impact plate on the impact device. The distance between the impact plate and the hammer can be adjusted by the screw adjustment component, thereby adjusting the particle size of the crushed limestone.

[0016] S3: Dust removal: The dust removal equipment connection component can be connected to the external bag dust collector and fan. The dust-laden flue gas generated by the crushing of limestone inside the impact crusher body is extracted by the fan and introduced into the bag dust collector for dry dust removal. When the dust-laden flue gas is extracted, the larger particles splashed by the crushing and collision in the dust-laden flue gas are filtered through the dust removal equipment connection component to prevent the larger particles from entering the fan or bag dust collector.

[0017] S4: Iron removal: Limestone generally contains metal impurities, and iron impurities are generally the largest impurities. When crushing, turn on the magnetic adsorption mechanism, and then use the magnetic adsorption mechanism to adsorb the iron impurities after the final small particle crushing, so that the iron impurities adhere to the impact plate to prevent the wear between the hammer and the impact plate from increasing.

[0018] S5: Discharging: The crushed limestone particles are discharged from the bottom of the impact crusher body. When all the limestone particles are discharged, the magnetic adsorption mechanism is closed and the iron material is discharged.

[0019] (3) Beneficial effects Compared with the prior art, the present invention provides a limestone crushing device and crushing method for cement clinker production, which has the following beneficial effects: 1. This application can adjust the feeding amount and feeding uniformity of limestone during feeding by setting up the feeding device, thereby reducing the replacement frequency of the hammer, thereby improving production efficiency and reducing production costs; in addition, the limestone can be heated by setting up the bottom heating plate and the side heating plate, thereby reducing the moisture content of the limestone, further improving the crushing efficiency and preventing the adhesion of the crushed limestone.

[0020] 2. This application can block larger particles generated by collisions during the dust removal process by setting up a dust removal equipment connection component, preventing larger particles from entering the interior of the dust removal equipment, thereby improving the effect of filtering larger particles during dust removal.

[0021] 3. The magnetic adsorption mechanism of this application can adsorb the iron impurities generated by crushing, preventing the iron impurities from causing serious damage to the hammer and impact plate, and also remove impurities from the crushed limestone, thereby further increasing the service life of the hammer and impact plate and improving the purity of the crushed limestone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 This is a front cross-sectional structural diagram of the present invention; Figure 4 Schematic diagram of the rotor structure of the present invention; Figure 5 It is a structural schematic diagram of the feeding device of the present invention; Figure 6 It is a side structural schematic diagram of the feeding device of the present invention; Figure 7 This is a schematic diagram of the connection structure between the sliding retaining frame, the electric cylinder and the reciprocating push rod of the present invention; Figure 8 This is a schematic diagram of the internal structure of the connection assembly of the dust removal equipment of the present invention; Figure 9 This is a schematic structural diagram of the counterattack device of the present invention; Figure 10 Schematic diagram of the transmission connection structure between the counterattack device and the screw adjustment assembly of the present invention; Figure 11 Schematic diagram of the internal structure of the magnetic adsorption mechanism of the present invention.

[0023] Figure: 1. Impact crusher body; 101. Upper housing; 102. Lower housing; 2. Rotor; 201. Main shaft; 202. Turntable; 203. Plate hammer; 204. Impact block; 3. Impact device; 301. Mounting plate; 302. Connecting frame; 303. Positioning shaft; 304. Impact plate; 4. Screw adjustment assembly; 401. Articulated seat; 402. Drive screw; 403. Fixed frame; 5. Feeding device; 501. Feed hopper; 502. Electric cylinder; 503. Fixed Block; 504, sliding bracket; 505, conical protrusion; 506, slide; 507, reciprocating push rod; 508, dividing plate; 509, bottom heating plate; 510, side heating plate; 511, electric heater; 6, dust removal equipment connection assembly; 601, ventilation pipe; 602, protective cover; 603, shielding cover; 604, baffle; 605, flange connecting pipe; 7, flange connecting pipe; 701, controller; 702, electromagnetic generator; 703, built-in coil; 704, iron core. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1 For an embodiment of the present invention, please refer to Figures 1 to 4 A limestone crushing device for cement clinker production includes an impact crusher body 1, a rotor 2, an impact device 3, and a screw adjustment assembly 4. The impact crusher body 1 consists of an upper shell 101 and a lower shell 102. The upper shell 101 and the lower shell 102 are hinged and rotatable. The rotor 2 is arranged between the upper shell 101 and the lower shell 102. A shaft seat is installed on the outer side of the lower shell 102. The rotor 2 is installed on the shaft seat. The rotor 2 consists of a main shaft 201, a rotating disk 202, a plate hammer 203, and a striking block 204. The impact device Two groups are installed inside the upper shell 101, and one group is installed inside the lower shell 102. The impact device 3 consists of a mounting plate 301, a connecting frame 302, a positioning shaft 303, and an impact plate 304. The end of the screw adjustment assembly 4 is connected to the back of the impact device 3. The screw adjustment assembly 4 consists of an articulated seat 401 hinged to the connecting frame 302, a transmission screw 402 connected to the articulated seat 401, and a fixed frame 403 threadedly connected to the transmission screw 402. The fixed frame 403 is installed on the outer wall of the impact crusher body 1.

[0026] The main shaft 201 is rotatably connected to the shaft seat, and a transmission pulley is installed at the input end of the main shaft 201, which is in transmission connection with the external power input device. The turntable 202 is installed on the main shaft 201, and the plate hammer 203 is arranged in multiple and evenly installed on the outer edge of the turntable 202. The striking block 204 is installed at the edge of the plate hammer 203 by bolts, and the material of the striking block 204 is a high-hardness alloy.

[0027] The positioning shaft 303 is installed on the inner wall of the impact crusher body 1, the connecting frame 302 is rotatably connected to the positioning shaft 303, a plurality of mounting plates 301 are provided and mounted on the connecting frame 302, and the impact plates 304 are evenly mounted on the surface of the mounting plates 301.

[0028] Working process: Material is fed into the interior of the impact crusher body 1 through the feed port on the upper shell 101, and the rotor 2 is powered by an external power device (the commonly used power device is generally a three-phase motor with a reduction box and a belt drive to drive the drive pulley at the end of the rotor 2 to rotate). During the rotation of the rotor 2, the plate hammer 203 and the impact block 204 installed on the turntable 202 of the rotor 2 are driven to rotate, driving the limestone to be squeezed and crushed between the impact plate 304 and the plate hammer 203 on the impact device 3, and the flying stones can be crushed by colliding with the impact plate 304, and fall back onto the rotor 2 for further squeezing and crushing. After multiple impact crushing and squeezing crushing, the limestone becomes small particles with uniform particle size. When the particle size is smaller than the distance between the plate hammer 203 and the impact plate 304, the crushed limestone is discharged from the impact crusher body 1.

[0029] When the crushed particle size needs to be adjusted, the transmission screw 402 on the screw adjustment assembly 4 is rotated to push the articulated seat 401, so that the connecting frame 302 rotates around the positioning axis 303, driving the impact device 3 to rotate, and then adjusting the distance between the plate hammer 203 and the impact plate 304, thereby adjusting the degree of crushing of the limestone.

[0030] Example 2 As an embodiment of the present invention, please refer to Figures 5 to 7A limestone crushing device for cement clinker production, based on Example 1, further includes a feeding device 5 arranged at the feeding port of the upper shell 101, the feeding device 5 is composed of a feeding hopper 501, an electric cylinder 502, a fixed block 503, a sliding block 504, a reciprocating push rod 507 and a material dividing plate 508. The feeding hopper 501 is installed at the feeding port of the upper shell 101, the electric cylinder 502 is installed on the top of the feeding hopper 501, the output end of the electric cylinder 502 is arranged inside the feeding hopper 501, and the fixed block 503 is arranged on the electric cylinder 502. On the output end, the top and side surfaces of the sliding block 504 are provided with slide grooves 506, the fixed block 503 is slidingly connected to the slide groove 506 on the top surface of the sliding block 504, the reciprocating push rod 507 is installed on the outer wall of the feed hopper 501, and the output end of the reciprocating push rod 507 is slidingly connected to the side surface of the sliding block 504 with a slide groove 506, a plurality of groups of conical protrusions 505 are provided on the front of the sliding block 504, the dividing plate 508 is conically arranged, and is arranged on the inner bottom surface of the feed hopper 501, and the dividing plate 508 is arranged on the rear side of the sliding block 504.

[0031] A bottom heating plate 509 is installed at the bottom of the feed hopper 501, a side heating plate 510 is installed on the back of the distribution plate 508, and an electric heater 511 is provided at the bottom of the feed hopper 501. The electric heater 511 is electrically connected to the bottom heating plate 509 and the side heating plate 510 through wires.

[0032] Working process: When limestone is added, the sliding frame 504 can be driven by the electric cylinder 502 to adjust the height and the feed amount. The conical protrusion 505 on the sliding frame 504 can prevent the limestone from causing large impact marks on the surface of the sliding frame 504, thereby improving the strength and service life of the sliding frame 504. In addition, the sliding frame 504 can be quickly moved left and right by the reciprocating push rod 507, and the conical protrusion 505 can prevent the limestone from being blocked at the feed hopper 501. After passing through the feed hopper 501, the limestone can be evenly distributed through the dividing plate 508, so that the limestone can evenly enter the interior of the impact crusher body 1. In addition, when feeding, the bottom heating plate 509 at the bottom of the feed hopper 501 and the side heating plate 510 arranged on the rear side of the dividing plate 508 can be started to heat the limestone entering the feed hopper 501.

[0033] Effect: The limestone is divided by the sliding baffle 504 and the dividing plate 508, so that the degree of wear of each position of the plate hammer 203 and the impact block 204 is consistent, thereby improving the service life and production efficiency of the plate hammer 203 and the impact block 204, and the limestone is heated to reduce the moisture content inside the limestone, which can facilitate crushing and prevent adhesion between the crushed stones after crushing.

[0034] Example 3 As an embodiment of the present invention, please refer to Figure 3 and Figure 8 Since limestone produces a large amount of dust when it is crushed, general limestone crushing equipment needs to install a bag dust collector to treat the dust-containing exhaust gas inside. When treating the dust-containing exhaust gas, it is generally necessary to connect the bag dust collector to the fan, and use the fan to suck out the dust-containing exhaust gas inside the impact crusher. Due to the splashing of limestone particles inside the impact crusher, it is easy to be sucked into the fan by the airflow, and the limestone particles have a great impact on the fan, ventilation duct and bag dust collector, increasing the failure rate of the fan, ventilation duct and bag dust collector and reducing the service life. Therefore, a limestone crushing device for cement clinker production is provided. On the basis of Example 1, it also includes a dust removal device connecting assembly 6 installed on the top of the upper shell 101. The dust removal device connecting assembly 6 consists of a vent pipe 601 arranged on the top of the upper shell 101, a protective cover 602 installed at the bottom of the vent pipe 601, and a flange connecting pipe 605 installed on the top of the vent pipe 601. A shielding cover 603 is arranged inside the protective cover 602. The shielding cover 603 is conical. A curved flange is arranged on the outer wall of the shielding cover 603, and the bending direction of the curved flange is away from the shielding cover 603. A baffle 604 is installed on the inner wall of the vent pipe 601. The baffle 604 is arranged on the outside of the shielding cover 603, and an annular flange is provided on the baffle 604. The annular flange is arranged above the curved flange, and a gap is present between the annular flange and the curved flange.

[0035] Working process: Install the air inlet pipe of the external bag dust removal equipment (the specific structure is the existing common bag dust collector, fan and connecting pipe, which is a commonly used environmental protection dust removal equipment in building materials production and will not be described in detail here) on the flange connection pipe 605. When dust removal is carried out, the fan sucks away the dust-containing exhaust gas inside the impact crusher body 1 through the ventilation pipe 601. Since the limestone collides and crushes with the impact plate 304 inside the impact crusher body 1, some fine gravel particles will be splashed, and These gravel particles are affected by the flow of air, and some of them will flow into the ventilation pipe 601. At this time, these gravel particles will first be filtered by the protective cover 602 to prevent the gravel particles from damaging the ventilation pipe 601. In addition, some remaining smaller gravel particles will enter the ventilation pipe 601. When passing through the shielding cover 603 and the baffle 604, the gravel particles in the airflow will be further filtered by the shielding cover and the baffle 604. Finally, the dust-containing exhaust gas with the gravel particles removed will be introduced into the external bag dust collector through the fan for dust removal.

[0036] Effect: The dust removal equipment connecting component 6 can filter the flying gravel particles, preventing the gravel particles from directly entering the fan and the bag-type dust collector through the pipeline, thereby affecting the service life of the fan and the bag-type dust collector.

[0037] Example 4 As an embodiment of the present invention, please refer to Figures 9 to 11 Since there are generally iron impurities inside limestone, the iron impurities will affect the service life of the plate hammer 203 and the impact plate 304 during crushing. Therefore, a limestone crushing device for cement clinker production is provided. On the basis of Example 1, it also includes a magnetic adsorption mechanism 7 installed on the impact device 3 located inside the lower shell 102. The magnetic adsorption mechanism 7 is composed of a controller 701 and an electromagnetic generator 702. The controller 701 and the electromagnetic generator 702 are installed on the lowest mounting plate 301 inside the impact device 3 located inside the lower shell 102. The controller 701 is arranged on the back side of the mounting plate 301, and the electromagnetic generator 702 is arranged on the front side of the mounting plate 301. The electromagnetic generator 702 is conductively connected to the controller 701. A built-in coil 703 and an iron core 704 are arranged inside the electromagnetic generator 702, and the impact plate 304 is installed above the electromagnetic generator 702.

[0038] Working process: During the limestone crushing process, the magnetic adsorption mechanism 7 is activated to energize the built-in coil 703 inside the electromagnetic generator 702. Since the built-in coil 703 is wound around the iron core 704, the electromagnetic generator 702 becomes an electromagnet, which can adsorb the iron impurities in the crushed particles onto the impact plate 304 through magnetism, preventing the iron impurities from causing collisions with the impact plate 304 and the plate hammer 203, thereby improving the service life of the impact plate 304 and the plate hammer 203.

[0039] In summary, the method for crushing limestone using the limestone crushing device for cement clinker production is as follows: Step 1: Generally, limestone is transported to the feeding device 5 by a conveyor. The feeding amount of the feeding device 5 can be adjusted according to the unit feeding amount. By starting the electric cylinder 502, the electric cylinder 502 drives the sliding block 504 to move. The height of the sliding block 504 can be adjusted to adjust the feeding amount. The bottom heating plate 509 and the side heating plate 510 are turned on by the electric heater 511. When the coarsely crushed limestone is put into the inside of the feed hopper 501, the limestone is first heated by the bottom heating plate 509 to remove the moisture inside it. The limestone is evaporated and then enters the sliding baffle 504. By starting the reciprocating push rod 507, the reciprocating push rod 507 drives the reciprocating push rod 507 to move left and right, so that the conical protrusion 505 on the sliding baffle 504 drives the limestone to vibrate, so that the limestone passes through the sliding baffle 504 in an orderly manner and is spread flat on the bottom surface of the feed hopper 501. Then the limestone passes through the dividing plate 508 and is heated again by the side heating plate 510 to further reduce the moisture content and evenly divide the limestone into multiple small piles and enter the interior of the impact crusher body 1.

[0040] Step 2: The limestone entering the impact crusher body 1 falls on the rotor 2, and the rotor 2 is driven to rotate by an external power device (a three-phase motor is driven by a reducer and a pulley), so that the plate hammer 203 on the rotor 2 rotates the limestone, so that the limestone is squeezed and crushed with the plate hammer 203 and the impact plate 304, and the crushed limestone splashes onto the impact plate 304 of the impact device 3 and then rebounds onto the rotor 2, and is crushed by impact. After three such crushing processes, the large pieces of limestone are broken into smaller pieces of limestone. When the particle size of the limestone is smaller than the gap between the impact plate 304 and the plate hammer 203 on the bottom impact device 3, the limestone particles can be discharged from the impact crusher body 1.

[0041] Step 3. Since a large amount of dust will be generated during crushing, a dust removal device is generally installed on the top of the impact crusher body 1, which is generally a bag dust removal device. The bag dust removal device generally uses a fan to draw the dust-laden exhaust gas into the bag dust collector. After being filtered by the dust removal bag, the dust has a dust removal effect of more than 90%. Therefore, during crushing, the dust-laden exhaust gas inside the impact crusher body 1 is introduced into the bag dust collector through the ventilation pipe 601 and the external ventilation duct through the fan. When the dust-laden exhaust gas passes through the dust removal equipment connecting component 6, it will first be partially blocked by the protective cover 602, and then filtered again by the shielding cover 603 and the baffle 604, and then enter the fan and bag dust collector, thereby improving the service life of the dust removal equipment.

[0042] Step 4. Since there are generally metal impurities inside limestone, and iron impurities are generally the largest number of impurities, the magnetic adsorption mechanism 7 is turned on during crushing, and then the magnetic adsorption mechanism 7 is used to adsorb the iron impurities after the final small particle crushing, so that the iron impurities adhere to the impact plate 304 to prevent the wear between the hammer 203 and the impact plate 304 from increasing. When all the limestone is crushed, or when the machine is shut down for maintenance, the magnetic adsorption mechanism 7 can be turned off to discharge the iron impurities from the impact crusher body 1.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A limestone crushing device for cement clinker production, comprising an impact crusher body (1), a rotor (2), an impact device (3), a screw adjustment assembly (4) and a feeding device (5), characterized in that: The impact crusher body (1) is composed of an upper shell (101) and a lower shell (102). The upper shell (101) and the lower shell (102) are hinged and rotated. The rotor (2) is arranged between the upper shell (101) and the lower shell (102). The outer side of the lower shell (102) is equipped with a shaft seat, and the rotor (2) is installed on the shaft seat. The rotor (2) is composed of a main shaft (201), a rotating disk (202), a plate hammer (203) and a striking block (204). Two groups of impact devices (3) are installed inside the upper shell (101) and one group is installed inside the lower shell (102). The impact device (3) is composed of a mounting plate (301), a connecting frame (302), a positioning shaft (303) and an impact plate (304); the end of the screw adjustment assembly (4) is connected to the back of the impact device (3); the screw adjustment assembly (4) is composed of an articulated seat (401) articulated with the connecting frame (302), a transmission screw (402) connected to the articulated seat (401) and a fixed frame (403) threadedly connected to the transmission screw (402); the fixed frame (403) is installed on the outer wall of the impact crusher body (1); and the feeding device (5) is installed on the feeding port of the upper shell (101); A dust removal device connection assembly (6) is provided on the top of the upper shell (101), and a magnetic adsorption mechanism (7) is installed on the counterattack device (3) located inside the lower shell (102).

2. The limestone crushing device for cement clinker production according to claim 1, characterized in that: The main shaft (201) is rotatably connected to the shaft seat, the input end of the main shaft (201) is equipped with a transmission pulley, and the transmission pulley is transmission-connected to the external power input device, the turntable (202) is mounted on the main shaft (201), a plurality of plate hammers (203) are evenly mounted on the outer edge of the turntable (202), and a striking block (204) is mounted on the edge of the plate hammer (203) by means of bolts, and the striking block (204) is made of a high-hardness alloy.

3. The limestone crushing device for cement clinker production according to claim 1, characterized in that: The positioning shaft (303) is mounted on the inner wall of the impact crusher body (1); the connecting frame (302) is rotatably connected to the positioning shaft (303); a plurality of mounting plates (301) are provided and mounted on the connecting frame (302); and the impact plates (304) are evenly mounted on the surface of the mounting plates (301).

4. The limestone crushing device for cement clinker production according to claim 1, characterized in that: The feeding device (5) is composed of a feeding hopper (501), an electric cylinder (502), a fixed block (503), a sliding block (504), a reciprocating push rod (507) and a material dividing plate (508). The feeding hopper (501) is installed at the feeding port of the upper shell (101), the electric cylinder (502) is installed on the top of the feeding hopper (501), the output end of the electric cylinder (502) is set inside the feeding hopper (501), and the fixed block (503) is set on the output end of the electric cylinder (502). The top surface and side surface of the sliding block (504) are provided with The slide groove (506) is slidably connected to the slide groove (506) on the top surface of the fixed block (503) and the sliding block (504); the reciprocating push rod (507) is installed on the outer wall of the feed hopper (501); the output end of the reciprocating push rod (507) is slidably connected to the slide groove (506) on the side of the sliding block (504); a plurality of groups of conical protrusions (505) are provided on the front of the sliding block (504); the dividing plate (508) is conically arranged and is arranged on the inner bottom surface of the feed hopper (501); and the dividing plate (508) is arranged on the rear side of the sliding block (504).

5. The limestone crushing device for cement clinker production according to claim 4, characterized in that: A bottom heating plate (509) is installed at the bottom of the feed hopper (501), a side heating plate (510) is installed on the back of the distribution plate (508), and an electric heater (511) is provided at the bottom of the feed hopper (501). The electric heater (511) is electrically connected to the bottom heating plate (509) and the side heating plate (510) through wires.

6. The limestone crushing device for cement clinker production according to claim 1, characterized in that: The dust removal equipment connection assembly (6) consists of a vent pipe (601) arranged at the top of the upper shell (101), a protective cover (602) installed at the bottom of the vent pipe (601), and a flange connection pipe (605) installed at the top of the vent pipe (601). A shielding cover (603) is arranged inside the protective cover (602). The shielding cover (603) is conical. A curved flange is arranged on the outer wall of the shielding cover (603), and the curved flange is bent in a direction away from the shielding cover (603). A baffle (604) is installed on the inner wall of the vent pipe (601). The baffle (604) is arranged on the outside of the shielding cover (603), and an annular flange is arranged on the baffle (604). The annular flange is arranged above the curved flange, and a gap exists between the annular flange and the curved flange.

7. The limestone crushing device for cement clinker production according to claim 1, characterized in that: The magnetic adsorption mechanism (7) is composed of a controller (701) and an electromagnetic generator (702). The controller (701) and the electromagnetic generator (702) are mounted on a mounting plate (301) at the lower end of the counterattack device (3) located inside the lower shell (102). The controller (701) is arranged on the back side of the mounting plate (301), and the electromagnetic generator (702) is arranged on the front side of the mounting plate (301). The electromagnetic generator (702) is conductively connected to the controller (701). A built-in coil (703) and an iron core (704) are arranged inside the electromagnetic generator (702). The counterattack plate (304) is mounted above the electromagnetic generator (702).

8. A method for crushing limestone for cement clinker production, characterized in that: Using the limestone crushing device for cement clinker production according to claim 1, The following steps are involved: S1: Feeding: The coarsely crushed limestone is fed into the interior of the impact crusher body (1) through the feeding device (5). When feeding, the feeding device (5) can evenly distribute the limestone so that the wear degree of different positions of the rotor (2) is consistent; S2: Crushing: The equally divided limestone is crushed by passing it through the plate hammer (203) and the striking block (204) on the rotor (2) and the impact plate (304) on the impact device (3). The distance between the impact plate (304) and the plate hammer (203) can be adjusted by the screw adjustment assembly (4), thereby adjusting the particle size of the crushed limestone. S3: Dust removal: The dust removal device connecting assembly (6) can be connected to an external bag dust collector and a fan, and the dust-laden flue gas generated by the crushing of limestone inside the impact crusher body (1) is extracted by the fan and introduced into the bag dust collector for dry dust removal; when the dust-laden flue gas is extracted, the dust removal device connecting assembly (6) is used to filter out larger particles splashed by the crushing and collision in the dust-laden flue gas, thereby preventing the larger particles from entering the fan or the bag dust collector; S4: Iron removal: Limestone generally contains metallic impurities, and iron impurities are generally the largest impurities. During crushing, the magnetic adsorption mechanism (7) is turned on, and then the magnetic adsorption mechanism (7) adsorbs the iron impurities after the final small particle crushing, so that the iron impurities adhere to the impact plate (304), thereby preventing the wear between the hammer (203) and the impact plate (304) from increasing; S5: Discharging: The crushed limestone particles are discharged from the bottom of the impact crusher body (1). When all the limestone particles are discharged, the magnetic adsorption mechanism (7) is closed to discharge the iron material.

Images