A method for producing ultrafine heavy calcium carbonate

Abstract

The present invention discloses a method for producing ultrafine heavy calcium carbonate, S1, feeding: placing limestone stones of uniform size after pretreatment inside a storage box in a crushing and grinding mechanism, and using a cylinder in a screening and discharging mechanism to feed at intervals; S2, raw material crushing: the stones enter the crushing trough and are crushed by a crushing roller, and the present invention relates to the technical field of calcium carbonate production. The method for producing ultrafine heavy calcium carbonate combines the crushing and grinding mechanism and the screening and discharging mechanism, and the two mechanisms can crush and grind the raw materials respectively during operation, and in this process, the stirring and vibration of the stirring plate can be used to accelerate the screening efficiency, and when the material is subsequently fed, the screening and discharging mechanism can be driven by the cylinder to move the entire mechanism out of the device box, and the residual raw materials inside can be discharged, so that the staff can collect and reuse them conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of calcium carbonate production, in particular to a method for producing ultrafine heavy calcium carbonate. Background Art

[0002] Heavy calcium carbonate, referred to as heavy calcium carbonate, is made by grinding natural carbonate minerals such as calcite, marble, and limestone. It is a commonly used powdered inorganic filler with the advantages of high chemical purity, high inertness, not easy to react chemically and good thermal stability. The existing heavy calcium carbonate production equipment is expensive and has a single function, that is, the crushing and grinding of the raw materials need to be carried out separately using different machines, which is inefficient. Patent documents have been made to improve this.

[0003] For example, Chinese patent CN210207013U discloses a multifunctional ultrafine heavy calcium carbonate production equipment, comprising two mutually parallel screening boxes, a grinding box being tightly welded on the top surface of the lower screening box, and a crushing box being tightly welded on the top surface of the upper screening box; the multifunctional ultrafine heavy calcium carbonate production equipment has the functions of crushing ore raw materials and grinding by means of the crushing box and the grinding box, thus avoiding the problem of single production function of traditional ultrafine heavy calcium carbonate production equipment, and at the same time, the motor, the driving wheel and the driven wheel are provided, so that the crushing rollers and the grinding rollers in the crushing box and the grinding box can be driven by the same motor, which not only improves the production efficiency, but also greatly saves the cost, thus solving the problem of single function of existing heavy calcium carbonate production equipment.

[0004] Although the equipment in the above documents can crush and screen the raw materials, it still has obvious defects in actual use, such as: After the raw materials are crushed and ground, the equipment needs to screen them twice through the screen, but the unqualified raw materials on the top of the screen cannot be removed in time, which easily causes the screen to be blocked. If the screen is frequently disassembled and cleaned, it not only increases the fatigue of the staff, but also affects the production efficiency. Therefore, an ultrafine heavy calcium carbonate production equipment capable of timely discharging unqualified raw materials is now designed to solve such defects. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for producing ultrafine heavy calcium carbonate, which solves the problem that the existing equipment is prone to clogging the screen and is cumbersome to disassemble.

[0006] To achieve the above objectives, the present invention is implemented by the following technical scheme: a method for producing ultrafine heavy calcium carbonate, specifically comprising the following steps: S1. Feeding: Place the limestone of uniform size after pretreatment in the storage box of the crushing and grinding mechanism, and use the cylinder in the screening and discharging mechanism to feed the material at intervals; S2, raw material crushing: the stone enters the crushing tank and is crushed by the crushing roller; S3, primary screening: the crushed stones enter the second screening cylinder and are stirred and screened using a stirring plate; S4, raw material grinding: the sieved stones fall into the grinding trough and are ground into powder by the grinding roller; S5, secondary screening: the powder enters the first screening cylinder and is screened again, and the qualified calcium carbonate powder is discharged through the discharge port; S6. Discharge of crushed materials: Start the cylinder to push the entire screening and discharging mechanism to the left, and use the discharging circular plate to discharge the internal crushed materials on the top of the guide frame to facilitate subsequent reprocessing.

[0007] Preferably, the crushing and grinding mechanism comprises a device box, and a screening and discharging mechanism is installed inside the device box.

[0008] Preferably, a crushing slot, a first sieve slot, a grinding slot and a second sieve slot are sequentially provided inside the device box from top to bottom, and discharge ports are provided at the top and bottom of the inner cavities of the first sieve slot and the second sieve slot, and the front and rear parts of the left sides of the inner cavities of the crushing slot and the grinding slot are respectively rotatably connected with the first rotating rod and the second rotating rod through bearing parts, and the right ends of the first rotating rod and the second rotating rod penetrate the device box and extend to the right side of the device box, and the surfaces of the two first rotating rods are fixedly connected with mutually meshing toothed discs, and the right side of the device box is fixedly connected with a motor through a bracket, and the output shaft of the motor is fixedly connected to the right end of the rear first rotating rod through a coupling.

[0009] Preferably, the first rotating rod and the second rotating rod are connected via a first pulley and a first belt transmission, the upper and lower parts of the right side of the device box are rotatably connected with inner-angle rotating cylinders through openings, the two inner-angle rotating cylinders are respectively connected to the first sieve slot and the second sieve slot, and the two inner-angle rotating cylinders are respectively connected to the adjacent first rotating rod and the second rotating rod via a second pulley and a second belt transmission.

[0010] Preferably, the top of the device box is fixedly connected to a feeding hopper used in conjunction with the crushing trough through an opening, the right side of the top of the device box is fixedly connected to a material storage box through a bracket, the top of the device box and below the material storage box is fixedly connected to a lower sealing plate through a bracket, the top of the lower sealing plate is provided with a material holding frame used in conjunction with the material storage box, the right part of the inner side of the material holding frame is fixedly connected to a curved sealing seat, and the rear part of the material holding frame is fixedly connected to an inner groove pull plate through a fixing plate.

[0011] Preferably, a material guide frame is fixedly connected to the left side of the device box via a bracket, and two material guide frames are provided, which are respectively located below the first sieve slot and the second sieve slot.

[0012] Preferably, the screening and discharging mechanism includes a first screening cylinder and a second screening cylinder, the first screening cylinder and the second screening cylinder are respectively located on the inner sides of the first screening slot and the second screening slot, a screening slot is provided on the left side of the first screening cylinder and the second screening cylinder, a feed port is provided on the top of the inner cavity of the screening slot, and a linkage slot is provided on the right side of the first screening cylinder and the second screening cylinder.

[0013] Preferably, the right sides of the first screening drum and the second screening drum are both provided with a transverse tie rod through an opening, and the left end of the transverse tie rod passes through the linkage groove and the screening groove and extends to the left side of the first screening drum, the left side of the surface of the transverse tie rod is rotatably connected with a circular sealing plate used in conjunction with the screening groove, the surface of the transverse tie rod and the inner side of the screening groove are rotatably connected with a discharge circular plate, the surface of the transverse tie rod and the inner side of the screening groove are fixedly connected with a stirring plate, and a plurality of stirring plates are provided, and the surface of the stirring plate is provided with a pushing block.

[0014] Preferably, a sliding ring is sleeved on the surface of the transverse tie rod and located on the left side of the circular sealing plate, the rear parts of the two sliding rings are fixedly connected to a sliding rod frame through a bracket, and the top end of the sliding rod frame is slidably connected to the inner side of the inner groove pull plate, the rear part of the device box is fixedly connected to a cylinder through a bracket, and the left end of the cylinder is fixedly connected to the sliding rod frame, the surface of the transverse tie rod and located between the sliding ring and the circular sealing plate is sleeved with a first spring, the right end of the transverse tie rod is fixedly connected to a polygonal plug rod, and the right end of the polygonal plug rod extends to the inner side of the inner angle rotating cylinder.

[0015] Preferably, a first arc ball is fixedly connected to the edge of the right side of the inner cavity of the linkage groove, a top pressure plate is fixedly connected to the surface of the transverse tie rod and located on the inner side of the linkage groove, a second arc ball used in conjunction with the first arc ball is fixedly connected to the right side of the top pressure plate, a second spring is fixedly connected between the top pressure plate and the left side of the inner cavity of the linkage groove, and a retreat block is fixedly connected to the top of the first screening cylinder and the second screening cylinder.

[0016] Beneficial Effects The present invention provides a method for producing ultrafine heavy calcium carbonate. Compared with the existing technology, it has the following beneficial effects: (1) The method for producing ultrafine heavy calcium carbonate comprises the following steps: using a crushing and grinding mechanism and a screening and discharging mechanism in combination; the two mechanisms can crush and grind the raw materials respectively during operation; and in this process, the stirring and vibration of the stirring plate can be used to accelerate the screening efficiency; and during subsequent feeding, the screening and discharging mechanism can be driven by the cylinder to move the entire mechanism out of the device box, and the residual raw materials inside can be discharged, so that the staff can collect and reuse them conveniently; the whole process does not require the staff to operate, which is not only convenient to use but also improves the efficiency of the equipment.

[0017] (2) The method for producing ultrafine heavy calcium carbonate comprises the following steps: a first screening drum and a second screening drum are provided with linkage grooves, a top pressure plate is installed on the surface of a horizontal tie rod, and the second arc ball, the first arc ball, a stirring plate and a pushing block are used together. The arrangement of these structures can utilize the second arc ball and the first arc ball to abut against each other when the horizontal tie rod rotates so that the stirring plate stirs the raw materials and the pushing block can also be used to vibrate the raw materials, thereby accelerating the screening of the raw materials, avoiding blockage of the screening drum and improving the overall efficiency.

[0018] (3) The method for producing ultrafine heavy calcium carbonate comprises the following steps: installing an inner angle rotating drum used in conjunction with a multi-angle plug rod on the right side of the device box, and using the drum in conjunction with a circular sealing plate and a discharge circular plate. The arrangement of these structures enables the first screening drum and the second screening drum to be drawn out from the interior of the device box when the cylinder pushes the slide rod frame, and finally the internal raw materials are scraped out by the discharge circular plate, so as to facilitate subsequent collection and reuse. After resetting, the multi-angle plug rod can be used to re-dock with the inner angle rotating drum to resume power operation, thereby ensuring that unqualified raw materials can be discharged regularly to avoid blockage, and also reducing the workload of the staff.

[0019] (4) The method for producing ultrafine heavy calcium carbonate is to provide a curved sealing seat on the inner side of the material holding frame and use it in combination with an inner groove pull plate. The arrangement of these structures can first utilize the docking of the inner groove pull plate with the slide bar frame to move the slide bar frame a certain distance before pulling the material holding frame, thereby preventing the raw material from falling into the first sieve slot after being crushed. At the same time, the curved sealing seat can push up the raw material and block it to prevent the raw material from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a rear view of the structure of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A; Figure 5It is a cross-sectional view of the device box structure of the present invention; Figure 6 It is a schematic diagram of the internal structure of the device box of the present invention; Figure 7 It is a cross-sectional view of the material holding frame, the arc surface sealing seat and the inner groove pulling plate structure of the present invention; Figure 8 It is a schematic diagram of the structure of the crushing roller, the grinding roller and the toothed disc of the present invention; Fig. 9 It is a schematic diagram of the screening and discharging mechanism structure of the present invention; Fig.10 For the present invention Fig. 9 A partial enlarged view of point B in the middle; Fig.11 is a cross-sectional view of the first screening drum structure of the present invention; Fig.12 It is a schematic diagram of the top pressure plate, the second arc ball and the second spring structure of the present invention; Fig.13 is a cross-sectional view of the second screening drum structure of the present invention; Fig.14 It is a schematic diagram of the lower sealing plate structure of the present invention.

[0021] In the figure: 1. Crushing and grinding mechanism; 2. Screening and discharging mechanism; 101. Device box; 102. Crushing slot; 103. First screening slot; 104. Grinding slot; 105. Second screening slot; 106. Feeding port; 107. First rotating rod; 108. Second rotating rod; 109. Crushing roller; 110. Grinding roller; 111. Toothed toothed disc; 112. Motor; 113. First pulley; 114. First belt; 115. Inner angle rotating drum; 116. Second pulley; 117. Second belt; 118. Feeding hopper; 119. Storage box; 120. Lower sealing plate; 121. Material holding frame ; 122, arc surface sealing seat; 123, inner groove pull plate; 124, material guide frame; 201, first screening cylinder; 202, second screening cylinder; 203, feed inlet; 204, horizontal tie rod; 205, circular sealing plate; 206, discharge circular plate; 207, stirring plate; 208, push block; 209, sliding ring; 210, first spring; 211, sliding rod frame; 212, linkage groove; 213, first arc ball; 214, top pressure plate; 215, second arc ball; 216, second spring; 217, retraction block; 218, multi-angle plug rod; 219, cylinder; 220, screening trough. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-14 The present invention provides a technical solution: a method for producing ultrafine heavy calcium carbonate, which specifically comprises the following steps: S1, feeding: placing limestone stones of uniform size after pretreatment in the storage box 119 in the crushing and grinding mechanism 1, and using the cylinder 219 in the screening and discharging mechanism 2 for intermittent feeding; S2, raw material crushing: the stones enter the crushing tank 102 and are crushed by the crushing roller 109; S3, primary screening: the crushed stones enter the second screening cylinder 202 and are stirred and screened using the stirring plate 207; S4, raw material grinding: the sieved stones fall into the grinding trough 104 and are ground into powder by the grinding roller 110; S5, secondary screening: the powder enters the first screening cylinder 201 and is screened again, and the qualified calcium carbonate powder is discharged through the discharge port 106; S6. Discharging of crushed materials: Start the cylinder 219 to push the entire screening and discharging mechanism 2 to the left, and use the discharging circular plate 206 to discharge the crushed materials inside to the top of the guide frame 124, so as to facilitate subsequent reprocessing.

[0024] The above-mentioned method for producing ultrafine heavy calcium carbonate comprises the following more specific steps: S1, feeding: the limestone of uniform size after pretreatment is placed inside the material frame 121, and then the limestone rolls into the inside of the material frame 121 to fill it up, and at the same time the lower sealing plate 120 seals the bottom of the material frame 121 to prevent the limestone from falling, and then the cylinder 219 is started to push the slide bar frame 211 forward a distance, and finally pushes the inner wall of the inner groove pull plate 123 to push the inner groove pull plate 123 and the material frame 121 to move left, At this time, the lower sealing plate 120 no longer blocks the limestone inside the material frame 121 from falling into the inner side of the crushing tank 102 through the feeding hopper 118. At the same time, the arc surface sealing seat 122 uses the arc of its top to push the limestone at the opening of the storage box 119 back to the storage box 119 and seal it to prevent the stone from falling. After the feeding is completed, the cylinder 219 pulls the inner groove pull plate 123 and the material frame 121 to move right and reset to re-dock with the storage box 119 and load the material; S2, raw material crushing: start the motor 112, the motor 112 drives the first rotating rod 107 to rotate, at this time, due to the meshing of the two toothed discs 111, the first rotating rod 107, the second rotating rod 108 and the inner angle rotating drum 115 are all rotated through the second pulley 116, the second belt 117, the first pulley 113 and the first belt 114. When the first rotating rod 107 rotates, it drives the two crushing rollers 109 to rotate to crush the limestone, and the limestone falls into the second screening drum 202 through the discharge port 106 and the feed port 203; S3, primary screening: when the inner angle rotating drum 115 rotates, the internal multi-angle insert rod 218 will be used to drive the horizontal tie rod 204 and the top pressure plate 214 and the stirring plate 207 on its surface to rotate. The rotation of the top pressure plate 214 will cause the second arc ball 215 on one side to continuously collide with the first arc ball 213 and cooperate with the elastic force of the second spring 216, thereby driving the horizontal tie rod 204 and the stirring plate 207 to stir and vibrate back and forth inside the screening trough 220, so that qualified raw material fragments are screened out through the screening trough 220 and fall into the grinding trough 104 through the discharge port 106, while unqualified fragments remain in the second screening drum 202; S4, raw material grinding: the broken pieces falling into the grinding tank 104 are ground by the grinding roller 110, and finally become powder and fall into the first screening cylinder 201 through the discharge port 106; S5, secondary screening: after the powder enters the first screening drum 201, the inner angle rotating drum 115 will use the internal multi-angle plug rod 218 to drive the horizontal tie rod 204 and the top pressure plate 214 and the stirring plate 207 on its surface to rotate. The rotation of the top pressure plate 214 will cause the second arc ball 215 on one side to continuously collide with the first arc ball 213 and cooperate with the elastic force of the second spring 216, thereby driving the horizontal tie rod 204 and the stirring plate 207 to stir and vibrate back and forth inside the screening trough 220, and the qualified powder is screened out through the screening trough 220 and discharged from the device box 101 through the bottom discharge port 106, while the unqualified powder particles remain in the first screening drum 201; S6, crushed material discharge: when step S1 is running, step S6 also runs synchronously. When the cylinder 219 pushes the slide bar frame 211, it will pull the cross tie rod 204 through the two sliding rings 209. Since the elastic force of the second spring 216 pushes the top pressure plate 214 to the right, the entire first screening drum 201 and the second screening drum 202 will move to the left together. After the screening trough 220 completely moves out of the first screening trough 103 and the second screening trough 105, the first screening drum 201 and the second screening drum 202 will block the discharge port 106 to prevent the raw materials from entering the first screening trough 103 and the second screening trough 105. At the same time, the retraction block 217 will resist the left side of the inner cavity of the first screening trough 103 and the second screening trough 105 to prevent the first screening drum 201 and the second screening drum 202 from continuing to move to the left. At this time, the cylinder 219 continues to push to make the slide bar frame 211 resist the left wall on the inner side of the inner trough pull plate 123 and drive The material holding frame 121 moves to the left. At the same time, since the first screening drum 201 and the second screening drum 202 are limited by the horizontal tie rod 204, they will be driven alone to continue to move to the left. At this time, the circular sealing plate 205 and the discharge circular plate 206 on the surface thereof move to the left together, and the left movement of the top pressure plate 214 will compress the second spring 216. The circular sealing plate 205 moves to the left to open the screening trough 220, and the left movement of the discharge circular plate 206 will scrape out the raw materials inside the first screening drum 201 and the second screening drum 202 and drop them on the surface of the material guide frame 124, which is convenient for subsequent collection and re-crushing and grinding. After the discharge is completed, the cylinder 219 retracts and pushes the horizontal tie rod 204 to drive the circular sealing plate 205 and the discharge circular plate 206 to re-dock with the screening trough 220, and then pushes the first screening drum 201 and the second screening drum 202 back to the inside of the first screening slot 103 and the second screening slot 105, and at the same time, the polygonal insertion rod 218 is reinserted into the inner angle rotating drum 115 to complete the power docking.

[0025] The above-mentioned method for producing ultrafine heavy calcium carbonate is implemented by the following structure: Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8, showing the overall structure of the crushing and grinding mechanism 1, the crushing and grinding mechanism 1 includes a device box 101, the inside of which is installed a screening and discharging mechanism 2, the inside of the device box 101 is provided with a crushing slot 102, a first screening slot 103, a grinding slot 104, and a second screening slot 105 from top to bottom, the top and bottom of the inner cavity of the first screening slot 103 and the second screening slot 105 are provided with a discharge port 106, the front and rear parts of the left sides of the inner cavities of the crushing slot 102 and the grinding slot 104 are respectively rotatably connected to the first rotating rod 107 and the second rotating rod 108 through bearing parts, the first rotating rod The right ends of the first rotating rod 107 and the second rotating rod 108 both penetrate the device box 101 and extend to the right side of the device box 101. The surfaces of the two first rotating rods 107 are fixedly connected with mutually meshing toothed discs 111. The right side of the device box 101 is fixedly connected with a motor 112 through a bracket. The motor 112 is a servo motor. The output shaft of the motor 112 is fixedly connected to the right end of the rear first rotating rod 107 through a coupling. The first rotating rod 107 and the second rotating rod 108 are connected by a first pulley 113 and a first belt 114. The upper and lower parts of the right side of the device box 101 are connected by An opening is provided for rotationally connecting an inner angle rotating drum 115, and the two inner angle rotating drums 115 are respectively connected to the first sieve slot 103 and the second sieve slot 105, and the two inner angle rotating drums 115 are respectively connected to the first rotating rod 107 and the second rotating rod 108 through a second pulley 116 and a second belt 117. A feeding hopper 118 used in conjunction with the crushing slot 102 is fixedly connected to the top of the device box 101 through an opening, and a storage box 119 is fixedly connected to the right side of the top of the device box 101 through a bracket, and the top of the device box 101 is located below the storage box 119. A lower sealing plate 120 is fixedly connected via a bracket. The lower sealing plate 120 is L-shaped and can limit the material holding frame 121 of the material storage box to prevent it from moving to the right during loading. A material holding frame 121 used in conjunction with the material storage box 119 is provided on the top of the lower sealing plate 120. An arc sealing seat 122 is fixedly connected to the right portion of the inner side of the material holding frame 121. An inner groove pull plate 123 is fixedly connected to the rear portion of the material holding frame 121 via a fixed plate. A material guide frame 124 is fixedly connected to the left side of the device box 101 via a bracket, and two material guide frames 124 are provided, which are respectively located below the first sieve slot 103 and the second sieve slot 105.

[0026] Please refer to Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14, showing the overall structure of the screening and discharging mechanism 2, the screening and discharging mechanism 2 includes a first screening drum 201 and a second screening drum 202, the first screening drum 201 and the second screening drum 202 are respectively located on the inner sides of the first screening slot 103 and the second screening slot 105, a screening slot 220 is provided on the left side of the first screening drum 201 and the second screening drum 202, the screening slot 220 inside the first screening drum 201 has a smaller mesh than the screening slot 220 inside the second screening drum 202 and is used to screen powder, a feed inlet 203 is provided on the top of the inner cavity of the screening slot 220, a linkage slot 212 is provided on the right side of the first screening drum 201 and the second screening drum 202, The right side of the screening drum 202 is provided with a transverse tie rod 204 through an opening, and the left end of the transverse tie rod 204 passes through the linkage groove 212 and the screening groove 220 and extends to the left side of the first screening drum 201. The left side of the surface of the transverse tie rod 204 is rotatably connected with a circular sealing plate 205 used in conjunction with the screening groove 220. The two circular sealing plates 205 are respectively located on the inner sides of the first screening drum 201 and the second screening drum 202, and will not be separated from the first screening drum 201 and the second screening drum 202 when the transverse tie rod 204 vibrates left and right. The surface of the transverse tie rod 204 and the inner side of the screening groove 220 are rotatably connected with a discharge circular plate 206. The surface of the transverse tie rod 204 and the screening groove 220 are The inner side of the device box 101 is fixedly connected with a stirring plate 207, and a plurality of stirring plates 207 are provided. A pushing block 208 is provided on the surface of the stirring plate 207. A sliding ring 209 is sleeved on the surface of the horizontal tie rod 204 and located on the left side of the circular sealing plate 205. The rear parts of the two sliding rings 209 are fixedly connected with a sliding rod frame 211 through a bracket, and the top of the sliding rod frame 211 is slidably connected to the inner side of the inner groove pull plate 123. The rear part of the device box 101 is fixedly connected with a cylinder 219 through a bracket, and the left end of the cylinder 219 is fixedly connected to the sliding rod frame 211. The surface of the horizontal tie rod 204 and located between the sliding ring 209 and the circular sealing plate 205 is sleeved with a first spring 210. The right end of the horizontal tie rod 204 A polygonal plug rod 218 is fixedly connected, and the right end of the polygonal plug rod 218 extends to the inner side of the inner corner rotating cylinder 115. A first arc ball 213 is fixedly connected to the edge of the right side of the inner cavity of the linkage groove 212. A top pressure plate 214 is fixedly connected to the surface of the transverse tie rod 204 and located on the inner side of the linkage groove 212. A second arc ball 215 used in conjunction with the first arc ball 213 is fixedly connected to the right side of the top pressure plate 214. The first arc ball 213 and the second arc ball 215 are staggered. A second spring 216 is fixedly connected between the top pressure plate 214 and the left side of the inner cavity of the linkage groove 212. A retreat block 217 is fixedly connected to the top of the first screening cylinder 201 and the second screening cylinder 202.

[0027] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A method for producing ultrafine heavy calcium carbonate, characterized in that: The specific steps include: S1, feeding: placing limestone of uniform size after pretreatment in a storage box (119) in the crushing and grinding mechanism (1), and feeding at intervals using the cylinder (219) in the screening and discharging mechanism (2); S2, raw material crushing: the stones enter the crushing tank (102) and are crushed by the crushing roller (109); S3, primary screening: the crushed stones enter the second screening cylinder (202) and are stirred and screened for the first time using a stirring plate (207); S4, raw material grinding: the sieved stones fall into the grinding trough (104) and are ground into powder by the grinding roller (110); S5, secondary screening: after the powder enters the first screening cylinder (201), it is screened again and the qualified calcium carbonate powder is discharged through the discharge port (106); S6, crushed material discharge: start the cylinder (219) to push the entire screening and discharging mechanism (2) to the left, and use the discharging circular plate (206) to discharge the internal crushed materials on the top of the guide frame (124) to facilitate subsequent reprocessing; The crushing and grinding mechanism (1) comprises a device box (101), and a screening and discharging mechanism (2) is installed inside the device box (101); The top of the device box (101) is fixedly connected to a feeding hopper (118) used in conjunction with the crushing tank (102) through an opening, the right side of the top of the device box (101) is fixedly connected to a material storage box (119) through a bracket, and a lower sealing plate (120) is fixedly connected to the top of the bottom end of the device box (101) and located below the material storage box (119) through a bracket, and a material holding frame (121) used in conjunction with the material storage box (119) is provided on the top of the lower sealing plate (120), and a curved sealing seat (122) is fixedly connected to the right inner side of the material holding frame (121), and an inner groove pull plate (123) is fixedly connected to the rear of the material holding frame (121) through a fixing plate.

2. The method for producing ultrafine heavy calcium carbonate according to claim 1, wherein: The inside of the device box (101) is provided with a crushing slot (102), a first sieve slot (103), a grinding slot (104) and a second sieve slot (105) in sequence from top to bottom; the top and bottom of the inner cavities of the first sieve slot (103) and the second sieve slot (105) are provided with a feed opening (106); the front and rear portions of the left sides of the inner cavities of the crushing slot (102) and the grinding slot (104) are rotatably connected to a first rotating rod (107) and a second rotating rod (108) respectively via bearings; the right ends of the first rotating rod (107) and the second rotating rod (108) penetrate the device box (101) and extend to the right side of the device box (101); the surfaces of the two first rotating rods (107) are fixedly connected to mutually meshing toothed discs (111); the right side of the device box (101) is fixedly connected to a motor (112) via a bracket; the output shaft of the motor (112) is fixedly connected to the right end of the rear first rotating rod (107) via a coupling.

3. The method for producing ultrafine heavy calcium carbonate according to claim 2, wherein: The first rotating rod (107) and the second rotating rod (108) are connected to each other through a first pulley (113) and a first belt (114); the upper and lower parts of the right side of the device box (101) are rotatably connected to inner corner rotating cylinders (115) through openings; the two inner corner rotating cylinders (115) are respectively connected to the first sieve slot (103) and the second sieve slot (105); the two inner corner rotating cylinders (115) are respectively connected to the adjacent first rotating rod (107) and the second rotating rod (108) through a second pulley (116) and a second belt (117).

4. The method for producing ultrafine heavy calcium carbonate according to claim 2, wherein: A material guide frame (124) is fixedly connected to the left side of the device box (101) via a bracket, and two material guide frames (124) are provided, each of which is located below the first sieve slot (103) and the second sieve slot (105).

5. The method for producing ultrafine heavy calcium carbonate according to claim 4, characterized in that: The screening and discharging mechanism (2) comprises a first screening cylinder (201) and a second screening cylinder (202); the first screening cylinder (201) and the second screening cylinder (202) are respectively located on the inner sides of the first screening slot (103) and the second screening slot (105); a screening slot (220) is provided on the left side of the first screening cylinder (201) and the second screening cylinder (202); a feed port (203) is provided on the top of the inner cavity of the screening slot (220); and a linkage slot (212) is provided on the right side of the first screening cylinder (201) and the second screening cylinder (202).

6. The method for producing ultrafine heavy calcium carbonate according to claim 5, characterized in that: The right sides of the first screening drum (201) and the second screening drum (202) are both provided with a transverse tie rod (204) through an opening, and the left end of the transverse tie rod (204) passes through the linkage groove (212) and the screening groove (220) and extends to the left side of the first screening drum (201), the left side of the surface of the transverse tie rod (204) is rotatably connected to a circular sealing plate (205) used in conjunction with the screening groove (220), the surface of the transverse tie rod (204) and located inside the screening groove (220) is rotatably connected to a discharge circular plate (206), the surface of the transverse tie rod (204) and located inside the screening groove (220) is fixedly connected to a stirring plate (207), and a plurality of stirring plates (207) are provided, and the surface of the stirring plate (207) is provided with a pushing block (208).

7. The method for producing ultrafine heavy calcium carbonate according to claim 6, characterized in that: A sliding ring (209) is sleeved on the surface of the transverse tie rod (204) and located on the left side of the circular sealing plate (205); the rear parts of the two sliding rings (209) are fixedly connected to a sliding rod frame (211) via a bracket, and the top end of the sliding rod frame (211) is slidably connected to the inner side of the inner groove pull plate (123); the rear part of the device box (101) is fixedly connected to a cylinder (219) via a bracket, and the left end of the cylinder (219) is fixedly connected to the sliding rod frame (211); a first spring (210) is sleeved on the surface of the transverse tie rod (204) and located between the sliding ring (209) and the circular sealing plate (205); the right end of the transverse tie rod (204) is fixedly connected to a multi-angle plug rod (218), and the right end of the multi-angle plug rod (218) extends to the inner side of the inner angle rotating cylinder (115).

8. The method for producing ultrafine heavy calcium carbonate according to claim 7, characterized in that: A first arc ball (213) is fixedly connected to the edge of the right side of the inner cavity of the linkage groove (212); a top pressure plate (214) is fixedly connected to the surface of the transverse tie rod (204) and located on the inner side of the linkage groove (212); a second arc ball (215) used in conjunction with the first arc ball (213) is fixedly connected to the right side of the top pressure plate (214); a second spring (216) is fixedly connected between the top pressure plate (214) and the left side of the inner cavity of the linkage groove (212); and a retraction block (217) is fixedly connected to the top of each of the first screening cylinder (201) and the second screening cylinder (202).

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