A ball mill device for adjusting the particle size distribution of gypsum powder

Abstract

The application discloses a ball milling device for adjusting particle size distribution of gypsum powder, which comprises multiple horizontal ball mills arranged in sequence from top to bottom and a mixer, and the particle size of the gypsum powder discharged from the horizontal ball mills decreases in sequence from top to bottom; a quantitative feeding mechanism is arranged at the discharge end of the horizontal ball mill, the quantitative feeding mechanism respectively feeds the gypsum powder ground by the horizontal ball mill into the mixer for mixing and the next adjacent horizontal ball mill for further ball milling, so that the gypsum powder input into the horizontal ball mill is obtained by ball milling in the previous adjacent horizontal ball mill. The gypsum powder is ball milled in sequence by the multiple horizontal ball mills with different discharge particle sizes, and the gypsum powder after each ball milling is mixed quantitatively, so that the gypsum powder with different particle size distributions is produced, the specific surface area is increased, the particle size range is also increased, and the particle size distribution required by the gypsum powder for different purposes is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball milling equipment, and particularly relates to a ball milling device for adjusting particle size distribution of gypsum powder. BACKGROUND

[0002] Main raw materials for gypsum product production include building gypsum powder, and the performance of the building gypsum powder directly affects the quality of the final building gypsum product, and factors affecting the performance of the building gypsum powder are many, in which the purity of raw materials, calcination method, fineness of the building gypsum powder and aging effect have the greatest influence on the performance.

[0003] The fineness of the building gypsum powder has a great influence on water demand and the strength of the building gypsum product, and the strength of the gypsum product is improved with the increase of the fineness and specific surface area of the gypsum powder, but when the fineness exceeds a certain value, the strength of the gypsum product will decrease. This is because the finer the particle, the easier it is to dissolve, and the greater the supersaturation. When the supersaturation increases beyond a certain value, the gypsum hardening body will generate a large crystallization stress, which will destroy the structure of the hardening body and result in a decrease in the strength of the gypsum product. At the same time, the water demand of the gypsum powder will also increase.

[0004] Therefore, it is necessary to adjust the range of the fineness and specific surface area of the building gypsum powder, so that the specific surface area is increased while the particle size range of the gypsum powder is also increased, and the particle size distribution of the gypsum powder is adjusted, so as to avoid the decrease in the strength of the gypsum product and adapt to the gypsum products with different hardness and water demand requirements.

[0005] At present, the particle size of the gypsum powder is generally changed by a ball mill, but the gypsum powder produced by the existing ball mill has a narrow particle size range, and when the specific surface area is increased, the particle size range will also be reduced, and the different particle size distributions of the gypsum powder cannot be adjusted according to the use requirements. SUMMARY

[0006] The present application aims to provide a ball milling device for adjusting particle size distribution of gypsum powder, so as to solve the technical problem that the ball mill in the prior art cannot adjust the different particle size distributions of the gypsum powder according to the use requirements.

[0007] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0008] A ball milling device for adjusting particle size distribution of gypsum powder, comprising a plurality of horizontal ball mills arranged in sequence from top to bottom and a mixer, and the particle size of the material discharged from the plurality of horizontal ball mills decreases in sequence from top to bottom.

[0009] The horizontal ball mill is provided with a quantitative feeding mechanism at the discharge end, which respectively feeds the ground gypsum powder of the horizontal ball mill into a mixer and a next adjacent horizontal ball mill for further ball milling, so that the input gypsum powder in the horizontal ball mill is obtained by ball milling in the previous adjacent horizontal ball mill.

[0010] The gypsum powder of different particle size ranges fed into the mixer from the plurality of horizontal ball mills is mixed in the mixer, so as to realize different gradation of the particle size of the gypsum powder.

[0011] Further, the horizontal ball mill comprises a barrel, the inside of the barrel is separated into two ball milling chambers by a screen, and different diameter steel balls are respectively placed in the two ball milling chambers.

[0012] The gypsum powder in the two ball milling chambers flows through the pores on the screen, so as to increase the particle size range of the ground gypsum powder in each barrel.

[0013] Further, the pore size of the screen inside the barrel is smaller than the average particle size of the gypsum powder just entering the inside of the barrel.

[0014] The barrel is provided with an inlet and an outlet, the ball milling chamber close to the inlet in the inside of the barrel is a first chamber, the ball milling chamber close to the outlet in the inside of the barrel is a second chamber, and the diameter of the steel balls in the first chamber is 1-3 times of the diameter of the steel balls in the second chamber.

[0015] The gypsum powder input through the inlet first reaches the first chamber to be ball milled, and when the particle size of the gypsum powder is smaller than the pore size of the screen, the gypsum powder reaches the second chamber through the pores on the screen to be ball milled.

[0016] Further, the capacity of the plurality of horizontal ball mills decreases from top to bottom.

[0017] And the average particle size of the steel balls in the plurality of horizontal ball mills decreases from top to bottom.

[0018] Further, the barrel is arranged to be inclined, so that the height of the outlet is lower than the height of the inlet, and the gypsum powder in the first chamber reaches the inside of the second chamber through the pores on the screen due to gravity.

[0019] The barrel is provided with a discharge pipe at the outlet, a spiral blade is arranged in the inside of the discharge pipe, the end of the discharge pipe away from the barrel is sealed, and the outer surface of the discharge pipe is provided with an opening, so that the barrel drives the discharge pipe to rotate, and when the opening faces downward, the gypsum powder is discharged from the opening.

[0020] Further, the dosing mechanism is arranged between two adjacent horizontal ball mills, and the mixer is provided with a feeding pipe at the input end, and the dosing mechanism at the output end of each horizontal ball mill weighs and doses the ball-milled gypsum powder into the feeding pipe.

[0021] Further, the dosing mechanism comprises a weighing plate that can be tilted left and right, and the weighing plate weighs and doses the gypsum powder to be transferred through a gravity sensor, and the bottom of the weighing plate is provided with telescopic rods on both sides;

[0022] The feeding pipe is sequentially provided with a plurality of through holes corresponding to the weighing plate from top to bottom, one end of the weighing plate is arranged in the corresponding through hole of the feeding pipe, and the other end of the weighing plate is arranged above the feeding port of the next adjacent horizontal ball mill;

[0023] In the initial state, the weighing plate is horizontally arranged, and the last ball-milled gypsum powder falls on the weighing plate from the discharge port, and when the amount of gypsum powder on the weighing plate reaches the set value, the telescopic rods are telescoped to tilt the weighing plate, so that the gypsum powder on the weighing plate is transported into the feeding pipe or the next adjacent horizontal ball mill.

[0024] Further, the weighing plate is provided with a vibration motor, and the top of the telescopic rod is provided with an air bag body.

[0025] Further, a filter screen is arranged on the outer surface of the barrel near the discharge port, and the pore size of the filter screen is smaller than the minimum value of the theoretical discharge particle size range of the horizontal ball mill;

[0026] The gypsum powder filtered from the filter screen is directly transported into the mixer through the dosing mechanism, so that the gypsum powder particles with a particle size smaller than the theoretical discharge particle size range of the horizontal ball mill are not excessively ball-milled.

[0027] Further, a plurality of baffle plates are fixedly connected to the inner wall of the barrel in a ring array and are uniformly distributed;

[0028] The baffle plates are arranged at an angle, and the included angle β between the baffle plates and the tangent line at the point where the baffle plates are located on the inner wall of the barrel is between 50-80 degrees.

[0029] The inclination direction of the baffle plates is consistent with the rotation direction of the barrel, so that the steel balls are moved upward and thrown up through the baffle plates during the rotation of the barrel.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] The present application comprises a plurality of horizontal ball mills with different discharge particle sizes, and the gypsum powder is sequentially ball-milled and mixed with the ball-milled gypsum powder of each time in a dosed manner, so as to produce gypsum powder with different particle size gradations, increase the specific surface area, and increase the particle size range, so as to meet the particle size gradation required by different uses of the gypsum powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0033] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0034] Figure 2 It is a structural schematic diagram of the horizontal ball mill of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the quantitative feeding mechanism of the present invention;

[0036] Figure 4 It is a side sectional view of the barrel of the present invention;

[0037] Figure 5 It is a cross-sectional view of the discharge pipe of the present invention.

[0038] The numbers in the figure represent the following:

[0039] 10- horizontal ball mill; 20- mixer; 30- quantitative feeding mechanism;

[0040] 101-barrel; 102-screen; 103-ball mill chamber; 104-steel balls; 105-feed port; 106-discharge port; 107-first chamber; 108-second chamber; 109-filter screen; 110-baffle; 111-discharge pipe; 112-spiral blade; 113-opening;

[0041] 201-feeding pipe; 202-through hole;

[0042] 301-weighing plate; 302-gravity sensor; 303-telescopic rod; 304-vibration motor; 305-airbag. DETAILED DESCRIPTION

[0043] 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.

[0044] like Figure 1 and Figure 2The application provides a ball mill device for adjusting particle size distribution of gypsum powder, which realizes particle size distribution of gypsum powder by sequentially ball milling gypsum powder through multiple horizontal ball mills 10 with different discharge particle sizes, and comprises multiple horizontal ball mills 10 arranged from top to bottom and a mixer 20.

[0045] The horizontal ball mill 10 is provided with a quantitative feeding mechanism 30 at the discharge end, which respectively feeds the gypsum powder ground by the horizontal ball mill 10 into the mixer 20 for mixing and the next adjacent horizontal ball mill 10 for continuous ball milling, so that the gypsum powder input into the horizontal ball mill 10 is obtained by ball milling in the previous adjacent horizontal ball mill 10.

[0046] The gypsum powder with different particle size ranges fed from the multiple horizontal ball mills 10 into the mixer 20 is mixed in the mixer 20, so as to realize different particle size distribution of the gypsum powder.

[0047] The gypsum powder produced by the existing ball mill has a narrow particle size range, and the particle size range will become smaller when the specific surface area is increased, which will reduce the strength of gypsum powder products, and the particle size distribution of gypsum powder cannot be adjusted according to the use requirements, so it is necessary to develop a ball mill device capable of adjusting the particle size distribution of gypsum powder according to the use requirements.

[0048] The embodiment is provided with multiple horizontal ball mills 10 with different discharge particle sizes, and sequentially ball mills the gypsum powder and mixes the gypsum powder ground each time, so as to produce gypsum powder with different particle size distributions, increase the particle size range while increasing the specific surface area, and meet the particle size distribution required by different uses of gypsum powder.

[0049] In actual use, 1. The gypsum powder to be ball milled is added into the first horizontal ball mill 10, and the first horizontal ball mill 10 preliminarily ball mills the gypsum powder, so that the particle size range of the gypsum powder is in the first horizontal ball mill 10.

[0050] 2. The first horizontal ball mill 10 ball mills the gypsum powder, and the required amount of gypsum powder with the particle size range is weighed by the quantitative feeding mechanism 30 and added into the mixer 20, then the material in the first horizontal ball mill 10 is added into the next adjacent horizontal ball mill 10 for continuous ball milling, and then the new gypsum powder to be ball milled is added into the first horizontal ball mill 10 again.

[0051] 3. Then the next adjacent horizontal ball mill 10 is ball milled, the same amount of gypsum powder of the particle size range is weighed by the quantitative feeding mechanism 30 and added into the mixer 20, and the remaining gypsum powder is added into the next adjacent horizontal ball mill 10 for continuous ball milling, and so on.

[0052] 4. After the device is debugged, gypsum powder is in each horizontal ball mill 10, and then the same amount of gypsum powder of the particle size range is weighed by the quantitative feeding mechanism 30 and added into the mixer 20 at the same time, so as to realize different gradation of the particle size of the gypsum powder.

[0053] As a preferred embodiment of the present embodiment, the horizontal ball mill 10 comprises a barrel 101, the inside of the barrel 101 is separated into two ball milling chambers 103 by a screen 102, and different diameter steel balls 104 are placed in the two ball milling chambers 103 respectively.

[0054] The gypsum powder in the two ball milling chambers 103 flows through the pores of the screen 102, so as to increase the particle size range of the ground gypsum powder in each barrel 101.

[0055] The pore size of the screen 102 in the barrel 101 is smaller than the average particle size of the gypsum powder just entering the inside of the barrel 101;

[0056] The barrel 101 is provided with a feeding port 105 and a discharging port 106, the ball milling chamber 103 close to the feeding port 105 in the inside of the barrel 101 is a first chamber 107, the ball milling chamber 103 close to the discharging port 106 in the inside of the barrel 101 is a second chamber 108, and the diameter of the steel ball 104 in the first chamber 107 is 1-3 times of the diameter of the steel ball 104 in the second chamber 108.

[0057] The gypsum powder input through the feeding port 105 first reaches the first chamber 107 and is ball milled, and when the particle size of the gypsum powder is smaller than the pore size of the screen 102, the gypsum powder reaches the second chamber 108 through the pores of the screen 102 and is ball milled.

[0058] By being provided with the separation net 102, the material in the barrel 101 is divided into two parts for ball milling. In the initial state, the gypsum powder is in the first chamber 107, and as the barrel 101 rotates, the steel balls 104 in the first chamber 107 ball mill the gypsum powder, and the gypsum powder with smaller particle size passes through the apertures of the separation net 102 to the second chamber 108, so that the steel balls 104 with smaller diameter in the second chamber 108 ball mill the gypsum powder again, so as to realize step-by-step ball milling, and the particle size range of the ball-milled particles is larger. The targeted ball milling mode can make the particle size of the gypsum powder smaller, but the step-by-step ball milling mode increases the particle size range, which can well adapt to the characteristics that when the fineness of the gypsum powder exceeds a certain value, the strength of the gypsum product will decrease.

[0059] In order to enable the device to work continuously, the barrel 101 is provided with a plurality of horizontal ball mills 10, as shown in the figure, the capacities of the plurality of horizontal ball mills 10 decrease from top to bottom in turn; and more preferably, the capacity of the first horizontal ball mill 10 is greater than the sum of the capacities of the other horizontal ball mills 10, and the material in each horizontal ball mill 10, except the first horizontal ball mill 10, is obtained by ball milling in the previous horizontal ball mill 10 Figure 1

[0060] and the average particle sizes of the steel balls 104 in the plurality of horizontal ball mills 10 decrease from top to bottom in turn, so that the particle size of the gypsum powder becomes smaller and smaller after passing through the plurality of horizontal ball mills 10, and multi-stage ball milling is realized.

[0061] Based on the above structure, in order to make the discharge of the horizontal ball mill 10 more smooth, and the material can reach from the first chamber 107 to the second chamber 108, as shown in the figure, the barrel 101 is inclinedly arranged, so that the height of the discharge port 106 is lower than the height of the feeding port 105, and then the gypsum powder in the first chamber 107 reaches the inside of the second chamber 108 through the apertures of the separation net 102 due to the action of gravity; the inclined arrangement of the barrel 101 facilitates the transfer of the gypsum powder from the first chamber 107 to the second chamber 108, and also facilitates the discharge. Figure 2 As shown in the figure, the barrel 101 is provided with a discharge pipe 111 at the discharge port 106, a spiral blade 112 is arranged in the discharge pipe 111, one end of the discharge pipe 111 away from the barrel 101 is sealed, and the outer surface of the discharge pipe 111 is provided with an opening 113, so that the barrel 101 drives the discharge pipe 111 to rotate, and when the opening 113 faces downward, the gypsum powder is discharged from the opening 113. By being provided with the opening 113, as the barrel 101 rotates, the discharge pipe 111 also rotates, and when the opening 113 faces downward, the gypsum powder is discharged from the opening 113, which can control the discharge of the material by controlling the rotation of the barrel 101.

[0062] Figure 5 Preferably, when the discharge is not needed, the opening 113 is sealed.

[0063] Preferably, when the discharge is not needed, the opening 113 is sealed. ​​

[0064] Specifically, as shown in Figure 3 The dosing mechanism 30 is arranged between two adjacent horizontal ball mills 10, and the mixer 20 is provided with a feeding pipe 201 at the input end. The dosing mechanism 30 at the output end of each horizontal ball mill 10 weighs and doses the ball-milled gypsum powder into the feeding pipe 201. The dosing mechanism 30 doses the ball-milled gypsum powder into the mixer 20 and the next horizontal ball mill 10.

[0065] Specifically, the dosing mechanism 30 comprises a weighing plate 301 that can be tilted left and right. The weighing plate 301 weighs the gypsum powder to be transferred by a gravity sensor 302. The bottom of the weighing plate 301 is provided with an extension rod 303 on both sides.

[0066] The feeding pipe 201 is sequentially provided with a plurality of through holes 202 corresponding to the weighing plate 301 from top to bottom. One end of the weighing plate 301 is arranged in the corresponding through hole 202 of the feeding pipe 201, and the other end of the weighing plate 301 is arranged above the feeding port 105 of the next adjacent horizontal ball mill 10.

[0067] In the initial state, the weighing plate 301 is arranged horizontally. The last ball-milled gypsum powder falls onto the weighing plate 301 from the discharge port 106. When the amount of gypsum powder on the weighing plate 301 reaches the set value, the weighing plate 301 is tilted by the extension rod 303, so that the gypsum powder on the weighing plate 301 is transferred into the feeding pipe 201 or the next adjacent horizontal ball mill 10. The gravity sensor 302 and the extension rod 303 are electrically connected to the control system. The extension rod 303 is controlled to contract or stretch according to the result value of the gravity sensor 302.

[0068] When the weighing plate 301 is tilted, the gypsum powder is easy to remain on the weighing plate 301 due to its small particle size. In order to solve this problem, as shown in Figure 3 The weighing plate 301 is provided with a vibration motor 304, and the top of the extension rod 303 is provided with an air bag body 305. The vibration motor 304 makes the gypsum powder remaining on the weighing plate 301 fall off, reducing the remaining amount, and the air bag body 305 protects the extension rod 303.

[0069] In order to avoid repeated ball milling of the gypsum powder, further, as shown in Figure 2 and Figure 4 The outer surface of the barrel 101 is provided with a filter screen 109 near the discharge port 106. The pore size of the filter screen 109 is smaller than the minimum value of the theoretical discharge particle size range of the horizontal ball mill 10.

[0070] The gypsum powder filtered from the filter screen 109 is directly delivered into the mixer 20 by the quantitative feeding mechanism 30, so that the gypsum powder particles with a particle size less than the theoretical discharge particle size range of the horizontal ball mill 10 are prevented from being excessively ball milled. The generation of superfine powder can be avoided.

[0071] By being provided with the filter screen 109, the particles with a smaller particle size are screened out in advance, the repeated grinding is avoided to make the particle size of the gypsum powder smaller, and the remaining gypsum powder can be fully ground, and all the gypsum powder is within the required particle size range without the obstruction of the gypsum powder with a smaller particle size, so that the grinding efficiency can be improved.

[0072] The steel balls 104 in the horizontal ball mill 10 are ball milled to the material by falling under the action of the gravity greater than the centrifugal force, but when the centrifugal force is insufficient, the steel balls 104 are difficult to throw upward, in order to solve the problem, the inner wall of the barrel 101 is fixedly connected with a plurality of annularly arrayed and uniformly distributed baffles 110;

[0073] The baffle 110 is obliquely arranged, and the included angle β between the baffle 110 and the tangent of the point on the inner wall of the barrel 101 where the baffle 110 is located is between 50-80 degrees.

[0074] The oblique direction of the baffle 110 is consistent with the rotating direction of the barrel 101, so that the steel balls 104 are moved upward and thrown up by the baffle 110 during the rotation of the barrel 101.

[0075] When the centrifugal force is insufficient, the steel balls 104 can still be sequentially delivered upward by being provided with the baffle 110, and fall and ball mill the gypsum powder due to the action of the gravity and inertia.

[0076] The above embodiments are only exemplary embodiments of the present application, and are not used to limit the present application, the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A ball milling device for adjusting the particle size distribution of gypsum powder, characterized in that: It comprises a plurality of horizontal ball mills (10) and a mixer (20) arranged sequentially from top to bottom, wherein the discharge particle sizes of the plurality of horizontal ball mills (10) decrease sequentially from top to bottom; The horizontal ball mill (10) is provided with a quantitative feeding mechanism (30) at the discharge end thereof. The quantitative feeding mechanism (30) quantitatively transports the gypsum powder ground in the horizontal ball mill (10) to the mixer (20) for mixing and to the next adjacent horizontal ball mill (10) for further ball milling, so that the gypsum powder input into the horizontal ball mill (10) is obtained from the ball milling in the previous adjacent horizontal ball mill (10); Gypsum powders of different particle size ranges are quantitatively transported from the plurality of horizontal ball mills (10) to the mixer (20) and mixed in the mixer (20), thereby achieving different gradations of gypsum powder particle sizes; The horizontal ball mill (10) comprises a barrel (101), the interior of the barrel (101) is divided into two ball milling chambers (103) by a partition (102), and steel balls (104) of different diameters are respectively placed in the two ball milling chambers (103); The gypsum powder in the two ball mill chambers (103) flows through the pores on the partition (102), thereby increasing the particle size range of the gypsum powder after grinding in each barrel (101); The pore size of the partition net (102) inside the barrel (101) is smaller than the average particle size of the gypsum powder when it first enters the barrel (101); The barrel (101) is provided with a feed port (105) and a discharge port (106); the ball milling chamber (103) inside the barrel (101) near the feed port (105) is a first chamber (107); the ball milling chamber (103) inside the barrel (101) near the discharge port (106) is a second chamber (108); the diameter of the steel ball (104) inside the first chamber (107) is 1-3 times the diameter of the steel ball (104) inside the second chamber (108); The gypsum powder input through the feed port (105) first reaches the first chamber (107) and is ball-milled. When the gypsum powder particle size is smaller than the aperture of the screen (102), it passes through the pores of the screen (102) and reaches the second chamber (108) and is ball-milled. The capacities of the plurality of horizontal ball mills (10) decrease sequentially from top to bottom; The average particle size of the steel balls (104) in the horizontal ball mill (10) decreases from top to bottom; the barrel (101) is tilted so that the height of the discharge port (106) is lower than the height of the feed port (105), and the gypsum powder in the first chamber (107) passes through the pores on the partition (102) due to gravity and reaches the interior of the second chamber (108); A discharge pipe (111) is provided at the discharge port (106) of the barrel (101), a spiral blade (112) is provided inside the discharge pipe (111), one end of the discharge pipe (111) away from the barrel (101) is sealed, and an opening (113) is provided on the outer surface of the discharge pipe (111), so that the barrel (101) rotates and drives the discharge pipe (111) to rotate, and when the opening (113) faces downward, the gypsum powder is discharged from the opening (113); The quantitative feeding mechanism (30) is arranged between two adjacent horizontal ball mills (10), and a feeding pipe (201) is provided at the input end of the mixer (20). The quantitative feeding mechanism (30) at the output end of each horizontal ball mill (10) weighs a quantitative amount of ball-milled gypsum powder into the feeding pipe (201); The quantitative feeding mechanism (30) comprises a weighing plate (301) that can be tilted left and right. The weighing plate (301) quantitatively weighs the gypsum powder to be transferred via a gravity sensor (302). Both sides of the bottom of the weighing plate (301) are provided with telescopic rods (303). The feed pipe (201) is provided with a plurality of through holes (202) corresponding to the weighing plates (301) in sequence from top to bottom, one end of the weighing plate (301) is arranged in the corresponding through hole (202) on the feed pipe (201), and the other end of the weighing plate (301) is arranged above the feed port (105) of the next adjacent horizontal ball mill (10); In the initial state, the weighing plate (301) is arranged horizontally, and the gypsum powder after the previous ball milling falls onto the weighing plate (301) from the discharge port (106). When the amount of gypsum powder on the weighing plate (301) reaches a set value, the telescopic rod (303) is extended and retracted to tilt the weighing plate (301), so that the gypsum powder on the weighing plate (301) is transported to the feed pipe (201) or the next adjacent horizontal ball mill (10).

2. A ball milling device for adjusting the gradation of gypsum powder particles according to claim 1, characterized in that: A vibration motor (304) is provided on the weighing plate (301), and an air bag (305) is provided on the top of the telescopic rod (303).

3. A ball milling device for adjusting the gradation of gypsum powder particles according to claim 2, characterized in that: A filter screen (109) is provided on the outer surface of the barrel (101) near the discharge port (106), wherein the aperture of the filter screen (109) is smaller than the minimum value of the theoretical discharge particle size range of the horizontal ball mill (10) in which the filter screen (109) is located; The gypsum powder filtered out of the filter screen (109) is directly conveyed to the mixer (20) through the quantitative feeding mechanism (30), thereby preventing gypsum powder particles having a particle size smaller than the theoretical discharge particle size range of the horizontal ball mill (10) from being excessively ball-milled.

4. A ball milling device for adjusting the gradation of gypsum powder particles according to claim 3, characterized in that: A plurality of baffles (110) evenly distributed in a circular array are fixedly connected to the inner wall of the barrel (101); The baffle (110) is tilted so that the angle β between the baffle (110) and the tangent line of the inner wall of the barrel (101) passing through the baffle (110) is between 50 and 80 degrees; The inclination direction of the baffle (110) is consistent with the rotation direction of the barrel (101), so that the steel ball (104) is moved upward and thrown up through the baffle (110) during the rotation of the barrel (101).

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