Fly ash processing equipment and preparation method thereof

Abstract

The present invention discloses a fly ash processing equipment and a preparation method thereof, which includes a fly ash processing equipment, the processing equipment includes a ball mill, the ball mill includes a ball mill cylinder and side covers arranged at both ends of the ball mill cylinder, side lining plates are arranged on opposite sides of the two side covers, a holding space is arranged between one side lining plate and the side cover, and the other side lining plate is connected to the side cover; a plurality of arc lining plates are installed on the inner wall of the ball mill cylinder, each arc lining plate is composed of a base and a baffle plate, a first placement groove is arranged inside the baffle plate, and a blocking plate is rotatably installed at the notch of the first placement groove. In the initial stage of starting the ball mill, the present invention can ensure that the grinding balls have the best grinding effect and ensure the grinding efficiency by changing the deflection angle of the blocking plate, and the grinding balls are in a state of rising and falling when sliding down, so that the materials attached to the grinding balls can be more easily dropped.

Description

Technical Field

[0001] The invention mainly relates to the technical field of fly ash production, and specifically relates to fly ash processing equipment and a preparation method thereof. Background Art

[0002] Fly ash is the fine ash collected from the flue gas after coal combustion, and is the main solid waste discharged by coal-fired power plants. With the development of the power industry, the amount of fly ash discharged from coal-fired power plants has increased year by year, becoming one of the largest industrial waste residues currently discharged. Fly ash is composed of glass microspheres with a particle size of 1-100µm. It is used as an admixture for concrete, showing its unique ball effect, which can greatly improve the workability of concrete; it has a good volcanic ash effect. After grinding and fine sorting, its activity can be increased from 70% to 93%, which is better than the activity of silica fume. The average particle size is reduced to less than 4µm, thereby improving the micro-aggregate filling effect. As a result, fly ash has been widely used in the building materials industry, which is undoubtedly an effective way to digest fly ash in bulk. However, the fly ash currently used in cement and concrete has not been processed, has a low added value, and the dosage is less than 50%, and the utilization rate is low. How to prepare fly ash with high functional effects and increase the dosage of fly ash in cement is the research and development direction for deepening the utilization of fly ash.

[0003] In the production of fly ash, it is inevitable to use a ball mill to grind the fly ash. The grinding effect of the ball mill is achieved by the friction and impact between the grinding balls and the barrel wall and the raw materials when the mill barrel rotates. When the speed of the ball mill is too slow, the grinding balls will not rise high and will slide down, and the crushing effect is very small; when the speed is too fast, the grinding media will adhere to the inner wall of the mill and rotate with the material, and the grinding of the material will stop. At the same time, the centrifugal force of the grinding balls is greater than the gravity, and the ball milling media will cling to the inner wall of the ball mill container. The grinding balls, powder and mill barrel are in a relatively static state. At this time, the ball milling effect stops, and the ball milled materials do not produce any impact, which is not conducive to plastic deformation and alloying process.

[0004] And when the ball mill is running, its speed needs to be constantly adjusted and changed, especially in the start-up stage of the ball mill, its speed cannot be too large, otherwise it will cause the ball mill to heat up too quickly and the torque to change too drastically, causing damage to the ball mill. During the speed adaptation stage of the ball mill, the grinding work will be suspended, seriously affecting the grinding efficiency. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a fly ash processing equipment and a preparation method thereof to solve the technical problems raised in the above background technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A fly ash processing device, comprising a ball mill, the ball mill comprising a ball mill cylinder and side covers arranged at both ends of the ball mill cylinder, two side covers are provided with side lining plates on opposite sides, a containing space is provided between one of the side lining plates and the side cover, and the other side lining plate is connected to the side cover;

[0008] A plurality of arc lining plates are installed on the inner wall of the ball mill cylinder, each of which is composed of a base and a material baffle plate, a first mounting groove is provided inside the material baffle plate, and a sealing plate is rotatably installed at the groove mouth of the first mounting groove, a plurality of equidistantly distributed lifting rods are installed on the side of the sealing plate facing the outside of the first mounting groove, and a lifting ball is installed on each of the lifting rods, a fixed frame is installed inside the first mounting groove, a sliding block is slidably provided on the fixed frame, a fixed rod in contact with the sealing plate is installed on one side of the sliding block, and a translation telescopic rod sliding inside the first mounting groove is installed on the other side of the sliding block, a second mounting groove connected to the first mounting groove is provided inside the base, and a hydraulic rod is provided inside the second mounting groove, and a pull rope is connected between the top of the hydraulic rod and the translation telescopic rod.

[0009] Preferably, the side liner and the side cover are both rotatably connected to the material inlet of the ball mill.

[0010] Preferably, a special-shaped ring plate and a plurality of centrifugal frames are provided in the accommodating space, and the plurality of centrifugal frames are installed on the side cover and are equidistantly distributed in a circle with the axis of the side cover as the center, and a centrifugal block is slidably arranged on each centrifugal frame, and an elastic telescopic rod is connected between one side of the centrifugal block and the centrifugal frame body, the special-shaped ring plate is rotatably connected to the material inlet of the ball mill and slides back and forth on the material inlet of the ball mill, the special-shaped ring plate is an inclined surface facing the centrifugal frame, and a connecting block is provided on the inclined surface for sliding left and right, and the connecting block and the centrifugal block are connected by a plurality of connecting rods.

[0011] Preferably, each centrifugal frame has an electric push rod installed on one side of the centrifugal frame, and the electric push rod is connected to a through rod via a connecting frame. The through rod penetrates one of the side linings and all the arc linings on the same vertical row. Each arc lining contains a liquid storage cylinder body, and the liquid storage cylinder body is detachably installed inside the arc lining plate. The liquid storage cylinder body and the hydraulic rod are connected by a pipeline. A piston rod slides inside the liquid storage cylinder body, and the other end of the piston rod is installed on the through rod.

[0012] Preferably, an electric control button directly opposite to the electric push rod is provided on the special-shaped ring plate. When the electric control button is pressed, the electric push rod stops running. Conversely, when the electric control button is not pressed, the electric push rod continues to run.

[0013] A method for preparing fly ash, applied to the fly ash processing equipment, comprises the following steps:

[0014] S1. In the raw material warehouse, the raw fly ash is placed into the grinding head air chute according to the set flow rate. The grinding head air chute transports the raw material into the grinding head elevator, and the grinding head elevator lifts the raw material into the ball mill;

[0015] S2. In the initial stage of ball mill startup, the speed of the ball mill is low, the deflection angle of the blocking plate is smaller, and the grinding balls are difficult to fall, ensuring that the grinding balls reach a certain height to ensure the grinding effect; as the ball mill runs, the speed of the ball mill increases, and the deflection angle of the blocking plate becomes larger, ensuring that the height that the grinding balls can reach remains unchanged, and the grinding effect is always at the best;

[0016] S3, fly ash is ground into semi-finished products in the ball mill, and the semi-finished products are sent to the tail mill elevator through the tail mill air chute, and then enter the powder selector through the tail mill elevator;

[0017] S4. The selected fine powder becomes a finished product that meets the standards after being dusted by a bag dust collector. The finished product is transported to the finished product warehouse, and the semi-finished products that do not meet the standards are returned to the grinding head elevator and enter the ball mill for re-grinding, powder selection, and dust collection.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) In the initial stage of the ball mill startup, the ball mill speed is low, the grinding balls will not rise high and will slide down, and the crushing effect is very small. When rotating, the grinding balls will hit the top ball and sink into the first placement slot. If the grinding balls need to be separated from the first placement slot, a larger tilting angle is required. A larger tilting angle requires the arc liner to drive the grinding balls to a certain height to ensure that the grinding balls have a good grinding effect. As the speed increases, the hydraulic rod continues to extend, and the pull rope drives the translation telescopic rod to move, so that the slider slides on the fixed frame and the blocking plate moves outward. The grinding balls themselves can reach a higher height due to centrifugal force, so the depth of the grinding balls sinking into the first placement slot is reduced. In this way, no matter how the ball mill speed changes, the best grinding effect can be guaranteed;

[0020] (2) When the grinding balls slide down, due to the presence of several top balls, the grinding balls will rise and fall, which can make the materials attached to the grinding balls fall off more easily, further increasing the grinding effect;

[0021] (3) When the ball mill is started, the electric push rod starts with it. At this time, since the electric push rod squeezes the electric control button, the electric push rod will not extend. As the speed increases, the centrifugal force increases, and the centrifugal block moves a greater distance on the centrifugal frame. As the centrifugal block moves, it pushes the special-shaped ring plate to move, causing the electric push rod and the electric control button to separate. The electric push rod extends and pushes the through rod to move. The movement of the through rod drives the piston rod to move, so that the oil inside the liquid storage cylinder is squeezed into the hydraulic rod, causing the hydraulic rod to extend until the electric push rod squeezes the electric control button again. The faster the ball mill speed, the greater the centrifugal force, and the through rod drives the piston rod to move a greater distance, causing the hydraulic rod to extend a greater distance, thereby causing the blocking plate to move outward, making it easier for the grinding balls to slide off, so that the telescopic length change of the hydraulic rod can change with the speed of the ball mill in real time, further increasing the grinding effect.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a ball mill of the present invention;

[0024] Figure 2 This is a schematic diagram of the distribution structure of the arc lining side panel of the present invention;

[0025] Figure 3 It is a schematic diagram of the side view structure of the arc liner of the present invention;

[0026] Figure 4 It is a schematic diagram of the top view of the ball mill cylinder of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified image of point A;

[0028] Figure 6 It is a schematic diagram of the connection between the penetration rod and the liquid storage cylinder body of the present invention.

[0029] In the figure:

[0030] 1. ball mill; 101. ball mill cylinder; 102. side cover; 103. side lining plate;

[0031] 2. Accommodating space; 201. Centrifugal frame; 202. Centrifugal block; 203. Elastic telescopic rod; 204. Special-shaped ring plate; 205. Connecting block; 206. Electric push rod; 207. Electric control button; 208. Through rod; 209. Liquid storage cylinder; 210. Piston rod;

[0032] 3. Arc lining plate; 301. Base; 302. Material blocking plate; 303. Sealing plate; 304. Lifting rod; 305. Lifting ball; 306. Fixed frame; 307. Sliding block; 308. Fixed rod; 309. Translation telescopic rod; 310. Hydraulic rod; 311. Pull rope. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0036] Please refer to the attached picture Figure 1 A fly ash processing equipment includes a ball mill 1, which includes a ball mill body 101 and side covers 102 arranged at both ends of the ball mill body 101, and side liners 103 are arranged on opposite sides of the two side covers 102, a receiving space 2 is arranged between one side liner 103 and the side cover 102, and the other side liner 103 is connected to the side cover 102; the side liner 103 and the side cover 102 are both rotatably connected to the material channel of the ball mill 1.

[0037] Please refer to the attached picture Figure 1 - Figure 3A plurality of arc lining plates 3 are installed on the inner wall of the ball mill cylinder 101, and each arc lining plate 3 is composed of a base 301 and a baffle plate 302. A first mounting groove is provided inside the baffle plate 302, and a blocking plate 303 is rotatably installed at the notch of the first mounting groove. A plurality of equidistantly distributed lifting rods 304 are installed on the side of the blocking plate 303 facing the outside of the first mounting groove, and a lifting ball 305 is installed on each lifting rod 304. A fixing frame 306 is installed inside the first mounting groove, and a slider 307 is slidably provided on the fixing frame 306. A fixing rod 308 in contact with the blocking plate 303 is installed on one side of the slider 307, and a translation telescopic rod 309 sliding inside the first mounting groove is installed on the other side of the slider 307. A second mounting groove connected to the first mounting groove is provided inside the base 301, and a hydraulic rod 310 is provided inside the second mounting groove, and a pull rope 311 is connected between the top of the hydraulic rod 310 and the translation telescopic rod 309. In the initial stage of starting the ball mill 1, the rotation speed of the ball mill 1 is relatively low, and the grinding balls will not rise high and will slide down, and the crushing effect is very small. When rotating, the grinding balls will be against the lifting ball 305 and sink into the first receiving groove. If the grinding balls need to be separated from the first receiving groove, a larger tilting angle is required, and a larger tilting angle requires the arc lining plate 3 to drive the grinding balls to a certain height to ensure that the grinding balls have a good grinding effect. As the rotation speed increases, the hydraulic rod 310 continues to extend, and the pull rope 311 drives the translation telescopic rod 309 to move, so that the slider 307 slides on the fixed frame 306, allowing the sealing plate 303 to move outward. The grinding balls themselves can reach a higher height due to centrifugal force, so the depth of the grinding balls sinking into the first receiving groove is reduced. In this way, no matter how the rotation speed of the ball mill 1 changes, the best grinding effect can be guaranteed.

[0038] When the grinding ball slides down, due to the presence of a plurality of lifting balls 305, the grinding ball is in a state of rising and falling when sliding down, so that the material attached to the grinding ball can fall off more easily.

[0039] Please refer to the attached picture Figure 3 - Figure 6A special-shaped ring plate 204 and a plurality of centrifugal racks 201 are provided in the accommodating space 2. The plurality of centrifugal racks 201 are installed on the side cover 102 and are equidistantly distributed in a circle with the axis of the side cover 102 as the center. A centrifugal block 202 is slidably arranged on each centrifugal rack 201. An elastic telescopic rod 203 is connected between one side of the centrifugal block 202 and the frame body of the centrifugal rack 201. The special-shaped ring plate 204 is rotatably connected to the material inlet of the ball mill 1 and slides back and forth on the material inlet of the ball mill 1. The special-shaped ring plate 204 is an inclined surface facing the centrifugal rack 201, and a connecting block 205 is slidably arranged on the inclined surface. The connecting block 205 and the centrifugal block 202 are connected by a plurality of connecting rods. Each centrifugal frame 201 has an electric push rod 206 installed on the side cover 102 on one side. The electric push rod 206 is connected to a through rod 208 through a connecting frame. The through rod 208 penetrates one of the side lining plates 103 and all the arc lining plates 3 on the same vertical row. Each arc lining plate 3 contains a liquid storage cylinder 209 inside. The liquid storage cylinder 209 is detachably installed inside the arc lining plate 3. The liquid storage cylinder 209 and the hydraulic rod 310 are connected through a pipeline. A piston rod 210 slides inside the liquid storage cylinder 209, and the other end of the piston rod 210 is installed on the through rod 208. The special-shaped ring plate 204 is provided with an electric control button 207 directly opposite to the electric push rod 206. When the electric control button 207 is pressed, the electric push rod 206 stops running. Conversely, when the electric control button 207 is not pressed, the electric push rod 206 continues to run.

[0040] When the ball mill 1 is started, the electric push rod 206 is started accordingly. At this time, since the electric push rod 206 squeezes the electric control button 207, the electric push rod 206 will not extend. As the rotation speed continues to increase, the centrifugal force becomes greater, and the centrifugal block 202 moves a greater distance on the centrifugal frame 201. As the centrifugal block 202 moves, the special-shaped ring plate 204 is pushed to move, so that the electric push rod 206 and the electric control button 207 are separated. The electric push rod 206 extends and pushes the through rod 208 to move. The movement of the through rod 208 drives the piston rod 210 to move, so that the oil inside the liquid storage cylinder 209 is squeezed into the hydraulic rod 310, so that the hydraulic rod 310 extends until the electric push rod 206 squeezes the electric control button 207 again. The faster the ball mill 1 rotates, the greater the centrifugal force is, and the through rod 208 drives the piston rod 210 to move a greater distance, so that the hydraulic rod 310 is extended a greater distance, thereby allowing the blocking plate 303 to move outward, making it easier for the grinding balls to slide off.

[0041] A method for preparing fly ash, applied to the fly ash processing equipment, comprises the following steps:

[0042] S1, in the raw material warehouse, the raw material fly ash is put into the grinding head air chute according to the set flow rate, and the grinding head air chute transports the raw material into the grinding head elevator, and the grinding head elevator is lifted into the ball mill 1;

[0043] S2, in the initial stage of the ball mill 1 starting, the speed of the ball mill 1 is low, the deflection angle of the blocking plate 303 is smaller, and the grinding balls are difficult to fall, ensuring that the grinding balls reach a certain height to ensure the grinding effect; as the ball mill 1 runs, the speed of the ball mill 1 increases, and the deflection angle of the blocking plate 303 becomes larger, ensuring that the height that the grinding balls can reach remains unchanged, and the grinding effect is always at the best;

[0044] S3, fly ash is ground into semi-finished products in ball mill 1, and the semi-finished products are sent to the tail mill elevator through the tail mill air chute, and then enter the powder concentrator through the tail mill elevator;

[0045] S4. The selected fine powder becomes a finished product that meets the standards after being dusted by a bag dust collector. The finished product is transported to the finished product warehouse, and the semi-finished product that does not meet the standards is returned to the grinding head elevator and enters the ball mill 1 for re-grinding, powder selection, and dust collection.

[0046] Specific steps:

[0047] The ball mill 1 is started, and the electric push rod 206 is started accordingly. In the initial stage of the ball mill 1 starting, the speed of the ball mill 1 is relatively low, and the grinding balls will be against the top ball 305 and fall into the first placement groove. If the grinding balls need to be separated from the first placement groove, a larger tilting angle is required, and a larger tilting angle requires the arc liner 3 to drive the grinding balls to a certain height to ensure that the grinding balls have a good grinding effect. As the speed increases, the centrifugal force increases, and the centrifugal block 202 moves a greater distance on the centrifugal frame 201. As the centrifugal block 202 moves, the shaped ring plate 202 is pushed. 04 moves, so that the electric push rod 206 and the electric control button 207 are separated, the electric push rod 206 extends and pushes the through rod 208 to move, and the movement of the through rod 208 drives the piston rod 210 to move, so that the oil inside the liquid storage cylinder 209 is squeezed into the hydraulic rod 310, so that the hydraulic rod 310 extends, and the translation telescopic rod 309 is driven to move by the pull rope 311, so that the slider 307 slides on the fixed frame 306, and the sealing plate 303 moves outward, and the depth of the grinding balls sunk into the notch of the first placement groove is reduced. In this way, no matter how the rotation speed of the ball mill 1 changes, the best grinding effect can be guaranteed.

[0048] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A fly ash processing device, comprising a ball mill (1), characterized in that: The ball mill (1) comprises a ball mill cylinder (101) and side covers (102) arranged at both ends of the ball mill cylinder (101); side lining plates (103) are arranged on opposite sides of the two side covers (102); a receiving space (2) is arranged between one of the side lining plates (103) and the side cover (102); the other side lining plate (103) and the side cover (102) are connected; a special-shaped ring plate (204) and a plurality of centrifugal racks (201) are arranged in the receiving space (2); the plurality of centrifugal racks (201) are arranged on the side covers (102), and are equidistantly distributed on a circle with the axis of the side cover (102) as the center, each of the centrifugal frames (201) is provided with a centrifugal block (202) slidingly, an elastic telescopic rod (203) is connected between one side of the centrifugal block (202) and the frame body of the centrifugal frame (201), the special-shaped ring plate (204) is rotatably connected to the material inlet of the ball mill (1), and slides back and forth on the material inlet of the ball mill (1), the special-shaped ring plate (204) is inclined on one side facing the centrifugal frame (201), and a connecting block (205) is provided on the inclined surface to slide left and right, the The connecting block (205) and the centrifugal block (202) are connected via a plurality of connecting rods. Each centrifugal frame (201) is provided with an electric push rod (206) mounted on the side cover (102) on one side. The electric push rod (206) is connected to a through rod (208) via the connecting frame. The through rod (208) penetrates one of the side lining plates (103) and all the arc lining plates (3) in the same vertical row. Each of the arc lining plates (3) contains a liquid storage cylinder (209) inside. The liquid storage cylinder (209) is detachably mounted inside the arc lining plate (3). The liquid storage cylinder (209) and the hydraulic rod (310) are connected by a pipeline. A piston rod (210) is slidably disposed inside the liquid storage cylinder (209). The other end of the piston rod (210) is mounted on the through rod (208). An electric control button (207) directly opposite to the electric push rod (206) is disposed on the special-shaped ring plate (204). When the electric control button (207) is pressed, the electric push rod (206) stops running. Conversely, when the electric control button (207) is not pressed, the electric push rod (206) continues running. The inner wall of the ball mill cylinder (101) is provided with a plurality of arc lining plates (3), each of which is composed of a base (301) and a material blocking plate (302), a first placement groove is provided inside the material blocking plate (302), and a blocking plate (303) is rotatably mounted at the groove opening of the first placement groove, a plurality of equidistantly distributed lifting rods (304) are installed on the side of the blocking plate (303) facing the outside of the first placement groove, and each of the lifting rods (304) is installed with a lifting ball (305), and a fixed lifting rod (305) is installed inside the first placement groove. A frame (306) is provided, wherein a slider (307) is slidably mounted on the fixed frame (306), a fixed rod (308) in contact with the blocking plate (303) is mounted on one side of the slider (307), and a translation telescopic rod (309) that slides inside a first placement groove is mounted on the other side of the slider (307), a second placement groove connected to the first placement groove is provided inside the base (301), a hydraulic rod (310) is provided inside the second placement groove, and a pull rope (311) is connected between the top of the hydraulic rod (310) and the translation telescopic rod (309).

2. A fly ash processing equipment according to claim 1, characterized in that: The side lining plate (103) and the side sealing cover (102) are both rotatably connected to the material inlet of the ball mill (1).

3. A method for preparing fly ash, applied to a fly ash processing equipment according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. In the raw material warehouse, the raw fly ash is placed into the grinding head air chute according to the set flow rate. The grinding head air chute transports the raw material into the grinding head elevator, and the grinding head elevator lifts the raw material into the ball mill; S2, in the initial stage of starting the ball mill (1), the rotation speed of the ball mill (1) is relatively low, the deflection angle of the blocking plate (303) is relatively small, and the grinding balls are difficult to fall off, thereby ensuring that the grinding balls reach a certain height to ensure the grinding effect; as the ball mill (1) runs, the rotation speed of the ball mill (1) increases, and the deflection angle of the blocking plate (303) becomes larger, thereby ensuring that the height that the grinding balls can reach remains unchanged, and the grinding effect is always at an optimal level; S3, fly ash is ground into semi-finished products in the ball mill, and the semi-finished products are sent to the tail mill elevator through the tail mill air chute, and then enter the powder selector through the tail mill elevator; S4. The selected fine powder becomes a finished product that meets the standards after being dusted by a bag dust collector. The finished product is transported to the finished product warehouse, and the semi-finished products that do not meet the standards are returned to the grinding head elevator and enter the ball mill for re-grinding, powder selection, and dust collection.

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