Preparation equipment of phosphogypsum as filler

Abstract

The application discloses a kind of preparation equipment of phosphogypsum as filler, belong to phosphogypsum technical field, including heating furnace for sintering phosphogypsum, hollow conical grinding seat for grinding phosphogypsum and screening box for screening phosphogypsum particles, the inside bottom end of heating furnace and outside bottom end are all conical surface structure, the bottom end of heating furnace is provided with material leakage, the inside of heating furnace is provided with heating assembly, the outer wall of heating furnace is provided with spiral conveying blade for conveying phosphogypsum, the sidewall of heating furnace is provided with circulation port above spiral conveying blade.The application is provided with heating furnace, heating assembly, screening box and hollow conical grinding seat, can realize the sintering, grinding and cooling function of phosphogypsum, so as to need multiple independent equipment cooperation, need not to turn around phosphogypsum between each equipment, greatly reduce the workload of processing personnel, improve processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of phosphogypsum technology, and in particular to an apparatus for preparing phosphogypsum as a filler. Background Technology

[0002] Phosphogypsum refers to the solid waste residue generated during the treatment of phosphate rock with sulfuric acid in phosphoric acid production; its main component is calcium sulfate.

[0003] In the preparation of phosphogypsum filler, phosphogypsum needs to be sintered at a surface temperature of 180 degrees Celsius, then ground into granules, and finally cooled to room temperature to obtain hemihydrate gypsum as raw material. Existing phosphogypsum processing requires separate equipment for the heating, grinding, and cooling processes, necessitating the handling of phosphogypsum between different machines. This involves steps such as material handling, feeding, and transportation, significantly increasing the workload of processing personnel and reducing the processing efficiency of phosphogypsum. Therefore, a new equipment for preparing phosphogypsum as a filler is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the existing phosphogypsum processing requires separate equipment for processes such as heating, grinding and cooling, which greatly increases the workload of processing personnel and reduces the processing efficiency of phosphogypsum. Therefore, this invention proposes a preparation equipment for phosphogypsum as a filler.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for preparing phosphogypsum as a filler includes a heating furnace for sintering phosphogypsum, a hollow conical grinding seat for grinding phosphogypsum, and a screening box for screening phosphogypsum particles. The inner and outer bottom ends of the heating furnace are both conical. A discharge port is provided at the bottom end of the heating furnace. A heating component is provided on the inner side of the heating furnace. A spiral conveying blade for conveying phosphogypsum is provided on the outer wall of the heating furnace. A circulation port is provided on the side wall of the heating furnace above the spiral conveying blade. The screening box is rotatably mounted on the surface of the heating furnace. A screening screen for screening phosphogypsum particles is provided on the side wall of the screening box. The bottom of the screening box has a hollow structure. The hollow conical grinding seat is rotatably connected to the inner wall of the screening box near the bottom end. An outer box is fixedly connected to the outer wall of the screening box. Multiple discharge ports are provided at the bottom end of the outer box.

[0007] Preferably, an auxiliary transmission wheel is fixedly connected to the bottom end of the hollow conical grinding seat, and an outer transmission ring is fixedly connected to the surface of the heating furnace near the top.

[0008] Preferably, a dual-axis motor is provided on one side of the outer casing, and a drive drive wheel is fixedly connected to the output ends of the dual-axis motor on both sides. A synchronous belt is connected between the drive drive wheel and the outer drive ring and the auxiliary drive wheel.

[0009] Preferably, a water injection pipe that passes through the auxiliary transmission wheel is fixedly connected to the bottom end of the hollow conical grinding seat, and a valve is provided on the water injection pipe.

[0010] Preferably, the bottom of the heating furnace is provided with a plurality of grinding protrusions that contact the surface of the hollow conical grinding seat. A guide ring is fixedly connected to the surface of the hollow conical grinding seat. The guide ring can guide the granular phosphogypsum at an oblique upward direction, so that the spiral conveyor blades can realize the function of conveying the granular phosphogypsum.

[0011] Preferably, a nut block is fixedly connected to the inner wall of the heating furnace near the top, and the heating assembly includes a feeding pipe threaded to the inside of the nut block, a hopper fixedly connected to the top of the feeding pipe, and a combustion chamber fixedly connected to the bottom of the feeding pipe.

[0012] Preferably, the side wall of the combustion chamber is provided with a partition mesh plate, which can isolate the phosphogypsum and at the same time ensure that the fuel inside the combustion chamber can achieve the sintering function of the phosphogypsum.

[0013] Multiple stirring rods are fixedly connected to the surface of the feeding pipe. The stirring rods can stir and break up the phosphogypsum, turning large pieces of phosphogypsum into smaller pieces, so that the smaller pieces of phosphogypsum can enter the gap between the hollow conical grinding seat and the bottom of the heating furnace.

[0014] Preferably, a telescopic rod is fixedly connected to the surface of the feeding pipe via a connecting plate, and the bottom end of the telescopic rod is fixedly connected to the top end of the screening box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention, by setting up a heating furnace, heating components, screening box and hollow conical grinding seat, can realize the sintering, grinding and cooling functions of phosphogypsum, so that multiple independent equipment do not need to cooperate with each other, and there is no need to transfer phosphogypsum between various equipment, which greatly reduces the workload of processing personnel and improves processing efficiency.

[0017] 2. This invention is equipped with a screening box, a screening screen and spiral conveying blades. The hollow conical grinding seat rotates at high speed to generate centrifugal force, which causes the ground phosphogypsum particles to be thrown out and hit the screening screen. Qualified phosphogypsum particles will pass through the screening screen, while unqualified particles will be blocked and transported to the circulation port by the spiral conveying blades, falling back into the heating furnace for secondary grinding until qualified particles are obtained. Attached Figure Description

[0018] Figure 1 This is a cross-sectional three-dimensional structural schematic diagram of a device for preparing phosphogypsum as a filler according to the present invention;

[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the assembly structure of a preparation device for phosphogypsum as a filler proposed in this invention;

[0021] Figure 4 This is a schematic diagram of the external three-dimensional structure of a preparation device for phosphogypsum as a filler proposed in this invention. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the external three-dimensional structure of a preparation device for phosphogypsum as a filler proposed in this invention. Figure 2 ;

[0023] Figure 6 This is a cross-sectional schematic diagram of the heating furnace in the equipment for preparing phosphogypsum as a filler proposed in this invention.

[0024] In the diagram: 1. Outer box; 2. Screening box; 3. Telescopic rod; 4. Hopper; 5. Screening mesh; 6. Outer transmission ring; 7. Dual-shaft motor; 8. Hollow conical grinding seat; 9. Water injection pipe; 10. Heating furnace; 1001. Circulation port; 11. Guide ring; 12. Screw conveyor blades; 13. Feeding pipe; 14. Grinding protrusions; 15. Stirring rod; 16. Combustion chamber. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Reference Figure 1-6 A device for preparing phosphogypsum as a filler includes a heating furnace 10 for sintering phosphogypsum, a hollow conical grinding seat 8 for grinding phosphogypsum, and a screening box 2 for screening phosphogypsum particles. The bottom inner and outer sides of the heating furnace 10 are both conical. A material discharge port is provided at the bottom of the heating furnace 10. A heating component is provided inside the heating furnace 10.

[0027] It should be noted that during the sintering of phosphogypsum, a material leakage blocking function can be achieved. The conical structure at the bottom inner side of the heating furnace 10 allows the phosphogypsum to accumulate near the heating components, thereby improving sintering efficiency.

[0028] The inner wall of the heating furnace 10 is fixedly connected to a nut block near the top. The heating assembly includes a feeding pipe 13 threadedly connected to the inner side of the nut block, a hopper 4 fixedly connected to the top of the feeding pipe 13, and a combustion chamber 16 fixedly connected to the bottom of the feeding pipe 13. The side wall of the combustion chamber 16 is provided with a partition mesh plate, which can isolate the phosphogypsum and ensure that the fuel inside the combustion chamber 16 can achieve the sintering function of the phosphogypsum.

[0029] It should be noted that the fuel required for combustion is fed into the combustion chamber 16 through the hopper 4 and the feeding pipe 13 for combustion, which can realize the sintering function of phosphogypsum.

[0030] Multiple stirring rods 15 are fixedly connected to the surface of the feeding pipe 13. The stirring rods 15 can stir and crush the phosphogypsum, turning large pieces of phosphogypsum into small pieces, so that the small pieces of phosphogypsum can enter the gap between the hollow conical grinding seat 8 and the bottom of the heating furnace 10.

[0031] It should be noted that when the heating furnace 10 rotates, it drives the nut block to rotate, causing the feeding pipe 13 to move the combustion chamber 16 slightly upward (the surface of the feeding pipe 13 is only partially provided with external threads that are threaded to the nut block; when the nut block separates from the external threads, the feeding pipe 13 no longer moves upward), thereby causing the combustion chamber 16 to separate from the discharge port. The phosphogypsum inside the heating furnace 10 rotates with the heating furnace 10 and collides with the stirring plate, achieving the initial crushing function of the phosphogypsum.

[0032] The surface of the feeding pipe 13 is fixedly connected to the telescopic rod 3 via a connecting plate, and the bottom end of the telescopic rod 3 is fixedly connected to the top end of the screening box 2.

[0033] It should be noted that the telescopic rod 3, in conjunction with the connecting rod, can achieve the limiting function of the feeding tube 13, so that the feeding rod can move up and down under the drive of the nut block.

[0034] The outer wall of the heating furnace 10 is provided with a spiral conveying blade 12 for conveying phosphogypsum. A circulation port 1001 is opened on the side wall of the heating furnace 10 above the spiral conveying blade 12. The screening box 2 is rotatably mounted on the surface of the heating furnace 10. The side wall of the screening box 2 is provided with a screening screen 5 for screening phosphogypsum particles. The bottom of the screening box 2 has a hollow structure. The hollow conical grinding seat 8 is rotatably connected to the inner wall of the screening box 2 near the bottom. An outer box 1 is fixedly connected to the outer wall of the screening box 2. Multiple discharge ports are opened at the bottom of the outer box 1.

[0035] It should be noted that the rotation of the heating furnace 10 drives the spiral conveyor blades 12 to rotate, which can transport the unqualified phosphogypsum particles after grinding, so that they can return to the inside of the heating furnace 10 through the circulation port 1001 for secondary grinding, thus ensuring the thorough grinding of the phosphogypsum.

[0036] An auxiliary transmission wheel is fixedly connected to the bottom end of the hollow conical grinding seat 8, and an outer transmission ring 6 is fixedly connected to the surface of the heating furnace 10 near the top.

[0037] A dual-axis motor 7 is installed on one side of the outer box 1. The output ends of the dual-axis motor 7 are fixedly connected to the drive drive wheel. The drive drive wheel is connected to the outer drive ring 6 and the auxiliary drive wheel by a synchronous belt.

[0038] It should be noted that the radius of the outer transmission ring 6 is much larger than the radius of the auxiliary transmission wheel, which makes the rotation speed of the hollow conical grinding seat 8 much larger than the rotation speed of the combustion furnace, resulting in relative rotation between the hollow conical grinding seat 8 and the combustion furnace, enabling the grinding protrusion 14 to achieve the grinding function of phosphogypsum.

[0039] The bottom end of the hollow conical grinding base 8 is fixedly connected to a water injection pipe 9 that passes through the auxiliary transmission wheel, and a valve is installed on the water injection pipe 9.

[0040] It should be noted that: the water injection pipe 9 injects water into the inside of the hollow conical grinding seat 8, so that the hollow conical grinding seat 8 can cool down the phosphogypsum particles.

[0041] The bottom of the heating furnace 10 is provided with multiple grinding protrusions 14 that contact the surface of the hollow conical grinding seat 8. A guide ring 11 is fixedly connected to the surface of the hollow conical grinding seat 8. The guide ring 11 can guide the granular phosphogypsum at an upward angle, so that the spiral conveying blades 12 can realize the function of conveying granular phosphogypsum.

[0042] The bidirectional motor is existing technology, model JB5274-91. It can drive the hollow conical grinding seat 8 and the heating furnace 10 to rotate, which will not be described in detail here.

[0043] When this invention is used, phosphogypsum is placed inside the heating furnace 10, and then fuel is fed into the combustion chamber 16 through the hopper 4 and the feeding pipe 13 for combustion, thereby realizing the sintering function of phosphogypsum.

[0044] After the sintering of phosphogypsum is completed, the dual-shaft motor 7 is turned on. The dual-shaft motor 7 drives the heating furnace 10 and the hollow conical grinding seat 8 to rotate through the active transmission wheel and synchronous belt. When the heating furnace 10 rotates, it drives the nut block to rotate, causing the feeding pipe 13 to move the combustion chamber 16 upward slightly, thereby separating the combustion chamber 16 from the discharge port. The phosphogypsum inside the heating furnace 10 rotates with the heating furnace 10 and collides with the stirring plate, realizing the initial crushing function of the phosphogypsum, so that the phosphogypsum changes from a large block structure to a small block structure, so that it can enter the gap between the hollow conical grinding seat 8 and the bottom of the heating furnace 10. The phosphogypsum particles that enter the gap are further ground into smaller phosphogypsum particles under the action of the grinding protrusions 14 (during this process, water is injected into the inside of the hollow conical grinding seat 8 through the water injection pipe 9 to realize the cooling function of the phosphogypsum particles).

[0045] The hollow conical grinding seat 8 rotates at high speed to generate centrifugal force, which causes the ground phosphogypsum particles to be thrown out and impact the screening screen 5. Qualified phosphogypsum particles will pass through the screening screen 5 and then be discharged through the discharge port.

[0046] Unqualified phosphogypsum is blocked and transported to the circulation port 1001 by the spiral conveyor blades 12, falling back into the heating furnace 10 for secondary grinding until it is qualified. This device can realize the sintering, grinding and cooling functions of phosphogypsum, so that multiple independent equipment do not need to cooperate with each other, and there is no need to transfer phosphogypsum between various equipment, which greatly reduces the workload of processing personnel and improves processing efficiency.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preparation apparatus of phosphogypsum as a filler, comprising a heating furnace (10) for sintering phosphogypsum, a hollow conical grinding seat (8) for grinding phosphogypsum, and a screening box (2) for screening phosphogypsum particles, characterized in that, The inner bottom end and the outer bottom end of the heating furnace (10) are conical surface structures, the bottom end of the heating furnace (10) is provided with a material leakage hole, the inner side of the heating furnace (10) is provided with a heating assembly, the outer wall of the heating furnace (10) is provided with a spiral conveying blade (12) for conveying phosphogypsum, the sidewall of the heating furnace (10) above the spiral conveying blade (12) is provided with a circulating hole (1001), the screening box (2) is rotationally arranged on the surface of the heating furnace (10), the sidewall of the screening box (2) is provided with a screening net (5) for screening phosphogypsum particles, the bottom of the screening box (2) is in a hollow structure, the hollow conical grinding seat (8) is rotationally connected to the inner wall of the screening box (2) near the bottom end, and the outer sidewall of the screening box (2) is fixedly connected with an outer peripheral box (1), and the bottom end of the outer peripheral box (1) is provided with a plurality of discharge holes. The bottom end of the hollow conical grinding seat (8) is fixedly connected with an auxiliary transmission wheel, and the surface of the heating furnace (10) near the top end is fixedly connected with an outer transmission ring (6). The bottom end of the hollow conical grinding seat (8) is fixedly connected with a water injection pipe (9) penetrating through the auxiliary transmission wheel, and the water injection pipe (9) is provided with a valve.

2. The apparatus for preparing phosphogypsum as a filler according to claim 1, characterized in that: One side of the outer peripheral box (1) is provided with a double-shaft motor (7), both sides of the double-shaft motor (7) are fixedly connected with driving transmission wheels, and the driving transmission wheels are connected with the outer transmission ring (6) and the auxiliary transmission wheel through synchronous belts.

3. The apparatus for preparing phosphogypsum as a filler according to claim 1, characterized in that: The bottom end of the heating furnace (10) is provided with a plurality of grinding protrusions (14) in contact with the surface of the hollow conical grinding seat (8), the surface of the hollow conical grinding seat (8) is fixedly connected with a material guide ring (11), the material guide ring (11) plays a guiding role on the granular phosphogypsum in an upward and oblique direction, so that the spiral conveying blade (12) realizes the conveying function of the granular phosphogypsum.

4. The apparatus for preparing phosphogypsum as a filler according to claim 1, characterized in that: The inner wall of the heating furnace (10) near the top end is fixedly connected with a nut block, the heating assembly comprises a feeding pipe (13) threadedly connected to the inner side of the nut block, a hopper (4) fixedly connected to the top end of the feeding pipe (13), and a combustion chamber (16) fixedly connected to the bottom end of the feeding pipe (13).

5. The apparatus for preparing phosphogypsum as a filler according to claim 4, characterized in that: The sidewall of the combustion chamber (16) is provided with a partition net plate, which plays a role in isolating the phosphogypsum and ensuring that the fuel in the combustion chamber (16) realizes the sintering function of the phosphogypsum; The surface of the feeding pipe (13) is fixedly connected with a plurality of stirring rods (15), the stirring rods (15) play a role in stirring and crushing the phosphogypsum, so that large pieces of phosphogypsum become small pieces of phosphogypsum, and the small pieces of phosphogypsum can enter the gap between the hollow conical grinding seat (8) and the bottom end of the heating furnace (10).

6. The apparatus for preparing phosphogypsum as a filler according to claim 5, characterized in that: The surface of the feeding pipe (13) is fixedly connected with a telescopic rod (3) through a connecting plate, and the bottom end of the telescopic rod (3) is fixedly connected with the top end of the screening box (2).

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