A device for preparing modified magnesium hydroxide by wet method and preparation method thereof

Abstract

The present application discloses an apparatus for preparing modified magnesium hydroxide by a wet process and a preparation method thereof, specifically relating to the technical field of wet mineral processing, comprising an acid leaching ore crushing mechanism and a reaction mechanism, wherein a first conveying pipe is installed on the side of the acid leaching ore crushing mechanism by bolts, a conveying end of the first conveying pipe is connected to a blending mechanism by a sealing ring, a second conveying pipe is installed on the side of the blending mechanism away from the first conveying pipe, a reaction mechanism is installed on the output end of the second conveying pipe, a horizontal centrifuge is fixedly connected to the side of the reaction mechanism by bolts, a third conveying pipe is installed at the end of the horizontal centrifuge, and a separation mechanism is installed at the output end of the third conveying pipe, the acid leaching ore crushing mechanism reduces the risk of by-products in the mother liquor after the wet reaction adhering to the particle surface, provides clean reaction raw materials for the subsequent preparation of high-purity modified magnesium hydroxide, and fundamentally solves the problem of impurities affecting product purity and causing crystal structure damage.

Description

Technical Field

[0001] The present application relates to the technical field of wet beneficiation, and more specifically, to an apparatus for preparing modified magnesium hydroxide using a wet process and a preparation method thereof. Background Art

[0002] Modified magnesium hydroxide is a functional inorganic material that optimizes the structure or improves the properties of magnesium hydroxide (Mg(OH)2) through physical, chemical, or surface modification methods. Its core goal is to overcome the limitations of magnesium hydroxide itself (such as strong hydrophilicity, poor compatibility with organic matrices, and insufficient dispersibility) and expand its application in polymer materials, environmental protection, flame retardancy, and other fields.

[0003] After searching, the existing publication number is: CN106366700B, which discloses a wet-process preparation method for magnesium hydroxide flame retardant. Low-grade brucite is used as raw material for wet purification to prepare magnesium hydroxide flame retardant. First, the brucite ore is crushed into gravel; then the gravel is placed in an overflow wheel mill for wet grinding to produce brucite slurry; then the brucite slurry is subjected to hydrocyclone sand removal and purification; then it is further purified by flotation classification with the addition of reagents; finally, the purified brucite slurry is subjected to natural sedimentation, water filtration, filter pressing, drying, and ultra-fine grinding to obtain magnesium hydroxide flame retardant of different particle sizes. The wet beneficiation process is adopted, and the process flow is coherent, so that low-grade brucite is purified and used to prepare magnesium hydroxide flame retardant, which greatly improves the resource utilization rate of brucite ore. However, during implementation, it was found that the application still has the following problems:

[0004] Currently, during the production process, impurities are introduced due to insufficient raw material purity. The mother liquor after the wet reaction contains a large amount of reaction by-products (such as NaCl). If not removed by washing, they will adhere to the surface of the particles in the form of crystalline salts, affecting the purity of the product. In addition, during the drying process, the capillary force generated by water evaporation will compress the distance between the particles. If the surface hydroxyl groups are not shielded by the modifier, hydrogen bonding will cause irreversible agglomeration. High temperature directly destroys the Mg(OH)2 crystal structure, resulting in large differences in particle size and morphology between batches.

[0005] Therefore, in order to solve the above problems, a device and a method for preparing modified magnesium hydroxide by a wet process are proposed. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides an apparatus for preparing modified magnesium hydroxide using a wet process and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned objectives, the present application provides the following technical solutions: an apparatus for preparing modified magnesium hydroxide by a wet process, comprising a crushing and acid-leaching ore mechanism and a reaction mechanism, wherein a first conveying pipe is installed on the side of the crushing and acid-leaching ore mechanism by bolts, and the conveying end of the first conveying pipe is connected to a blending mechanism by a sealing ring, a second conveying pipe is installed on the side of the blending mechanism away from the first conveying pipe, and a reaction mechanism is installed on the output end of the second conveying pipe, the side of the reaction mechanism is fixedly connected to a horizontal centrifuge by bolts, a third conveying pipe is installed at the end of the horizontal centrifuge, and a separation mechanism is installed at the output end of the third conveying pipe, the crushing and acid-leaching ore mechanism comprises a soaking zone and a precipitation mixing zone, the reaction mechanism comprises a collecting box and a mixed crystallization component, and a liquid feeding pipe is installed between the blending mechanism and the separation mechanism.

[0008] Preferably, the soaking area includes a spiral crusher and a soaking box, the soaking box is provided below the spiral crusher, the spiral crusher includes a fourth conveying pipe and a first stepper motor, and the first stepper motor is installed on the side of the fourth conveying pipe by bolts.

[0009] Preferably, the sedimentation and mixing zone includes a first connecting pipe, the side of the first connecting pipe is fixedly connected to a stirring box by bolts, a second stepper motor is installed above the stirring box, the output end of the second stepper motor is connected to a stirring rod through an umbrella gear meshing, a sedimentation box is provided on the side of the stirring box, and the top of the stirring box and the sedimentation box are connected by a second connecting pipe.

[0010] Preferably, the blending mechanism includes a fixed bracket, a first collecting box is installed between two groups of the fixed brackets, a detection component is installed on the side of the first collecting box, a first diversion pipe is installed above the detection component, the measuring instruments connected to the tube body of the first diversion pipe are respectively connected to the dispersion box, a drainage pipe is connected between the dispersion box and the first collecting box, a particle detector is installed on the outer diameter surface of the drainage pipe, and a powder supply pipe is installed on the top of the dispersion box.

[0011] Preferably, the detection component includes a first pipe, a second pipe is installed at the top of the first pipe, support brackets are installed on the outer diameter surface of the second pipe, three-way pipes are installed on the sides of the support brackets, and a measuring instrument is installed at the top of the three-way pipes.

[0012] Preferably, the reaction mechanism includes a second collecting box, a mixed crystallization component is arranged below the second collecting box, an overflow diversion box is installed at the top of the second collecting box, a drainage box is installed on the side of the overflow diversion box, a drainage pipe is installed at the top of the drainage box, a pump body is installed at the bottom end of the drainage pipe, and a liquid outlet is provided at the top of the horizontal centrifuge on one side of the pump body.

[0013] Preferably, the mixed crystallization component includes a circulation rack, and several groups of mixing tank bodies are installed between two groups of the circulation racks. A mixing double-end tube is installed on the side of the circulation rack away from the mixing tank body, and the outer diameter surface of the mixing double-end tube is sleeved with a liquid supply channel. The bottom end of the mixing double-end tube is connected to a diversion component, and the diversion component includes a diversion main pipe, and second diversion pipes are installed on the sides of the diversion main pipe. A first liquid delivery valve is installed on the side of the diversion main pipe away from the second diversion pipe, and second liquid delivery valves are installed on both sides of the diversion main pipe located on the second diversion pipe.

[0014] Preferably, the separation mechanism includes a first liquid supply box, the side of the first liquid supply box is connected to the second liquid supply box through a pipe, the bottom end of the second liquid supply box is respectively connected to a separation tank, and the side of the separation tank is connected to a liquid collection interface through a pipe.

[0015] Preferably, a processing method for preparing a device for modified magnesium hydroxide by a wet process comprises the following steps:

[0016] Step 1: First, the ore is acid-leached to generate a solution. The ore is first placed inside the spiral crusher in the crushing and acid-leaching ore mechanism. When the mineral moves along the fourth conveying pipe of the spiral crusher, the first stepper motor drives the internal spiral rod to rotate to grind the mineral. Then, the ground ore particles fall into the soaking box. At this time, the mineral in the soaking area contacts the acid solution, so that the mineral is preliminarily decomposed. Then, through the pump connected to the first connecting pipe, the acid solution in the soaking area carries the ore particles and is transported into the mixing box. Then, the second stepper motor drives the stirring rod to rotate through the bevel gear, thereby accelerating the reaction of the mineral and completing the decomposition of the mineral. After the stirring is completed, the liquid is sucked into the sedimentation box by the pump in the second connecting pipe, and the acid solution with ore is allowed to stand in the sedimentation box. After the acid solution with ore has stood in the sedimentation box, the liquid is transported to the inside of the blending mechanism through the first conveying pipe.

[0017] Step 2: The detection component provided by the blending mechanism is used to transport the mineral acid liquid transported to the interior of the first collecting box through the first pipe and conduct detection. Then the solid modifier is transported into the interior of the dispersion box through the powder supply pipe. Then the detection component transports the ethanol liquid through the first pipe to mix the solid modifier and ethanol. The mixture is mixed by the stirrer at the top. After mixing, the liquid modifier is transported to the interior of the tee pipe through the pipe on the measuring instrument and transported to the interior of the first pipe along the second pipe, thereby obtaining the liquid modifier. The liquid modifier is then tested to confirm that the drainage pipe is transported to the first collecting box and merged with the mineral acid liquid, so that a semi-mixed liquid is obtained in the first collecting box.

[0018] Step 3: The liquid modifier is transported to the first collection box through the drainage tube for preliminary mixing with the mineral acid liquid. At this time, the mineral acid liquid and the modifier cannot be fully mixed. Then, the semi-mixed modified liquid is transported to the interior of the second collection box through the second delivery tube. During the process of the liquid being collected in the second collection box, the semi-mixed liquid is pressurized and transported into the mixed crystallization component. The pressurized semi-mixed liquid is transported into the interior of the mixing double-end pipe through the liquid supply channel. Then, one side of the valve body on both sides of the mixing double-end pipe is closed, and the semi-mixed liquid is transported into the interior of the mixing tank body through the circulation rack. During the process of the semi-mixed liquid circulating in the mixing tank body, it is fully mixed.

[0019] Step 4: The mixed liquid is crystallized and the liquid is separated into solid and liquid by a horizontal centrifuge. The water-containing filter cake is mixed with water in the first liquid supply tank and continues to be transported into the interior of the second liquid supply tank. The water-containing filter cake is then slurried and washed through a separation tank to obtain a water-containing filter cake, which is then heated to obtain a powder.

[0020] The technical effects and advantages of this application are:

[0021] 1. Compared with the prior art, the crushing and acid leaching ore mechanism of the present application adopts a multi-stage treatment process of acid leaching after grinding and precipitation after stirring. The mineral is finely crushed by a spiral crusher and fully contacted with the acid solution. The reaction is accelerated in the mixing box to remove impurities in the mineral, and then the undissolved solid impurities are separated by the precipitation box, thereby reducing the impurity content in the raw material from the source, thereby avoiding the problem of impurities introduced into the mineral due to insufficient raw material purity, reducing the risk of by-products in the mother liquor after the wet reaction adhering to the particle surface, and providing clean reaction raw materials for the subsequent preparation of high-purity modified magnesium hydroxide, fundamentally solving the problem of impurities affecting product purity and causing crystal structure destruction.

[0022] 2. Compared with the prior art, the blending mechanism of the present application performs real-time regulation of the modifier at each stage by performing dispersion modification, which can achieve the problem of insufficient mixing at a certain stage during the mixing process of the modifier and the acid extract, fundamentally solving the problem of particle agglomeration caused by uneven dispersion of the modifier in the prior art. The acid extract composition is monitored in real time by the detection component, and the solid modifier is simultaneously fully mixed with ethanol in the dispersion box to form uniform droplets, which are then merged with the acid extract through the drainage tube. This can avoid irreversible agglomeration caused by hydrogen bonding during the drying process, and ensure that the modifier evenly wraps the particles, thereby improving the product dispersibility and crystal structure stability from the source and reducing the large differences in particle size and morphology between batches.

[0023] 3. Compared with the prior art, the reaction mechanism of the present application uniformly reacts the modifier and the acid leaching solution, reducing uneven crystal growth, and constructs a closed flow channel through the circulation rack and the mixing tank of the mixed crystallization component, so that the pressurized liquid is forced to circulate under a turbulent state, ensuring that the modifier molecules and magnesium ions collide and react uniformly in the dynamic flow. At the same time, the flow rate and pressure are precisely controlled by the diversion component, so that the crystals can grow in a direction in a mild environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the crushing and acid leaching ore mechanism of this application;

[0026] Figure 3 This is a schematic side cross-sectional view of the structure of the crushing and acid leaching ore mechanism of the present application;

[0027] Figure 4 This is a schematic structural diagram of the blending mechanism of this application;

[0028] Figure 5 This is a schematic diagram of the structure of the detection component of this application;

[0029] Figure 6 Schematic diagram of the structure of the reaction mechanism of this application;

[0030] Figure 7 This is a schematic structural diagram of the hybrid crystallization component of the present application;

[0031] Figure 8 This is a schematic structural diagram of the diversion component of this application;

[0032] Figure 9 This is a schematic structural diagram of the horizontal centrifuge of this application.

[0033] The accompanying drawings are marked as follows: 1. crushing acid leaching ore mechanism; 2. first conveying pipe; 3. blending mechanism; 4. second conveying pipe; 5. reaction mechanism; 6. third conveying pipe; 7. horizontal centrifuge; 8. separation mechanism; 9. liquid feeding pipe; 10. soaking zone; 11. precipitation and mixing zone; 12. spiral crusher; 13. fourth conveying pipe; 14. first stepper motor; 15. soaking tank; 16. first connecting pipe; 17. stirring tank; 18. second stepper motor; 19. second connecting pipe; 20. precipitation tank; 21. fixing bracket; 22. first collecting box; 23. detection component; 2301. first pipeline; 2302. second pipeline; 2303. support bracket; 230 4. Tee pipe; 2305. Measuring instrument; 24. First diversion pipe; 25. Dispersion box; 26. Drainage pipe; 27. Particle detector; 28. Powder supply pipe; 29. ​​Second collection box; 30. Mixing crystallization component; 31. Overflow diversion box; 32. Drain box; 33. Drain pipe; 34. Pump body; 35. Liquid outlet; 36. Circulation rack; 37. Mixing tank body; 38. Mixing double-ended pipe; 39. Liquid supply channel; 40. Diversion component; 4001. Diversion main pipe; 4002. Second diversion pipe; 4003. First liquid delivery valve; 4004. Second liquid delivery valve; 41. First liquid supply box; 42. Second liquid supply box; 43. Separation tank; 44. Liquid collection interface. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Example

[0036] As attached Figures 1 to 9 The device shown is a device for preparing modified magnesium hydroxide by a wet process, comprising a crushing and acid-leaching ore mechanism 1 and a reaction mechanism 5. The side of the crushing and acid-leaching ore mechanism 1 is installed with a first conveying pipe 2 by bolts, and the conveying end of the first conveying pipe 2 is connected to the blending mechanism 3 by a sealing ring. A second conveying pipe 4 is installed on the side of the blending mechanism 3 away from the first conveying pipe 2, and a reaction mechanism 5 is installed at the output end of the second conveying pipe 4. The side of the reaction mechanism 5 is fixedly connected with a horizontal centrifuge 7 by bolts, and a third conveying pipe 6 is installed at the end of the horizontal centrifuge 7. A separation mechanism 8 is installed at the output end of the third conveying pipe 6. The crushing and acid-leaching ore mechanism 1 includes a soaking area 10 and a precipitation mixing area 11, and the reaction mechanism 5 includes a collecting box and a mixing crystallization component 30.

[0037] As a preferred embodiment, the soaking area 10 includes a spiral crusher 12 and a soaking box 15. The soaking box 15 is provided below the spiral crusher 12 for crushing and acid leaching pretreatment of minerals, providing acid leaching liquid that meets the particle size requirements for subsequent reactions. The soaking area 10 is an area for realizing preliminary crushing and acid leaching reaction of minerals, and cooperates with the spiral crusher 12 to drive the spiral rod to rotate and grind the minerals, so that the minerals move along the fourth conveying pipe 13 and are ground to a suitable particle size. Then the soaking box 15 receives the ground mineral particles, contacts with the acid solution to complete preliminary decomposition, and provides raw materials for subsequent stirring reactions. After the minerals are initially decomposed, the liquid enters the precipitation mixing area 11 and promotes the complete acid leaching reaction and precipitates impurities, so that the impurities in the liquid are deposited at the bottom for extraction, thereby reducing the content of impurities in the conveying liquid. The spiral crusher 12 includes a fourth conveying pipe 13 and a first stepper motor 14. The side of the fourth conveying pipe 13 is equipped with the first stepper motor 14 by bolts.

[0038] As a preferred embodiment, the precipitation and mixing zone 11 includes a first connecting pipe 16, the side of the first connecting pipe 16 is fixedly connected to the stirring box 17 by bolts, and a second stepper motor 18 is installed above the stirring box 17. The first connecting pipe 16 is connected to the soaking zone 10 and the stirring box 17, and the acid leaching liquid and the mineral particles are transported by a pump. When the liquid is transported to the interior of the stirring box 17, the stirring rod installed inside it is connected, and the output end of the second stepper motor 18 is connected to the stirring rod through a bevel gear. A sedimentation tank 20 is provided on the side of the stirring box 17, which is driven by the second stepper motor 18 through the bevel gear to accelerate the mineral decomposition reaction, and the sedimentation tank 20 receives the stirred liquid through the second connecting pipe 19, and stands to allow impurities to precipitate, thereby improving the purity of the acid leaching liquid. The top of the stirring box 17 and the sedimentation tank 20 are connected to the second connecting pipe 19, and a liquid feeding pipe 9 is installed between the blending mechanism 3 and the separation mechanism 8.

[0039] As a preferred embodiment, the blending mechanism 3 includes a fixed bracket 21, a first collecting box 22 is installed between two groups of fixed brackets 21, and a detection component 23 is installed on the side of the first collecting box 22, in which the acid leaching liquid and the modifier are mixed and detected to ensure that the modifier is evenly dispersed. The fixed bracket 21 is provided to support the first collecting box 22 to ensure the stability of the mechanism, and the first collecting box 22 is provided to store the mineral acid to provide raw materials for subsequent mixing. A first diversion pipe 24 is installed above the detection component 23, and the measuring instrument 2305 connected to the pipe body of the first diversion pipe 24 is respectively connected to the dispersion box 25. A drainage pipe 26 is connected between the dispersion box 25 and the first collecting box 22, and a particle detector 27 is installed on the outer diameter surface of the drainage pipe 26. A powder supply pipe 28 is installed on the top of the dispersion box 25 to transport the mixed modifier to the acid leaching liquid. The particle size is monitored in real time by the particle detector 27 on the outside to ensure the mixing effect.

[0040] As a preferred embodiment, the detection component 23 includes a first pipe 2301, a second pipe 2302 is installed on the top of the first pipe 2301, and a support bracket 2303 is installed on the outer diameter surface of the second pipe 2302. Then the first pipe 2301 in the detection component 23 conveys the mineral acid to the detection end to facilitate real-time monitoring of the liquid composition, and the second pipe 2302 is connected to the tee pipe 2304 to convey the liquid modifier to the mixing path and cooperate with the measuring instrument 2305, which is installed on the top of the tee pipe 2304 to control the amount of modifier added to ensure the mixing. The modifier receives the solid modifier through the powder supply pipe 28 in the dispersion box 25 and mixes with ethanol to form a liquid modifier. The top stirrer ensures uniform dispersion and connects the dispersion box 25 and the first collection box 22 through the drainage pipe 26. The sides of the support bracket 2303 are respectively installed with three-way pipes 2304, and the top of the three-way pipe 2304 is installed with a measuring instrument 2305, wherein the detection probe of the measuring instrument 2305 is arranged inside the set pipeline. When the liquid moves along the pipeline, the probe detects the liquid. The model of the measuring instrument 2305 is Mastersizer 3000.

[0041] As a preferred embodiment, the reaction mechanism 5 includes a second collecting box 29, and a mixed crystallization component 30 is arranged below the second collecting box 29. The second collecting box 29 collects semi-mixed liquid and provides a buffer space for deep mixing. An overflow diversion box 31 is installed on the top of the second collecting box 29, and a drainage box 32 is installed on the side of the overflow diversion box 31. A drainage pipe 33 is installed on the top of the drainage box 32, and a pump body 34 is installed at the bottom end of the drainage pipe 33. The top of the horizontal centrifuge 7 is located on one side of the pump body 34 and is provided with a liquid outlet 35.

[0042] As a preferred embodiment, the hybrid crystallization component 30 includes a circulation rack 36, and several groups of mixing tank bodies 37 are installed between two groups of circulation racks 36. A mixing double-ended tube 38 is installed on the side of the circulation rack 36 away from the mixing tank body 37. The circulation rack 36 in the hybrid crystallization component 30 supports the mixing tank body 37, and the internal channel forms a liquid circulation path. Then the mixing tank body 37 promotes liquid turbulence, so that the modifier and the acid leaching liquid are fully mixed and crystal growth is induced. The outer diameter surface of the mixing double-ended tube 38 is provided with a liquid supply channel 39, and the mixing double-ended tube 38 cooperates with the liquid supply channel 39 to adjust the liquid flow direction by controlling the first liquid supply valve 4003 and the second liquid supply valve 4004, so that the liquid moves in the set mixing tank body 37. The liquid circulates fully to ensure uniform mixing, and then the diversion component 40 distributes the pressurized liquid evenly to each mixing tank 37 through the second diversion pipe 4002 on the diversion main pipe 4001 to optimize the crystallization efficiency. At this time, the overflow diversion box 31 collects the liquid overflowing from the second collection box 29, and discharges the excess mother liquor through the drain box 32 and the drain pipe 33 to maintain the stability of the reaction liquid level. The bottom end of the mixing double-ended pipe 38 is connected to the diversion component 40 including the diversion main pipe 4001, and the side of the diversion main pipe 4001 is installed with a second diversion pipe 4002, and the side of the diversion main pipe 4001 away from the second diversion pipe 4002 is installed with a first liquid delivery valve 4003, and the diversion main pipe 4001 is located on both sides of the second diversion pipe 4002 and a second liquid delivery valve 4004 is installed.

[0043] As a preferred embodiment, the separation mechanism 8 includes a first liquid supply tank 41, the side of the first liquid supply tank 41 is connected to the second liquid supply tank 42 through a pipe, and the bottom end of the second liquid supply tank 42 is respectively connected to a separation tank 43. The horizontal centrifuge 7 performs solid-liquid separation on the liquid after crystallization through high-speed rotation, and the mother liquor is discharged from the liquid outlet 35. The solid filter cake is transported to the separation mechanism 8 by the third conveying pipe 6, and then the first liquid supply tank 41 and the second liquid supply tank 42 wash and pulp the water-containing filter cake in turn to remove impurities remaining inside the cake body, and transport the cake liquid to the interior of the separation tank 43, and wash the filter cake slurry, and recover the washing liquid through the liquid collection interface 44 to improve the product purity. The side of the separation tank 43 is connected to the liquid collection interface 44 through a pipe, and then the first conveying pipe 2, the second conveying pipe 4 and the third conveying pipe 6 are connected with a sealing ring to ensure that there is no leakage during liquid transportation and maintain the system pressure stable.

[0044] The working process of the present application is as follows: first, the ore is acid-leached to generate a solution. At this time, the ore is first placed in the spiral crusher 12 in the crushing and acid-leaching ore mechanism 1. At this time, when the mineral moves along the fourth conveying pipe 13 of the spiral crusher 12, the first stepper motor 14 drives the internal spiral rod to rotate to grind the mineral, and then the ground ore particles fall into the soaking box 15. At this time, the mineral in the soaking area 10 contacts the acid solution and causes the mineral to be preliminarily decomposed. Then, through the pump connected to the first connecting pipe 16, the acid solution in the soaking area 10 carries the ore particles and is transported into the mixing box 17. Then, the second stepper motor 18 drives the stirring rod to rotate through the bevel gear, thereby accelerating the reaction of the mineral and completing the decomposition of the mineral. After the stirring is completed, the liquid is sucked in and transported to the inside of the sedimentation box 20 through the pump in the second connecting pipe 19, and the acid solution with ore is allowed to stand in the sedimentation box 20. After the acid solution with ore completes standing in the sedimentation box 20, the liquid is transported to the inside of the blending mechanism 3 through the first conveying pipe 2;

[0045] The detection component 23 provided in the blending mechanism 3 is used to transport the mineral acid liquid transported to the interior of the first collection box 22 out through the first pipe 2301 and perform detection. Then, the solid modifier is transported into the interior of the dispersion box 25 through the powder supply pipe 28. Then, the detection component 23 transports ethanol liquid through the first pipe 2301 to mix the solid modifier and ethanol. The mixture is mixed by the stirrer at the top. After mixing, the liquid modifier is transported to the interior of the tee pipe 2304 through the pipe on the measuring instrument 2305, and transported to the interior of the first pipe 2301 along the second pipe 2302, thereby obtaining the liquid modifier. The liquid modifier is then tested to confirm that it is transported to the first collection box 22 by the drainage pipe 26 and merged with the mineral acid liquid, so that a semi-mixed liquid is obtained in the first collection box 22.

[0046] The liquid modifier is transported to the first collection box 22 through the drainage pipe 26 for preliminary mixing with the mineral acid liquid. At this time, the mineral acid liquid and the modifier cannot be fully mixed. Then, the semi-mixed modified liquid is transported to the interior of the second collection box 29 through the second delivery pipe 4. During the collection of the liquid in the second collection box 29, the semi-mixed liquid is pressurized and transported into the mixed crystallization component 30. At this time, the pressurized semi-mixed liquid is transported into the interior of the mixing double-end pipe 38 through the liquid supply channel 39. Then, one side of the valve body on both sides of the mixing double-end pipe 38 is closed, and the semi-mixed liquid is transported into the interior of the mixing tank body 37 through the circulation rack 36. At this time, the semi-mixed liquid is circulated in the mixing tank body 37 because the mixing tank body 37 is provided with a baffle to disturb the liquid and fully mix it, so that the unmixed liquid inside the semi-mixed liquid is fully mixed during the flow process.

[0047] The mixed liquid is crystallized and the liquid is separated into solid and liquid by a horizontal centrifuge 7. Then, the water-containing filter cake is mixed with water in the first liquid supply tank 41 and continues to be transported into the interior of the second liquid supply tank 42. The water-containing filter cake is then slurried and washed by a separation tank 43 to obtain a water-containing filter cake, which is then heated to obtain a powder. The above is the working principle of the device for preparing modified magnesium hydroxide by a wet method and the preparation method thereof.

Claims

1. An apparatus for preparing modified magnesium hydroxide by a wet process, comprising a crushing and acid leaching ore mechanism (1) and a reaction mechanism (5), characterized in that: The side of the crushing acid leaching ore mechanism (1) is fixed with a first conveying pipe (2) by bolts, the conveying end of the first conveying pipe (2) is connected to a blending mechanism (3) by a sealing ring, the side of the blending mechanism (3) away from the first conveying pipe (2) is fixed with a second conveying pipe (4), the output end of the second conveying pipe (4) is installed with a reaction mechanism (5), the side of the reaction mechanism (5) is fixedly connected with a horizontal centrifuge (7) by bolts, the end of the horizontal centrifuge (7) is fixed with a third conveying pipe (6), the output end of the third conveying pipe (6) is installed with a separation mechanism (8), the crushing acid leaching ore mechanism (1) comprises a soaking zone (10) and a precipitation mixing zone (11), the reaction mechanism (5) comprises a collecting box and a mixing crystallization component (30), the A liquid feeding pipe (9) is installed between the blending mechanism (3) and the separation mechanism (8), the blending mechanism (3) includes a fixed bracket (21), a first collecting box (22) is installed between two groups of the fixed brackets (21), a detection component (23) is installed on the side of the first collecting box (22), a first diversion pipe (24) is installed above the detection component (23), the measuring instrument (2305) provided on the pipe body of the first diversion pipe (24) is connected to the dispersion box (25), a drainage pipe (26) is connected between the dispersion box (25) and the first collecting box (22), a particle detector (27) is installed on the outer diameter surface of the drainage pipe (26), and a powder supply pipe (28) is installed on the top of the dispersion box (25); The detection component (23) includes a first pipe (2301), a second pipe (2302) is installed at the top end of the first pipe (2301), a support bracket (2303) is installed on the outer diameter surface of the second pipe (2302), a tee pipe (2304) is installed on the side of the support bracket (2303), and a measuring instrument (2305) is installed at the top end of the tee pipe (2304).

2. A device for preparing modified magnesium hydroxide by a wet process according to claim 1, characterized in that: The soaking zone (10) includes a spiral crusher (12) and a soaking box (15). The soaking box (15) is provided below the spiral crusher (12). The spiral crusher (12) includes a fourth conveying pipe (13) and a first stepper motor (14). The first stepper motor (14) is mounted on the side of the fourth conveying pipe (13) via bolts.

3. A device for preparing modified magnesium hydroxide by a wet process according to claim 1, characterized in that: The sedimentation and mixing zone (11) includes a first connecting pipe (16), the side of the first connecting pipe (16) is fixedly connected to a stirring box (17) by bolts, a second stepper motor (18) is installed above the stirring box (17), the output end of the second stepper motor (18) is connected to a stirring rod through an umbrella gear meshing, a sedimentation box (20) is provided on the side of the stirring box (17), and the top ends of the stirring box (17) and the sedimentation box (20) are connected to the second connecting pipe (19).

4. The device for preparing modified magnesium hydroxide by a wet process according to claim 1, wherein: The reaction mechanism (5) includes a second collecting box (29), a mixed crystallization assembly (30) is provided below the second collecting box (29), an overflow diversion box (31) is installed at the top of the second collecting box (29), a drainage box (32) is installed on the side of the overflow diversion box (31), a drainage pipe (33) is installed at the top of the drainage box (32), a pump body (34) is installed at the bottom of the drainage pipe (33), and a liquid outlet (35) is provided at the top of the horizontal centrifuge (7) on one side of the pump body (34).

5. The device for preparing modified magnesium hydroxide by a wet process according to claim 1, wherein: The mixed crystallization component (30) includes a circulation rack (36), and several groups of mixing tank bodies (37) are installed between two groups of the circulation racks (36). A mixing double-end pipe (38) is installed on the side of the circulation rack (36) away from the mixing tank body (37). The outer diameter surface of the mixing double-end pipe (38) is provided with a liquid supply channel (39). The bottom end of the mixing double-end pipe (38) is connected to a diversion component (40), and the diversion component (40) includes a diversion main pipe (4001). The side of the diversion main pipe (4001) is installed with a second diversion pipe (4002), the side of the diversion main pipe (4001) is installed with a first liquid supply valve (4003), and the diversion main pipe (4001) is installed with a second liquid supply valve (4004) on both sides of the second diversion pipe (4002).

6. The device for preparing modified magnesium hydroxide by a wet process according to claim 5, wherein: The separation mechanism (8) comprises a first liquid supply box (41), the side of the first liquid supply box (41) is connected to a second liquid supply box (42) via a pipeline, the bottom end of the second liquid supply box (42) is respectively connected to a separation tank (43), and the side of the separation tank (43) is connected to a liquid collection interface (44) via a pipeline.

7. A method for preparing modified magnesium hydroxide by a wet process, applying the device for preparing modified magnesium hydroxide by a wet process according to any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: Step 1: First, acid-leach the ore to generate a solution. First, place the ore inside the spiral crusher (12) in the crushing acid-leaching ore mechanism (1). When the ore moves along the fourth conveying pipe (13) of the spiral crusher (12), the first stepper motor (14) drives the internal spiral rod to rotate to grind the ore. Then, the ground ore particles fall into the inside of the soaking box (15). At this time, the ore in the soaking area (10) contacts the acid solution, causing the ore to be initially decomposed. Then, the pump connected to the first connecting pipe (16) is used to pump the ore in the soaking area (10). The acid liquid in the soaking zone (10) carries the mineral particles and is transported into the interior of the stirring box (17). Then, the second stepper motor (18) drives the stirring rod to rotate through the bevel gear, thereby accelerating the reaction of the mineral and completing the decomposition of the mineral. After the stirring is completed, the liquid is sucked into the interior of the sedimentation box (20) through the pump in the second connecting pipe (19), and is transported to the interior of the sedimentation box (20). The acid liquid carrying the mineral is allowed to stand in the sedimentation box (20). After the acid liquid carrying the mineral has stood in the sedimentation box (20), the liquid is transported to the interior of the blending mechanism (3) through the first delivery pipe (2); Step 2: The detection component (23) provided in the blending mechanism (3) is used to transport the mineral acid liquid transported to the inside of the first collecting box (22) through the first pipe (2301) and perform detection. Then, the solid modifier is transported into the inside of the dispersion box (25) through the powder supply pipe (28). Then, the detection component (23) transports the ethanol liquid through the first pipe (2301) so that the solid modifier and the ethanol are mixed. The mixture is mixed by the stirrer at the top. After mixing, the liquid modifier is transported to the inside of the tee pipe (2304) through the pipe on the measuring instrument (2305) and transported to the inside of the first pipe (2301) along the second pipe (2302), thereby obtaining the liquid modifier. The liquid modifier is then tested to confirm that the liquid modifier is transported to the first collecting box (22) by the drainage pipe (26) and merged with the mineral acid liquid, so that a semi-mixed liquid is obtained in the first collecting box (22). Step 3: The liquid modifier is transported to the first collecting box (22) through the drainage pipe (26) to be preliminarily mixed with the mineral acid liquid. At this time, the mineral acid liquid and the liquid modifier cannot be fully mixed. Then, the semi-mixed modified liquid is transported to the interior of the second collecting box (29) through the second transport pipe (4). During the process of collecting the semi-mixed liquid in the second collecting box (29), the semi-mixed liquid is pressurized and transported into the mixed crystallization component (30). The pressurized semi-mixed liquid is transported into the interior of the mixing double-end pipe (38) through the liquid supply channel (39). Then, one side of the valve body on both sides of the mixing double-end pipe (38) is closed, and the semi-mixed liquid is transported into the interior of the mixing tank body (37) through the circulation rack (36). During the process of circulating the semi-mixed liquid in the mixing tank body (37), it is fully mixed. Step 4: Complete the crystallization of the mixed liquid and make the liquid pass through the horizontal centrifuge (7) for solid-liquid separation. Then, the water-containing filter cake is mixed with water in the first liquid supply tank (41) and continuously transported into the interior of the second liquid supply tank (42). Then, the water-containing filter cake is slurried and washed through the separation tank (43) to obtain the water-containing filter cake, which is then heated to obtain the powder.

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