Equipment for preparing modified magnesium hydroxide by using wet method and preparation method thereof

Abstract

The invention discloses equipment for preparing modified magnesium hydroxide through a wet method and a preparation method of the equipment, and particularly relates to the technical field of wet beneficiation. The equipment comprises an acid ore crushing and leaching mechanism and a reaction mechanism, and the side edge of the acid ore crushing and leaching mechanism is provided with a first conveying pipe through a bolt; the conveying end of the first conveying pipe is connected with a blending mechanism through a sealing ring, a second conveying pipe is installed on the side, away from the first conveying pipe, of the blending mechanism, a reaction mechanism is installed at the output end of the second conveying pipe, and the side edge of the reaction mechanism is fixedly connected with a horizontal centrifugal machine through bolts; a third conveying pipe is installed at the tail end of the horizontal centrifugal machine, a separation mechanism is installed at the output end of the third conveying pipe, the risk that by-products in mother liquor are attached to the surfaces of particles after wet reaction is reduced through the acid leaching ore crushing mechanism, and clean reaction raw materials are provided for subsequent preparation of high-purity modified magnesium hydroxide; and the problems that impurities influence the product purity and cause crystal structure damage are fundamentally solved.

Description

Technical Field

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

[0002] Modified magnesium hydroxide is a functional inorganic material obtained by optimizing the structure or improving the performance of magnesium hydroxide (Mg(OH)₂) through physical, chemical, or surface modification methods. The core objective is to overcome the limitations of magnesium hydroxide itself (such as strong hydrophilicity, poor compatibility with organic matrices, insufficient dispersibility, etc.), and to expand its applications in polymer materials, environmental protection, flame retardancy, etc. After retrieval, the existing publication number: CN106366700B discloses a wet preparation method of magnesium hydroxide flame retardant. Using low-grade brucite as raw material, it is wet purified to prepare magnesium hydroxide flame retardant. First, the raw brucite ore is crushed into gravel; then the gravel is put into an overflow type wheel mill for wet grinding to make brucite slurry; then the brucite slurry is desanded and purified by a hydrocyclone; then reagents are added for flotation and classification for further purification; finally, after natural precipitation, water filtration, pressure filtration, drying, and ultrafine grinding of the purified brucite slurry, magnesium hydroxide flame retardants with different particle sizes are prepared. The wet beneficiation process has a continuous process flow, enabling the purification of low-grade brucite and the preparation of magnesium hydroxide flame retardant, greatly improving the resource utilization rate of brucite ore. However, the following problems are found in the implementation: In the existing production process, due to insufficient raw material purity, impurities are introduced. A large amount of reaction by-products (such as NaCl) are contained in the mother liquor after the wet reaction. If not removed by washing, they will adhere to the particle surface in the form of crystalline salts, affecting the product purity. Moreover, during the drying process, the capillary force generated by water evaporation will compress the distance between particles. If the surface hydroxyl groups are not shielded by the modifier, hydrogen bonding will cause irreversible agglomeration; high temperature will directly damage the crystal structure of Mg(OH)₂, resulting in large differences in particle size and morphology between batches of products. Therefore, in view of the above problems, an apparatus for preparing modified magnesium hydroxide by a wet method and a preparation method thereof are proposed. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides an apparatus for preparing modified magnesium hydroxide by a wet method and a preparation method thereof to solve the problems raised in the above background art.

[0004] To achieve the above object, the present application provides the following technical solution: An apparatus for preparing modified magnesium hydroxide by a wet method, comprising a crushing and acid leaching ore mechanism and a reaction mechanism. A first conveying pipe is installed on the side of the crushing and acid leaching ore mechanism through bolts. The conveying end of the first conveying pipe is connected to a blending mechanism through a sealing ring. A second conveying pipe is installed on the side of the blending mechanism away from the first conveying pipe. The output end of the second conveying pipe is installed with a reaction mechanism. A horizontal centrifuge is fixedly connected to the side of the reaction mechanism through bolts. A third conveying pipe is installed at the end of the horizontal centrifuge. The output end of the third conveying pipe is installed with a separation mechanism. The crushing and acid leaching ore mechanism includes a soaking area and a precipitation mixing area. The reaction mechanism includes a collection box and a mixing and crystal forming component. A liquid supply pipe is installed between the blending mechanism and the separation mechanism.

[0005] Preferably, the soaking area includes a spiral crusher and a soaking tank. The soaking tank is arranged below the spiral crusher. The spiral crusher includes a fourth conveying pipe and a first stepping motor. The first stepping motor is installed on the side of the fourth conveying pipe through bolts.

[0006] Preferably, the precipitation mixing area includes a first connecting pipe. A stirring tank is fixedly connected to the side of the first connecting pipe through bolts. A second stepping motor is installed above the stirring tank. The output end of the second stepping motor is meshed and connected with a stirring rod through a bevel gear. A precipitation tank is arranged on the side of the stirring tank. The tops of the stirring tank and the precipitation tank are connected and communicated by a second connecting pipe.

[0007] Preferably, the blending mechanism includes a fixed bracket. A first collection box is installed between the two fixed brackets. A detection component is installed on the side of the first collection box. A first shunt pipe is installed above the detection component. Measuring instruments communicated with the pipe body of the first shunt pipe are respectively connected to dispersion boxes. A diversion pipe is connected and communicated between the dispersion box and the first collection box. Particle detectors are installed on the outer diameter surface of the diversion pipe. Powder supply pipes are installed on the tops of the dispersion boxes.

[0008] 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 respectively installed on the sides of the support brackets. Measuring instruments are installed on the tops of the three-way pipes.

[0009] Preferably, the reaction mechanism includes a second collection box. A mixing and crystal forming component is arranged below the second collection box. An overflow shunt box is installed at the top of the second collection box. A drain box is installed on the side of the overflow shunt box. A drain pipe is installed at the top of the drain box. A pump body is installed at the bottom of the drain pipe. An outlet is arranged on the top of the horizontal centrifuge on one side of the pump body.

[0010] Preferably, the mixed crystallization assembly includes a circulation rack, and a number of mixing tanks are installed between the two circulation racks. A mixing double-end pipe is installed on one side of the circulation rack away from the mixing tank. A liquid supply channel is sleeved on the outer diameter surface of the mixing double-end pipe. The bottom end of the mixing double-end pipe is connected and communicated with a shunt assembly. The shunt assembly includes a shunt main pipe. Second shunt pipes are installed on the sides of the shunt main pipe. A first liquid supply valve is installed on one side of the shunt main pipe away from the second shunt pipe. Second liquid supply valves are installed on both sides of the shunt main pipe where the second shunt pipes are located.

[0011] Preferably, the separation mechanism includes a first liquid supply tank. A second liquid supply tank is connected to the side of the first liquid supply tank through a pipeline. Separation tanks are respectively connected to the bottom ends of the second liquid supply tanks. A liquid collecting interface is connected to the side of the separation tank through a pipeline.

[0012] Preferably, a processing method of an apparatus for preparing modified magnesium hydroxide by a wet method, the processing method includes the following steps: Step 1: First, acid-leach the ore to generate a solution. First, put the ore into the interior of the spiral pulverizer in the crushing and acid-leaching ore mechanism. During the process of the ore moving along the fourth conveying pipe of the spiral pulverizer, the first stepping motor drives the internal spiral rod to rotate to grind the ore. Then the ground ore particles fall into the interior of the soaking tank. At this time, the ore in the soaking area comes into contact with the acid solution, causing the ore to decompose preliminarily. Then, through the pump connected to the first connecting pipe, the acid solution in the soaking area carrying the ore particles is transported into the interior of the mixing tank. Then the second stepping motor drives the stirring rod to rotate through the bevel gear, thereby accelerating the reaction of the ore, completing the decomposition of the ore. After the stirring is completed, at this time, the liquid is sucked and transported into the interior of the precipitation tank through the pump in the second connecting pipe, and the ore-containing acid solution is allowed to stand in the precipitation tank. After the ore-containing acid solution is allowed to stand in the precipitation tank, at this time, the liquid is transported into the interior of the co-mixing mechanism through the first conveying pipe; Step 2: Then, the detection assembly provided in the co-mixing mechanism is used to transport the ore-containing acid solution transported into the first collection box, and transport it out through the first pipeline and conduct detection. Then, the solid modifier is transported into the interior of the dispersion box through the powder supply pipe. Then, the detection assembly transports ethanol liquid through the first pipeline, and the solid modifier is mixed with ethanol, and is mixed by the mixer at the top. Then, after the mixing, at this time, the liquid modifier is transported into the interior of the three-way pipe through the pipeline on the measuring instrument and transported into the interior of the first pipeline along the second pipeline, thereby obtaining the liquid modifier and conducting detection. After confirming that the liquid is transported into the first collection box through the diversion pipe and fused with the ore-containing acid solution, a semi-mixed liquid is obtained in the first collection box; Step 3: Then, the semi-mixed liquid modifier is transported through a drainage pipe into the second collection tank for preliminary mixing with the ore-bearing acid solution. At this time, the ore-bearing acid solution and the modifier cannot be fully mixed. Then, the semi-mixed modified liquid is transported into the interior of the second collection tank through a second delivery pipe. During the process of liquid collection in the second collection tank, the semi-mixed liquid is pressurized and transported into the mixing and crystallization assembly. The pressurized semi-mixed liquid is transported into the interior of the mixing double-end pipe through a 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 through a circulation rack. During the process of the semi-mixed liquid flowing in the mixing tank, it is fully mixed; Step 4: Then, the mixed liquid crystallizes, and the liquid is subjected to solid-liquid separation by a horizontal centrifuge. Then, the obtained water-containing filter cake is mixed with water in the first liquid supply tank and continuously transported into the interior of the second liquid supply tank. Then, the water-containing filter cake becomes a slurry and is washed through a separation tank to obtain a water-containing filter cake, and then is heated to obtain a powder.

[0013] The technical effects and advantages of this application: 1. Compared with the prior art, the crushing and acid-leaching ore mechanism of this application adopts a multi-stage treatment process of acid leaching after grinding and precipitation after stirring. The ore is finely crushed by a spiral crusher and then comes into full contact with the acid solution. The reaction is accelerated in the stirring tank to strip the impurities in the ore, and then the undissolved solid impurities are separated through the precipitation tank, reducing the impurity content in the raw materials from the source, thus avoiding the problem of impurity introduction caused by insufficient raw material purity in the ore, reducing the risk of by-products in the mother liquor adhering to the particle surface after the wet reaction, providing a clean reaction raw material for the subsequent preparation of high-purity modified magnesium hydroxide, and fundamentally solving the problems of impurities affecting product purity and causing crystal structure damage.

[0014] 2. Compared with the prior art, the blending mechanism of this application can realize real-time regulation of the modifier at each stage by performing dispersion modification. During the mixing process of the modifier and the acid-leaching solution, if there is a problem of insufficient mixing at a certain stage, it can fundamentally solve the problem of particle agglomeration caused by uneven dispersion of the modifier in the prior art. By detecting the components of the acid-leaching solution in real time with a detection component, the solid modifier is fully mixed with ethanol in the dispersion tank to form uniform liquid droplets, and then fused with the acid-leaching solution through a drainage pipe, which can avoid irreversible agglomeration caused by hydrogen bond action during the drying process, and at the same time ensure that the modifier uniformly wraps the particles, improving the product dispersion and crystal structure stability from the source, and reducing the large difference in particle size and morphology between batches.

[0015] 3. Compared with the prior art, the reaction mechanism of the present application enables the modifier and the acid leaching solution to react uniformly, reduces uneven crystal growth, and constructs a closed flow channel through the circulation frame of the mixing and crystallization assembly and the mixing tank body, forcing the pressurized liquid to circulate under turbulent flow conditions to ensure that the modifier molecules and magnesium ions collide and react uniformly in the dynamic flow. At the same time, the flow rate and pressure can be precisely regulated through the shunt assembly, enabling the crystals to grow directionally in a mild environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the structure of the crushing and acid leaching ore mechanism of the present application; Figure 3 is a schematic diagram of the side sectional structure of the crushing and acid leaching ore mechanism of the present application; Figure 4 is a schematic diagram of the structure of the blending mechanism of the present application; Figure 5 is a schematic diagram of the structure of the detection component of the present application; Figure 6 is a schematic diagram of the structure of the reaction mechanism of the present application; Figure 7 is a schematic diagram of the structure of the mixing and crystallization assembly of the present application; Figure 8 is a schematic diagram of the structure of the shunt assembly of the present application; Figure 9 is a schematic diagram of the structure of the horizontal centrifuge of the present application.

[0017] The reference numerals are: 1, crushing and 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 supply pipe; 10, soaking area; 11, precipitation mixing area; 12, spiral crusher; 13, fourth conveying pipe; 14, first stepping motor; 15, soaking tank; 16, first connecting pipe; 17, stirring tank; 18, second stepping motor; 19, second connecting pipe; 20, precipitation tank; 21, fixing bracket; 22, first collection box; 23, detection component; 2301, first pipeline; 2302, second pipeline; 2303, support bracket; 2304, three-way pipe; 2305, measuring instrument; 24, first shunt pipe; 25, dispersion tank; 26, drainage pipe; 27, particle detector; 28, powder supply pipe; 29, second collection box; 30, mixing and crystal forming component; 31, overflow shunt box; 32, liquid discharge tank; 33, liquid discharge pipe; 34, pump body; 35, liquid outlet; 36, circulation rack; 37, mixing tank body; 38, mixing double-end pipe; 39, liquid supply channel; 40, shunt component; 4001, shunt main pipe; 4002, second shunt pipe; 4003, first liquid supply valve; 4004, second liquid supply valve; 41, first liquid supply tank; 42, second liquid supply tank; 43, separation tank; 44, liquid collecting interface. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] Embodiment

[0020] As shown in the attached Figures 1 to 9 An equipment for preparing modified magnesium hydroxide by a wet method, including a crushing and acid-leaching ore mechanism 1 and a reaction mechanism 5. A first conveying pipe 2 is installed on the side of the crushing and acid-leaching ore mechanism 1 through bolts. The conveying end of the first conveying pipe 2 is connected to a blending mechanism 3 through 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. The output end of the second conveying pipe 4 is installed with a reaction mechanism 5. A horizontal centrifuge 7 is fixedly connected to the side of the reaction mechanism 5 through bolts. The end of the horizontal centrifuge 7 is installed with a third conveying pipe 6. The output end of the third conveying pipe 6 is installed with a separation mechanism 8. The crushing and acid-leaching ore mechanism 1 includes a soaking area 10 and a precipitation mixing area 11. The reaction mechanism 5 includes a collection box and a mixing and crystal forming component 30.

[0021] As a preferred embodiment, the soaking area 10 includes a spiral crusher 12 and a soaking tank 15. The soaking tank 15 is arranged below the spiral crusher 12 and is used for the crushing and acid leaching pretreatment of minerals, providing an acid leaching solution that meets the particle size requirements for subsequent reactions. The soaking area 10 is the area for the preliminary crushing and acid leaching reaction of minerals. In cooperation with the spiral crusher 12, the minerals are ground by driving the spiral rod to rotate, so that the minerals move along the fourth conveying pipe 13 and are ground to an appropriate particle size. Then, the soaking tank 15 receives the ground ore particles and contacts with the acid solution to complete the preliminary decomposition, providing raw materials for the subsequent stirring reaction. After the preliminary decomposition of the minerals, the liquid enters the precipitation mixing area 11, promotes the complete acid leaching reaction and precipitates impurities, so that the impurities in the liquid are deposited at the bottom for extraction, reducing the content of impurities in the conveying liquid. The spiral crusher 12 includes a fourth conveying pipe 13 and a first stepping motor 14. The first stepping motor 14 is installed on the side of the fourth conveying pipe 13 through bolts.

[0022] As a preferred embodiment, the precipitation mixing area 11 includes a first connecting pipe 16. The stirring tank 17 is fixedly connected to the side of the first connecting pipe 16 through bolts. The second stepping motor 18 is installed above the stirring tank 17. The first connecting pipe 16 is connected to the soaking area 10 and the stirring tank 17. The acid leaching solution and ore particles are transported by a pump. When the liquid is transported into the interior of the stirring tank 17, through the stirring rod installed inside it, the output end of the second stepping motor 18 is meshed and connected with the stirring rod through a bevel gear. A precipitation tank 20 is arranged on the side of the stirring tank 17 and is driven by the second stepping motor 18 through a bevel gear to accelerate the mineral decomposition reaction. The precipitation tank 20 receives the stirred liquid through the second connecting pipe 19, and the impurities are precipitated by standing, improving the purity of the acid leaching solution. The top ends of the stirring tank 17 and the precipitation tank 20 are connected and communicated with a second connecting pipe 19. A liquid delivery pipe 9 is installed between the blending mechanism 3 and the separation mechanism 8.

[0023] As a preferred embodiment, the blending mechanism 3 includes a fixed bracket 21. A first collection box 22 is installed between the two groups of fixed brackets 21. A detection component 23 is installed on the side of the first collection box 22, which is used for the mixing and detection of the acid leaching solution and the modifier to ensure the uniform dispersion of the modifier. The set fixed bracket 21 supports the first collection box 22 to ensure the stability of the mechanism. The set first collection box 22 stores the acid solution with ore, providing raw materials for subsequent mixing. A first shunt pipe 24 is installed above the detection component 23. Measuring instruments 2305 are connected to the pipe body of the first shunt pipe 24 and are respectively connected to a dispersion box 25. A diversion pipe 26 is connected and communicated between the dispersion box 25 and the first collection box 22. Particle detectors 27 are installed on the outer diameter surface of the diversion pipe 26. Powder supply pipes 28 are installed on the top ends of the dispersion boxes 25 to transport the mixed modifier to the acid leaching solution, and the particle size is monitored in real time by the outer particle detectors 27 to ensure the mixing effect.

[0024] As a preferred embodiment, the detection component 23 includes a first pipeline 2301. The top end of the first pipeline 2301 is installed with a second pipeline 2302. Support brackets 2303 are installed on the outer diameter surfaces of the second pipeline 2302. Then, the first pipeline 2301 in the detection component 23 conveys the belt ore acid liquid to the detection end, facilitating the real-time monitoring of the liquid composition. The second pipeline 2302 is connected to a tee 2304 to convey the liquid modifier to the mixing path and cooperate with a measuring instrument 2305. The measuring instrument 2305 is installed at the top end of the tee 2304 to control the addition amount of the modifier and ensure the mixing ratio. The modifier receives the solid modifier through a powder supply pipe 28 in a dispersion tank 25 and is mixed with ethanol to form a liquid modifier. The top mixer ensures uniform dispersion and is connected to the dispersion tank 25 and a first collection tank 22 through a diversion pipe 26. Three-way pipes 2304 are respectively installed on the sides of the support brackets 2303, and the measuring instrument 2305 is installed at the top end of the three-way pipe 2304. The detection probe of the measuring instrument 2305 is arranged inside the set pipeline. During the movement of the liquid along the pipeline, the probe detects the liquid. The model of the measuring instrument 2305 is Mastersizer 3000.

[0025] As a preferred embodiment, the reaction mechanism 5 includes a second collection tank 29. A mixing and crystallization component 30 is arranged below the second collection tank 29. The second collection tank 29 collects the semi-mixed liquid, providing a buffer space for deep mixing. An overflow diversion tank 31 is installed at the top end of the second collection tank 29. A drain tank 32 is installed on the side of the overflow diversion tank 31. A drain pipe 33 is installed at the top end of the drain tank 32. A pump body 34 is installed at the bottom end of the drain pipe 33. An outlet 35 is arranged on one side of the pump body 34 at the top end of the horizontal centrifuge 7.

[0026] As a preferred embodiment, the mixing and crystallization assembly 30 includes a circulation rack 36. A number of mixing tanks 37 are installed between two groups of circulation racks 36. A mixing double-ended pipe 38 is installed on one side of the circulation rack 36 away from the mixing tank 37. During the process of the circulation rack 36 in the mixing and crystallization assembly 30 supporting the mixing tank 37, the internal channels form a liquid circulation path. Then the mixing tank 37 promotes liquid turbulence, realizing the full mixing of the modifier and the acid leaching solution and inducing crystal growth. A liquid supply channel 39 is sleeved on the outer diameter surface of the mixing double-ended pipe 38. Through the cooperation of the mixing double-ended pipe 38 and the liquid supply channel 39, by controlling the first liquid supply valve 4003 and the second liquid supply valve 4004 to adjust the liquid flow direction, the liquid moves within the set mixing tank 37, enabling the liquid to circulate fully and ensuring uniform mixing. Then the shunt assembly 40, through the second shunt pipe 4002 on the shunt main pipe 4001, evenly distributes the pressurized liquid to each mixing tank 37 to optimize the crystallization efficiency. At this time, the overflow shunt 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 and communicated with a shunt assembly 40 including a shunt main pipe 4001. Second shunt pipes 4002 are installed on the sides of the shunt main pipe 4001. A first liquid supply valve 4003 is installed on one side of the shunt main pipe 4001 away from the second shunt pipe 4002. Second liquid supply valves 4004 are installed on both sides of the shunt main pipe 4001 where the second shunt pipe 4002 is located.

[0027] As a preferred embodiment, the separation mechanism 8 includes a first liquid supply tank 41. A second liquid supply tank 42 is connected to the side of the first liquid supply tank 41 through a pipeline. The bottom ends of the second liquid supply tanks 42 are respectively connected to separation tanks 43. The horizontal centrifuge 7 performs solid-liquid separation on the crystallized liquid through high-speed rotation. The mother liquor is discharged from the liquid outlet 35. The solid filter cake is conveyed to the separation mechanism 8 by the third conveying pipe 6. Then the first liquid supply tank 41 and the second liquid supply tank 42 sequentially wash and pulp the water-containing filter cake to remove the impurities remaining inside the cake body, and convey the cake liquid to the inside of the separation tank 43, and wash the filter cake pulp. The washing liquid is recovered through the liquid collecting interface 44 to improve the product purity. A liquid collecting interface 44 is connected to the side of the separation tank 43 through a pipeline. Then the first conveying pipe 2, the second conveying pipe 4, and the third conveying pipe 6 are connected by a sealing ring to ensure no leakage during the liquid conveying process and maintain the stability of the system pressure.

[0028] The working process of this application is as follows: First, the ore is acid-leached to generate a solution. First, the ore is placed inside the spiral pulverizer 12 of the crushing and acid-leaching ore mechanism 1. When the ore moves along the fourth conveying pipe 13 of the spiral pulverizer 12, the first stepping motor 14 drives the internal screw rod to rotate to grind the ore. Then the ground ore particles fall into the soaking tank 15. At this time, the ore in the soaking area 10 comes into contact with the acid solution, causing the ore to decompose preliminarily. Then, through the pump connected to the first connecting pipe 16, the acid solution carrying the ore particles in the soaking area 10 is transported into the stirring tank 17. Then the second stepping motor 18 drives the stirring rod to rotate through the bevel gear, accelerating the reaction of the ore and completing the decomposition of the ore. After the stirring is completed, the liquid is sucked through the pump in the second connecting pipe 19 and transported into the precipitation tank 20. After the ore-carrying acid solution is allowed to stand in the precipitation tank 20, the liquid is transported into the blending mechanism 3 through the first conveying pipe 2 at this time; Then, the detection component 23 provided in the blending mechanism 3 is used to transport the ore-carrying acid solution into the first collection tank 22 and send it out through the first pipeline 2301 for detection. Then the solid modifier is transported into the dispersion tank 25 through the powder supply pipe 28. Then the detection component 23 transports ethanol liquid through the first pipeline 2301, mixing the solid modifier with ethanol and mixing them through the mixer at the top. After mixing, the liquid modifier is transported into the tee pipe 2304 through the pipeline on the measuring instrument 2305 and then transported into the first pipeline 2301 along the second pipeline 2302, thus obtaining the liquid modifier for detection. After confirming that the diversion pipe 26 transports it into the first collection tank 22 to fuse with the ore-carrying acid solution, a semi-mixed liquid is obtained in the first collection tank 22; Then the semi-mixed liquid modifier is transported into the second collection tank 29 through the diversion pipe 26 to be preliminarily mixed with the ore-carrying acid solution. At this time, the ore-carrying acid solution and the modifier cannot be fully mixed. Then the semi-mixed modified liquid is transported into the second collection tank 29 through the second conveying pipe 4. When the liquid is collected in the second collection tank 29, the semi-mixed liquid is pressurized and transported into the mixing and crystallization component 30. At this time, the pressurized semi-mixed liquid is transported into the internal 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 internal of the mixing tank body 37 through the circulation frame 36. When the semi-mixed liquid circulates in the mixing tank body 37, baffles are provided in the mixing tank body 37 to disturb the liquid and fully mix it, so that when the semi-mixed liquid flows, the unmixed liquid inside is fully mixed; Then the mixed liquid is crystallized, and the liquid is subjected to solid-liquid separation by a horizontal centrifuge 7. Then, the obtained water-containing filter cake is mixed with water in the first liquid supply tank 41 and continuously conveyed into the interior of the second liquid supply tank 42. Then, the water-containing filter cake is made into a slurry and washed by a separation tank 43 to obtain a water-containing filter cake, which is heated subsequently to obtain a powder. The above is the working principle of the equipment and its preparation method for preparing modified magnesium hydroxide by a wet method.

Claims

1. An apparatus for preparing modified magnesium hydroxide by a wet method, comprising a crushing and acid-leaching ore mechanism (1) and a reaction mechanism (5), characterized in that: On the side of the crushing and acid leaching ore mechanism (1), a first conveying pipe (2) is installed through bolts. The conveying end of the first conveying pipe (2) is connected to a blending mechanism (3) through 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). The output end of the second conveying pipe (4) is installed with a reaction mechanism (5). On the side of the reaction mechanism (5), a horizontal centrifuge (7) is fixedly connected through bolts. The end of the horizontal centrifuge (7) is installed with a third conveying pipe (6). The output end of the third conveying pipe (6) is installed with a separation mechanism (8). The crushing and acid leaching ore mechanism (1) includes a soaking area (10) and a precipitation mixing area (11). The reaction mechanism (5) includes a collection box and a crystal mixing component (30). A liquid delivery pipe (9) is installed between the blending mechanism (3) and the separation mechanism (8).

2. The device for preparing modified magnesium hydroxide by a wet method according to claim 1, characterized in that: The soaking area (10) includes a spiral crusher (12) and a soaking tank (15). The spiral crusher (12) is arranged below the soaking tank (15). The spiral crusher (12) includes a fourth conveying pipe (13) and a first stepping motor (14). The first stepping motor (14) is installed on the side of the fourth conveying pipe (13) through bolts.

3. An apparatus for preparing modified magnesium hydroxide by a wet method according to claim 1, characterized in that: The precipitation mixing area (11) includes a first connecting pipe (16). A stirring tank (17) is fixedly connected to the side of the first connecting pipe (16) through bolts. A second stepping motor (18) is installed above the stirring tank (17). The output end of the second stepping motor (18) is meshed and connected with a stirring rod through bevel gears. A precipitation tank (20) is arranged on the side of the stirring tank (17). The top ends of the stirring tank (17) and the precipitation tank (20) are connected and communicated through a second connecting pipe (19).

4. An apparatus for preparing modified magnesium hydroxide by a wet method according to claim 3, characterized in that: The blending mechanism (3) includes a fixed bracket (21). A first collection box (22) is installed between the two groups of fixed brackets (21). A detection component (23) is installed on the side of the first collection box (22). A first shunt pipe (24) is installed above the detection component (23). Measuring instruments (2305) communicated with the pipe body of the first shunt pipe (24) are respectively connected to dispersion tanks (25). A diversion pipe (26) is connected and communicated between the dispersion tanks (25) and the first collection box (22). Particle detectors (27) are installed on the outer diameter surface of the diversion pipe (26). Powder supply pipes (28) are installed on the top ends of the dispersion tanks (25).

5. An apparatus for preparing modified magnesium hydroxide by a wet method according to claim 4, characterized in that: The detection component (23) includes a first pipe (2301). A second pipe (2302) is installed on the top of the first pipe (2301). Support brackets (2303) are installed on the outer diameter surface of the second pipe (2302). Three-way pipes (2304) are respectively installed on the sides of the support brackets (2303). Measuring instruments (2305) are installed on the top ends of the three-way pipes (2304).

6. The device for preparing modified magnesium hydroxide by a wet method according to claim 5, characterized in that: The reaction mechanism (5) includes a second collection tank (29). A crystal mixing and forming assembly (30) is provided below the second collection tank (29). An overflow and diversion tank (31) is installed at the top of the second collection tank (29). A liquid discharge tank (32) is installed on the side of the overflow and diversion tank (31). A liquid discharge pipe (33) is installed at the top of the liquid discharge tank (32). A pump body (34) is installed at the bottom of the liquid discharge pipe (33). An outlet (35) is provided on one side of the pump body (34) at the top of the horizontal centrifuge (7).

7. An apparatus for preparing modified magnesium hydroxide by a wet method according to claim 1, characterized in that: The crystal mixing and forming assembly (30) includes a circulation frame (36). A number of mixing tanks (37) are installed between two circulation frames (36). A mixing double-ended pipe (38) is installed on the side of the circulation frame (36) away from the mixing tanks (37). A liquid supply channel (39) is sleeved on the outer diameter surface of the mixing double-ended pipe (38). The bottom end of the mixing double-ended pipe (38) is connected and communicated with a diversion assembly (40). The diversion assembly (40) includes a diversion main pipe (4001). Second diversion pipes (4002) are installed on the sides of the diversion main pipe (4001). A first liquid supply valve (4003) is installed on the side of the diversion main pipe (4001) away from the second diversion pipes (4002). Second liquid supply valves (4004) are installed on both sides of the diversion main pipe (4001) where the second diversion pipes (4002) are located.

8. An apparatus for preparing modified magnesium hydroxide by a wet method according to claim 7, characterized in that: The separation mechanism (8) includes a first liquid supply tank (41). A second liquid supply tank (42) is connected to the side of the first liquid supply tank (41) through a pipeline. The bottom ends of the second liquid supply tanks (42) are respectively connected to a separation tank (43). A liquid collecting interface (44) is connected to the side of the separation tank (43) through a pipeline.

9. A preparation method for preparing modified magnesium hydroxide by a wet method, which applies the equipment for preparing modified magnesium hydroxide by a wet method described in any one of claims 1-8, and is characterized in that: The preparation method includes the following steps: Step 1: First, acid leach the ore to generate a solution. First, put the ore into the interior of the spiral crusher (12) of the crushing and acid leaching ore mechanism (1). During the process of the ore moving along the fourth conveying pipe (13) of the spiral crusher (12), the first stepping motor (14) drives the internal screw rod to rotate to grind the ore. Then, the ground ore particles fall into the interior of the soaking tank (15). At this time, the ore in the soaking area (10) comes into contact with the acid solution, causing the ore to be preliminarily decomposed. Then, through the pump connected to the first connecting pipe (16), the acid solution carrying the ore particles in the soaking area (10) is transported into the interior of the stirring tank (17). Then, the second stepping motor (18) drives the stirring rod to rotate through the bevel gear, thereby accelerating the reaction of the ore, completing the decomposition of the ore. After the stirring is completed, at this time, the liquid is sucked and transported into the interior of the precipitation tank (20) through the pump in the second connecting pipe (19), and the ore-bearing acid solution is allowed to stand in the precipitation tank (20). After the ore-bearing acid solution is allowed to stand in the precipitation tank (20), at this time, the liquid is transported into the interior of the co-mixing mechanism (3) through the first conveying pipe (2); Step 2: Then, the detection component (23) set in the blending mechanism (3) is used to convey the ore-bearing acid liquid transported into the first collection tank (22), and convey it out through the first pipeline (2301) for detection. Then, the solid modifier is conveyed into the dispersion tank (25) through the powder supply pipe (28). Then, the detection component (23) conveys ethanol liquid through the first pipeline (2301), mixes the solid modifier with ethanol, and mixes them through the blender at the top. After mixing, the liquid modifier is conveyed into the three-way pipe (2304) through the pipeline on the measuring instrument (2305) and then conveyed into the first pipeline (2301) along the second pipeline (2302), thereby obtaining the liquid modifier for detection. After confirmation, it is conveyed into the first collection tank (22) through the drainage pipe (26) to be fused with the ore-bearing acid liquid, so as to obtain a semi-mixed liquid in the first collection tank (22). Step 3: Then, the semi-mixed liquid modifier is conveyed into the second collection tank (29) through the drainage pipe (26) for preliminary mixing with the ore-bearing acid liquid. At this time, the ore-bearing acid liquid and the modifier cannot be fully mixed. Then, the semi-mixed modified liquid is conveyed into the second collection tank (29) through the second conveying pipe (4). Then, during the process of collecting the liquid in the second collection tank (29), the semi-mixed liquid is pressurized and conveyed into the mixing and crystal formation component (30). The pressurized semi-mixed liquid is conveyed into the internal 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 conveyed into the internal of the mixing tank body (37) through the circulation rack (36). During the process of the semi-mixed liquid flowing in the mixing tank body (37), it is fully mixed. Step 4: Then, the mixed liquid is crystallized, and the liquid is subjected to solid-liquid separation by the horizontal centrifuge (7). Then, the obtained water-containing filter cake is mixed with water in the first liquid supply tank (41) and then continuously conveyed into the second liquid supply tank (42). Then, the water-containing filter cake becomes a slurry and is washed by the separation tank (43) to obtain the water-containing filter cake, and then heated to obtain the powder.

Images