Production device for producing modified magnesium hydroxide without coarse particles

Abstract

A production device for producing modified magnesium hydroxide without coarse particles comprises a semi-finished product bin (1), a first spiral reamer (2), a modification main machine (3), a cooling machine (4), an airflow powder screening machine (5), a pulse cloth bag collector (6), an induced draft fan (7), a second spiral reamer (8), a packaging machine (9), a modifier feeding port (10), a base (11), a stirring blade (12), a dust removal cloth bag (13) and a discharging port switch (14). According to the device disclosed by the utility model, the modification main machine and the airflow powder screening machine are arranged in a matched manner, the modification main machine solves the problem of modification temperature, and the airflow powder screening machine solves the problem of powder screening; the modified superfine magnesium hydroxide finished product is good in dispersing performance, free of agglomeration and excellent in flame retardant property and mechanical property; and airflow powder screening is not prone to blockage, high in screening efficiency and large in yield. The device is suitable for producing modified magnesium hydroxide without coarse particles.

Description

Technical Field

[0001] This utility model relates to a production apparatus for producing modified magnesium hydroxide without coarse particles, belonging to the field of inorganic non-metallic powder modification technology. Background Technology

[0002] Magnesium hydroxide is a commonly used inorganic flame retardant in industry, widely applied in wire and cable, heat shrink tubing, rubber, nylon, and other sectors. With rapid global economic development and increasing consumer demand for higher quality of life and safety, the construction, transportation, and electronics industries are experiencing a surge in demand for flame-retardant materials. This has created a huge market for flame retardants, with increasingly stringent performance requirements. As an inorganic flame retardant, the finer the particle size of magnesium hydroxide, the better its dispersion, resulting in superior flame retardant and mechanical properties. However, as an inorganic compound, magnesium hydroxide exhibits poor compatibility and dispersion in polymers such as plastics and rubber. Therefore, surface modification treatment of ultrafine magnesium hydroxide is necessary.

[0003] However, due to its fineness, ultrafine magnesium hydroxide is prone to water absorption, and during the modification process, it may agglomerate to a certain extent, resulting in coarse particles. These coarse particles will affect the flame retardant and mechanical properties of ultrafine magnesium hydroxide. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor flame retardant properties of traditional ultrafine magnesium hydroxide due to agglomeration and the formation of coarse particles. This invention proposes a production device for producing modified magnesium hydroxide without coarse particles.

[0005] The technical solution of this utility model is as follows: a production device for producing modified magnesium hydroxide without coarse particles, including a semi-finished product silo, a spiral cutter, a modification main unit, a cooler, a pulse bag collector, an induced draft fan, a packaging machine, and also including the modification main unit and an airflow sieving machine.

[0006] The discharge port at the bottom of the semi-finished product silo is connected to the feed end of the first spiral reamer; the discharge end of the first spiral reamer is connected to the feed port at the top of the modifying main unit; the discharge port at the bottom of the modifying main unit is connected to the feed port at the top of the cooler; the discharge port at the bottom of the cooler is connected to the feed port at the top of the airflow sieving machine; the discharge port at the bottom of the airflow sieving machine is connected to a pulse bag filter collector via a pipe; the air inlet at the top of the pulse bag filter collector is connected to an induced draft fan via an air duct; and the discharge port at the bottom of the pulse bag filter collector is connected to a packaging machine via a second spiral reamer. A modifier feed port is provided at the top of the modifying main unit.

[0007] The modified host is equipped with a stirring blade and a discharge switch connected to a rotating shaft at its inner bottom. The inner wall of the modified host is equipped with a heat-conducting oil jacket, which can be used to set the modification temperature. The modified host is mounted on a base, which is hollow. A motor installed inside the base is connected to the rotating shaft via a belt and can drive the stirring blade to rotate at high speed. When the discharge switch is opened, the modified ultrafine magnesium hydroxide from the modified host can automatically enter the cooler.

[0008] The airflow sieve has a vertical cylindrical screen inside the sealed outer shell of the upper screen body. A circular impeller is mounted on the inner side of the screen. The main shaft is driven by a motor inside the base to rotate at high speed and then sieve through the screen. The feed hopper and screen are installed directly above the outer shell of the airflow sieve. There is a specially designed slag discharge port at the bottom of the air duct. The motor and the main shaft are connected by a belt. The impeller and the lower opening of the feed hopper form a partition gap.

[0009] The bottom of the cooler pot is equipped with stirring blades and a discharge port, and the pot wall is equipped with a circulating cooling water jacket, which can cool the modified magnesium hydroxide.

[0010] The first and second spiral reamers are both horizontally installed; the semi-finished product silo, the modification host, the cooler, the airflow sieve, the pulse bag filter, and the induced draft fan are all vertically installed.

[0011] The beneficial effects of this invention are that the coordinated design of the modification host and the airflow sieving machine solves the temperature problem during modification, while the airflow sieving machine solves the powder sieving problem. The modified ultrafine magnesium hydroxide product exhibits good dispersion performance, no agglomeration, and excellent flame retardant and mechanical properties. The airflow sieving machine is less prone to clogging, has high sieving efficiency, and high output. This invention is suitable for the production of modified magnesium hydroxide without coarse particles. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the production apparatus for producing coarse-particle-free modified magnesium hydroxide according to this utility model.

[0013] Figure 2 This is a schematic diagram of the airflow sieving machine.

[0014] In the diagram, 1 is the semi-finished product silo; 2 is the first spiral cutter; 3 is the modification main unit; 4 is the cooler; 5 is the airflow sieve; 6 is the pulse bag filter; 7 is the induced draft fan; 8 is the second spiral cutter; 9 is the packaging machine; 10 is the modifier inlet; 11 is the base; 12 is the stirring blade; 13 is the dust collector bag; 14 is the discharge port switch; 15 is the feed hopper; 16 is the screen; 17 is the slag discharge port; and 18 is the impeller. Detailed Implementation

[0015] The specific embodiments of this utility model are shown in the accompanying drawings.

[0016] like Figure 1 As shown in the figure, this embodiment is a production apparatus for producing non-coarse particle modified magnesium hydroxide, including a semi-finished product silo 1, a first spiral cutter 2, a modifying main unit 3, a cooler 4, an airflow sieve 5, a pulse bag collector 6, an induced draft fan 7, a second spiral cutter 8, a packaging machine 9, a modifier inlet 10, a base 11, a stirring blade 12, a dust collector bag 13, and a discharge port switch 14.

[0017] In this embodiment, the semi-finished product hopper 1 is connected to the modification host 3 through the first spiral reamer 2; the bottom center of the modification host 3 is provided with a stirring blade 12 connected to a rotating shaft and a discharge switch 14; the wall of the modification host is provided with a heat-conducting oil jacket, which can set the modification temperature; the modification host 3 is installed on the base 11, the base is hollow, and the motor inside is connected to the rotating shaft through a belt, which can drive the stirring blade 12 to rotate at high speed; after the discharge switch 14 is opened, the modified ultrafine magnesium hydroxide of the modification host 3 can automatically enter the cooler 4.

[0018] In this embodiment, the bottom of the cooler 4 pot is equipped with a stirring blade and a discharge port, and the pot wall is equipped with a circulating cooling water jacket, which can cool the modified magnesium hydroxide; the discharge port of the cooler 4 is connected to the airflow sieve 5.

[0019] like Figure 2 As shown, the airflow sieving machine 5 of this embodiment includes a screen 16, a feed hopper 15, a blower 18, a main shaft, a slag discharge port 17, a motor, and a housing. A vertical cylindrical screen 16 is installed inside the sealed housing of the upper screen body of the airflow sieving machine 5. A circular blower 18 is mounted inside the screen 16. The main shaft is driven to rotate at high speed by a motor installed inside the base, allowing the screen to pass through and sieve the particles. The feed hopper 15 and screen 16 are mounted directly above the housing of the airflow sieving machine 5. A specially designed slag discharge port 17 is located at the lower part of the air duct. The motor and main shaft are connected by a belt. The blower 18 forms a gap with the lower opening of the feed hopper.

[0020] In this embodiment, the airflow sieving machine 5 and the pulse bag collector 6 are connected by an air duct; the pulse bag collector 6 contains a number of dust collection bags, which are connected to the induced draft fan 7 through an air duct; the bottom of the pulse bag collector 6 is provided with a discharge port, which is connected to the packaging machine 9 through a second spiral cutter 8.

[0021] The process flow of this embodiment is as follows: The ultrafine magnesium hydroxide in the semi-finished product silo 1 is conveyed to the modification host 3 through the first spiral cutter 2. After being heated to the modification temperature, the modification host 3 adds the modifier by spraying it through the modifier spray nozzle 11 while stirring at high speed. After a certain modification time, the discharge port switch 14 of the modification host is opened, and the modified ultrafine magnesium hydroxide enters the cooling chamber 4 for cooling. After cooling, it automatically enters the middle of the impeller 18 of the airflow sieve 5 through the discharge port. Under the action of the centrifugal force of the impeller 18 blades and the blower 7, the well-dispersed ultrafine modified magnesium hydroxide particles pass through the screen 16 into the pulse bag collector 6, and enter the packaging machine 9 through the second spiral cutter 8 to be packaged into the finished product; the agglomerated coarse magnesium hydroxide particles are screened off by the screen and collected and recycled through the slag discharge port 17.

Claims

1. A production apparatus for producing coarse-particle-free modified magnesium hydroxide, comprising a semi-finished product silo, a spiral cutter, a modification main unit, a cooler, a pulse bag filter, an induced draft fan, and a packaging machine, characterized in that, The device also includes a modification host and an airflow sieve; the discharge port at the bottom of the semi-finished product silo is connected to the feed end of the first spiral auger; the discharge end of the first spiral auger is connected to the feed port at the top of the modification host; the discharge port at the bottom of the modification host is connected to the feed port at the top of the cooler; the discharge port at the bottom of the cooler is connected to the feed port at the top of the airflow sieve; the discharge port at the bottom of the airflow sieve is connected to a pulse bag filter collector via a pipe; the air inlet at the top of the pulse bag filter collector is connected to an induced draft fan via an air duct; and the discharge port at the bottom of the pulse bag filter collector is connected to a packaging machine via a second spiral auger. The inner bottom of the modified host is equipped with a stirring blade and a discharge switch connected by a rotating shaft, and the inner wall of the modified host is equipped with a heat-conducting oil jacket, which can set the modification temperature. The modified host is mounted on a hollow base. A motor installed inside the base is connected to a rotating shaft via a belt and can drive the stirring blades to rotate at high speed. After the discharge switch is opened, the modified ultrafine magnesium hydroxide from the modified host can automatically enter the cooler. The airflow sieve has a vertical cylindrical screen inside the sealed outer shell of the upper screen body. A circular impeller is mounted on the inner side of the screen. The main shaft is driven by a motor inside the base to rotate at high speed and then sieve through the screen. The feed hopper and screen are installed directly above the outer shell of the airflow sieve. There is a specially designed slag discharge port at the bottom of the air duct. The motor and the main shaft are connected by a belt. The impeller and the lower opening of the feed hopper form a partition gap.

2. The production apparatus for producing coarse-particle-free modified magnesium hydroxide according to claim 1, characterized in that, The bottom of the cooler pot is equipped with stirring blades and a discharge port, and the pot wall is equipped with a circulating cooling water jacket, which can cool the modified magnesium hydroxide.

3. The production apparatus for producing coarse-particle-free modified magnesium hydroxide according to claim 1, characterized in that, The top of the modification host is provided with a modifier inlet.

4. The production apparatus for producing coarse-particle-free modified magnesium hydroxide according to claim 1, characterized in that, The first and second spiral reamers are both horizontally installed; the semi-finished product silo, the modification host, the cooler, the airflow sieve, the pulse bag filter, and the induced draft fan are all vertically installed.

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