Inorganic powder surface treatment system and treatment method using the same

Abstract

The application discloses an inorganic powder surface treatment system and a treatment method using the same, and relates to the field of inorganic powder modification treatment. The system comprises a powder pretreatment mechanism, a depolymerization mechanism, an atomization chamber mechanism and a coating mechanism, and further comprises a surface treatment agent spraying mechanism connected to the atomization chamber mechanism. The depolymerization mechanism is used to provide a suspension depolymerization space for the inorganic powder, to depolymerize the inorganic powder, and to control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time. The atomization chamber mechanism is used to provide a surface treatment space for the inorganic powder, and the surface treatment agent spraying mechanism can spray the surface treatment agent to the inorganic powder in the surface treatment space of the atomization chamber mechanism. The application mainly solves the problem of how to provide an inorganic powder surface treatment equipment and treatment method with small surface treatment agent dosage, high coating rate, low energy consumption and the ability to realize inorganic powder material depolymerization. The application can obtain inorganic powder with low moisture and impurity content, high coating rate and uniform coating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inorganic powder modification treatment, in particular to an inorganic powder surface treatment system and a treatment method using the same. BACKGROUND

[0002] Calcium carbonate, talc, kaolin and wollastonite powder and other materials belong to inorganic powder materials. After fine inorganic powder materials are treated on the surface, new physical and chemical properties can often be obtained, which can be applied alone or in combination with other materials. Therefore, inorganic powder materials treated on the surface are widely used in the fields of plastics, rubber, ceramics, catalysts, pigments and electronic industries.

[0003] The surface treatment of inorganic powder materials mainly adopts coating technology. Many inorganic powder surface treatment equipment has appeared in the prior art. For example, the Chinese patent publication CN112206923A and the Chinese utility model patent publication CN205473982U both disclose typical inorganic powder surface treatment equipment, and the surface treatment of inorganic powder materials is completed by coating technology.

[0004] The inorganic powder surface treatment equipment in the prior art generally has the problems of large amount of surface treatment agent, low coating rate, high energy consumption and easy agglomeration of inorganic powder materials after coating.

[0005] For example, the Chinese patent publication CN112206923A completes the coating process and particle size sorting of inorganic powder materials by the method of coating first and sorting later. However, for inorganic powder materials of different particle sizes, the coating process flow, process parameters and even the surface treatment agent will be different. The process of coating multiple particle sizes of inorganic powder materials first and then sorting is obviously prone to the problems of low coating rate and uneven coating.

[0006] For example, the Chinese utility model patent publication CN205473982U completes the coating process flow of inorganic powder materials in a tubular spray drying device. The inorganic powder materials in the spray drying device are in an agglomerated state. Without the inorganic powder materials being depolymerized, the same problems of low coating rate and uneven coating will exist when the coating process flow is completed.

[0007] In summary, how to provide inorganic powder surface treatment equipment and treatment methods with small amount of surface treatment agent, high coating rate, low energy consumption and the ability to depolymerize inorganic powder materials has become a problem to be solved. SUMMARY

[0008] The present application aims to provide an inorganic powder surface treatment system and a treatment method using the same, which has the advantages of small amount of surface treatment agent, high coating rate, low energy consumption and inorganic powder material depolymerization.

[0009] To achieve the above object, the present application provides the following technical solution: an inorganic powder surface treatment system for completing the coating process of inorganic powder; it comprises powder pretreatment mechanism, depolymerization mechanism, atomization chamber mechanism and coating mechanism which are sequentially connected from top to bottom, and it further comprises surface treatment agent spraying mechanism connected to the atomization chamber mechanism; the powder pretreatment mechanism is used for at least one of drying, homogenizing, screening and preliminary depolymerization of the inorganic powder; the depolymerization mechanism is used for providing a suspension depolymerization space for the inorganic powder to depolymerize the inorganic powder and control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time; the atomization chamber mechanism is used for providing a surface treatment space for the inorganic powder, and the surface treatment agent spraying mechanism can spray surface treatment agent to the inorganic powder in the surface treatment space of the atomization chamber mechanism; the coating mechanism is used for uniformly coating the surface treatment agent on the surface of the inorganic powder.

[0010] In the above technical solution, the depolymerization mechanism comprises a suspension depolymerization pipeline for providing the suspension depolymerization space; the suspension depolymerization pipeline is provided with a wind pressure control device for introducing high-pressure air into its own interior and adjusting the wind pressure of the high-pressure air; the inorganic powder can be suspended in the suspension depolymerization pipeline under the action of the high-pressure air to complete depolymerization and fall to the atomization chamber body at a preset speed to control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time.

[0011] In the above technical solution, the length of the suspension depolymerization pipeline is 3.2-3.8 m, and the wind pressure introduced into the suspension depolymerization pipeline is 0.3-0.5 MPa.

[0012] In the above technical solution, the atomization chamber mechanism comprises an atomization chamber body for providing the surface treatment space; the suspension depolymerization pipeline of the depolymerization mechanism and the atomization chamber body of the atomization chamber mechanism are sequentially connected from top to bottom; the atomization chamber body is provided with a treatment surface for receiving and stopping the inorganic powder; the surface treatment agent spraying mechanism is connected to the atomization chamber body and can spray surface treatment agent towards the treatment surface.

[0013] In the above technical solution, the surface treatment agent spraying mechanism comprises a surface treatment agent storage bin and an atomization spray gun; the surface treatment agent storage bin is used for storing surface treatment agent; the atomization spray gun is connected to the atomization chamber body of the atomization chamber mechanism and can extract surface treatment agent from the surface treatment agent storage bin and spray surface treatment agent towards the treatment surface.

[0014] In the technical scheme, the powder pretreatment mechanism comprises, from top to bottom, a drying sub-mechanism, a homogenizer sub-mechanism and an electric screen sub-mechanism; the drying sub-mechanism is used for drying the inorganic powder; the homogenizer sub-mechanism is used for homogenizing the inorganic powder; and the electric screen sub-mechanism is used for screening and preliminarily depolymerizing the inorganic powder.

[0015] In the technical scheme, the inorganic powder surface treatment system further comprises a feeding mechanism used for quantitatively feeding the inorganic powder to the powder pretreatment mechanism; the feeding mechanism comprises a raw material bin, a vacuum pump and a metering device; the raw material bin is used for storing the untreated inorganic powder; the metering device is arranged at an inlet end of the powder pretreatment mechanism; and the vacuum pump is connected to the raw material bin through a vacuum pipeline, so as to lift the inorganic powder in the raw material bin to the height of the metering device through the vacuum pipeline; and the metering device can quantitatively feed the inorganic powder to the powder pretreatment mechanism.

[0016] In the technical scheme, the coating mechanism is a pin disc mill mechanism used for impacting, rubbing and shearing the inorganic powder.

[0017] An inorganic powder surface treatment method is used for completing the coating process of the inorganic powder, and the inorganic powder surface treatment system is applied.

[0018] The inorganic powder surface treatment method comprises the following steps.

[0019] S1, at least one of drying, homogenizing, screening and preliminary depolymerization is performed on the inorganic powder by a powder pretreatment mechanism;

[0020] S2, the inorganic powder is depolymerized by a depolymerization mechanism, and the weight of the inorganic powder falling into a mist chamber mechanism per unit time is controlled.

[0021] S3, a surface treatment agent is sprayed on the inorganic powder in the mist chamber mechanism by a surface treatment agent spraying mechanism.

[0022] S4, the surface treatment agent is uniformly coated on the surface of the inorganic powder by a coating mechanism.

[0023] In the technical scheme, step S2 specifically comprises the following steps: high-pressure air is introduced into a suspension depolymerization pipeline of the depolymerization mechanism; the flow rate of the high-pressure air is adjusted according to the particle size of the inorganic powder, so that the inorganic powder can be suspended in the suspension depolymerization pipeline under the action of the high-pressure air to complete depolymerization, and falls to the mist chamber body at a preset speed to control the weight of the inorganic powder falling into the mist chamber mechanism per unit time.

[0024] In the technical solution, the air pressure introduced into the suspension and depolymerization pipeline is 0.3-0.5 MPa; and the weight of the inorganic powder falling into the atomization chamber mechanism per unit time is 18-20 kg / min.

[0025] In the technical solution, when the inorganic powder is subjected to drying treatment, the drying temperature is 125 DEG C, and the discharge speed is 18-20 kg / min; when the inorganic powder is subjected to homogenization treatment, the discharge speed is 18-20 kg / min; and when the inorganic powder is subjected to screening treatment and preliminary depolymerization treatment, the inorganic powder with a particle size of 1200-1300 mesh is screened out, and the discharge speed is 18-20 kg / min.

[0026] Compared with the prior art, the inorganic powder surface treatment system and the treatment method using the same have the following advantages: the inorganic powder is subjected to drying, homogenization, screening and preliminary depolymerization by the powder pretreatment mechanism, thereby providing a good basis for subsequent inorganic powder surface treatment processes; the inorganic powder is depolymerized by the depolymerization mechanism, and the weight of the inorganic powder falling into the atomization chamber mechanism per unit time is controlled, so that the inorganic powder can quantitatively fall into the atomization chamber mechanism in a depolymerized state (rather than a lumped state), the inorganic powder in the atomization chamber mechanism is in a good state of being dry, uniform in particle size, free of impurities and depolymerized, the surface treatment agent spraying mechanism can uniformly spray the surface treatment agent on the surface of the inorganic powder, and the inorganic powder with low moisture content and impurity content, high coating rate and uniform coating (the surface coating rate can reach 90%-99%, the surface treatment agent usage is 1%-3%, the Zeta potential is ±32 mV, and the conductivity is 120 mu S / cm) can be obtained after further treatment by the coating mechanism; and the inorganic powder surface treatment system and the treatment method using the same have the advantages of small surface treatment agent usage, high coating rate, low energy consumption and inorganic powder depolymerization. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic diagram of the inorganic powder surface treatment system of the present application.

[0028] Figure 2 FIG. 2 is a step flow chart of the inorganic powder surface treatment method of the present application.

[0029] The reference signs are: 1, feeding mechanism; 11, raw material bin; 12, vacuum pump; 13, vacuum pipeline; 14, meter; 2, powder pretreatment mechanism; 21, drying pipeline; 22, first extrusion screw; 23, first screw motor; 24, first heating device; 25, homogenizing pipeline; 26, second extrusion screw; 27, second screw motor; 201, drying sub-mechanism; 202, homogenizer sub-mechanism; 203, electric sifter mechanism; 3, depolymerization mechanism; 31, suspended depolymerization pipeline; 32, air pressure control device; 33, second heating device; 4, atomization chamber mechanism; 41, atomization chamber body; 42, treatment surface; 5, surface treatment agent spraying mechanism; 51, surface treatment agent storage bin; 52, atomization spray gun; 6, coating mechanism; 61, peg disc body; 62, peg disc driving device; 63, hot air pump; 7, finished product collecting mechanism. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 skilled in the art without creative work fall within the protection scope of the present application.

[0031] The present embodiment provides an inorganic powder surface treatment system for completing the coating process of inorganic powder; the inorganic powder is specifically calcium carbonate, talc, kaolin and wollastonite powder and the like, and the present embodiment takes calcium carbonate as an example, and the coating process (which belongs to a kind of surface treatment process) is specifically to coat surface treatment agent on the surface of inorganic powder.

[0032] Please refer to Figure 1 The inorganic powder surface treatment system of the present embodiment comprises, from top to bottom, powder pretreatment mechanism 2, depolymerization mechanism 3, atomization chamber mechanism 4 and coating mechanism 6, and further comprises surface treatment agent spraying mechanism 5 connected to atomization chamber mechanism 4.

[0033] Among them, the powder pretreatment mechanism 2 is used for at least one of drying, homogenizing, screening and preliminary depolymerization of inorganic powder; the depolymerization mechanism 3 is used for providing a suspended depolymerization space for inorganic powder to depolymerize the inorganic powder and control the weight of inorganic powder falling into the atomization chamber mechanism 4 per unit time; the atomization chamber mechanism 4 is used for providing a surface treatment space for inorganic powder, and the surface treatment agent spraying mechanism 5 can spray surface treatment agent to inorganic powder in the surface treatment space of the atomization chamber mechanism 4; the coating mechanism 6 is used for uniformly coating surface treatment agent on the surface of inorganic powder.

[0034] It should be noted that the powder pretreatment mechanism 2, the disaggregation mechanism 3, the atomization chamber mechanism 4, the coating mechanism 6 and the surface treatment agent spraying mechanism 5 are supported on the floor or the scaffolding in layers to realize the setting structure of the powder pretreatment mechanism 2, the disaggregation mechanism 3, the atomization chamber mechanism 4 and the coating mechanism 6 from top to bottom.

[0035] Specifically, the disaggregation mechanism 3 comprises a suspension disaggregation pipeline 31 for providing a suspension disaggregation space, which is actually a metal pipeline vertically arranged, and the internal space of the pipeline is the suspension disaggregation space; the suspension disaggregation pipeline 31 is provided with a wind pressure control device 32 for introducing high-pressure air into the pipeline and adjusting the wind pressure of the high-pressure air, for example, a proportional valve or an electric control door capable of controlling the opening and closing amount can be used as the wind pressure control device 32, and the wind pressure control device 32 is connected with a high-pressure fan to introduce high-pressure air into the suspension disaggregation pipeline 31 and adjust the wind pressure of the high-pressure air; the inorganic powder can be suspended in the suspension disaggregation pipeline 31 under the action of the high-pressure air to complete disaggregation, and falls to the atomization chamber body 41 at a preset speed to control the weight of the inorganic powder falling into the atomization chamber mechanism 4 per unit time.

[0036] Further, the disaggregation mechanism 3 further comprises a second heating device 33 for heating the suspension disaggregation pipeline 31 (for example, an electric heating pipe or an electric heater surrounding or attached to the surface of the drying pipe 21).

[0037] Further specifically, the length of the suspension disaggregation pipeline 31 is 3.2-3.8 m, and preferably 3.5 m; the wind pressure introduced into the suspension disaggregation pipeline 31 is 0.3-0.5 MPa, and preferably 0.4 MPa.

[0038] Specifically, the atomization chamber mechanism 4 comprises an atomization chamber body 41 for providing a surface treatment space, which is actually a metal chamber in an inverted conical shape vertically arranged, and the internal space of the chamber is the surface treatment space; the suspension disaggregation pipeline 31 of the disaggregation mechanism 3 and the atomization chamber body 41 of the atomization chamber mechanism 4 are sequentially communicated from top to bottom, so that the inorganic powder passing through the suspension disaggregation pipeline 31 can fall into the atomization chamber body 41; the atomization chamber body 41 is provided with a treatment surface 42 for receiving and stopping the inorganic powder, which is actually a plate surface fixedly arranged in the atomization chamber body 41 and inclined to the horizontal plane, and the treatment surface 42 is inclined to the horizontal plane so that it can receive and stop the inorganic powder for a period of time; the surface treatment agent spraying mechanism 5 is connected to the atomization chamber body 41 and can spray the surface treatment agent towards the treatment surface 42, so that the surface treatment agent can uniformly adhere to the surface of the inorganic powder.

[0039] Specifically, the surface treatment agent spraying mechanism 5 comprises a surface treatment agent storage bin 51 and an atomizing spray gun 52, wherein the surface treatment agent storage bin 51 is a metal bin in the shape of an inverted cone, which is used to store the surface treatment agent, and the atomizing spray gun 52 is a spray gun based on the principle of a Venturi atomizer or an ultrasonic atomizer; the atomizing spray gun 52 is connected to the atomizing chamber body 41 of the atomizing chamber mechanism 4 and can draw (by means of an electric pump or a Venturi effect on the atomizing spray gun 52) the surface treatment agent from the surface treatment agent storage bin 51 and spray the surface treatment agent towards the treatment surface 42; in some possible embodiments, the atomizing spray gun 52 can be connected to a heat-conducting medium in its interlayer, and the atomizing spray gun 52 is heated by the heat-conducting medium so that the surface treatment agent can be heated in the atomizing cavity of the atomizing spray gun 52.

[0040] Specifically, the powder pretreatment mechanism 2 comprises, from top to bottom, a drying sub-mechanism 201, a homogenizer sub-mechanism 202 and an electric sieve sub-mechanism 203; the drying sub-mechanism 201 is used to perform drying treatment on the inorganic powder, the homogenizer sub-mechanism 202 is used to perform homogenization treatment on the inorganic powder, and the electric sieve sub-mechanism 203 is used to perform screening and preliminary depolymerization treatment on the inorganic powder.

[0041] In the present embodiment, the drying sub-mechanism 201 comprises a drying pipe 21, a first extrusion screw 22 supported in the drying pipe 21, a first screw motor 23 for driving the first extrusion screw 22, and a first heating device 24 (such as an electric heating pipe or an electric heater surrounding or attached to the surface of the drying pipe 21) for heating the drying pipe 21; the homogenizer sub-mechanism 202 comprises a homogenizing pipe 25, a second extrusion screw 26 supported in the homogenizing pipe 25, and a second screw motor 27 for driving the second extrusion screw 26; in some possible embodiments, the homogenizing pipe 25 can be connected to a heat-conducting medium in its interlayer, and the homogenizing pipe 25 is heated by the heat-conducting medium so that the inorganic powder can be heated in the homogenizing pipe 25.

[0042] Further, the inorganic powder surface treatment system of the present embodiment further comprises a feeding mechanism 1 for quantitatively feeding the inorganic powder to the powder pretreatment mechanism 2; the feeding mechanism 1 comprises a raw material bin 11, a vacuum pump 12 and a metering device 14; wherein the raw material bin 11 is a buried metal bin with a discharge port, which is used to store untreated inorganic powder; the metering device 14 is arranged at the inlet end of the powder pretreatment mechanism 2, and the vacuum pump 12 is connected to the raw material bin 11 through a vacuum pipeline 13 to lift the inorganic powder in the raw material bin 11 to the height of the metering device 14 through the vacuum pipeline 13, and the metering device 14 can quantitatively feed the inorganic powder to the powder pretreatment mechanism 2.

[0043] Specifically, the coating mechanism 6 is a pin disc grinding mechanism for impacting, rubbing and shearing inorganic powder, and actually, the coating mechanism 6 comprises two sets of pin disc bodies 61 opposite to each other and a pin disc driving device 62 (such as a motor and its transmission mechanism) for driving at least one set of pin disc bodies 61 to rotate; in some possible embodiments, the coating mechanism 6 is further provided with a hot air pump 63, through which hot air is introduced into the coating mechanism 6, so as to further dry the inorganic powder.

[0044] Of course, the inorganic powder surface treatment system of the embodiment further comprises a finished product collecting mechanism 7 for collecting the finished inorganic powder after surface treatment, which is a material tower with a discharge port in the embodiment.

[0045] The embodiment also provides an inorganic powder surface treatment method for completing the coating process of inorganic powder, which applies the inorganic powder surface treatment system described above.

[0046] The inorganic powder surface treatment method of the embodiment comprises:

[0047] S0, the untreated inorganic powder is put into the raw material bin 11 through the discharge port, and the air pressure of the vacuum pump 12 is adjusted according to the properties and particle size of the inorganic powder, so that the inorganic powder is transported to the metering device 14 at a speed of 18-20 kg / min, and the metering device 14 quantitatively transports the inorganic powder to the powder pretreatment mechanism 2 at a speed of 18-20 kg / min.

[0048] S1, at least one of drying, homogenizing, screening and preliminary depolymerization is performed on the inorganic powder by the powder pretreatment mechanism 2.

[0049] In this step, the first heating device 24 is used to heat and dry the pipe 21 to dry the moisture on the surface and in the micropores of the inorganic powder, and the first extrusion screw 22 is used to complete the discharging; in this step, the second extrusion screw 26 is used to complete the homogenization and discharging of the inorganic powder, and the homogenization pipe 25 is further used to dry the moisture on the surface and in the micropores of the inorganic powder; the electric sieve mechanism 203 is used to screen the inorganic powder with a predetermined particle size and transport it to the depolymerization mechanism 3.

[0050] Specifically, when the inorganic powder is subjected to drying treatment, the drying temperature is 125℃, and the discharging speed is 18-20 kg / min; when the inorganic powder is subjected to homogenization treatment, the discharging speed is 18-20 kg / min; when the inorganic powder is subjected to screening treatment and preliminary depolymerization treatment, the inorganic powder with a particle size of 1200-1300 mesh is screened, and the discharging speed is 18-20 kg / min.

[0051] S2, the inorganic powder is depolymerized by the depolymerization mechanism 3, and the weight of the inorganic powder falling into the atomization chamber mechanism 4 per unit time is controlled.

[0052] The step specifically includes introducing high-pressure air into the suspension depolymerization pipeline 31 of the depolymerization mechanism 3, adjusting the flow rate of the high-pressure air according to the particle size of the inorganic powder, so that the inorganic powder can be suspended in the suspension depolymerization pipeline 31 under the action of the high-pressure air to complete depolymerization, and fall into the atomization chamber body 41 at a preset speed to control the weight of the inorganic powder falling into the atomization chamber mechanism 4 per unit time.

[0053] Specifically, the air pressure introduced into the suspension depolymerization pipeline 31 is 0.3-0.5 MPa; and the weight of the inorganic powder falling into the atomization chamber mechanism 4 per unit time is specifically 18-20 kg / min.

[0054] S3, spraying the surface treatment agent to the inorganic powder in the atomization chamber mechanism 4 by the surface treatment agent spraying mechanism 5;

[0055] S4, uniformly coating the surface treatment agent on the surface of the inorganic powder by the coating mechanism 6.

[0056] The inorganic powder surface treatment system and the treatment method applying the same of the embodiment, through the powder pretreatment mechanism 2, the inorganic powder is dried, homogenized, screened and preliminarily depolymerized, which provides a good basis for the subsequent inorganic powder surface treatment process, and through the depolymerization mechanism 3, the inorganic powder is depolymerized and the weight of the inorganic powder falling into the atomization chamber mechanism 4 per unit time is controlled, so that the inorganic powder can quantitatively fall into the atomization chamber mechanism 4 in a depolymerized state (rather than a clumped state), the inorganic powder in the atomization chamber mechanism 4 is in a good state of being dry, uniform particle size, no impurities and depolymerized, so that the surface treatment agent spraying mechanism 5 can uniformly spray the surface treatment agent on the surface of the inorganic powder, and after further treatment by the coating mechanism 6, the inorganic powder with low moisture and impurity content, high coating rate and uniform coating (the surface coating rate can reach 90%-99%, the surface treatment agent usage is 1%-3%, the Zeta potential is ±32 mV, and the conductivity is 120 μs / cm) can be obtained, and the inorganic powder surface treatment system and the treatment method applying the same of the embodiment have the advantages of small surface treatment agent usage, high coating rate, low energy consumption and realizing inorganic powder depolymerization.

[0057] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An inorganic powder surface treatment system for completing the coating process of inorganic powders; characterized in that, It includes a powder pretreatment mechanism, a deagglomeration mechanism, an atomization chamber mechanism, and a coating mechanism connected sequentially from top to bottom, and it also includes a surface treatment agent spraying mechanism connected to the atomization chamber mechanism. The powder pretreatment unit is used to perform at least one of the following treatments on the inorganic powder: drying, homogenization, screening, and preliminary deagglomeration, to screen out inorganic powder with a particle size of 1200-1300 mesh; The deagglomeration mechanism is used to provide a suspension and deagglomeration space for the inorganic powder to deagglomerate the inorganic powder and control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time. The atomizing chamber mechanism is used to provide a surface treatment space for the inorganic powder, and the surface treatment agent spraying mechanism is capable of spraying a surface treatment agent onto the inorganic powder in the surface treatment space of the atomizing chamber mechanism; the atomizing chamber mechanism includes an atomizing chamber body for providing the surface treatment space; The coating mechanism is used to uniformly coat the surface treatment agent onto the surface of the inorganic powder; The depolymerization mechanism includes a suspended depolymerization conduit for providing the suspended depolymerization space; The suspension depolymerization pipe is equipped with a wind pressure control device for introducing high-pressure air into itself and adjusting the wind pressure of the high-pressure air. The inorganic powder can be suspended in the suspension depolymerization pipe under the action of the high-pressure air to complete depolymerization and fall into the atomization chamber body at a preset speed to control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time. The length of the suspended depolymerization pipe is 3.2 to 3.8 m, and the air pressure introduced into the suspended depolymerization pipe is 0.3 to 0.5 MPa.

2. The inorganic powder surface treatment system according to claim 1, characterized in that, The suspended depolymerization pipe of the depolymerization mechanism is connected to the atomization chamber body of the atomization chamber mechanism from top to bottom; The atomization chamber body is provided with a processing surface for receiving and holding the inorganic powder; the surface treatment agent spraying mechanism is connected to the atomization chamber body and can spray the surface treatment agent onto the processing surface.

3. The inorganic powder surface treatment system according to claim 2, characterized in that, The surface treatment agent spraying mechanism includes a surface treatment agent storage chamber and an atomizing spray gun; The surface treatment agent storage compartment is used to store surface treatment agents; The atomizing spray gun is connected to the atomizing chamber body of the atomizing chamber mechanism and can draw surface treatment agent from the surface treatment agent storage chamber and spray the surface treatment agent toward the treatment surface.

4. The inorganic powder surface treatment system according to claim 1, characterized in that, The powder pretreatment mechanism includes a drying sub-mechanism, a homogenizer sub-mechanism, and an electric sieve mechanism arranged sequentially from top to bottom; The drying sub-mechanism is used to dry the inorganic powder, the homogenizer sub-mechanism is used to homogenize the inorganic powder, and the electric sieve mechanism is used to screen and perform preliminary deagglomeration on the inorganic powder.

5. The inorganic powder surface treatment system according to claim 1 or 4, characterized in that, It also includes a feeding mechanism for quantitatively feeding the inorganic powder into the powder pretreatment unit; The feeding mechanism includes a raw material silo, a vacuum pump, and a metering device; The raw material silo is used to store the untreated inorganic powder; The metering device is located at the inlet end of the powder pretreatment mechanism. The vacuum pump is connected to the raw material silo through a vacuum pipe to lift the inorganic powder in the raw material silo to the height of the metering device. The metering device can quantitatively deliver the inorganic powder to the powder pretreatment mechanism.

6. The inorganic powder surface treatment system according to claim 1, characterized in that, The coating mechanism is a nail-disc grinding mechanism used for impacting, rubbing, and shearing the inorganic powder.

7. A method for surface treatment of inorganic powders, used to complete the coating process of inorganic powders, characterized in that, The inorganic powder surface treatment system according to any one of claims 1-6 was applied; The inorganic powder surface treatment method includes: S1. The inorganic powder is subjected to at least one of the following treatments through a powder pretreatment mechanism: drying, homogenization, screening, and preliminary deagglomeration. S2. Depolymerize the inorganic powder through the depolymerization mechanism and control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time; S3. Surface treatment agent is sprayed onto the inorganic powder through the surface treatment agent spraying mechanism in the atomization chamber mechanism; S4. The surface treatment agent is uniformly coated onto the surface of the inorganic powder using a coating mechanism.

8. The inorganic powder surface treatment method according to claim 7, characterized in that, Step S2 specifically includes: introducing high-pressure air into the suspension deagglomeration pipe of the deagglomeration mechanism, adjusting the flow rate of the high-pressure air according to the particle size of the inorganic powder, so that the inorganic powder can be suspended in the suspension deagglomeration pipe under the action of the high-pressure air to complete deagglomeration, and fall into the atomization chamber body at a preset speed, so as to control the weight of the inorganic powder falling into the atomization chamber mechanism per unit time.

9. The inorganic powder surface treatment method according to claim 8, characterized in that, The air pressure introduced into the suspended depolymerization pipeline is 0.3–0.5 MPa; The weight of the inorganic powder falling into the atomization chamber mechanism per unit time is specifically 18-20 kg / min.

10. The inorganic powder surface treatment method according to claim 7, characterized in that, When drying the inorganic powder, the drying temperature is 125℃ and the discharge rate is 18-20KG / min; When homogenizing the inorganic powder, the discharge rate is 18-20 kg / min; When the inorganic powder is screened and preliminarily deagglomerated, inorganic powder with a particle size of 1200-1300 mesh is screened out, and the discharge rate is 18-20 kg / min.

Images