A stone paper primary processing ultra-fine grinding device

Abstract

The utility model discloses a kind of stone paper primary processing ultrafine grinding equipment, including air compressor, gas tank, drying machine, airflow mill, cloth bag dust collector and induced draft fan, the raw material inlet of airflow mill is connected screw feeder by pipeline, the feed inlet of screw feeder is installed bin, the feed inlet of bin is connected multistage vibration screen by pipeline, and the inlet of multistage vibration screen is connected grinding machine.The stone paper primary processing ultrafine grinding equipment, crushing process is divided into twice crushing, and inorganic mineral is crushed once by grinding machine, not only can produce certain qualified granularity inorganic mineral, and also can make the internal fine fracture of ore in crushing process, make the crushing of airflow mill more easily, improve the crushing efficiency of airflow mill, reduce the crushing energy consumption of airflow mill.

Description

Technical Field

[0001] This utility model relates to a fine powder grinding device, specifically an ultra-fine grinding device for the initial processing of stone paper. Background Technology

[0002] Stone paper is a new type of environmentally friendly paper. Its raw materials are mainly inorganic minerals, with a small amount of polymer materials and other auxiliary materials. The inorganic mineral powder (core raw material) is mainly calcium carbonate (CaCO3), and may also contain mineral powders such as talc and kaolin. The proportion of mineral powders such as calcium carbonate is usually as high as 70%-80%, which is the "skeleton" of stone paper and gives the paper its basic physical form (such as hardness and stiffness). Utilizing its natural whiteness and opacity, it can replace plant fibers in traditional paper and reduce wood consumption.

[0003] Inorganic minerals require pulverization using a fluidized bed air jet mill. This mill utilizes high-speed airflow to cause fly ash particles to collide, rub, and shear within the pulverizing chamber, thus achieving pulverization. The hardness of the inorganic mineral raw material directly affects the working efficiency of the fluidized bed air jet mill and accelerates equipment wear, requiring frequent maintenance. Lower pulverization efficiency increases compressed air consumption, leading to a significant increase in energy consumption. Therefore, this application is proposed to address the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide an ultrafine grinding device for the initial processing of stone paper, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A stone paper primary processing ultrafine grinding equipment includes an air compressor, an air tank, a dryer, an air jet mill, a bag filter, and an induced draft fan. The raw material inlet of the air jet mill is connected to a screw feeder via a pipeline. A hopper is installed at the feed inlet of the screw feeder. The feed inlet of the hopper is connected to a multi-stage vibrating screen via a pipeline. The feed inlet of the multi-stage vibrating screen is connected to a grinding mill.

[0007] As a further embodiment of this utility model: the multi-stage vibrating screen is divided into two stages of screening. The large-particle material from the first stage screening is sent to the silo through a pipeline, and the small-particle material from the second stage screening is sent to the bag filter dust collector through a pipeline.

[0008] As a further embodiment of this utility model: the air compressor is connected to the air tank through a pipeline, the air in the air tank enters the dryer through a filter, and the air output end of the dryer is connected to the high-pressure gas input end of the air mill through a pipeline.

[0009] As a further embodiment of this utility model: the airflow output end of the airflow mill is connected to the bag filter through a pipeline. The airflow carries raw material powder, which enters the bag filter and is separated. The raw material is filtered out of the bag and discharged from the bottom of the bag filter. The airflow is discharged under the action of the induced draft fan.

[0010] As a further improvement of this utility model: a transfer chamber is installed between the multi-stage vibrating screen and the bag filter, and a star-shaped feeder is provided at the discharge port of the transfer chamber.

[0011] As a further embodiment of this utility model: a Venturi tube is installed on the pipeline between the airflow mill and the bag filter. The airflow medium input end of the Venturi tube is connected to the airflow mill, the throat of the Venturi tube is connected to the connecting transfer chamber, and the diffuser of the Venturi tube is connected to the bag filter.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This stone paper primary processing ultrafine grinding equipment divides the crushing process into two stages. The grinding mill crushes the inorganic minerals in one stage, which not only produces inorganic minerals of a certain qualified particle size, but also causes micro fractures inside the ore during the crushing process, making the air jet mill crushing easier, improving the crushing efficiency of the air jet mill, and reducing the crushing energy consumption of the air jet mill. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an ultrafine grinding equipment for the initial processing of stone paper.

[0015] In the diagram: 1. Air compressor; 2. Air tank; 3. Dryer; 4. Air jet mill; 5. Bag filter; 6. Exhaust fan; 7. Filter; 8. Screw feeder; 9. Hopper; 10. Multi-stage vibrating screen; 11. Grinding mill; 12. Venturi tube; 13. Transfer silo. Detailed Implementation

[0016] Please see Figure 1In this embodiment of the utility model, a stone paper primary processing ultrafine grinding equipment includes an air compressor 1, an air tank 2, a dryer 3, an air jet mill 4, a bag filter 5, and an induced draft fan 6. The raw material inlet of the air jet mill 4 is connected to a screw feeder 8 via a pipeline. A hopper 9 is installed at the feed inlet of the screw feeder 8. The feed inlet of the hopper 9 is connected to a multi-stage vibrating screen 10 via a pipeline. The feed inlet of the multi-stage vibrating screen 10 is connected to a grinding mill 11. The raw material enters the grinding mill 11, where it grinds the raw material. During the grinding process, the ore is subjected to instantaneous impact, causing brittle fracture. This method is suitable for crushing large-particle ores and is the main force for coarse and medium crushing. After passing through the grinding mill 11, the resulting raw material has inconsistent coarseness, partially meeting the requirements. For particle size requirements, some particles are too large. The multi-stage vibrating screen 10 physically screens the raw materials. The primary material screened out has a large particle size, so it is sent to the silo 9 through pipeline. The silo 9 feeds the material to the air jet mill 4 at a uniform speed through the screw feeder 8. After the raw material is crushed by the grinding mill 11, although the crushing does not meet the particle size requirements, there are still minor fractures inside the ore during the crushing process. After entering the air jet mill 4, it is more easily crushed by collision. The particle size of the primary material meets the product requirements and is sent to the bag filter dust collector 5 for recycling. This method can not only reduce the crushing volume of the air jet mill 4, but also coarsely crush inorganic minerals, reduce the strength of inorganic minerals, improve the crushing efficiency of the air jet mill 4 for inorganic minerals, and reduce the energy consumption of the air jet mill 4.

[0017] In a preferred embodiment, the multi-stage vibrating screen 10 is divided into two stages of screening. The large-sized material from the first stage screening is sent to the silo 9 via pipeline, and the small-sized material from the second stage screening is sent to the bag filter 5 via pipeline. The particle size of the ore added to the packaging box varies depending on the purpose of the ore. Calcium carbonate and talc need to be crushed to about 200-300 mesh. The crushed inorganic minerals are screened by the multi-stage vibrating screen 10. The inorganic minerals with qualified particle size enter the bag filter 5 for recovery, and the inorganic minerals larger than the qualified particle size enter the silo 9 and are sent at a constant speed to the air jet mill 4 for secondary crushing.

[0018] In a preferred embodiment, the air compressor 1 is connected to the air tank 2 via a pipeline. The air in the air tank 2 enters the dryer 3 through the filter 7. The air output end of the dryer 3 is connected to the high-pressure gas input end of the air mill 4 via a pipeline. Impurities in the air source, such as moisture, oil, dust, etc., may clog the nozzle or affect the crushing effect, or even contaminate the material. Therefore, a precision air source purification filter 7 device is required.

[0019] In a preferred embodiment, the airflow output end of the airflow mill 4 is connected to the bag filter 5 via a pipeline. The airflow carries raw material powder, which enters the bag filter 5 and is separated. The raw material is filtered out of the bag and discharged from the bottom of the bag filter 5. The airflow is discharged under the action of the induced draft fan 6.

[0020] In a preferred embodiment, a transfer chamber 13 is installed between the multi-stage vibrating screen 10 and the bag filter 5. A star-shaped feeder is provided at the discharge port of the transfer chamber 13. A Venturi tube 12 is installed on the pipeline between the air jet mill 4 and the bag filter 5. The airflow medium input end of the Venturi tube 12 is connected to the air jet mill 4, the throat of the Venturi tube 12 is connected to the transfer chamber 13, and the diffuser of the Venturi tube 12 is connected to the bag filter 5. Using the high-pressure airflow output from the air jet mill 4, the high-pressure airflow enters the Venturi tube 12, forming a negative pressure zone at the throat. The star-shaped feeder conveys the material to the negative pressure zone at a uniform speed. The high-speed flowing airflow draws the material into the airflow and sends it into the bag filter 5.

[0021] It should be noted that all the above embodiments belong to the same utility model concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0022] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stone paper primary processing ultra-fine grinding device, comprising an air compressor (1), an air tank (2), a dryer (3), an air flow mill (4), a bag dust collector (5) and an induced draft fan (6), characterized in that, The raw material inlet of the air jet mill (4) is connected to the screw feeder (8) via a pipeline. The feed inlet of the screw feeder (8) is equipped with a hopper (9). The feed inlet of the hopper (9) is connected to the multi-stage vibrating screen (10) via a pipeline. The feed inlet of the multi-stage vibrating screen (10) is connected to the grinder (11).

2. A stone paper primary processing ultra-fine grinding apparatus according to claim 1, wherein, The multi-stage vibrating screen (10) is divided into two stages of screening. The large-particle material from the first stage screening is sent to the silo (9) through a pipeline, and the small-particle material from the second stage screening is sent to the bag filter (5) through a pipeline.

3. The ultrafine grinding equipment for primary processing of stone paper according to claim 1, characterized in that, The air compressor (1) is connected to the air tank (2) through a pipeline. The air in the air tank (2) enters the dryer (3) through the filter (7). The air output end of the dryer (3) is connected to the high-pressure gas input end of the air mill (4) through a pipeline.

4. The ultrafine grinding equipment for primary processing of stone paper according to claim 1, characterized in that, The airflow output end of the airflow mill (4) is connected to the bag filter (5) through a pipeline. The airflow carries raw material powder, which enters the bag filter (5) and is separated. The raw material is filtered out of the bag and discharged from the bottom of the bag filter (5). The airflow is discharged under the action of the induced draft fan (6).

5. The ultrafine grinding equipment for primary processing of stone paper according to claim 4, characterized in that, A transfer chamber (13) is installed between the multi-stage vibrating screen (10) and the bag filter (5), and a star-shaped feeder is provided at the discharge port of the transfer chamber (13).

6. The ultrafine grinding equipment for primary processing of stone paper according to claim 5, characterized in that, A Venturi tube (12) is installed on the pipeline between the airflow mill (4) and the bag filter (5). The airflow medium input end of the Venturi tube (12) is connected to the airflow mill (4), the throat of the Venturi tube (12) is connected to the connecting transfer chamber (13), and the diffuser of the Venturi tube (12) is connected to the bag filter (5).

Images