A steam-powered powder mill for calendered titanium dioxide film

Abstract

This paper proposes a steam-jet mill for calendered titanium dioxide. The steam-jet mill includes an inlet, an outlet, a wear-resistant top plate, a wear-resistant ring, nozzles, a mill housing, a manhole, a wear-resistant bottom plate, a steam inlet, and a cover plate. The inlet and outlet are located on the cover plate, and the wear-resistant top plate is located below the cover plate and positioned above the wear-resistant ring. The wear-resistant ring is equipped with double-layer nozzles, and the nozzles are set at a certain angle to the wear-resistant ring. The wear-resistant bottom plate is located at the bottom of the wear-resistant ring, and the steam-jet mill housing is located outside the wear-resistant ring. The steam-jet mill housing is equipped with double-layer manholes and a steam inlet. A steam chamber is formed between the steam-jet mill housing and the wear-resistant ring. The wear-resistant ring, wear-resistant top plate, and wear-resistant bottom plate form a pulverizing chamber. High-speed steam is ejected through the double-layer nozzles to efficiently pulverize titanium dioxide, improving the efficiency and quality of titanium dioxide pulverization. This method is suitable for the production and processing of calendered titanium dioxide.

Description

Technical Field

[0001] This article belongs to the technical field of titanium dioxide processing equipment, specifically involving a steam powder mill for calendered titanium dioxide film. Background Technology

[0002] In the production process of titanium dioxide for calendered films, steam powder treatment is a crucial step. The core function of this step is to use steam to act on the titanium dioxide particles, thereby adjusting the particle size distribution, dispersibility and other performance indicators of the titanium dioxide, so that the titanium dioxide can better meet the stringent requirements of calendered film production for pigment performance.

[0003] From the current industry situation, existing steam-powder equipment has many obvious defects. First, in terms of processing efficiency, the internal structure design of many devices is not reasonable enough, and the distribution of steam inside the equipment is very uneven. This results in insufficient and inefficient contact between titanium dioxide particles and steam, making the amount of titanium dioxide that can be effectively processed per unit time very limited, which is difficult to match the pace of large-scale calendered film titanium dioxide production. Second, in terms of titanium dioxide processing effect, due to insufficient contact between steam and titanium dioxide, some titanium dioxide particles cannot be effectively treated by steam, which affects the particle size uniformity and dispersibility of titanium dioxide. When such titanium dioxide is used in calendered film production, it will lead to unstable film quality, such as uneven film surface and uneven color, which seriously restricts the improvement of the quality of calendered film products.

[0004] Therefore, existing steam-powder equipment is insufficient to meet the high-quality and high-efficiency requirements of calendered film titanium dioxide production in terms of processing efficiency and effect. Thus, designing a new type of steam-powder machine with better performance for calendered film titanium dioxide has become an urgent technical problem to be solved in the field of titanium dioxide processing equipment. Utility Model Content

[0005] To address the aforementioned issues, this paper proposes a steam-jet mill for calendered titanium dioxide. The steam-jet mill includes an inlet, an outlet, a wear-resistant top plate, a wear-resistant ring, nozzles, a mill housing, a manhole, a wear-resistant bottom plate, a steam inlet, and a cover plate. The inlet and outlet are located on the cover plate. The wear-resistant top plate is positioned below the cover plate and above the wear-resistant ring. The wear-resistant ring is equipped with double-layered nozzles, which are angled relative to the wear-resistant ring. The bottom of the wear-resistant ring is fitted with a wear-resistant bottom plate, and the steam-jet mill is located on the outer side of the wear-resistant ring. The casing of the steam-powered powder mill is equipped with double-layered hand holes and a steam inlet. A steam chamber is formed between the casing and the wear-resistant ring. The wear-resistant ring, wear-resistant top plate, and wear-resistant bottom plate form a pulverizing chamber. External steam enters the steam chamber through the steam inlet and is evenly distributed to the double-layered nozzles, allowing steam to be sprayed into the pulverizing chamber from different angles, forming a spiral steam flow field. This enhances the contact area and collision frequency between the steam and the titanium dioxide particles, ensuring stable and consistent steam pressure and flow rate at each nozzle.

[0006] The double-layer nozzle has the same number of nozzles in the upper and lower layers, and the upper and lower nozzles are aligned vertically. The distance between two adjacent upper nozzles is equal to the distance between two adjacent lower nozzles. This symmetrical distribution design ensures that the steam forms a uniform energy field in the grinding chamber, avoiding differences in grinding efficiency caused by uneven steam distribution in local areas. At the same time, the vertical correspondence between the upper and lower nozzles allows the ejected steam flow to cross and impact in the longitudinal direction, further improving the dispersion and collision probability of titanium dioxide particles during the grinding process, thereby effectively improving the fineness and uniformity of titanium dioxide grinding.

[0007] The handholes correspond one-to-one with the nozzle positions, enabling quick nozzle replacement. This precise alignment design not only shortens the positioning time during nozzle maintenance but also avoids steam flow field disturbances caused by misalignment.

[0008] The wear-resistant top plate, wear-resistant ring, and wear-resistant bottom plate are all made of high-hardness wear-resistant material, which can effectively reduce the wear of titanium dioxide particles on the top and bottom of the chamber during high-speed movement and extend the service life of the equipment.

[0009] The steam is medium-pressure steam. The steam enters the steam chamber through the steam inlet and then enters the grinding chamber through the nozzle to grind the titanium dioxide. By adjusting the steam pressure and flow rate, the steam velocity and impact force in the grinding chamber can be precisely controlled to meet the requirements of the steam grinding effect of titanium dioxide under different production conditions.

[0010] The upper surface of the wear-resistant base plate is equipped with an annular guide groove, which guides the pulverized titanium dioxide and moves it towards the discharge port. By increasing the curved surface structure of the annular guide groove, the resistance of titanium dioxide particles during the flow process can be reduced, ensuring that the pulverized titanium dioxide can quickly and evenly converge to the discharge port, reducing the problem of local over-pulverization or uneven particle size caused by material retention, and further improving the discharge efficiency and finished product quality stability of titanium dioxide.

[0011] Beneficial effects:

[0012] By setting up a double-layer nozzle, the titanium dioxide is pulverized by the impact force of steam. The double-layer nozzle design allows the steam to cover a wider range in the pulverizing chamber and the impact force to be more uniform and powerful. This enables the titanium dioxide particles to be fully and uniformly refined, ensuring that the titanium dioxide particles can meet the fineness requirements of subsequent production and greatly improving the stability of product quality.

[0013] With the wear-resistant top plate, wear-resistant ring, and wear-resistant bottom plate all made of high-hardness wear-resistant materials, the wear-resistant components can effectively resist the impact and friction of titanium dioxide particles during the titanium dioxide crushing process. This avoids the problem of frequent replacement of components due to wear in traditional equipment, significantly extends the service life of the equipment, and reduces the operating cost of the equipment.

[0014] With double-layered handholes symmetrically arranged on both sides of the gas pulverizer casing, this design allows operators to inspect and maintain the equipment from different angles, greatly reducing the time and labor costs required for equipment maintenance and effectively improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a gas-fired powder mill used for calendered titanium dioxide film.

[0016] Figure 2 This is a top view of a gas-fired powder mill used for calendered titanium dioxide film.

[0017] Figure 3 This is a vertical cross-sectional view of a gas-fired powder mill used for calendered titanium dioxide film.

[0018] Figure 4 This is a horizontal cross-sectional view of a gas-fired powder mill used for calendered titanium dioxide.

[0019] In the diagram: 1. Feed inlet, 2. Discharge outlet, 3. Wear-resistant top plate, 4. Wear-resistant ring, 5. Nozzle, 6. Gas pulverizer housing, 7. Hand hole, 8. Wear-resistant bottom plate, 9. Steam inlet, 10. Cover plate, 11. Steam chamber, 12. Grinding chamber. Detailed Implementation

[0020] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0021] 1. Feed inlet, 2. Discharge outlet, 3. Wear-resistant top plate, 4. Wear-resistant ring, 5. Nozzle, 6. Gas pulverizer housing, 7. Hand hole, 8. Wear-resistant bottom plate, 9. Steam inlet, 10. Cover plate, 11. Steam chamber, 12. Crushing chamber.

[0022] like Figure 1 , 2 As shown in Figures 3 and 4;

[0023] A steam-jet mill for calendered titanium dioxide film, comprising an inlet 1, an outlet 2, a wear-resistant top plate 3, a wear-resistant ring 4, nozzles 5, a mill housing 6, a manhole 7, a wear-resistant bottom plate 8, a steam inlet 9, and a cover plate 10. The inlet 1 and outlet 2 are located on the cover plate 10. The wear-resistant top plate 3 is located below the cover plate 10 and is positioned above the wear-resistant ring 4. The wear-resistant ring 4 has double-layered nozzles 5, with a certain angle between the nozzles 5 and the wear-resistant ring 4. The bottom of the wear-resistant ring 4 has a wear-resistant bottom plate 8. The steam-jet mill housing 6 is located outside the wear-resistant ring 4, and the housing has double-layered manholes 7 and a steam inlet 9. A steam chamber 11 is formed between the steam-jet mill housing 6 and the wear-resistant ring 4. The ring 4, wear-resistant top plate 3, and wear-resistant bottom plate 8 form a crushing chamber 12. The upper and lower layers of the double-layer nozzles 5 have the same number of nozzles, and the upper and lower layers of nozzles 5 are aligned vertically. The distance between two adjacent upper layer nozzles 5 is equal to the distance between two adjacent lower layer nozzles 5. The hand holes 7 correspond one-to-one with the positions of the nozzles 5, thereby enabling quick replacement of the nozzles 5. The wear-resistant top plate 3, wear-resistant ring 4, and wear-resistant bottom plate 8 are all made of high-hardness wear-resistant material. The steam is medium-pressure steam, which enters the steam chamber 11 through the steam inlet 9 and then enters the crushing chamber 12 through the nozzles 5 to crush the titanium dioxide. The upper surface of the wear-resistant bottom plate 8 is provided with an annular guide groove, which guides the crushed titanium dioxide and moves it towards the discharge port 2.

[0024] Implementation example;

[0025] The titanium dioxide to be processed is fed into the crushing chamber 12 through the feed inlet 1. Steam is supplied through the steam inlet 9 and enters the steam chamber 11 through the steam inlet 9. Then, it is sprayed into the crushing chamber 12 through the double-layer nozzle 5. In the crushing chamber 12, the titanium dioxide is crushed by the impact force of the steam. The crushed titanium dioxide is discharged from the discharge port 2. When it is necessary to inspect or maintain the inside of the equipment, it can be operated through the double-layer hand hole 7, thereby realizing the crushing and maintenance of titanium dioxide by the steam powder mill.

[0026] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A steam-powder mill for calendered titanium dioxide film, characterized in that, The gas-pulverized powder mill includes a feed inlet, a discharge outlet, a wear-resistant top plate, a wear-resistant ring, nozzles, a mill housing, a manhole, a wear-resistant bottom plate, a steam inlet, and a cover plate. The feed inlet and discharge outlet are located on the cover plate. The wear-resistant top plate is located below the cover plate and is positioned above the wear-resistant ring. The wear-resistant ring is equipped with double-layer nozzles, and the nozzles are at a certain angle to the wear-resistant ring. The wear-resistant bottom plate is located at the bottom of the wear-resistant ring, and the gas-pulverized powder mill housing is located outside the wear-resistant ring. The gas-pulverized powder mill housing is equipped with double-layer manholes and a steam inlet. A steam chamber is formed between the gas-pulverized powder mill housing and the wear-resistant ring. The wear-resistant ring, the wear-resistant top plate, and the wear-resistant bottom plate form a pulverizing chamber.

2. The steam-powder mill for calendered titanium dioxide as described in claim 1, characterized in that, The double-layer nozzle has the same number of nozzles in the upper and lower layers, and the upper and lower nozzles are aligned vertically. The distance between two adjacent upper nozzles is equal to the distance between two adjacent lower nozzles.

3. A steam-powder mill for calendered titanium dioxide as described in claim 1, characterized in that, The hand holes correspond one-to-one with the nozzle positions, thereby enabling quick nozzle replacement.

4. A steam-powder mill for calendered titanium dioxide as described in claim 1, characterized in that, The wear-resistant top plate, wear-resistant ring, and wear-resistant bottom plate are all made of high-hardness wear-resistant material.

5. A steam-powder mill for calendered titanium dioxide as described in claim 1, characterized in that, The steam is medium-pressure steam. The steam enters the steam chamber through the steam inlet and then enters the pulverizing chamber through the nozzle to pulverize the titanium dioxide.

6. A steam-powder mill for calendered titanium dioxide as described in claim 1, characterized in that, The wear-resistant base plate has an annular guide groove on its upper surface, which guides the crushed titanium dioxide and moves it toward the discharge port.

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