A screening device for separating titanium dioxide from silicon dioxide

Abstract

The utility model discloses a kind of screening equipment for separating titanium dioxide and silicon dioxide, belong to screening equipment field, including the diameter from big to small of three cyclones of intercommunication connection, three cyclones all include feed pipe, the discharge end of feed pipe is intercommunication and is provided with cylinder, cylinder top end is intercommunication and is provided with overflow pipe, cylinder bottom end is intercommunication and is provided with conical cylinder, conical cylinder bottom end is intercommunication and is provided with underflow pipe, located in middle feed pipe and underflow pipe are respectively and intercommunication and are connected with the underflow pipe located above, the feed pipe located below, the number of cyclone located below is several, respectively with the cyclone located in middle intercommunication and are connected, located in middle overflow pipe middle end is intercommunication and is provided with transfer box, transfer box is intercommunication and is connected with the feed pipe located above by conveying pipe.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment, specifically to a screening equipment for separating titanium dioxide and silica. Background Technology

[0002] Titanium dioxide (TiO2) and silicon dioxide (SiO2) are two important inorganic chemical materials with wide applications in industry, daily chemicals, food, and medicine. Although both are white powders, they differ significantly in chemical properties, physical characteristics, and uses. While both are white functional materials, titanium dioxide's core value lies in its optical properties, possessing excellent hiding power, whiteness, weather resistance, and chemical stability. It is widely used in coatings, plastics, papermaking, and cosmetics, and is the world's most widely used white pigment. Silicon dioxide, on the other hand, is valued for its physical modification properties, including adsorption, reinforcement, and thixotropy, and has wide applications in rubber, coatings, food, and electronics.

[0003] In industrial production, the separation of titanium dioxide (TiO2) from silicon dioxide (SiO2) is an important process, especially in mineral purification, waste recycling, or the preparation of specific materials.

[0004] In the separation process of titanium dioxide (TiO2) and silicon dioxide (SiO2), traditional equipment includes hydrocyclones for separating titanium dioxide and silicon dioxide. However, single-stage hydrocyclones have insufficient separation accuracy, while multi-stage hydrocyclones have the problem that the final separation cannot keep up with the flow rate of the previous stages due to the change in the diameter of the cyclone from large to small, resulting in low efficiency. Utility Model Content

[0005] To address the issues of insufficient separation accuracy in single-stage hydrocyclones and low efficiency in multi-stage hydrocyclones due to the decreasing diameter of the cyclones, this invention provides a screening device for separating titanium dioxide and silica.

[0006] A screening device for separating titanium dioxide from silica includes three hydrocyclones with diameters ranging from large to small, all connected in communication. Each hydrocyclone includes a feed pipe, and a cylinder is connected to the outlet end of the feed pipe. An overflow pipe is connected to the top of the cylinder, and a conical cylinder is connected to the bottom end of the cylinder. An underflow pipe is connected to the bottom end of the conical cylinder. The middle feed pipe and underflow pipe are connected to the upper underflow pipe and the lower feed pipe, respectively. There are several hydrocyclones located at the bottom, each connected to one of the middle hydrocyclones. A transfer box is connected to the middle end of the middle overflow pipe, and the transfer box is connected to the upper feed pipe via a conveying pipe.

[0007] More preferably, it also includes a workbench, with several support frames fixedly installed on the top wall of the workbench and a horizontal plate fixedly installed at the bottom of the workbench. The three hydrocyclones include a first-stage hydrocyclone, a second-stage hydrocyclone, and a third-stage hydrocyclone. The first-stage and second-stage hydrocyclones are embedded in the support frames, and the third-stage hydrocyclone is embedded in the horizontal plate. A buffer tank is also embedded in the top wall of the workbench.

[0008] More preferably, the top of the buffer tank is connected to the underflow pipe of the secondary hydrocyclone, and there are six sets of tertiary hydrocyclones, which are evenly arranged on the outside of the buffer tank. The feed pipe of each set of tertiary hydrocyclones is connected to the bottom of the buffer tank.

[0009] More preferably, the bottom end of the overflow pipe is located inside the cylinder, and the top end of the overflow pipe penetrates the top wall of the cylinder and is fixedly located on the outside. The conical cylinder is integrally formed with the cylinder, and the cylinder diameter and conical cone angle in the first-stage hydrocyclone, second-stage hydrocyclone and third-stage hydrocyclone are set from large to small.

[0010] More preferably, the transfer box is fixedly installed on the top of the support frame, the bottom end of the conveying pipe is connected to the inside of the transfer box, the top end of the conveying pipe is connected to the feed pipe in the first-stage hydrocyclone, a water pump is installed in the conveying pipe, and a flow regulating valve is installed in the underflow pipe of each of the three hydrocyclones.

[0011] More preferably, a number of overflow receiving boxes are fixedly installed on the top wall of the horizontal plate, and the number of overflow receiving boxes are respectively installed below the overflow pipe in the three-stage hydrocyclone. A mineral receiving box is installed below the horizontal plate, and the mineral receiving box is installed below the six three-stage hydrocyclones.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: after the mixed raw materials are separated by three stages of hydrocyclones with diameters ranging from large to small, high-purity titanium dioxide can be obtained, while the overflow is fine silica tailings, which can be used as filler after subsequent drying. The separation effect of three stages of hydrocyclones is better than that of single-stage separation, and higher-purity titanium dioxide can be obtained. Moreover, multiple three-stage hydrocyclones correspond to one first-stage hydrocyclone and one second-stage hydrocyclone, which can ensure that the downstream receiving volume can accept the upstream flow while achieving the separation function, thus avoiding blockage. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a top view of the three-stage cyclone separator 14 of this utility model;

[0015] Figure 3 This is a schematic diagram of part A of the structure of this utility model;

[0016] Figure 4 This is a schematic diagram of part B of the structure of this utility model.

[0017] In the diagram: 1. Hydrocyclone; 2. Feed pipe; 3. Cylinder; 4. Overflow pipe; 5. Conical cylinder; 6. Underflow pipe; 7. Transfer box; 8. Conveying pipe; 9. Workbench; 10. Support frame; 11. Horizontal plate; 12. Primary hydrocyclone; 13. Secondary hydrocyclone; 14. Tertiary hydrocyclone; 15. Buffer tank; 16. Water pump; 17. Flow regulating valve; 18. Overflow receiving box; 19. Mineral receiving box. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, some of the aforementioned terms, besides indicating location or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances. Additionally, the term "multiple" should mean two or more.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The following will refer to the accompanying drawings. Figures 1-4 The present invention will be described in detail with reference to the embodiments.

[0023] A screening device for separating titanium dioxide from silica includes three hydrocyclones 1 connected in descending order of diameter, and a workbench 9. Several support frames 10 are fixedly installed on the top wall of the workbench 9, and a horizontal plate 11 is fixedly installed at the bottom of the workbench 9. The three hydrocyclones 1 include a primary hydrocyclone 12, a secondary hydrocyclone 13, and a tertiary hydrocyclone 14. The primary hydrocyclone 12 and the secondary hydrocyclone 13 are embedded in the support frames 10, and the tertiary hydrocyclone 14 is embedded in the horizontal plate 11. A buffer tank 15 is also embedded in the top wall of the workbench 9.

[0024] The first-stage hydrocyclone 12 is a large-diameter hydrocyclone (e.g., Φ100mm~Φ50mm) for rapid separation of coarse particles (e.g., SiO2 >20μm). The second-stage hydrocyclone 13 is a medium-diameter hydrocyclone (e.g., Φ30mm~Φ20mm) for processing intermediate-sized particles. The third-stage hydrocyclone 14 is a small-diameter hydrocyclone (e.g., Φ10mm~Φ5mm) for extracting ultrafine target particles (e.g., TiO2 <5μm). By setting up three stages of hydrocyclones 1, the raw material can be sequentially separated by the three hydrocyclones, ultimately yielding coarse silica particles and ultrafine titanium dioxide particles.

[0025] Each of the three hydrocyclones 1 includes a feed pipe 2, and a cylindrical tube 3 is connected to the discharge end of the feed pipe 2. A conical tube 5 is connected to the bottom end of the cylindrical tube 3. The conical tube 5 and the cylindrical tube 3 are integrally formed. The diameter of the cylindrical tube 3 and the cone angle of the conical tube 5 in the first-stage hydrocyclone 12, the second-stage hydrocyclone 13 and the third-stage hydrocyclone 14 are set from large to small. An underflow pipe 6 is connected to the bottom end of the conical tube 5. A flow regulating valve 17 is installed in the underflow pipe 6 of each of the three hydrocyclones 1.

[0026] The raw materials are tangentially fed into the cylinder 3 from the feed pipe 2, forming a swirling field inside the cylinder 3. The materials are centrifugally distributed downwards along the conical cylinder 5, causing the light phase or fine particles to overflow along the overflow pipe 4. The flow regulating valve 17 is opened, and the heavy phase or coarse particles are discharged along the underflow pipe 6 into the feed pipe 2 of the corresponding next-stage hydrocyclone 1.

[0027] An overflow pipe 4 is connected to the top of the cylinder 3. The bottom of the overflow pipe 4 is located inside the cylinder 3, and the top of the overflow pipe 4 penetrates the top wall of the cylinder 3 and is fixedly located on the outside. Light phase or fine particles overflow from the overflow pipe 4 to the outside and are collected separately.

[0028] The primary hydrocyclone 12, the secondary hydrocyclone 13, and the tertiary hydrocyclone 14 can perform multi-stage hydrocyclone separation on the raw materials, resulting in higher purity titanium dioxide.

[0029] The feed pipe 2 and underflow pipe 6 located in the middle are connected to the underflow pipe 6 located above and the feed pipe 2 located below, respectively. The overflow pipe 4 located in the middle is connected to the transfer box 7. The transfer box 7 is connected to the feed pipe 2 located above through the conveying pipe 8. The transfer box 7 is fixedly installed at the top of the support frame 10. The bottom end of the conveying pipe 8 is connected to the inside of the transfer box 7. The top end of the conveying pipe 8 is connected to the feed pipe 2 in the first-stage hydrocyclone 12. A water pump 16 is installed in the conveying pipe 8.

[0030] Fine particles overflowing from the overflow pipe 4 in the middle flow into the transfer box 7. The water pump 16 is turned on, allowing the fine particles to return to the feed pipe 2 in the first-stage hydrocyclone 12 through the conveying pipe 8 for repeated separation, resulting in cleaner separation. The heavy particles flow along the underflow pipe 6 to the buffer tank 15 below.

[0031] There are several hydrocyclones 1 located at the bottom, which are connected to the hydrocyclone 1 located in the middle. The top of the buffer tank 15 is connected to the underflow pipe 6 of the secondary hydrocyclone 13. There are six groups of tertiary hydrocyclones 14, which are evenly arranged on the outside of the buffer tank 15. The feed pipe 2 of each group of tertiary hydrocyclones 14 is connected to the bottom of the buffer tank 15.

[0032] Each feed pipe 2 is equipped with a pressure stabilizing pump. By adjusting the pressure, the raw material can smoothly pass through the feed pipe 2 into the cylinder 3 in the hydrocyclone 1. The buffer tank 15 can simultaneously divert the flow to the six feed pipes 2, and then they enter the six sets of three-stage hydrocyclones 1 respectively for the finest level of separation. This avoids the problem of blockage caused by the flow of the secondary hydrocyclone 13 not being able to receive the flow during separation.

[0033] Several overflow receiving boxes 18 are fixedly installed on the top wall of the horizontal plate 11. The several overflow receiving boxes 18 are respectively located below the overflow pipe 4 in the three-stage hydrocyclone 14. Mineral receiving boxes 19 are installed below the horizontal plate 11. The mineral receiving boxes 19 are located below the six three-stage hydrocyclones 14.

[0034] The silica overflowing from the overflow pipe 4 is collected inside the six overflow receiving boxes 18, while the separated titanium dioxide is collected in the mineral receiving box 19.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A screening device for separating titanium dioxide from silica, comprising three hydrocyclones (1) connected in descending order of diameter, characterized in that: Each of the three hydrocyclones (1) includes a feed pipe (2). The discharge end of the feed pipe (2) is connected to a cylinder (3). The top of the cylinder (3) is connected to an overflow pipe (4). The bottom of the cylinder (3) is connected to a conical cylinder (5). The bottom of the conical cylinder (5) is connected to an underflow pipe (6). The feed pipe (2) and the underflow pipe (6) in the middle are connected to the underflow pipe (6) above and the feed pipe (2) below, respectively. There are several hydrocyclones (1) in the lower part, which are connected to the hydrocyclones (1) in the middle. The middle overflow pipe (4) in the middle is connected to a transfer box (7). The transfer box (7) is connected to the feed pipe (2) above through a conveying pipe (8).

2. The screening device for separating titanium dioxide and silica according to claim 1, characterized in that: It also includes a workbench (9), with several support frames (10) fixedly installed on the top wall of the workbench (9), and a horizontal plate (11) fixedly installed at the bottom of the workbench (9). The three hydrocyclones (1) include a first-stage hydrocyclone (12), a second-stage hydrocyclone (13) and a third-stage hydrocyclone (14). The first-stage hydrocyclone (12) and the second-stage hydrocyclone (13) are both embedded in the support frames (10), and the third-stage hydrocyclone (14) is embedded in the horizontal plate (11). A buffer tank (15) is also embedded in the top wall of the workbench (9).

3. The screening device for separating titanium dioxide and silica according to claim 2, characterized in that: The top of the buffer tank (15) is connected to the underflow pipe (6) of the secondary hydrocyclone (13). There are six sets of tertiary hydrocyclones (14), which are evenly arranged on the outside of the buffer tank (15). The feed pipe (2) of each set of tertiary hydrocyclones (14) is connected to the bottom of the buffer tank (15).

4. The screening device for separating titanium dioxide and silica according to claim 3, characterized in that: The bottom end of the overflow pipe (4) is set inside the cylinder (3), and the top end of the overflow pipe (4) penetrates the top wall of the cylinder (3) and is fixedly set on the outside. The conical cylinder (5) is integrally formed with the cylinder (3). The diameter of the cylinder (3) and the cone angle of the conical cylinder (5) in the first-stage hydrocyclone (12), the second-stage hydrocyclone (13) and the third-stage hydrocyclone (14) are set from large to small.

5. The screening device for separating titanium dioxide and silica according to claim 4, characterized in that: The transfer box (7) is fixedly installed at the top of the support frame (10). The bottom end of the conveying pipe (8) is connected to the inside of the transfer box (7). The top end of the conveying pipe (8) is connected to the feed pipe (2) in the first-stage hydrocyclone (12). A water pump (16) is installed in the conveying pipe (8). A flow regulating valve (17) is installed in the underflow pipe (6) of each of the three hydrocyclones (1).

6. The screening device for separating titanium dioxide and silica according to claim 5, characterized in that: Several overflow receiving boxes (18) are fixedly installed on the top wall of the horizontal plate (11). The overflow receiving boxes (18) are respectively installed below the overflow pipe (4) in the three-stage hydrocyclone (14). A mineral receiving box (19) is installed below the horizontal plate (11). The mineral receiving box (19) is installed below the six three-stage hydrocyclones (14).

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