Titanium dioxide kiln falling primary product particle rolling device

Abstract

The utility model relates to the field of titanium dioxide kiln falling primary product particle grinding, in particular to a titanium dioxide kiln falling primary product particle rolling device which comprises a first roller body and a second roller body which are oppositely arranged, the first roller body and the second roller body are in the shape of a conical table, and the first roller body and the second roller body are arranged in a central symmetry mode. And the adjusting mechanism is respectively in shaft connection with the first roller body and the second roller body and is used for driving the first roller body and the second roller body to rotate oppositely and move in a staggered manner along the axial direction of the roller bodies so as to adjust the distance between the rollers. The roller bodies are arranged to be in the shape of the conical table, so that the roller distance between the two roller bodies can be adjusted by adjusting the relative positions of the two roller bodies in a staggered mode, the control process is simple and linear, and the roller press can adapt to rolling and grinding of primary product particles of different grades; and dynamic adjustment can be carried out in the operation process to realize continuous production, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of grinding primary-product particles of titanium dioxide falling kiln, in particular to a roller pressing device for primary-product particles of titanium dioxide falling kiln. Background Art

[0002] In the sulfuric acid process, a major factor affecting titanium dioxide's hiding power, gloss, and other properties is the dispersion of the titanium dioxide particles. The dispersion of titanium dioxide particles is primarily controlled by two steps: the intermediate powdering process before titanium dioxide surface treatment and the airflow milling process after surface treatment. The intermediate powdering process plays a decisive role in the dispersion of titanium dioxide. If the initial particles are not completely crushed in the intermediate powdering process, the larger intermediate powder particles will be difficult to further pulverize in subsequent steps, thus affecting the final dispersion effect.

[0003] The traditional medium powder stage is generally achieved by roller grinding. However, since the roller spacing of the traditional roller pressing device is difficult to adjust, it is even more impossible to adjust the roller spacing during operation, making it impossible to adjust according to the grade of the primary particles during the crushing process. During the roller pressing process, small particles cannot be effectively roller-ground due to the inappropriately large roller spacing, resulting in the small particles still entering the next beating stage in the form of agglomerates, thus affecting the final dispersibility. Utility Model Content

[0004] In order to improve the crushing particle size and uniformity of primary particles in the intermediate powder stage and improve production efficiency, the first aspect of the present invention proposes a titanium dioxide kiln primary particle rolling device, comprising: a first roller and a second roller arranged opposite to each other, wherein the first roller and the second roller are in the shape of a conical table, and the first roller and the second roller are arranged symmetrically about the center; an adjustment mechanism axially connected to the first roller and the second roller respectively, the adjustment mechanism is used to drive the first roller and the second roller to rotate toward each other and move offset along the axial direction of the roller to adjust the roller spacing.

[0005] In one or more embodiments, the titanium dioxide kiln primary product particle rolling device of the present invention also includes: a shell, which is a square bucket shape, with a rectangular feed port on the top and a rectangular discharge port on the bottom, and an elastic hole is provided on each side wall corresponding to the axial direction of the roller body to form a channel when the first roller body and the second roller body move in an axially displaced manner.

[0006] In one or more embodiments, the axial lengths of the first roller body and the second roller body are equal to and greater than the length of the shell.

[0007] In one or more embodiments, the axial length of the first roller body is greater than the axial length of the second roller body, and the axial length of the second roller body is equal to the length of the shell; wherein, the first roller body is configured to be controlled by the adjustment mechanism to move along the axial offset to adjust the roller spacing.

[0008] In one or more embodiments, the titanium dioxide kiln primary product particle rolling device of the present invention also includes: a material baffle plate, one end of which is rotatably connected to the rectangular feed port of the shell, and the other end abuts against the highest point of the first roller body or the second roller body.

[0009] In one or more embodiments, the titanium dioxide kiln primary product particle rolling device of the present invention also includes: a conveying mechanism, which is arranged below the rectangular discharge port of the shell, and is used to receive and screen the material particles, and re-transmit the remaining physical particles into the shell.

[0010] In one or more embodiments, the conveying mechanism includes: a conveying motor; and a conveying mesh belt, wherein the surface of the conveying mesh belt is a mesh surface.

[0011] In one or more embodiments, the titanium dioxide kiln primary product particle rolling device of the present invention further includes: a collection bin, which is arranged at the lower part of the conveyor belt and is used to collect qualified crushed materials.

[0012] In one or more embodiments, the length and width of the collecting bin are greater than the length and width of the vertical projection of the conveyor belt.

[0013] In one or more embodiments, a rolling wheel set is further provided at the bottom of the aggregate bin.

[0014] The beneficial effects of the utility model include: the utility model provides a titanium dioxide kiln primary product particle rolling device which is convenient for adjusting the roller spacing, and realizes the separation of the screened material particles and the qualified material particles by setting a transmission mechanism, and re-sends the screened material particles into the shell for adjusting the roller spacing for step-by-step crushing, thereby ensuring the crushing particle size and uniformity of the primary product particles in the intermediate powder link. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0016] Figure 1This is a schematic structural diagram of a first-state device for rolling titanium dioxide primary product particles in a falling kiln according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic structural diagram of a second state of a titanium dioxide falling kiln primary product particle roller pressing device according to an embodiment of the present utility model;

[0018] Figure 3 This is a structural schematic diagram of a first shell embodiment of a titanium dioxide falling kiln primary product particle rolling device of the present utility model;

[0019] Figure 4 This is a structural schematic diagram of an embodiment of a second shell of a titanium dioxide falling kiln primary product particle roller pressing device according to the present invention;

[0020] Figure 5 This is a schematic structural diagram of a titanium dioxide drop kiln primary product particle roller pressing device with a conveying mechanism according to the present invention;

[0021] Figure 6 This is a schematic structural diagram of a titanium dioxide drop kiln primary product particle roller pressing device with a conveying mechanism and a collection bin of the present invention;

[0022] Figure 7 This is a workflow diagram of a method for rolling titanium dioxide primary product particles in a falling kiln according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0025] In order to improve the crushing size and uniformity of primary particles in the intermediate powder stage and improve production efficiency, the utility model proposes an embodiment of a titanium dioxide falling kiln primary particle roller pressing device, such as Figure 1 As shown, it includes: a first roller body 10 and a second roller body 20 arranged opposite to each other, wherein the first roller body 10 and the second roller body 20 are in the shape of a cone, and the first roller body 10 and the second roller body 20 are arranged symmetrically with respect to the center; an adjustment mechanism 30 (not shown) axially connected to the first roller body and the second roller body, respectively, and the adjustment mechanism 30 is used to drive the first roller body 10 and the second roller body 20 to rotate toward each other and move in an axial direction of the roller body to adjust the roller spacing.

[0026] In this embodiment, the utility model sets the roller body in a conical shape, so that the roller spacing between the two roller bodies can be adjusted by adjusting the relative positions of the two roller bodies by offsetting. Figure 2 As shown, compared with Figure 1 The roller spacing D1 shown, Figure 2 The roller spacing D2 shown is smaller than D1. The control process is simple and linear, which can adapt to roller grinding of different grades of primary particles and can be dynamically adjusted during operation for continuous production, thereby improving production efficiency.

[0027] In a further embodiment, in order to avoid the scattering of primary product particles and to improve the pulverization efficiency, as Figure 3 As shown, the titanium dioxide kiln primary product particle rolling device of the present invention also includes a shell 40, which is a square bucket shape, with a rectangular feed port 41 on the top and a rectangular discharge port 42 on the bottom, and an elastic hole 43 is provided on each side wall corresponding to the axial direction of the roller body to form a channel when the first roller body 10 and the second roller body 20 move in an axially displaced manner.

[0028] In this embodiment, the shell 40, the first roller body 10 and the second roller body 20 form a semi-enclosed material storage space, which can effectively prevent material particles from sliding off the side of the roller body during rolling and increase the amount of disposable filler, thereby improving the crushing efficiency.

[0029] In a further embodiment, the axial lengths of the first roller body 10 and the second roller body 20 are equal to and greater than the length of the shell.

[0030] In this embodiment, in order to prevent material leakage from the bottom of the storage space formed by the roller bodies and the shell 40 during the misaligned movement of the first roller body 10 and the second roller body 20, and to ensure that material particles can only be discharged from the gap between the rollers, in this embodiment, the axial lengths of the first roller body 10 and the second roller body 20 are designed to be equal and greater than the length of the shell, so that the two ends of the first roller body 10 and the second roller body 20 will not completely separate from the shell 40 during the movement, and in order to adapt to the diameter changes of the first roller body 10 and the second roller body 20, elastic holes 43 are provided to ensure sealing.

[0031] In an optional embodiment, the first roller and the second roller are controlled separately, and optionally, when adjusting the roller spacing, only one roller is controlled to move in an offset manner.

[0032] In another optional embodiment, the axial length of the first roller body 10 is greater than the axial length of the second roller body 20, and the axial length of the second roller body 20 is equal to the length of the shell 40; wherein the first roller body 10 is configured to be controlled by an adjustment mechanism 30 (not shown) to move in an axial offset manner to adjust the roller spacing.

[0033] In this embodiment, the adjustment mechanism 30 can only control the displacement of one roller relative to the other roller, so it is only necessary to ensure that the length of one roller is greater than the length of the housing 40. Compared with the previous embodiment, this embodiment helps to simplify the structure of the adjustment mechanism 30, reduce the failure rate, and reduce the difficulty of subsequent maintenance.

[0034] In further embodiments, see Figure 4 The titanium dioxide kiln primary product particle rolling device of the present invention also includes: a baffle plate 50, one end of which is rotatably connected to the rectangular feed port 41 of the shell, and the other end abuts the highest point of the first roller body 10 or the second roller body 20.

[0035] In this embodiment, the function of the material baffle plate 50 is to prevent material particles from accumulating in the recessed portion formed by the two sides of the roller body and the shell 40, thereby preventing these material particles from being effectively rolled and ground, thereby improving the utilization rate of the material particles; the purpose of designing the rotating connection of the material baffle plate 50 is to facilitate the subsequent cleaning of the interior of the shell.

[0036] In further embodiments, see Figure 5 The titanium dioxide kiln primary product particle rolling device of the present invention further includes a conveyor mechanism 60, which is disposed below the rectangular discharge port 42 of the housing and is used to receive and screen the material particles and re-transfer the remaining physical particles to the housing 40. The conveyor mechanism 60 includes a conveyor motor 61 (not shown) and a conveyor mesh belt 62, the surface of which is a mesh.

[0037] In this embodiment, the conveying mechanism 60 can not only re-enter the residual material particles into the shell 40 after the roller spacing is adjusted for repeated crushing, but also use the vibration of the conveyor belt during the conveying process to screen out qualified material particles, thereby preventing qualified material particles from re-entering the shell 40 and affecting the further crushing of the residual material particles, thereby ensuring the crushing effect.

[0038] In further embodiments, see Figure 6 The titanium dioxide kiln primary product particle rolling device of the present invention further includes: a collection bin 70, which is arranged at the lower part of the conveyor belt 62 for collecting qualified crushed materials.

[0039] In one embodiment, the length and width of the collection bin 70 are greater than the length and width of a vertical projection of the conveyor belt 62 .

[0040] In one or more embodiments, a rolling wheel set (not shown) is further provided at the bottom of the collecting bin 70 .

[0041] Through the above embodiments, the utility model provides a titanium dioxide kiln primary product particle rolling device that is convenient for adjusting the roller spacing, and realizes the separation of the screened material particles and the qualified material particles by setting the conveying mechanism 60, and sends the screened material particles back into the shell for adjusting the roller spacing for step-by-step crushing, thereby ensuring the crushing particle size and uniformity of the primary product particles in the intermediate powder link.

[0042] In one embodiment, the above-mentioned titanium dioxide kiln primary product particle rolling device is used as follows:

[0043] Step S1: setting the initial roller spacing between the first roller and the second roller through an adjustment mechanism according to the maximum particle size of the target titanium dioxide primary product particles;

[0044] Specifically, before crushing the target titanium dioxide primary particles coming out of the kiln, a portion of the sample is first sieved to determine the particle size, such as 5-8 mm, 4-7 mm, 1-3 mm, and less than 1 mm. Then, based on the maximum particle size, such as 5-8 mm, the initial roller spacing between the first roller and the second roller is set to 5 mm. In this way, during the crushing process, the 5-8 mm material particles are crushed first, and the particles of the remaining sizes fall onto the conveyor mesh belt, which then returns the sieved material particles to the housing 40 for crushing.

[0045] In an optional embodiment, during the process of adjusting the roller spacing, one may choose to adjust only the offset distance of one roller, or adjust the offset distances of both rollers simultaneously. The former has higher adjustment accuracy, while the latter can achieve rapid adjustment.

[0046] Step S2: setting an adjustment step size and an adjustment time of the adjustment mechanism, and after the adjustment time, the adjustment mechanism adjusts the offset distance between the first roller and the second roller according to the preset step size to gradually crush the target titanium dioxide primary product particles;

[0047] Specifically, the adjustment step size is set according to the particle grade of the target titanium dioxide primary product particles coming out of the kiln; for example, the step size is set to 2 mm according to the four particle grades in the aforementioned embodiment, that is, the roller spacing is reduced by two mm after each adjustment period; the adjustment period is set according to the length and conveying speed of the conveyor belt of the adjustment mechanism, that is, the conveying time it takes for all the screened materials to be returned to the roller body.

[0048] In an optional embodiment, different adjustment steps are set according to the particle size of the material to be ground, such as setting the adjustment step to 2 mm in the range of 3-8 mm and setting the adjustment step to 1 mm or smaller for particles below 3 mm.

[0049] Step S3: The secondary titanium dioxide primary product particles after screening are returned to the shell through the conveyor belt for repeated crushing and grinding until all the target titanium dioxide primary product particles are screened out.

[0050] Through the above method embodiment, the utility model can realize the step-by-step crushing of primary particles mixed with different particle grades, and can work continuously without stopping to readjust the roller spacing, and can ensure the uniformity and crushing particle size of the material particles to improve the quality of subsequent processes.

[0051] The above are exemplary embodiments disclosed herein, but it should be noted that various changes and modifications may be made without departing from the scope of the present invention as defined in the claims. The functions, steps, and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order.

[0052] The serial numbers of the embodiments disclosed in the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0053] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the disclosure of the present invention (including the claims) to these examples. Based on the principles of the present invention, the technical features of the above embodiments or different embodiments may be combined, and there are many other variations of the various aspects of the above embodiments, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A titanium dioxide kiln primary product particle roller pressing device, characterized in that: include: A first roller and a second roller are arranged opposite to each other, wherein the first roller and the second roller are in the shape of a cone and are centrally symmetrically arranged; An adjustment mechanism is axially connected to the first roller body and the second roller body respectively, and is used to drive the first roller body and the second roller body to rotate toward each other and move in an offset manner along the axial direction of the roller body to adjust the roller spacing.

2. The titanium dioxide kiln primary product particle roller pressing device according to claim 1, characterized in that: It also includes a shell, which is square bucket-shaped, with a rectangular feed port on the top and a rectangular discharge port on the bottom, and an elastic hole on each side wall corresponding to the axial direction of the roller body to form a channel for the first roller body and the second roller body to move in an axially displaced manner.

3. The titanium dioxide falling kiln primary product particle rolling device according to claim 2, characterized in that: The axial lengths of the first roller body and the second roller body are equal and greater than the length of the shell.

4. The titanium dioxide falling kiln primary product particle rolling device according to claim 2, characterized in that: The axial length of the first roller body is greater than the axial length of the second roller body, and the axial length of the second roller body is equal to the length of the shell; Wherein, the first roller body is configured to be controlled by the adjustment mechanism to move in an axial offset manner to adjust the roller spacing.

5. The titanium dioxide falling kiln primary product particle rolling device according to claim 2, characterized in that: Also includes: A material baffle plate, one end of which is rotatably connected to the rectangular feed port of the shell, and the other end of which abuts against the highest point of the first roller body or the second roller body.

6. The titanium dioxide falling kiln primary product particle rolling device according to claim 2, characterized in that: Also includes: The conveying mechanism is arranged below the rectangular discharge port of the shell, and is used to receive and screen material particles and re-transmit the physical particles remaining on the screen into the shell.

7. The titanium dioxide falling kiln primary product particle rolling device according to claim 6, characterized in that: The transmission mechanism comprises: conveyor motor; and The conveyor mesh belt has a mesh surface.

8. The roller pressing device for primary titanium dioxide particles in a falling kiln according to claim 7, characterized in that: Also includes: The collecting bin is arranged at the lower part of the conveyor belt and is used to collect qualified crushed materials.

9. The titanium dioxide falling kiln primary product particle rolling device according to claim 8, characterized in that: The length and width of the aggregate bin are greater than the length and width of the vertical projection of the conveyor belt.

10. The roller pressing device for primary titanium dioxide particles in a falling kiln according to claim 8, characterized in that: A rolling wheel set is also provided at the bottom of the aggregate bin.

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