A method for finely crushing ceramic raw materials

Abstract

The invention relates to a method for finely crushing ceramic raw materials. When finely crushing soft materials by means of finely crushing equipment, a scraper on the roller surface of the finely crushing equipment can scrape off the soft materials adhering to the roller surface to avoid interference of the soft materials with the roller surface in crushing the materials, thereby achieving a better finely crushing effect. At the same time, for the finely crushed soft materials, the materials are scattered and divided into two screening devices for simultaneous screening, thereby avoiding the phenomenon that too much soft materials in a single screening device are compacted and adhered to the screening surface of the screening device, and the finely crushing effect is better. At the same time, the screening efficiency is also improved by setting up two screening devices. Compared with the finely crushing process in the prior art which can only be applied to hard raw materials and cannot achieve a better finely crushing effect for soft raw materials, the finely crushing process provided by the invention can be applied to soft ceramic raw materials in addition to hard ceramic raw materials, thereby achieving a better finely crushing effect for soft raw materials and improving the finely crushing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mineral processing, and in particular to a method for finely crushing ceramic raw materials. Background Art

[0002] There are many kinds of ceramic raw materials, mainly including silicate minerals such as kaolin, feldspar, mica, and a small amount of cordierite, transition metal oxides, diatomaceous earth, etc. Ceramic raw materials can be divided into hard raw materials and soft raw materials according to Mohs hardness. Before grinding the ceramic raw materials into powder, it is necessary to first carry out a fine crushing process of the ceramic raw materials, that is, to crush the ceramic raw materials into particles with a diameter less than a certain value (such as less than 2mm). In the prior art, the fine crushing process usually involves first screening the materials according to size (for example, 2mm), and the larger materials enter the fine crushing equipment for fine crushing, and then repeat the above two steps for the finely crushed materials until all materials meet the size requirements. The above-mentioned fine crushing process is suitable for hard raw materials, but it is difficult to apply to soft raw materials. Compared with hard raw materials, soft raw materials are more hydrophilic, usually have higher water content, are more humid, have higher density, and are easy to adhere to the equipment. Specifically, when screening, soft raw materials are easy to be compacted and adhered to the screening surface of the screening equipment, resulting in poor screening effect; fine crushing equipment is mainly vertical mill, roller mill and other equipment. Such equipment not only has high power and high energy consumption, but also if vertical mill, roller mill and other equipment are used for crushing, soft raw materials are easy to adhere to the roller surface of the equipment, which interferes with the rolling of the material by the roller surface, resulting in poor fine crushing effect and fine crushing efficiency. Therefore, soft raw materials are usually not crushed by vertical mill or roller mill, but only enter the subsequent grinding process after rough size screening or coarse crushing. In summary, the existing fine crushing process can only be applied to hard raw materials, and cannot achieve better fine crushing effect of soft raw materials; and the existing fine crushing equipment has high energy consumption, resulting in high production costs. Summary of the invention

[0003] The purpose of the present invention is to provide a method for finely crushing ceramic raw materials in view of the problem that the finely crushing process in the prior art can only be applied to hard raw materials and cannot achieve a better finely crushing effect for soft raw materials.

[0004] To achieve the above object, the present invention provides a method for finely crushing ceramic raw materials, comprising the following steps:

[0005] a: Use the first screening device to screen out materials with a particle size greater than a preset critical particle size value, and the screened materials are finished products;

[0006] b: Remove iron from the material on the sieve;

[0007] c: Send the iron-removed materials to the fine crushing equipment with a scraper on the roller surface for fine crushing;

[0008] d: Use the dispersing device to disperse the crushed materials and then send them to the material dividing device;

[0009] e: using the material dividing device to send the material into the second screening device, screening out the material with a particle size greater than the preset critical particle size value, and screening out the finished product of the material;

[0010] f: Repeat steps ce for the material on the screen until all the material is finished.

[0011] The present invention adopts the above-mentioned technical scheme. When the fine crushing equipment is used to crush the soft material, the scraper on the roller surface of the fine crushing equipment can scrape off the soft material adhering to the roller surface to prevent it from interfering with the roller surface's crushing of the material, thereby achieving a better fine crushing effect; at the same time, for the soft material after fine crushing, the soft material is broken up and sent to the second screening device for screening, thereby preventing the soft material from sticking together and forming clumps, making it easier to screen and improving the screening efficiency. Compared with the fine crushing process in the prior art that can only be applied to hard raw materials and cannot achieve a better fine crushing effect for soft raw materials, the fine crushing process provided by the present invention is not only applicable to hard ceramic raw materials, but also to soft ceramic raw materials, thereby achieving a better fine crushing effect for soft raw materials and improving the fine crushing efficiency.

[0012] Furthermore, in step e, the number of the second screening devices is two. For soft materials, the material dividing device divides the materials into two parts and sends them into two second screening devices respectively, and screening is performed at the same time, thereby avoiding the phenomenon that too much soft material in a single screening device is compacted and adhered to the screening surface of the screening equipment. The fine crushing effect is better, and the screening efficiency is also improved by setting two screening devices.

[0013] Furthermore, the fine crushing equipment is a single-drive high-pressure roller mill with studs on the roller surface. Compared with the vertical mill and double-roll mill in the prior art, the single-drive high-pressure roller mill has lower installed power and lower power consumption per unit product, thereby reducing energy consumption and saving production costs. The stud-type roller surface has a better fine crushing effect on hard ceramic raw materials.

[0014] Furthermore, in step c, the material of a preset mass is first weighed by a metering device and then fed into the fine crushing equipment, and the quality of the raw materials fed into the fine crushing equipment is accurately controlled to ensure that it matches the fine crushing capacity of the fine crushing equipment.

[0015] Furthermore, the preset critical particle size value is 2 mm.

[0016] Furthermore, the first screening device and the second screening device are both vibrating screens, the equipment is easy to obtain and the screening effect is better.

[0017] Furthermore, the material dividing device is a three-way valve, which can effectively realize the material dividing operation.

[0018] Furthermore, the metering device is a quantitative feeder, which is easy to obtain and has good conveying, weighing and quantitative control functions.

[0019] Furthermore, the dispersing device is a dispersing machine, which is easy to obtain and has a better function of dispersing materials.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the fine crushing process provided by the present invention is applicable not only to hard ceramic raw materials, but also to soft ceramic raw materials, and can achieve better fine crushing effect of soft raw materials and improve fine crushing efficiency; the fine crushing equipment adopts a single-drive high-pressure roller mill, which reduces energy consumption and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The process of this method is shown in Figure 2. Figure 1 ;

[0022] Figure 2 The process of this method is shown in Figure 2. Figure 2 .

[0023] Markings in the figure: 1-first silo, 2-first screening device, 3-iron removal device, 4-second silo, 5-metering device, 6-fine crushing equipment, 7-disintegration device, 8-material dividing device, 9-second screening device, 10-finished product. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] This embodiment provides a method for finely crushing ceramic raw materials, such as Figure 1-2 As shown, the following steps are included:

[0027] a: Use the first screening device 2 to screen out materials with a particle size greater than a preset critical particle size value, and the screened materials are finished products;

[0028] Specifically, the material is first sent to the first silo 1 for storage, and then sent from the first silo 1 to the first screening device 2 for screening; before the material is sent to the first silo 1, the material can be roughly broken to make the material particle size less than 30mm to prevent the discharge port of the first silo 1 from being blocked; the preset critical particle size value is set to 2mm; the first screening device 2 is a vibrating screen;

[0029] b: Remove iron from the material on the sieve;

[0030] Specifically, the iron removal device 3 is used to perform iron removal treatment, which can significantly improve the whiteness quality of the raw materials and is a necessary step in the ceramic raw material processing process;

[0031] c: Send the iron-removed material to the fine crushing device 6 with a scraper on the roller surface for fine crushing;

[0032] Specifically, the material after iron removal is first sent to the second silo 4 for storage, and then the material of preset mass is weighed by the metering device 5, and then sent to the fine crushing equipment 6; the metering device 5 is a quantitative feeder; the fine crushing equipment 6 is a single-drive high-pressure roller mill with studs on the roller surface; the scraper on the roller surface of the single-drive high-pressure roller mill is composed of a fixed frame, a pressure plate, and a scraper plate, and its main function is to fix the scraper plate on the frames of the movable roller and the fixed roller respectively, wherein the scraper plate is a 10mm thick rubber plate or polyethylene plate, and the gap between the scraper plate and the roller surface is 1mm.

[0033] d: The crushed material is broken up by the breaking device 7 and then sent to the material dividing device 8;

[0034] Specifically, the dispersing device 7 is a dispersing machine, which disperses the materials to facilitate the material dispersing device 8 to perform material dispersing; the material dispersing device 8 is a three-way valve;

[0035] e: using the material dividing device 8 to feed the material into the second screening device 9, screening out the material with a particle size greater than the preset critical particle size value, and screening out the finished product of the material;

[0036] Specifically, there are two second screening devices 9, both of which are vibrating screens; when finely crushing hard materials, the material dividing device 8 feeds the materials into one of the second screening devices 9 for screening, and the other is used as a standby; when finely crushing soft materials, the material dividing device 8 divides the materials into two equal parts and feeds them into two second screening devices 9 for screening;

[0037] f: Repeat steps ce for the material on the screen until all the material is finished.

[0038] The present invention adopts the above-mentioned technical scheme. When the fine crushing equipment is used to crush the soft material, the scraper on the roller surface of the fine crushing equipment can scrape off the soft material adhered to the roller surface to avoid it interfering with the roller surface's rolling of the material, thereby achieving a better fine crushing effect; at the same time, for the soft material after fine crushing, the material is broken up and divided into two screening devices for simultaneous screening, thereby avoiding the phenomenon that too much soft material in a single screening device is compacted and adhered to the screening surface of the screening device, and the fine crushing effect is better. At the same time, the screening efficiency is also improved by setting up two screening devices. Compared with the fine crushing process in the prior art that can only be applied to hard raw materials and cannot achieve the problem of better fine crushing effect for soft raw materials, the fine crushing process provided by the present invention is applicable to soft ceramic raw materials in addition to hard ceramic raw materials, can achieve better fine crushing effect for soft raw materials, and improve fine crushing efficiency; at the same time, the fine crushing equipment adopts a single-drive high-pressure roller mill, which reduces energy consumption and saves production costs.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for finely crushing ceramic raw materials, characterized in that: The following steps are involved: a: using the first screening device (2) to screen out materials with a particle size greater than a preset critical particle size value, and screening out the finished products; b: Remove iron from the material on the sieve; c. Sending the iron-removed material to a fine crushing device (6) with a scraper on the roller surface for fine crushing; d. Using the dispersing device (7) to disperse the crushed material, and then feeding it into the material dividing device (8); e: using the material dividing device (8) to feed the material into the second screening device (9), screening out the material with a particle size greater than the preset critical particle size value, and screening out the finished material; the number of the second screening devices (9) is two; when finely crushing hard materials, the material dividing device (8) feeds the material into one of the second screening devices (9) for screening, and the other is used as a standby; when finely crushing soft materials, the material dividing device (8) divides the material into two equal parts and feeds them into two second screening devices (9) for screening; f: Repeat steps ce for the material on the screen until all the material is finished.

2. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: The fine crushing equipment (6) is a single-drive high-pressure roller mill with spikes on the roller surface.

3. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: In step c, a preset mass of material is first weighed by a metering device (5) and then fed into the fine crushing device (6).

4. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: The preset critical particle size value is 2 mm.

5. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: The first screening device (2) and the second screening device (9) are both vibrating screens.

6. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: The material distribution device (8) is a three-way valve.

7. The method for finely crushing ceramic raw materials according to claim 3, characterized in that: The metering device (5) is a quantitative feeder.

8. The method for finely crushing ceramic raw materials according to claim 1, characterized in that: The dispersing device (7) is a dispersing machine.

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