Material processing device

Abstract

The utility model provides a material processing device which comprises a first-stage grinding device, a second-stage grinding device, a first-stage grinding device and a second-stage grinding device, the first-stage sorting device is used for performing first-stage sorting on the first material to obtain a second material and a third material, and conveying the second material to the first-stage grinding device; the material dividing device is used for dividing the third material into a fourth material and a fifth material, and the fourth material is taken as a product to be sent out; the second-stage sorting device is used for carrying out second-stage sorting on the fifth material to obtain a sixth material and a seventh material, and conveying the sixth material to the first-stage grinding device; and the second-stage grinding device is used for performing second-stage grinding on the seventh material to obtain an eighth material and conveying the eighth material to the first-stage grinding device. According to material processing and manufacturing, cross-level tight filling of particles can be simply and efficiently achieved, and therefore the stacking efficiency of the materials is improved.

Description

Technical Field

[0001] The utility model belongs to the field of material processing and relates to a material processing device. Background Art

[0002] The stacking efficiency of materials refers to the compactness of particle stacking, which is generally characterized by the volume concentration occupied by solid materials in the stacking space; the void ratio refers to the volume concentration occupied by the voids in the stacked particles; the particle pore ratio refers to the ratio of the particle diameter to the void diameter when the particles are stacked. At present, there are four main particle stacking theories, namely, the single particle size particle stacking theory, the stacking theory of particles with multiple discrete particle sizes, the stacking theory of continuously distributed particles, and the interlayer stacking theory.

[0003] Among them, the accumulation of particles of a single particle size is the accumulation of equal-diameter spheres, which is an idealized accumulation that can form different accumulation forms. The larger the sphericity coefficient, the more irregular the shape, and the higher the accumulation efficiency. When multiple discrete particle sizes are mixed and accumulated, when the particle size of the small particle is smaller than the pores between the large particles, the small particles may fill in the pores formed by the accumulation of large particles, which is beneficial to improve the accumulation efficiency of the particles. However, small particles may also be sandwiched between large particles, expanding the gaps between the originally tightly packed large particles, increasing the pores between the particles, and thus reducing the accumulation efficiency of the particles. Existing research results show that in order for small particles to be completely filled in the pores of large particles, the required particle-pore ratio should be ≥5, but in practice, for discrete particle accumulation, not all particles will reach such a particle-pore ratio.

[0004] In reality, most materials are piled up with continuously distributed particles. The most commonly used models are Rosin-Rammler, Gaudin-Schuhmann, and Alfred particle size distribution models. However, this type of pile cannot achieve close packing of particles, so the pile efficiency is low. Utility Model Content

[0005] In view of this, the utility model provides a material processing device, which can simply and efficiently achieve cross-level tight filling of particles, thereby improving the stacking efficiency of materials.

[0006] To achieve the above object, according to a first aspect of the present invention, a material processing device is provided, comprising:

[0007] A primary grinding device, used for performing primary grinding on the raw material to obtain a first material;

[0008] A primary sorting device, wherein the inlet of the primary sorting device is connected to the outlet of the primary grinding device to receive the first material from the primary grinding device, the primary sorting device performs primary sorting on the first material to obtain a second material and a third material, and an outlet of the primary sorting device is connected to the inlet of the primary grinding device to transport the second material to the primary grinding device for further primary grinding;

[0009] A buffer device, the buffer device is used to temporarily store the third material, wherein the inlet of the buffer device is connected to another outlet of the primary sorting device;

[0010] A material dividing device, the inlet of which is connected to the outlet of the buffer device to receive the third material from the primary sorting device, the material dividing device divides the third material into a fourth material and a fifth material, and the fourth material is sent out of the boundary as a product through an outlet of the material dividing device;

[0011] a secondary sorting device, wherein the inlet of the secondary sorting device is connected to another outlet of the material dividing device to receive the fifth material from the material dividing device, the secondary sorting device performs secondary sorting on the fifth material to obtain a sixth material and a seventh material, and one outlet of the secondary sorting device is connected to the inlet of the primary grinding device to transport the sixth material to the primary grinding device for primary grinding again; and

[0012] A secondary grinding device, wherein the inlet of the secondary grinding device is connected to another outlet of the secondary sorting device to receive the seventh material from the secondary sorting device, the secondary grinding device performs secondary grinding on the seventh material to obtain an eighth material, and the outlet of the secondary grinding device is connected to the inlet of the primary grinding device to convey the eighth material to the primary grinding device.

[0013] According to any one of the above and the following material processing device,

[0014] The average particle size of the first material is 50-200μm (preferably 80-160μm), and / or the particle size of the second material is greater than 2mm (preferably greater than 2.5mm), and / or the average particle size of the third material is 50-150μm (preferably 80-120μm), and / or the particle size of the sixth material is greater than 0.4mm, preferably greater than 0.6mm, and / or the average particle size of the seventh material is 30-100μm (preferably 50-80μm), and / or the average particle size of the eighth material is 5-30μm (preferably 8-12μm).

[0015] According to any one of the above and the following material processing device,

[0016] The average particle size of the third material is more than 5 times (preferably more than 10 times) the average particle size of the eighth material.

[0017] According to any one of the above and the following material processing device,

[0018] The fourth material accounts for 50-98wt% (preferably 70-95wt%) of the third material, and / or the fifth material accounts for 2-50wt% (preferably 5-30wt%) of the third material.

[0019] According to any one of the above and the following material processing device,

[0020] The primary sorting device and the secondary sorting device are each at least one selected from a centrifuge, a grading screen, a cyclone, a spiral classifier and a concentrator, and / or,

[0021] The primary grinding device and the secondary grinding device are each at least one selected from a horizontal grinding machine and a vertical grinding machine.

[0022] One embodiment of the above utility model has the following advantages or beneficial effects: the material processing device of the utility model can simply and efficiently realize the cross-level tight filling of particles, thereby improving the stacking efficiency of the material.

[0023] The further effects of the above-mentioned non-conventional optional manner will be described below in conjunction with the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 It is a flow chart of material processing of raw materials by the material processing device according to comparative example 1 of the utility model.

[0026] Figure 2 It is a flow chart of material processing of raw materials by the material processing device according to Example 1 of the utility model.

[0027] Figure 3 Particle size distribution diagram of the material obtained according to Comparative Example 1 of the present invention.

[0028] Figure 4 It is a particle size distribution diagram of the material obtained according to Example 1 of the utility model. DETAILED DESCRIPTION

[0029] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description. Unless otherwise specified, the percentages mentioned in this specification are all mass percentages.

[0030] like Figure 1 As shown, the material processing device 1 of the present invention comprises a primary grinding device 101, a primary sorting device 102, a material dividing device 103, a secondary sorting device 201 and a secondary grinding device 202. In addition, the material processing device 1 may further comprise a buffer device 104 and a storage device 105.

[0031] The raw material 2 enters the primary grinding device 101 from the inlet of the primary grinding device 101, and the first material 10 is obtained after primary grinding. The first material 10 is transported to the primary sorting device 102 through the outlet of the primary grinding device 101. The raw material 2 includes pulping raw material, pulping water and dispersant. The pulping raw material is at least one selected from coal, petroleum coke and coke. There is no particular restriction on the average particle size and other parameters of the pulping raw material, but in some embodiments of the utility model, preferably, the proportion of particles with a particle size of 10 mm or more in the pulping raw material is less than 5wt%. The dispersant can be a nonionic surfactant or a cationic surfactant. The nonionic surfactant can be at least one of a polyoxyethylene nonionic surfactant and a polyoxyethylene nonionic surfactant. The cationic surfactant can be at least one of a naphthalene cationic surfactant, a lignin cationic surfactant, a humic acid cationic surfactant, a polycarboxylic acid cationic surfactant, and an aminosulfonate cationic surfactant.

[0032] The primary grinding device 101 can be at least one of a horizontal grinding machine and a vertical grinding machine. The average particle size of the first material 10 obtained after the primary grinding is 50-200 μm, preferably 80-160 μm.

[0033] The first material 10 from the outlet of the primary grinding device 101 enters the primary sorting device 102, and is sorted in the primary sorting device 102 to obtain the second material 20 and the third material 30. The primary grinding device 102 can be at least one selected from a centrifuge, a grading screen, a cyclone, and a spiral classifier. The particle size of the second material 20 is greater than 2 mm, preferably greater than 2.5 mm. On the other hand, the average particle size of the third material 30 is 50-150 μm, preferably 80-120 μm.

[0034] An outlet of the primary sorting device 102 is connected to the inlet of the primary grinding device 101, so as to convey (reflux) the second logistics 20 to the primary grinding device 101 for further primary grinding.

[0035] Another outlet of the primary sorting device 102 is connected to the inlet of the material dividing device 103. The material dividing device can separate (divide) the third material 30 into a fourth material 40 and a fifth material 50 by means of pipelines, material dividing valves, etc.

[0036] The amount of the fourth material 40 is 50-98 wt %, preferably 70-95 wt % of the third material. On the other hand, the amount of the fifth material 50 is 2-50 wt %, preferably 5-30 wt % of the third material.

[0037] Preferably, the logistics processing device 1 of the present invention may further include a buffer device 104. The buffer device 104 may be arranged between the primary sorting device 102 and the material separation device 103. That is, the third material 30 is first transported to the buffer device 104, and then transported to the material separation device 103 from the buffer device.

[0038] The fourth material 40 is sent out of the boundary as a product. Preferably, in the logistics processing and manufacturing 1 of the utility model, a storage device 105 can also be included, which is used to buffer and store the fourth material 40 and then send the fourth material out of the boundary from the storage device.

[0039] The fifth material 50 is transported to the secondary sorting device 201 through another outlet of the material sorting device 103 and is secondarily sorted in the secondary sorting device 201 to obtain the sixth material 60 and the seventh material 70. The sixth material 60 is transported (returned) to the primary grinding device 101 through one outlet of the secondary sorting device 201 for primary grinding again. The seventh material 70 is transported to the secondary grinding device 202 through another outlet of the secondary sorting device 201.

[0040] The particle size of the sixth material 60 is greater than 0.4 mm, preferably greater than 0.6 mm. The average particle size of the seventh material 70 is 30-100 μm (preferably 50-80 μm).

[0041] In the secondary grinding device 202, the seventh material 70 is subjected to secondary grinding to obtain the eighth material 80. The eighth material 80 is an ultrafine particle material with an average particle size of 5-30 μm (preferably 8-12 μm). The eighth material 80 is transported (returned) to the primary grinding device 101 through the outlet of the secondary grinding device 202 to fill the pores of the coarse particle material of the primary grinding device.

[0042] Preferably, the ratio of the average particle size of the seventh material 70 to the average particle size of the eighth material 80 is 3-10, preferably 5-8. When the ratio of the average particle size of the seventh material 70 to the average particle size of the eighth material 80 is within the above range, the energy consumption per ton of material of the secondary grinding device can be reduced to 12-16 kWh.

[0043] Example

[0044] The raw material gasification device of the present invention is further described below through specific embodiments, but the present invention is not limited to the specific embodiments.

[0045] The pulping raw material used in the embodiments and comparative examples of the present application was taken from coal in Yulin, Shaanxi Province, with a total water content of 12.80%, an analytical water content of 3.84%, an air-dried basis ash content of 12.44%, an air-dried basis volatile content of 33.32%, an air-dried basis fixed carbon content of 56.88%, a grindability index of 58, and a received basis lower calorific value of 24.03 MJ / kg; the dispersant selected was naphthalenesulfonate formaldehyde condensate, and the particle size of the imported pulping raw material ≥10 mm in the primary grinding device accounted for ≤5%.

[0046] Comparative Example 1

[0047] Comparative Example 1 is mainly composed of a primary grinding device 101, a primary sorting device 102 and a storage device 105.

[0048] The process of Comparative Example 1 is described as follows: the selected pulping raw materials, dispersants and pulping water are mixed and then enter the primary grinding device 101, the ground first material 10 (average particle size of 150 μm) enters the primary sorting device 102, and after sorting, the second material 20 with a particle size of more than 3.0 mm and the third material 30 with an average particle size of 110 μm are obtained, wherein the second material 20 is returned to the primary grinding device 101 for primary grinding again, and the third material 30 enters the storage device 105, and the material in the storage device 105 is the product. It has been measured that the particle pore ratio of the product is about 3, and the stacking efficiency is 42.86%.

[0049] Example 1

[0050] like Figure 2 As shown, the logistics processing and manufacturing of the utility model is composed of a primary grinding device 101, a primary sorting device 102, a primary buffer device 104, a material dividing device 103, a storage device 105, a secondary sorting device 201, and a secondary grinding device 202.

[0051] The process of Example 1 is described as follows: the selected pulping raw materials, dispersants and pulping water are mixed and then enter the primary grinding device 101. The first material 10 with an average particle size of 120 μm obtained after grinding enters the primary sorting device 102. After sorting, the second material 20 with a particle size of more than 2.5 mm and the third material 30 with an average particle size of 95 μm are obtained, wherein the second material 20 returns to the primary grinding device 101 for primary grinding again, and the third material 30 enters the buffer device 104. The material in the buffer device 104 is divided into the fourth material 40 and the fifth material 50 by the dividing device 103. The fourth material 40 enters the storage device 105 and is then sent out of the boundary as a qualified product. The fifth material 50 is transported to the secondary sorting device 201, and after sorting, the sixth material 60 with a particle size of more than 0.4 mm and the seventh material 70 with an average particle size of 75 μm are obtained. The sixth material 60 is returned to the primary grinding device 101 for re-grinding, while the seventh material 70 enters the secondary grinding device 202 for secondary grinding. The ultrafine particle material (eighth material 80, with an average particle size of 10 μm) ground by the secondary grinding device 202 is returned to the primary grinding device 101, and the ultrafine particle material is filled into the pores of the coarse particle material of the primary grinding device, and the material in the final storage device 105 is the product. It has been measured that the particle pore ratio of the product is about 13, and the stacking efficiency is 47.14%.

[0052] like Figure 3 As shown, in Comparative Example 1, since only one-stage grinding and one-stage sorting device are used, the particle size distribution presents a normal distribution with a slow rise and a steep fall, which is a continuous single-peak particle size distribution. This type of stacking cannot achieve a close stacking of particles, so the stacking efficiency is low. Figure 4 As shown, in Example 1, since secondary grinding, secondary sorting and other devices are added on the basis of Comparative Example 1, part of the ultrafine particle material obtained after treatment is returned to the primary grinding device, so that the pore ratio of the average particle size of the coarse particle material and the average particle size of the ultrafine particle material in the material is greater than 5 (the pore ratio of Example 1 is 13), cross-level tight filling of particles is achieved, thereby significantly improving the stacking efficiency of the material.

[0053] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A material processing device, characterized in that: include: A primary grinding device, used for performing primary grinding on the raw material to obtain a first material; A primary sorting device, wherein the inlet of the primary sorting device is connected to the outlet of the primary grinding device to receive the first material from the primary grinding device, the primary sorting device performs primary sorting on the first material to obtain a second material and a third material, and an outlet of the primary sorting device is connected to the inlet of the primary grinding device to transport the second material to the primary grinding device for further primary grinding; A buffer device, the buffer device is used to temporarily store the third material, wherein the inlet of the buffer device is connected to another outlet of the primary sorting device; A material dividing device, the inlet of which is connected to the outlet of the buffer device to receive the third material from the primary sorting device, the material dividing device divides the third material into a fourth material and a fifth material, and the fourth material is sent out of the boundary as a product through an outlet of the material dividing device; a secondary sorting device, wherein the inlet of the secondary sorting device is connected to another outlet of the material dividing device to receive the fifth material from the material dividing device, the secondary sorting device performs secondary sorting on the fifth material to obtain a sixth material and a seventh material, and one outlet of the secondary sorting device is connected to the inlet of the primary grinding device to transport the sixth material to the primary grinding device for primary grinding again; and A secondary grinding device, wherein the inlet of the secondary grinding device is connected to another outlet of the secondary sorting device to receive the seventh material from the secondary sorting device, the secondary grinding device performs secondary grinding on the seventh material to obtain an eighth material, and the outlet of the secondary grinding device is connected to the inlet of the primary grinding device to convey the eighth material to the primary grinding device.

2. The material processing device according to claim 1, characterized in that: The average particle size of the first material is 50-200 μm, and / or the particle size of the second material is greater than 2 mm, and / or the average particle size of the third material is 50-150 μm, and / or the particle size of the sixth material is greater than 0.4 mm, and / or the average particle size of the seventh material is 30-100 μm, and / or the average particle size of the eighth material is 5-30 μm.

3. The material processing device according to claim 1, characterized in that: The average particle size of the first material is 80-160 μm, and / or the particle size of the second material is greater than 2.5 mm, and / or the average particle size of the third material is 80-120 μm, and / or the particle size of the sixth material is greater than 0.6 mm, and / or the average particle size of the seventh material is 50-80 μm, and / or the average particle size of the eighth material is 8-12 μm.

4. The material processing device according to any one of claims 1 to 3, characterized in that: The average particle size of the third material is more than 5 times the average particle size of the eighth material.

5. The material processing device according to any one of claims 1 to 3, characterized in that: The average particle size of the third material is more than 10 times the average particle size of the eighth material.

6. The material processing device according to any one of claims 1 to 3, characterized in that: The fourth material accounts for 50-98 wt % of the third material, and / or the fifth material accounts for 2-50 wt % of the third material.

7. The material processing device according to any one of claims 1 to 3, characterized in that: The fourth material accounts for 70-95 wt % of the third material, and / or the fifth material accounts for 5-30 wt % of the third material.

8. The material processing device according to any one of claims 1 to 3, characterized in that: The primary sorting device and the secondary sorting device are each at least one selected from a centrifuge, a grading screen, a cyclone, a spiral classifier and a concentrator, and / or, The primary grinding device and the secondary grinding device are each at least one selected from a horizontal grinding machine and a vertical grinding machine.

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