Automatic solid particle grading device and method and application

Abstract

The invention provides an automatic solid particle grading device and method and application, and belongs to the technical field of metallurgy, calcium carbide and construction. Comprising a stock bin body, the stock bin body comprises a plurality of bin chambers which are arranged side by side, feeding ports and discharging ports of the bin chambers are mutually independent, and middle areas of every two adjacent bin chambers are communicated with each other; and the vibrating screen is arranged right above the stock bin main body according to the sequence of sieve plate apertures from small to large. Automatic material flow adjustment is achieved through the partition plates between the small bins and the gravity of the materials, on the premise that graded kiln entering is achieved, automatic blending of the materials in different bins is achieved, the materials can be preferentially blended from the adjacent bins, it is guaranteed that the particle size difference of the materials entering the kiln is still within the controllable range, meanwhile, the number of used mechanical equipment is small, and cost is low. And the structure is simple, the possibility of mechanical faults is low, the investment cost is low, and generalizability is better achieved.

Description

Technical Field

[0001] The invention belongs to the fields of metallurgy, calcium carbide and construction technology, and in particular relates to an automatic solid particle grading device, method and application. Background Art

[0002] As an important flux in the steel industry, quicklime is an indispensable raw material in the production process of steel enterprises. The production process of quicklime (CaO) is a process in which limestone CaCO3 is decomposed into CaO and CO2 under high temperature calcination, which consumes a lot of energy.

[0003] Limestone has a very tight structure, and its decomposition reaction at high temperature conforms to the gas-solid reaction model, which is carried out layer by layer from the outside to the inside. The reaction process can be summarized into three different stages. The first stage is the induction period, which generates the nucleus of the new phase; the second stage is mainly the process of the nucleus growing up, generating more new phases, and the reaction is getting faster and faster in this stage; the last stage is that as the new phase continues to increase, the reaction rate will gradually decrease.

[0004] If the roasting temperature is too low or the roasting time is insufficient during the production process, the decomposition of CaCO3 will be incomplete, which is called raw burning; if the temperature is too high or the roasting time is too long, the active CaO crystals will change from active CaO to inactive CaO, which is called overburning. Both will greatly reduce the product quality and reduce the activity of the product. In order to ensure that the product has a high activity and does not cause raw burning or overburning, the lime kiln must ensure that the raw material particle size is uniform during the production process.

[0005] There are usually several lime kilns in a production workshop. It is a reasonable choice to burn limestone of different particle sizes in different kilns. When the particle size of the raw materials entering the factory cannot be controlled, the raw materials need to be graded. However, the grading gradient in the existing technology is small, the limestone particle size covered is small, and the application range is limited to rotary kilns. When the material fluctuates and the material amount of different lime kilns cannot be balanced, it can only be adjusted manually, which is not only time-consuming and labor-intensive, but also has poor accuracy in adjusting the material particle size manually, which may cause the limestone material in the kiln to be stratified, that is, a layer of small particle size and a layer of large particle size. This in turn aggravates the production fluctuation and reduces product quality.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] In order to solve the technical problems in the prior art that limestone raw materials have small grading gradient, narrow application range and cannot be automated, a solid particle automatic grading device, method and application are provided.

[0008] A first aspect of the present invention provides an automatic solid particle classification device, comprising:

[0009] The silo body comprises a plurality of chambers arranged in parallel, wherein the feed ports and the discharge ports of the plurality of chambers are independent of each other, and the middle areas of two adjacent chambers are interconnected; preferably, the height of the interconnected middle areas accounts for 1 / 4-3 / 4 of the height of the chambers, and more preferably, the height of the interconnected middle areas accounts for 1 / 3-1 / 2 of the height of the chambers.

[0010] The vibrating screen is arranged directly above the silo body in order of the sieve plate apertures from small to large.

[0011] In some embodiments, a partition is provided between the feed ports of adjacent chambers, and the bottom of the partition does not contact the bottom of the silo body.

[0012] In some embodiments, a wire mesh is provided between each of the partitions and the bottom of the silo body. Preferably, the aperture of the wire mesh is consistent with the maximum particle size of the raw material.

[0013] In some embodiments, the number of sieve plate aperture sizes of the vibrating screen is greater than or equal to the number of chambers.

[0014] In some embodiments, the number of sieve plate aperture sizes of the vibrating screen is ≥ 2×the number of chambers.

[0015] In some embodiments, the number of sieve plate aperture sizes of the vibrating screen is ≥ 3×the number of chambers.

[0016] The more grading gradients there are, the better the grading effect will be.

[0017] In some embodiments, a filter screen is arranged before the vibrating screen, and the pore size of the filter screen is smaller than the pore size of the vibrating screen.

[0018] In some embodiments, the filter screen is integrated with or separately from the vibrating screen.

[0019] In some embodiments, the number of the chambers is 3, a vibrating screen is provided directly above each chamber, and the sieve plate aperture of each vibrating screen has 2 particle sizes.

[0020] A second aspect of the present invention provides a classification method based on the above-mentioned solid particle automatic classification device, comprising:

[0021] The raw materials are divided into several particle sizes after passing through the vibrating screen, and the raw materials of each particle size enter the corresponding chamber;

[0022] When the amount of material in one of the bins is insufficient, the raw materials in the adjacent bins are automatically replenished to the bin with insufficient raw materials in the area below the partition under the action of gravity.

[0023] In some embodiments, the raw material enters a filter screen before entering the vibrating screen to filter out raw materials with too small particle sizes.

[0024] The third aspect of the present invention provides an application of the above-mentioned solid particle automatic classification device and the above-mentioned classification method in a horizontal lime kiln or a vertical lime kiln.

[0025] Compared with the prior art, the technical effects achieved by the present invention are as follows:

[0026] (1) The present invention utilizes the partitions between the small bins and the gravity of the materials to realize automatic adjustment of the material flow. On the premise of realizing graded entry into the kiln, it also satisfies the automatic allocation of materials in different bins, and the materials will be allocated preferentially from the adjacent bins, ensuring that the particle size difference of the materials entering the kiln is still within a controllable range. At the same time, the number of mechanical equipment used is small, the structure is simple, the possibility of mechanical failure is low, and the investment cost is low, which makes it more popularizable.

[0027] (2) The present invention can realize automatic adjustment of materials when the fluctuation range of raw materials is not large or when a particle size production line is under maintenance. Materials of adjacent particle sizes are mixed first, so that the particle size fluctuation of materials entering the kiln is a slow-changing process, thereby minimizing the particle size difference to the greatest extent. Regardless of any changes in raw materials or operations, effective classification can still be achieved.

[0028] (3) The solid particle automatic classification device and method provided by the present invention has a wide range of applications, not only applicable to horizontal lime kilns and vertical lime kilns, but also not limited to the lime kiln industry, and can be applied to all horizontal and vertical kilns that use solid particles as raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a solid particle automatic classification device in one embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the working principle of the automatic solid particle classification device in one embodiment of the present invention;

[0031] Figure 3 is a schematic structural diagram of a solid particle automatic classification device in another embodiment of the present invention;

[0032] Figure 4 This is a possible particle size classification gradient in one embodiment of the present invention;

[0033] In the figure: 1. Silo body; 2. Partition; 3. Vibrating screen; 4. Filter screen; 5. Wire mesh. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described below by specific embodiments in conjunction with the accompanying drawings. It should be understood that one or more steps mentioned in the present invention do not exclude the existence of other methods and steps before and after the combination step, or other methods and steps can be inserted between these explicitly mentioned steps. It should also be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. Unless otherwise specified, the numbering of each method step is only for the purpose of identifying each method step, and is not intended to limit the order of arrangement of each method or to define the scope of implementation of the present invention. Changes or adjustments in their relative relationships can also be regarded as the scope of implementation of the present invention without substantial changes in the technical content.

[0035] The sources of the raw materials and instruments used in the examples are not particularly limited and can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0036] like Figure 1 , Figure 2 As shown, an automatic solid particle grading device comprises: a silo body 1, which comprises three chambers arranged in parallel, the feed port and the discharge port of the three chambers (bin No. 1, bin No. 2, and bin No. 3) are independent of each other, and the discharge port is arranged in an inverted cone shape, which is convenient for discharging and entering the kiln; a partition plate 2 is arranged between the feed ports of adjacent chambers; a vibrating screen 3 is arranged directly above the silo body 1 in the order of the sieve plate aperture from small to large, that is, bin No. 1 corresponds to a small-aperture sieve plate, bin No. 2 corresponds to a medium-aperture sieve plate, and bin No. 3 corresponds to a large-aperture sieve plate.

[0037] In one embodiment, the vibrating screen 3 directly above the silo body 1 can be a whole, which covers the entrance of the entire silo body (that is, covers the entrances of silo No. 1, silo No. 2, and silo No. 3), and the aperture of the sieve plate of the vibrating screen 3 gradually increases from left to right.

[0038] In one embodiment, there are three vibrating screens 3 directly above the silo body 1, and the positions of the 3 vibrating screens 3 correspond to the entrances of silo No. 1, silo No. 2, and silo No. 3 respectively. The sieve plate aperture specification of each vibrating screen 3 can be one or more, and the aperture of the vibrating screen 3 gradually increases from left to right.

[0039] In one embodiment, the vibrating screens 3 include two, which are respectively located directly above the partition 2 between bin No. 1 and bin No. 2, and between bin No. 2 and bin No. 3. Each vibrating screen 3 includes two aperture specifications, and the aperture gradually increases from left to right. The sieve plate aperture of the vibrating screen 3 directly above the partition 2 between bin No. 2 and bin No. 3 is larger than the sieve plate aperture of the vibrating screen 3 directly above the partition 2 between bin No. 1 and bin No. 2.

[0040] In one embodiment, a filter screen 4 is provided before the vibrating screen 3 in bin No. 1, and the filter screen 4 is smaller than the vibrating screen 3 above bin No. 1. The raw material enters the filter screen 4 before entering the vibrating screen 3 to filter out particles with too small a particle size. A waste recovery device is provided below the filter screen to recover the small particles filtered out.

[0041] In one embodiment, the filter screen 4 and the vibration screen 3 are integrated or separately arranged.

[0042] In one embodiment, the bottom of the partition 2 does not contact the bottom of the silo body 1, and the two adjacent silos are connected to each other. Due to the blocking of the partition 2 at the top of the grading silo (silo 1, silo 2, silo 3), the materials of each size grade will be strictly restricted in the corresponding small silo (silo 1, silo 2, silo 3) during the material dropping process, and will be piled up to a certain height ( Figure 2 The upper surface of the material layer under normal circumstances is shown in the figure), which remains basically unchanged during the production process. When the raw materials enter the warehouse, the three drop ports at the bottom of the warehouse are opened at the same time, and the materials in the warehouse move down evenly. When the materials fall from the upper part of the warehouse to the middle part of the warehouse, since the middle part of the warehouse is full of materials at this time, the materials between warehouse No. 1 and warehouse No. 2 and the materials between warehouse No. 2 and warehouse No. 3 are restricted by each other, and there will be no large amount of cross-material. When the materials in the three warehouses are unbalanced, the adjacent warehouses will automatically replenish the materials to the warehouse lacking materials through the interconnected middle area, that is, when the materials in warehouse No. 1 are insufficient, the materials on the left side of warehouse No. 2 (near the side of warehouse No. 1) will automatically replenish the materials in warehouse No. 1, and the materials on the left side of warehouse No. 3 (near the side of warehouse No. 2) will automatically replenish the materials in warehouse No. 2; on the contrary, when the materials in warehouse No. 3 are insufficient, the materials on the right side of warehouse No. 2 (near the side of warehouse No. 3) will automatically replenish the materials in warehouse No. 3, and the materials on the right side of warehouse No. 1 (near the side of warehouse No. 2) will automatically replenish the materials in warehouse No. 2. When there is insufficient material in warehouse No. 2, the materials on the left side of warehouse No. 3 (close to warehouse No. 2) and the right side of warehouse No. 1 (close to warehouse No. 2) will automatically replenish the materials in warehouse No. 2. Conversely, when there is insufficient material in warehouse No. 3 and warehouse No. 1, the materials on the side of warehouse No. 2 close to warehouse No. 3 will automatically replenish the materials in warehouse No. 3, and the materials on the side of warehouse No. 2 close to warehouse No. 1 will automatically replenish the materials in warehouse No. 1.

[0043] In one embodiment, the classification method of the above-mentioned solid particle automatic classification device includes (taking limestone as an example):

[0044] The limestone raw material is transported to the device through a conveyor belt, and the limestone raw material first falls into the filter screen 4, and the limestone particles with too small aperture that do not meet the requirements are screened out by the filter screen 4;

[0045] The filtered limestone raw material enters the vibrating screen 3. After passing through the vibrating screen 3, the limestone raw material is divided into several particle size grades and falls into corresponding chambers. Each chamber corresponds to a lime kiln.

[0046] During normal production, the amount of material in each particle size grade matches the production volume of the corresponding lime kiln. When the raw material particle size fluctuates or production maintenance occurs, the insufficient raw material particle size grade will automatically borrow material from the two adjacent bins along the middle area connected below the partition 2. That is, when the material in bin No. 1 is insufficient, the material on the left side of bin No. 2 (close to the side of bin No. 1) will automatically replenish the material in bin No. 1, and the material on the left side of bin No. 3 (close to the side of bin No. 2) will automatically replenish the material in bin No. 2; conversely, when the material in bin No. 3 is insufficient, the material on the right side of bin No. 2 (close to the side of bin No. 3) will automatically replenish the material in bin No. 3, and the material on the right side of bin No. 1 (close to the side of bin No. 2) will automatically replenish the material in bin No. 2. When there is insufficient material in warehouse No. 2, the materials on the left side of warehouse No. 3 (close to warehouse No. 2) and the right side of warehouse No. 1 (close to warehouse No. 2) will automatically replenish the materials in warehouse No. 2. Conversely, when there is insufficient material in warehouse No. 3 and warehouse No. 1, the materials on the side of warehouse No. 2 close to warehouse No. 3 will automatically replenish the materials in warehouse No. 3, and the materials on the side of warehouse No. 2 close to warehouse No. 1 will automatically replenish the materials in warehouse No. 1.

[0047] Materials of adjacent particle sizes are mixed first, and the particle size fluctuation of materials in the kiln is a gradual and slow changing process, which minimizes the particle size difference and maintains the uniformity of roasting to avoid large-scale raw burning or over-burning.

[0048] Taking three double-chamber lime kiln workshops with the same output as an example, the aperture of the first vibrating screen (filter screen 4) is set to 20mm; the first half of the aperture of the second vibrating screen is set to 35mm, and the second half is set to 50mm; the first half of the aperture of the third vibrating screen is set to 60mm, and the second half is set to 70mm; the first half of the aperture of the fourth vibrating screen is set to 85mm, and the second half is set to 100mm. The first vibrating screen (filter screen 4) is set before entering the silo body 1, the second vibrating screen is set directly above the No. 1 silo, the third vibrating screen is set directly above the No. 2 silo, and the fourth vibrating screen is set directly above the No. 3 silo.

[0049] 20,000 tons of raw materials were purchased, and the particle size distribution range is 10-100 mm, of which 200 tons are below 20 mm, 6,500 tons are 20-50 mm, 6,500 tons are 50-70 mm, 6,500 tons are 70-100 mm, and 300 tons are above 100 mm (usually less than 30 mm and more than 80 mm are not more than 15% are considered qualified materials). The materials are classified into five gradients by the designed sieve plate aperture:

[0050] ① Below 20mm, most of the materials below 20mm fall into the waste recycling device;

[0051] ②20~50mm, most of the materials with 20~35mm fall into the left side of bin 1 (a), and most of the materials with 35~50mm fall into the right side of bin 1 due to the restriction of the partition between bin 1 and bin 2 (b);

[0052] ③50~70mm, most of the materials with 50~60mm are restricted by the partition between bin 1 and bin 2 and fall into the left side of bin 2 (c), and most of the materials with 60~70mm are restricted by the partition between bin 2 and bin 3 and fall into the right side of bin 2 (d);

[0053] ④70~100mm, most of the materials with a size of 70~85mm are restricted by the partition between bins 2 and 3 and fall into the left side of bin 3 (e), and most of the materials with a size of 85~100mm fall into the right side of bin 3 (f);

[0054] ⑤ And materials larger than 100mm.

[0055] Those below 20mm and above 100mm are transported away as waste.

[0056] Due to the blockage of the partition 2 on the upper part of the grading bin, the materials of each size grade will be strictly restricted in the corresponding small bin during the falling process and piled up to a certain height ( Figure 2 The material layer is shown on the upper surface of the material layer under normal circumstances in the figure), which remains basically unchanged during the production process. When the raw materials enter the warehouse, the three drop ports at the bottom of the warehouse are opened at the same time, and the materials in the warehouse move down evenly. When the materials fall from the upper part of the warehouse to the middle part of the warehouse, since the middle part of the warehouse is full of materials at this time, the materials between warehouses 1 and 2 and between warehouses 2 and 3 are restricted by each other, and there will be no large amount of material contamination. The materials continue to move down to the bottom of the warehouse and are separated by the inverted cone discharge port. Finally, the 20-50mm raw materials are input into kiln 1 as materials with particle size gradient 1, the 50-70mm raw materials are input into kiln 2 as materials with particle size gradient 2, and the 70-100mm raw materials are input into kiln 3 as materials with particle size gradient 3.

[0057] In another embodiment, 20,000 tons of materials are purchased, and the particle size distribution range is 10-100 mm, including 200t of materials below 20 mm, 6000t of materials from 20 to 50 mm, 7000t of materials from 50 to 70 mm, 6500t of materials from 70 to 100 mm, and 300t of materials above 100 mm. The materials are still classified into five gradients according to the designed vibration screen plate aperture, and the basic form is basically the same as the above embodiment.

[0058] During the process of raw materials entering the warehouse, the three material discharge ports at the bottom of the warehouse are still opened at the same time. The difference is that at this time, due to the fluctuation of the material gradient content, less material enters warehouse No. 1, and more material enters warehouse No. 2. The material line at the top of warehouse No. 1 will gradually drop. When the material line drops below the partition 2 in the middle of the warehouse, the material in the middle of warehouse No. 2 is no longer restricted by the material in warehouse No. 1. The material in warehouse No. 2 close to warehouse No. 1 (that is, the material with a particle size close to the 50-60mm particle size of warehouse No. 1) will automatically slide into warehouse No. 1 to replenish the material in warehouse No. 1. During the whole process, warehouse No. 2 replenishes 500t of material with a particle size of basically 50-60mm to warehouse No. 1. Under the condition of ensuring the normal operation of the No. 1 lime kiln corresponding to warehouse No. 1, the particle size fluctuation of warehouse No. 1 is within a controllable range, and the effect of graded kiln entry can still be achieved.

[0059] Similarly, when the medium-sized materials are insufficient, Bin 1 will give priority to replenishing the 35-50mm materials on the right side of Bin 2, and Bin 3 will give priority to replenishing the 70-85mm materials on the left side of Bin 2. When Bin 3 is insufficient, Bin 2 will give priority to replenishing the 50-70mm materials on the right side of Bin 3.

[0060] The advantage of having two particle sizes in each bin is that, under the premise of achieving graded material entry into the kiln, it can also meet the automatic allocation of materials. In case of occasional material fluctuations or maintenance of a certain particle size production line, materials will only be allocated from materials of adjacent particle sizes in adjacent bins, ensuring that the particle size difference of materials entering the kiln is still within a controllable range.

[0061] Figure 3 The schematic diagram of the device structure shown is another embodiment of the present invention, and its main structure, working principle and Figure 1 The embodiment shown is the same as that shown in the figure, except that a steel mesh 5 is provided between each partition 2 and the bottom of the silo body, and the aperture of the steel mesh is consistent with the maximum particle size of the raw material (in the embodiment of the above three double-chamber lime kiln workshops with the same output, the steel mesh 5 is used). Figure 3 When the device is in the mode, the wire mesh particle size is preferably 100mm), and the wire mesh 5 separates the middle area of ​​the adjacent chambers, but still maintains the state of communication. The purpose of this setting is to not affect the mutual borrowing of materials between the two adjacent chambers when the materials are unbalanced, but also to prevent the collapse of materials between the two adjacent chambers, and then the phenomenon of disorderly borrowing materials, and further ensure the orderliness of the borrowing process.

[0062] The present invention utilizes the partitions between the small bins and the gravity of the materials to realize automatic adjustment of the material flow, uses fewer mechanical equipment, has a lower possibility of mechanical failure, has a low investment cost, and is more popularizable.

[0063] Figure 1 , Figure 3The design drawings of the grading bins for three kilns, as well as the material loading conditions when materials of different particle sizes are added to other materials of other particle sizes. When the grading gradient increases, corresponding small bins will be added.

[0064] like Figure 4 As shown, the present invention is not limited to the number of lime kilns and graded gradients, which can be determined according to the number of lime kilns of the production enterprise, with a minimum of 2. The smaller the particle size difference between the raw materials in the same kiln, the smaller the fluctuation of production, so the more graded gradients there are, the better the effect of the graded gradients.

[0065] The actual production process is complex and changeable. The material line is not only restricted by the purchasing reasons in the above example, but also affected by many factors such as production line maintenance, equipment operation, different operating levels, etc. If only the material is graded but cannot be adjusted automatically, the production operation needs to frequently adjust the amount of material entering each kiln after screening, which will make the production operation extremely troublesome; in addition, if the material of one level is simply transferred to another material level without distinction, the grading effect cannot be achieved, and even the air permeability of the material column in the kiln will be different at different times, which greatly increases the difficulty of production control.

[0066] The present invention can realize automatic material adjustment when the raw material fluctuation range is not large or the production and maintenance is not long. The materials of adjacent particle sizes are mixed first. The particle size fluctuation of the materials in the kiln is a slow change process, which minimizes the particle size difference. No matter what changes are made in the raw materials or the operation, effective classification can still be achieved.

[0067] The solid particle automatic classification device and method provided by the present invention are suitable for horizontal lime kilns and vertical lime kilns, but are not limited to the lime kiln industry. They can be applied to all horizontal and vertical kilns using solid particles as raw materials, including but not limited to blast furnaces and coke ovens.

[0068] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A solid particle automatic classification device, characterized in that: include: The silo body comprises a plurality of silo chambers arranged in parallel, wherein the feed inlets and the discharge inlets of the plurality of silo chambers are independent of each other, and the middle areas of two adjacent silo chambers are connected to each other; The vibrating screen is arranged directly above the silo body in order of the sieve plate apertures from small to large.

2. The solid particle automatic classification device according to claim 1, characterized in that: A partition is provided between the feed inlets of adjacent chambers, and the bottom of the partition does not contact the bottom of the silo body.

3. The solid particle automatic classification device according to claim 1, characterized in that: A steel wire mesh is provided between each partition and the bottom of the silo body. Preferably, the aperture of the steel wire mesh is consistent with the maximum particle size of the raw material.

4. The solid particle automatic classification device according to claim 1, characterized in that: The number of sieve plate apertures of the vibrating screen is ≥ the number of chambers; Alternatively, the number of sieve plate aperture sizes of the vibrating screen is ≥ 2×the number of chambers.

5. The solid particle automatic classification device according to claim 1, characterized in that: A filter screen is arranged before the vibrating screen, and the aperture of the filter screen is smaller than that of the vibrating screen.

6. The solid particle automatic classification device according to claim 5, characterized in that: The filter screen and the vibrating screen are arranged integrally or separately.

7. The solid particle automatic classification device according to claim 1, characterized in that: The number of the chambers is 3, and a vibrating screen is arranged directly above each chamber, and the aperture of the sieve plate of each vibrating screen has 2 particle sizes.

8. A classification method based on the solid particle automatic classification device according to any one of claims 1 to 7, characterized in that: include: The raw materials are divided into several particle sizes after passing through the vibrating screen, and the raw materials of each particle size enter the corresponding chamber; When the amount of material in one of the bins is insufficient, the raw materials in the adjacent bins are automatically replenished to the bin with insufficient raw materials in the area below the partition under the action of gravity.

9. The classification method according to claim 8, characterized in that: The raw materials enter the filter screen before entering the vibrating screen to filter out the raw materials with too small particle size.

10. Use of the automatic solid particle classification device according to any one of claims 1 to 7 or the classification method according to claim 8 or 9 in a horizontal lime kiln or a vertical lime kiln.

Images