Crushing and grading system for carburant

Abstract

The utility model discloses a carburant crushing and grading system. Comprising a first stock bin, a slag cooler, a bucket elevator, a screening machine and a second stock bin, wherein the slag cooler is used for receiving materials from the first stock bin; the bucket elevator is used for receiving the materials from the slag cooler; the screening machine is used for receiving the materials from the bucket elevator and screening the materials; the first screening bin is used for receiving a finished product material from the screening machine, the secondary crushing and screening system is used for receiving a coarse material from the screening machine, the particle size of the powder material is 0-1 mm, the particle size of the finished product material is 1-5 mm, and the particle size of the coarse material is 5-25 mm. The carburant crushing and grading system disclosed by the utility model can be used for remarkably reducing the generation of powder, improving the particle size uniformity of the carburant and the product quality, and improving the market competitiveness of products.

Description

Technical Field

[0001] The utility model belongs to the technical field of recarburizer production. Specifically, the utility model relates to a recarburizer crushing and grading system. Background Art

[0002] Under the background of current industrial development, as an essential additive in industries such as steel smelting and casting, the quality and particle size distribution of recarburizer have a direct impact on the performance of the final product. In the actual production process, the by-product recarburizer from the graphitization process of anode materials is generally crushed by a ring hammer crusher. It is found that after crushing and screening the recarburizer with a size of 5 - 25mm, the proportion of recarburizer with a size of 1 - 5mm is about 75%, and the proportion of recarburizer with a size of 0 - 1mm is 25%. Among them, the proportion of particles with a size less than 1mm in the 1 - 5mm recarburizer reaches about 24%. Therefore, the total proportion of 0 - 1mm is as high as 43%. The overall particle size quality and economy are not good, and a relatively large amount of powder is generated.

[0003] At the same time, the traditional recarburizer crushing and screening process flow is too complex. That is, if the recarburizer with a size of 5 - 25mm needs to be crushed and screened again, a new crusher, a hoist, a screening machine need to be added, and two bins need to be added to receive the two - stage recarburizer with sizes of 0 - 1mm and 1 - 5mm after crushing respectively.

[0004] Chinese Patent with application number 202210222290.9 discloses a two - way cutter wheel torsion adjustment type recarburizer crushing production machine, including an inclined torsion extrusion type two - way rotation adjustment crushing device, a driving device, a non - sensing adaptive adjustment type large - particle grinding device, and a mixing extrusion molding device. The invention belongs to the field of recarburizer production. Specifically, it refers to a two - way cutter wheel torsion adjustment type recarburizer crushing production machine. The invention adopts the method of adding a limit to the parallelogram in advance to achieve the technical effect of stably adjusting the offset of the cutter wheel and adjusting the crushing degree. Without changing the crushing efficiency, the crushing degree is increased, overcoming the technical prejudice that traditional methods need to increase the crushing time or the number of crushing cutter wheels to increase the crushing degree. And under the condition of no sensing components, it can adaptively grind according to the particle size of the particles to be ground (the larger - sized particles are ground, the greater the compression degree of the elastic component, the greater the elastic force, and the higher the grinding efficiency), meeting the production requirements of the recarburizer.

[0005] It is desired to provide an improved recarburizer crushing and grading system, especially regarding how to significantly reduce the generation of powder, improve the particle size uniformity of the recarburizer and the product quality. Summary of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a recarburizer crushing and grading system, aiming to improve the particle size uniformity of the recarburizer and the product quality.

[0007] To achieve the above object, the technical solution adopted by the present utility model is as follows: a recarburizer crushing and grading system, which includes a first bin, a slag cooler for receiving materials from the first bin, a bucket elevator for receiving materials from the slag cooler, a screening machine for receiving materials from the bucket elevator and screening the materials, a second bin for receiving the powder materials from the screening machine, a first screening bin for receiving the finished materials from the screening machine, and a secondary crushing and screening system for receiving the coarse materials from the screening machine. The particle size of the powder materials is 0 - 1 mm, the particle size of the finished materials is 1 - 5 mm, and the particle size of the coarse materials is 5 - 25 mm.

[0008] The secondary crushing and screening system includes a crusher.

[0009] The crushed mixed materials produced by the secondary crushing and screening system re-enter the bucket elevator and the screening machine for cyclic screening and crushing.

[0010] The crusher is a pair-roll crusher.

[0011] The secondary crushing and screening system further includes a magnetic separator.

[0012] A scraper conveyor is arranged between the first bin and the slag cooler.

[0013] A screw conveyor is arranged between the slag cooler and the bucket elevator.

[0014] The recarburizer crushing and grading system of the present utility model can significantly reduce the generation of powder materials, improve the particle size uniformity and product quality of the recarburizer, and enhance the market competitiveness of the product. Description of the Drawings

[0015] This specification includes the following drawings, and the shown contents are respectively:

[0016] Figure 1 It is a schematic structural diagram of the recarburizer crushing and grading system of the present utility model;

[0017] The markings in the figure are: 1, material suction crane; 2, first bin; 3, scraper conveyor; 4, slag cooler; 5, screw conveyor; 6, bucket elevator; 7, screening machine; 8, second bin; 9, first screening bin; 10, magnetic separator; 11, crusher; 12, second screening bin. Detailed Embodiments

[0018] Next, with reference to the drawings, through the description of the embodiments, the specific embodiments of the present utility model will be further described in detail. The purpose is to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model, and to facilitate its implementation.

[0019] It should be noted that in the following embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution. They are only for the convenience of description.

[0020] As Figure 1 shown, the present utility model provides a carburizer crushing and grading system, which includes a first bin 2, a slag cooler 4 for receiving materials from the first bin 2, a bucket elevator 6 for receiving materials from the slag cooler 4, a screening machine 7 for receiving materials from the bucket elevator 6 and screening the materials, a second bin 8 for receiving the powder materials from the screening machine 7, a first screening bin 9 for receiving the finished product materials from the screening machine 7, and a secondary crushing and screening system for receiving the coarse materials from the screening machine 7. The particle size of the powder materials is 0 - 1 mm, the particle size of the finished product materials is 1 - 5 mm, and the particle size of the coarse materials is 5 - 25 mm.

[0021] Specifically, the carburizer crushing and screening process flow of the prior art is too complex. That is, if the 5 - 25 mm carburizer needs to be crushed and screened again, a new crusher 11, a hoist, and a screening machine 7 need to be added, and two bins need to be added to receive the 0 - 1 mm and 1 - 5 mm secondary carburizers after crushing respectively.

[0022] To solve this problem, in the present utility model, by studying the particle size distribution of the 5 - 25 mm carburizer after being crushed by the ring hammer crusher 11 under different parameter conditions, and analyzing the economic benefits under different parameter conditions. At the same time, in - depth market research and technical analysis are carried out to promote the transformation of the crushing equipment, and the ring hammer crusher 11 can be replaced with a pair - roll crusher 11. The pair - roll crusher 11 has been widely used in industries such as metallurgy, chemical industry, and building materials due to its unique crushing principle and high crushing efficiency. At the same time, by using the original hoist, screening machine 7 and bins, the equipment investment can be reduced and centralized management is facilitated. The present utility model can significantly reduce the generation of powder materials, improve the particle size uniformity and product quality of the carburizer, and improve the market competitiveness of the product.

[0023] As Figure 1 shown, a scraper conveyor 3 is arranged between the first bin 2 and the slag cooler 4, and a screw conveyor 5 is arranged between the slag cooler 4 and the bucket elevator 6. The products from the carburizer production line are stored in the first bin 2. The first bin 2 is a high - temperature bin, and then the carburizer from the first bin 2 is transported to the slag cooler 4 for cooling through the scraper conveyor. The cooled carburizer is sent to the bucket elevator 6 through the screw conveyor 5.

[0024] As Figure 1As shown in the figure, the recarburizer enters the screening machine 7 from the bucket elevator 6 for screening. The particle size of the recarburizer can be divided into 0 - 1mm, 1 - 5mm, and 5 - 25mm. Among them, 0 - 1mm is powder, 1 - 5mm is finished product, and 5 - 25mm is coarse material. The 5 - 25mm coarse material needs further crushing and screening, and can also be directly sent to the second screening bin 12 for sale according to customized requirements. The 0 - 1mm powder is sent to the second bin 8 for storage and external sales, and the 1 - 5mm finished product is sent to the first screening bin 9 for storage and external sales. When it is confirmed that the production particle size is required for secondary crushing and screening, the 5 - 25mm coarse material enters the secondary crushing and screening system for processing.

[0025] As Figure 1 shown, the secondary crushing and screening system includes a crusher 11, and the discharge port of the crusher 11 is connected to the feed port of the bucket elevator 6. Preferably, the crusher 11 is a pair-roll crusher.

[0026] As Figure 1 shown, the secondary crushing and screening system also includes a magnetic separator 10. A magnetic separator 10 is added in the pipeline before entering the crusher 11 to prevent iron products from contaminating the recarburizer product and protect the pair-roll crusher.

[0027] The material crushed by the crusher 11 returns to the screening machine 7 with double-layer screens of 1mm and 5mm through the bucket elevator 6 for screening. It can reduce the equipment cost of secondary crushing and screening and share equipment with the primary screening. At the same time, it can be fully mixed and homogenized with the 0 - 1mm and 1 - 5mm product materials that can be obtained directly through the original direct screening, ensuring stable product quality.

[0028] Furthermore, the parameters of the pair-roll crusher 11 are that the roll spacing is set to 4mm and the pressure is set to 2MPa. On this basis, the yield of the 1 - 5mm finished product is the highest. The concentration of the 1 - 5mm particle size can be increased by 10 - 25%.

[0029] The recarburizer crushing and grading system of the present utility model has the following advantages:

[0030] 1. Improvement of the process flow. The material larger than 5mm after crushing is processed through a set of equipment, reducing the cost investment.

[0031] 2. Adding a magnetic separator before the crusher can effectively prevent iron contamination of the recarburizer and protect the crusher 11, improving the service life.

[0032] 3. Changing the crusher model to a pair-roll form, and determining the optimal working conditions through experiments to maximize the benefits.

[0033] 4. Using a pair-roll crusher does not have the disadvantages of a ring hammer crusher, that is, there is a risk of material blockage at the mesh opening of the internal screen of the ring hammer crusher.

[0034] 5. The 1-5 mm recarburizer obtained by direct screening is a semi-graphitized recarburizer with relatively more impurities such as sulfur and nitrogen, while the 5-25 mm recarburizer obtained by direct screening is a fully graphitized recarburizer with lower impurities such as sulfur and nitrogen. After the 5-25 mm recarburizer is crushed and screened again, the 1-5 mm recarburizer obtained is mixed with the 1-5 mm recarburizer obtained by the original direct screening, and the quality of the obtained 1-5 mm recarburizer is greatly improved.

[0035] 6. Most of the 5-25 mm recarburizer is crushed into 1-5 mm recarburizer, and the price increase is relatively high, with a value increase of about 550-600 yuan per ton.

[0036] 7. By changing the material flow direction of the crushing and screening system, the cyclic screening and crushing of large-particle (>5 mm) recarburizer can be realized, reducing the energy consumption of the system for crushing and screening.

[0037] Example

[0038] 1. Four crushing experiments were carried out on the 5-25 mm recarburizer under different working conditions.

[0039] Experiment 1: The roll gap is 4 mm, the pressure is 4 MPa, and the usage amount is 13.98 kg.

[0040] Experiment 2: The roll gap is 5 mm, the pressure is 2 MPa, and the usage amount is 4.96 kg.

[0041] Experiment 3: The roll gap is 4 mm, the pressure is 2 MPa, and the usage amount is 9.26 kg.

[0042] Experiment 4: The roll gap is 5 mm, the pressure is 2 MPa, and the usage amount is 12.46 kg.

[0043] The particle size distribution after crushing is as shown in Table 1 below:

[0044] Table 1 Data table of crushing test data under four working conditions

[0045]

[0046] It can be seen that the effect of Experiment 3 is the best, the concentration of the 1-5 mm particle size grade is increased, and the economic value is improved.

[0047] 2. The 1-5mm recarburizer obtained by direct screening is a semi-graphitized recarburizer, which contains more impurities such as sulfur and nitrogen, with an average sulfur content of 0.14% and an average nitrogen content of 0.039%; while the 5-25mm recarburizer obtained by direct screening is a fully graphitized recarburizer, which contains less impurities such as sulfur and nitrogen, with an average sulfur content of 0.05% and an average nitrogen content of 0.02%. After the 1-5mm recarburizer obtained by crushing and screening the 5-25mm recarburizer is mixed with the 1-5mm recarburizer obtained by direct screening, the average sulfur content of the obtained 1-5mm recarburizer reaches 0.07% and the average nitrogen content reaches 0.0247%. The quality of the recarburizer is greatly improved, which can meet the requirements of high-quality recarburizer.

[0048] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. Carbon additive crushing and grading system, characterized in that: It includes a first silo, a slag cooler that receives materials from the first silo, a bucket elevator that receives materials from the slag cooler, a screening machine that receives materials from the bucket elevator and screens the materials, a second silo for receiving the powder materials from the screening machine, a first screened material silo for receiving the finished materials from the screening machine, and a secondary crushing and screening system for receiving the coarse materials from the screening machine. The particle size of the powder materials is 0 - 1 mm, the particle size of the finished materials is 1 - 5 mm, and the particle size of the coarse materials is 5 - 25 mm.

2. The carburizer crushing and grading system according to claim 1, wherein: The secondary crushing and screening system includes a crusher.

3. The carburizer crushing and grading system according to claim 1, wherein: The crushed mixed materials produced by the secondary crushing and screening system re-enter the bucket elevator and the screening machine for cyclic screening and crushing.

4. The carburizer crushing and grading system according to claim 2, characterized in that: The crusher is a pair-roll crusher.

5. The carburizer crushing and grading system according to claim 2, wherein: The secondary crushing and screening system further includes a magnetic separator.

6. The carburizer crushing and grading system according to any one of claims 1 to 4, characterized in that: A scraper conveyor is arranged between the first silo and the slag cooler.

7. The carburizer crushing and classification system according to any one of claims 1 to 4, characterized in that: A screw conveyor is arranged between the slag cooler and the bucket elevator.

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