A method for taking out material from a large silo

Abstract

The present application relates to a kind of large silo material taking out use method, belong to large silo material taking out use technical field.The present application includes S1, the time of determining quality abnormal batch, the weight of determining quality abnormal batch before entering the lower part of silo coking coal and the total weight of coking coal in silo;S2, calculate the theoretical time of quality abnormal batch out of silo;S3, to the sampling of material under bin is detected;S4, judge the characteristics of quality abnormal batch material;S5-S8, install separation device and take out material;S9, to the material of taking out is screened;S10, to the material after screening is sampled and detected;S11, formulate coking coal screening sample use scheme.The present application realizes the taking out, screening and use when coking coal in silo enters quality abnormal batch material, can effectively avoid coke quality fluctuation.The method can also be used for coking coal in silo to take out coking coal in silo when spontaneous combustion occurs.

Description

Technical Field

[0001] This invention belongs to the technical field of material removal and utilization from large silos, and relates to a method for material removal and utilization from large silos. Background Technology

[0002] Large silos are increasingly used by coking plants to store coking coal due to their advantages of small footprint, large storage capacity, and low environmental pollution. After entering the silos, the coking coal is directly blended and transported by conveyor belt to the coal tower for coking in the coke oven. However, when the quality of the coking coal in the silo is abnormal or other materials enter the silo, it can only be used for blending and cannot be directly removed. This can easily lead to fluctuations in coke quality, and some materials (such as ore) may even be unsuitable for use in the coke oven, thus damaging it.

[0003] When the quality of coking coal in the silo is abnormal or other types of coking coal are introduced, a small-scale blending method is generally used. However, when coking coal in the silo is introduced into flux, ore, or other substances that are detrimental to the stability of coke quality or even render the coke oven unusable, the material in the silo cannot be directly removed, which is detrimental to the company's production. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method for removing and using materials from large silos, which solves the problem of materials stored in silos being unable to be removed; at the same time, production can be quickly resumed after the coking coal in the silo is removed, the whole process is low-cost, quick to take effect, and has good results.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for removing and using materials from a large silo includes the following steps:

[0007] S1. Determine the time of the batch of coking coal with abnormal quality in the silo, and based on this time, determine the weight of coking coal in the lower part of the silo before the batch with abnormal quality entered the silo, and determine the total weight of coking coal in the silo.

[0008] S2. Based on the inventory at the bottom of the silo before the defective batch enters the silo and the normal daily usage of the silo, calculate the theoretical time for the defective batch to leave the silo.

[0009] S3. According to the set quality inspection frequency, take samples of the materials in the warehouse for testing and determine whether the materials are from a batch with abnormal quality. If not, there is no need to remove the materials and continue to use them. If so, proceed to step S4.

[0010] S4. Determine the characteristics of the batch of materials with quality defects. If the batch of materials with quality defects can be used directly, there is no need to remove the materials. If the batch of materials with quality defects cannot be used directly, proceed to step S5.

[0011] S5. Select the appropriate location at the coal tower to install the separation device after the material is unloaded from the silo.

[0012] S6. Remove the belt idler roller assemblies on both sides of the base frame in the belt conveyor device;

[0013] S7. Install a belt support plate at the location where the belt idler assembly has been removed, with the belt support plate in contact with the lower part of the conveyor belt.

[0014] S8. Install a material collector at one end of the belt support plate. The material collector has a discharge port at the bottom. After the material is collected by the material collector, it is transferred through the bottom discharge port to complete the removal of the material in the silo. If the removed material is powder, the batch of material is removed, stored and processed. If the removed material contains lumpy material, and the powdery material can be reused while the lumpy material cannot be used, proceed to step S9.

[0015] S9. After transporting the materials to the stockyard, the materials mixed in with the coking coal are screened by screening equipment to separate the lumpy materials and the coking coal mixture.

[0016] S10. Take samples of the coking coal mixture after screening in step S9 for testing.

[0017] S11. Based on the test results of step S10, formulate a coking coal screening sample usage plan with reference to the coking coal quality standards and their classification.

[0018] Furthermore, in S2, the theoretical time for the abnormal batch of material to leave the silo is equal to (the amount of material in the lower part of the silo before the abnormal batch entered the silo - 1000 tons) / the normal daily consumption of the silo.

[0019] Furthermore, in S5, the separation device is installed at the location of the overpass across the road; the separation device includes a material separation partition, a support column, and a lifting device; the material separation partition is obliquely intersecting the material inflow direction of the conveyor belt, the left and right sides of the separation partition are slidably connected to the support column, and the lifting device is used for lifting the material separation partition.

[0020] Furthermore, in S6, the number of belt idler assemblies removed is 3 or 4 pairs.

[0021] Furthermore, in S7, the belt support plate has an arc-shaped part, which is located directly above the opening of the material collector; in S8, the discharge port is circular.

[0022] Furthermore, in S11, the usage schemes for coking coal screening samples include downgrading, using them as lean coal, or selecting and using them separately in the warehouse.

[0023] Furthermore, during the use of coking coal screening samples, the actual coal blending ratio and coking operation are tracked, and the coke quality is tracked based on the material usage time and coke output time, and corresponding adjustments are made according to the coke quality.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides a method for removing and utilizing materials from large silos, solving the problem of materials being unable to be retrieved from silos. It also allows for rapid resumption of production after the coking coal is removed from the silo. The entire process is low-cost, quick to take effect, and has good results. Furthermore, it can successfully remove, screen, and utilize coking coal from silos when it enters batches with abnormal quality, effectively preventing fluctuations in coke quality. This method can also be used to remove coking coal from silos when spontaneous combustion or other phenomena occur that require timely removal.

[0026] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the material discharge section of the present invention;

[0029] Figure 2 This is a front view of the discharge section of the present invention;

[0030] Figure 3 This is a top view of the discharge section of the present invention;

[0031] Figure 4 This is a schematic diagram of the separation device of the present invention;

[0032] Figure 5 This is a schematic diagram of the belt idler assembly without disassembly in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram showing the contact between the belt support plate and the transport belt in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the installation of a separation device at the location of a covered bridge on a road, according to an embodiment of the present invention.

[0035] Reference numerals in the attached drawings: 1. Base frame; 2. Conveyor belt; 3. Belt idler assembly; 4. Belt support plate; 5. Material collector; 6. Discharge port; 7. Corridor bridge; 8. Material separation partition; 9. Support column; 10. Lifting device. Detailed Implementation

[0036] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Please see Figures 1 to 7 This is a method for removing and using materials from a large silo, comprising the following steps:

[0040] S1. Determine the time of the batch of coking coal with abnormal quality in the silo, and based on this time, determine the weight of coking coal in the lower part of the silo before the batch with abnormal quality entered the silo, and determine the total weight of coking coal in the silo.

[0041] S2. Based on the inventory at the bottom of the silo before the defective batch entered the silo and the normal daily usage of the silo, calculate the theoretical time for the defective batch to exit the silo. The theoretical time for the defective batch to exit the silo is calculated as follows: (Inventory at the bottom of the silo before the defective batch entered the silo - 1000 tons) / Normal daily consumption of the silo. Furthermore, considering that after feeding into the silo, the coking coal inside is not flat but rather uneven, and that there is a poor-quality mixing surface after the defective batch enters the silo, this poor-quality mixing surface is tentatively estimated to be approximately 1000 tons to ensure coke quality. Therefore, 1000 tons are deducted in advance when calculating the time for the defective batch to exit the silo.

[0042] S3. According to the set quality inspection frequency, take samples of the materials in the warehouse for testing and determine whether the materials are from a batch with abnormal quality. If not, there is no need to remove the materials and continue to use them. If so, proceed to step S4.

[0043] S4. Determine the characteristics of the batch of materials with quality defects. If the batch of materials with quality defects can be used directly, there is no need to remove the materials. If the batch of materials with quality defects cannot be used directly, proceed to step S5.

[0044] S5. Select the location of the silo unloading material and transport it to the coal tower, and install the separation device at the location of the road bridge 7. The separation device includes a material separation partition 8, a support column 9 and a lifting device 10. The material separation partition 8 is obliquely intersecting the material direction of the conveyor belt 2. The left and right sides of the separation partition 8 are slidably connected to the support column 9. The lifting device 10 is used for lifting the material separation partition 8. In this embodiment, the lifting device 10 is a manual lifting hoist.

[0045] S6. Remove the three or four pairs of belt idler assemblies 3 on both sides of the base frame 1 in the belt conveyor device;

[0046] S7. Install a belt support plate 4 at the location of the removed belt idler assembly 3. The belt support plate 4 has an arc-shaped part and contacts the lower part of the conveyor belt 2.

[0047] S8. Install a material collector 5 at one end of the belt support plate 4. The arc-shaped part is located directly above the opening of the material collector 5. A circular discharge port 6 is opened at the bottom of the material collector 5. After the material is collected by the material collector 5, it is transferred through the bottom circular discharge port 6 to complete the removal of the material in the silo. If the removed material is powder, the batch of material is removed, stored, and processed. If the removed material contains lumpy material, and the powdery material can be reused while the lumpy material cannot be used, proceed to step S9.

[0048] S9. After transporting the materials to the stockyard, the materials mixed in with the coking coal are screened by screening equipment to separate the lumpy materials and the coking coal mixture.

[0049] S10. Take samples of the coking coal mixture after screening in step S9 for testing.

[0050] S11. Based on the test results of step S10, formulate a coking coal screening sample usage plan with reference to the coking coal quality standards and their classifications. The usage plan for the coking coal screening sample includes downgrading, using it as lean coal, or selecting and using it separately in the warehouse. During the use of the coking coal screening sample, the actual coal blending ratio and coking operation are tracked, and the coke quality is tracked according to the batching time and coke output time, and corresponding adjustments are made according to the coke quality.

[0051] Example

[0052] When coking coal enters the flux (which consists of hard stones) in a silo, the flux mixes with the coking coal. The following describes a method for handling the coking coal entering the flux in a silo:

[0053] Step 1: Determine the time when the coking coal is mixed with the flux in the silo. Based on this time, determine the weight of coking coal in the lower part of the silo before the flux enters the silo, and determine the total weight of coking coal and flux in the silo after the flux enters the silo.

[0054] Step 2: Calculate the flux exit time from the silo based on the amount of flux remaining in the lower part of the silo before the coking coal enters, and the normal daily consumption of the silo. The theoretical flux exit time is calculated as: (attribute of flux remaining in the lower part of the silo before entering the silo - 1000 tons) / normal daily consumption of the silo. Considering that the coking coal in the silo is not flat but uneven after feeding, there will be a poor mixing surface after the flux enters the silo. To ensure coke quality, this poor mixing surface is estimated at 1000 tons, and this 1000 tons should be deducted in advance when calculating the flux exit time.

[0055] Step 3: When flux is about to appear in the material in the silo, arrange for operators to observe below the silo. If flux is found on the belt scale, stop the mixing process.

[0056] Step 4: Select the location 7 of the corridor bridge across the road where the material is transported from the silo to the coal tower and install the separation device. Connect the upper end of the material separation partition 8 to the lifting rope of the manual hoist.

[0057] Step 5: Remove the belt idler assemblies 3 on both sides of the belt conveyor device. The number of belt idler assemblies 3 to be removed is 3 or 4 pairs.

[0058] Step 6: Install belt support plate 4 on the dismantled belt idler assembly 3. The belt support plate 4 has an arc-shaped part and is made of steel plate. The belt support plate 4 is in contact with the lower part of the conveyor belt 2.

[0059] Step 7: Install the material collector 5 at one end of the belt support plate 4, with the arc-shaped part of the belt support plate 4 located directly above the opening of the material collector 5.

[0060] Step 8: Using the material separation baffle, scrape the material off the conveyor belt 2 so that the coking coal transported on the conveyor belt 2 enters the material collector 5 under the action of the material separation baffle. The coking coal enters the corridor bridge 7 through the discharge port 6 at the bottom of the material collector 5 and is transported to the material yard for storage by the truck, thus realizing the removal of material from the silo.

[0061] Step 9: After the extracted coking coal is transported to the stockyard, the flux mixed in the coking coal is screened using screening equipment to separate large pieces of flux and a coking coal mixture (the coking coal mixture is a mixture of coking coal and powder from the flux).

[0062] Step 10: Take samples of the sieved coking coal mixture for testing;

[0063] Step 11: Based on the test results, formulate a usage plan for the coking coal screening samples, referring to the quality standards and classifications of coking coal. This plan may include downgrading the samples, using them as lean coal, or using them separately in a small-scale "external blend." During the use of the coking coal screening samples, the actual coal blending ratio and coking operations will be monitored, and the coke quality will be tracked based on the usage time and coke output time, with appropriate adjustments made according to the coke quality.

[0064] This method can be used to successfully remove, screen, and utilize coking coal from silos when it enters the flux, effectively avoiding fluctuations in coke quality. When coking coal is contaminated with mineral powder or other substances and cannot be used, this method can be used to remove it, preventing damage to the coke oven. It can also be used to remove coking coal from silos when spontaneous combustion occurs or other issues require immediate removal.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for removing and using materials from a large silo, characterized in that, Includes the following steps: S1. Determine the time of the batch of coking coal with abnormal quality in the silo, and based on this time, determine the weight of coking coal in the lower part of the silo before the batch with abnormal quality entered the silo, and determine the total weight of coking coal in the silo. S2. Based on the inventory at the bottom of the silo before the defective batch enters the silo and the normal daily usage of the silo, calculate the theoretical time for the defective batch to leave the silo. Theoretical time for abnormal batch of material to leave the silo = (Amount of abnormal batch in the lower part of the silo before entering the silo - 1000 tons) / Normal daily consumption of the silo; S3. According to the set quality inspection frequency, take samples of the materials in the warehouse for testing and determine whether the materials are from a batch with abnormal quality. If not, there is no need to remove the materials and continue to use them. If so, proceed to step S4. S4. Determine the characteristics of the batch of materials with abnormal quality. If the batch of materials with abnormal quality can be used directly, there is no need to remove the materials. If the batch of materials with abnormal quality cannot be used directly, proceed to step S5. S5. Select the appropriate location at the coal tower to install the separation device after the material is unloaded from the silo. S6. Remove the belt roller assemblies (3) on both sides of the base frame (1) in the belt conveyor device. S7. Install a belt support plate (4) at the location of the removed belt idler assembly (3), with the belt support plate (4) in contact with the lower part of the conveyor belt (2). S8. Install a material collector (5) at one end of the belt support plate (4). The material collector (5) has a discharge port (6) at the bottom. After the material is collected by the material collector (5), the material is transferred through the bottom discharge port (6) to complete the removal of the material in the silo. If the removed material is powder, the batch of material is removed, stored and processed. If the removed material contains lumpy material, and the powdery material can be reused, but the lumpy material cannot be used, then proceed to step S9. S9. After transporting the materials to the stockyard, the materials mixed in with the coking coal are screened by screening equipment to separate the lumpy materials and the coking coal mixture. S10. Take samples of the coking coal mixture after screening in step S9 for testing. S11. Based on the test results of step S10, formulate a coking coal screening sample usage plan with reference to the coking coal quality standards and their classification.

2. The method for removing and using materials from a large silo according to claim 1, characterized in that, In S5, the separation device is installed at the location of the walkway (7) across the road; the separation device includes a material separation partition (8), a support column (9) and a lifting device (10); the material separation partition (8) is obliquely intersecting the material direction of the conveyor belt (2), the left and right sides of the material separation partition (8) are slidably connected to the support column (9), and the lifting device (10) is used for lifting the material separation partition (8).

3. The method for removing and using materials from a large silo according to claim 1, characterized in that, In S6, the number of belt roller assemblies (3) removed is 3 or 4 pairs.

4. The method for removing and using materials from a large silo according to claim 1, characterized in that, In S7, the belt support plate (4) has an arc-shaped part, which is located directly above the opening of the material collector (5); in S8, the discharge port (6) is circular.

5. The method for removing and using materials from a large silo according to claim 1, characterized in that, In S11, the usage schemes for coking coal screening samples include downgrading for use or selecting and using them separately in the warehouse.

6. A method for removing and using materials from a large silo according to claim 5, characterized in that, During the use of coking coal screening samples, the actual coal blending ratio and coking operation are tracked, and the coke quality is tracked based on the material usage time and coke output time, and corresponding adjustments are made according to the coke quality.

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