A coke bin feeding system that combines on-ditch screening and under-ditch feeding.

Abstract

This utility model provides a parallel ore and coke trough feeding system that integrates on-trough screening and under-trough feeding, relating to the field of ironmaking production technology. The ore and coke trough feeding system includes a feeding conveyor belt, a first screening device, an ore and coke trough body, a return conveyor belt, a quantitative feeder, and a feeding conveyor belt. The ore and coke trough body receives the ore or coke after screening by the first screening device; the return conveyor belt transports the fine ore or fine coke after screening by the first screening device; the quantitative feeder weighs the ore or coke according to a set weight and discharges it; the feeding conveyor belt receives the ore or coke discharged by the quantitative feeder and transports it to the furnace top. This utility model enables independent operation of on-trough screening and under-trough feeding, which is beneficial for improving the utilization rate of the on-trough feeding equipment and ensuring timely response of the under-trough feeding to the furnace top charging signal.

Description

Technical Field

[0001] This utility model relates to the field of ironmaking production technology in the iron and steel metallurgical industry, and in particular to a coke trough feeding system that combines on-trough screening and under-trough feeding. Background Technology

[0002] In blast furnace ironmaking, the ore and coke bins and charging system serve as the storage and processing points for raw materials and fuels. Currently, in actual production, the traditional ore and coke bin charging process employs a decentralized screening and weighing method. Various raw materials, including sinter, pellets, lump ore, and coke, are first transported to the ore and coke bins via an overhead feeding system for storage. Then, they undergo screening below the bins to remove fine particles. Raw materials with the correct particle size pass through the screen enter the weighing hopper and are weighed according to a pre-set batch weight. Upon receiving a coke or ore discharge command, the weighed coke or ore is sequentially discharged from the weighing hopper onto a conveyor belt below the bin. This is then transported to the furnace top via a continuously operating charging conveyor belt and added to the furnace for smelting. Undersized powder is transported to a powder ore bin or powder coke bin via a powder conveyor belt for storage, and then transported to other units via a return conveyor belt.

[0003] The following shortcomings exist in the above-mentioned decentralized screening and weighing method for feeding coke into the trough:

[0004] 1. During each feeding cycle, some of the screening equipment under the trough is idle and waiting, resulting in low equipment utilization.

[0005] 2. The screening equipment and weighing hopper are located below the trough. When the furnace top issues the charging command, it is necessary to wait for the screening and weighing to be completed below the trough before the material can be discharged onto the feeding conveyor belt, which increases the feeding cycle and reduces the material feeding capacity.

[0006] 3. During the discharge from the bottom of the tank, there are intervals between different raw materials and fuels in the same batch, which increases the feeding cycle and reduces the material feeding capacity;

[0007] 4. The presence of a weighing hopper at the bottom of the trough increases the height of the coke trough, thereby increasing construction costs;

[0008] 5. The undersized ore powder and coke powder are transported to the ore powder silo and coke powder silo via a powder conveyor belt. This requires the construction of related conveyor belt corridors, ore powder silos, coke powder silos, transfer stations, etc., which increases the land area required for the project and thus increases the construction and operation costs.

[0009] Therefore, a feasible solution is needed to address the aforementioned technical problems. Utility Model Content

[0010] This utility model provides a coke trough feeding system that combines on-trough screening with under-trough feeding in parallel, in order to solve the technical problems of low utilization rate of screening equipment, long feeding cycle and high construction cost caused by under-trough screening.

[0011] This utility model provides a parallel feeding system for a ore and coke trough, comprising a feeding belt conveyor, a first screening device, a ore and coke trough body, a return conveyor conveyor, a quantitative feeder, and a feeding belt conveyor. The first screening device is located below the feeding belt conveyor and is used to screen the ore or coke conveyed by the feeding belt conveyor. The ore and coke trough body is located below the first screening device and is used to receive and discharge the ore or coke screened by the first screening device. The return conveyor conveyor is located below the first screening device and is used to transport the fine ore or fine coke screened by the first screening device. The quantitative feeder is located below the ore and coke trough body and is used to weigh and discharge the ore or coke discharged from the ore and coke trough body according to a set weight. The feeding belt conveyor is located below the quantitative feeder and is used to receive the ore or coke discharged by the quantitative feeder and transport the ore or coke to the top of the furnace.

[0012] In one embodiment of the present invention, the ore and coke trough body includes an ore trough body and a coke trough body, each of the ore trough body and the coke trough body is provided with at least one, and each of the ore trough body and the coke trough body is provided with the first screening device and the quantitative feeder.

[0013] In one embodiment of the present invention, each of the ore bin body and the coke bin body is equipped with at least one of the first screening devices; and / or, each of the ore bin body and the coke bin body is provided with at least one discharge port, and a quantitative feeder is provided below each discharge port, and a gate is provided at the discharge port.

[0014] In one embodiment of the present invention, the feeding conveyor belt machine includes a discharger, the discharger having at least one discharge port, and the first screening device is disposed below each discharge port; and / or, the number of discharge ports of the return conveyor belt machine corresponds one-to-one with the number of discharge ports of the discharger.

[0015] In one embodiment of this utility model, the feeding conveyor belt includes an ore feeding conveyor belt and a coke feeding conveyor belt, and the return conveyor belt includes a fine ore return conveyor belt and a fine coke return conveyor belt. The ore conveyed by the ore feeding conveyor belt is screened by the first screening equipment and flows to the ore bin body and the fine ore return conveyor belt respectively. The coke conveyed by the coke feeding conveyor belt is screened by the first screening equipment and flows to the coke bin body and the fine coke return conveyor belt respectively.

[0016] In one embodiment of the present invention, the ore and coke trough feeding system further includes a fine ore trough body and a fine coke trough body. The fine ore trough body is used to receive the fine ore conveyed by the fine ore return conveyor belt, and the fine coke trough body is used to receive the fine coke conveyed by the fine coke return conveyor belt.

[0017] In one embodiment of the present invention, a second screening device is provided between the coke powder trough body and the coke powder return conveyor belt. The coke powder trough body includes a first coke powder trough body and a second coke powder trough body. The first coke powder trough body is used to receive small pieces of coke powder screened by the second screening device, and the second coke powder trough body is used to receive granular coke powder screened by the second screening device.

[0018] In one embodiment of the present invention, a gate is provided at the discharge port of the first coke trough body, and a quantitative feeder is provided below the first coke trough body. The small pieces of coke pulverized by the quantitative feeder are conveyed to the feeding conveyor belt.

[0019] In one embodiment of the present invention, a feeder and an external conveyor belt are sequentially arranged below the main body of the ore powder trough and the main body of the second coke powder trough, and a gate is provided at the discharge port of both the main body of the ore powder trough and the main body of the second coke powder trough.

[0020] In one embodiment of the present invention, a material level sensor is provided in the body of the ore and coke trough, the body of the ore powder trough, and the body of the coke powder trough. The material level sensor is used to detect whether the fuel in the body of the ore and coke trough, the body of the ore powder trough, and the body of the coke powder trough is at the replenishment level or the full level.

[0021] The beneficial effects of this utility model are as follows: This utility model proposes a ore and coke trough feeding system that combines on-trough screening and under-trough feeding. The first screening device screens the ore or coke conveyed by the feeding belt conveyor, and discharges the screened ore or coke into the ore and coke trough body. The screened fine ore or coke is discharged to the return conveyor, thus achieving on-trough screening. A quantitative feeder is installed below the ore and coke trough body. The ore or coke discharged from the ore and coke trough body is weighed according to a set weight by the quantitative feeder and directly conveyed to the feeding belt conveyor for feeding to the furnace top. This eliminates under-trough screening, which improves the under-trough discharge capacity and equipment operating rate, and helps reduce engineering investment and operating costs. Furthermore, the on-trough screening and under-trough feeding can work independently, which helps reduce the idle time of the on-trough feeding belt conveyor and the first screening device, thereby improving the utilization rate of the on-trough feeding equipment and ensuring timely response of the under-trough feeding to the furnace top charging signal. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the structure of a coke trough feeding system that combines on-trough screening and under-trough feeding in one embodiment of the present invention.

[0025] The attached figures are labeled as follows:

[0026] 1-First screening equipment; 2-Quantitative feeder; 3-Feeding conveyor belt; 4-Ore trough body; 41-Gate; 5-Coke trough body; 6-Unloader; 61-Unloading port; 7-Ore feeding conveyor belt; 8-Coke feeding conveyor belt; 9-Powdered ore return conveyor belt; 10-Powdered coke return conveyor belt; 11-Powdered ore trough body; 12-First powdered coke trough body; 13-Second powdered coke trough body; 14-Second screening equipment; 15-Feeder; 16-External transport conveyor belt. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0030] Please see Figure 1 , Figure 1 This utility model provides a coke trough feeding system that combines on-trough screening and under-trough feeding in one embodiment. The coke trough feeding system includes a feeding conveyor belt, a first screening device 1, a coke trough body, a return conveyor belt, a quantitative feeder 2, and a feeding conveyor belt 3.

[0031] The feeding conveyor belt conveyor is used to transport ore or coke to the first screening device 1 located below it. The first screening device 1 screens the ore or coke to separate ore or coke, fine ore, or fine coke. The ore or coke screened by the first screening device 1 is discharged into the ore and coke trough body, while the fine ore or fine coke is discharged to the return conveyor belt, completing the on-trough screening. The return conveyor belt facilitates the recycling of fine ore or fine coke.

[0032] A quantitative feeder 2 is installed below the main body of the ore and coke trough. The quantitative feeder 2 weighs the ore or coke discharged from the ore and coke trough according to a set weight and conveys the weighed ore or coke to the feeding conveyor belt 3. Subsequently, the feeding conveyor belt 3 directly conveys the proportioned ore or coke to the top of the furnace for feeding, thereby eliminating the need for screening under the trough. This is beneficial for improving the discharge capacity under the trough and the equipment operating rate, and for reducing engineering investment and operating costs. It also helps to reduce the height between the ore and coke trough and the feeding conveyor belt 3, thereby reducing the crushing rate of the ore or coke under the trough.

[0033] Furthermore, the screening above the trough and the feeding below the trough can operate independently. The screening above the trough is not controlled by the furnace top charging signal. As long as the capacity of the ore and coke trough body is sufficient, the screening above the trough can continuously replenish the ore and coke trough body, which helps to reduce the idle time of the conveyor belt for feeding above the trough and the first screening equipment 1, thereby improving the utilization rate of the feeding equipment above the trough. Moreover, due to the improved utilization rate of the feeding equipment above the trough, the ore or coke in the ore and coke trough body is always in a state of sufficient supply, which helps to ensure that the feeding below the trough responds to the furnace top charging signal in a timely manner to feed the furnace top.

[0034] In some embodiments, a level sensor is installed inside the ore and coke bin. When the level sensor detects that the ore or coke in the ore and coke bin is at the replenishment level, the feeding conveyor belt and the first screening device 1 are turned on to replenish the ore and coke bin. When the level sensor detects that the ore or coke in the ore and coke bin is at the full level, the feeding conveyor belt and the first screening device 1 are turned off to stop replenishing the ore and coke bin.

[0035] For example, level sensors include, but are not limited to, radar sensors.

[0036] In some embodiments, the ore and coke bin body includes an ore bin body 4 and a coke bin body 5. The ore bin body 4 is used to store large pieces of ore screened by the first screening device 1, and the coke bin body 5 is used to store large pieces of coke screened by the first screening device 1.

[0037] Furthermore, at least one ore trough body 4 and one coke trough body 5 are provided. The number of ore trough bodies 4 and coke trough bodies 5 can be set to 1, 2, 3, 4, etc., respectively, and can be adapted according to actual needs. Preferably, multiple ore trough bodies 4 and coke trough bodies 5 are provided for storing different types of ore or coke, which is also conducive to improving the utilization rate of the feeding equipment on the trough.

[0038] It should be noted that each ore bin body 4 and coke bin body 5 is equipped with a first screening device 1. When any ore bin body 4 or coke bin body 5 needs to be replenished, the first screening device 1 will be activated to replenish the ore bin body 4 or coke bin body 5 that needs to be replenished. This helps to ensure that the ore bin body 4 and coke bin body 5 are always in a full state, and also helps to avoid the shutdown or suspension of material supply of the feeding belt, thereby improving the utilization rate of the feeding belt.

[0039] Furthermore, each ore bin body 4 and coke bin body 5 is equipped with a quantitative feeder 2. After receiving the furnace top charging instruction, one ore bin body 4 and coke bin body 5 is selected for discharge, and the matching quantitative feeder 2 is turned on to quantitatively feed the feeding conveyor belt 3, which helps to improve the feeding capacity and efficiency of the bin.

[0040] In one example, to improve the feeding efficiency of the ore bin body 4 and coke bin body 5, each ore bin body 4 and coke bin body 5 is equipped with at least one first screening device 1. The number of first screening devices 1 can be set to one, two, three, etc., adapted to actual needs. In this embodiment, each ore bin body 4 and coke bin body 5 is equipped with two first screening devices 1, which is beneficial for achieving rapid feeding of the ore bin body 4 and coke bin body 5.

[0041] In some embodiments, the feed conveyor belt includes a discharger 6 for unloading raw materials and fuels located on the feed conveyor belt, and a first screening device 1 is located below the discharger 6 to screen the raw materials and fuels unloaded by the discharger 6.

[0042] The unloader 6 has at least one discharge port 61. The number of discharge ports 61 can be set to one, two, etc., depending on actual needs. Each discharge port 61 is equipped with a first screening device 1 below it, so that the unloader 6 can feed at least one first screening device 1 at the same time. This is beneficial to improving the screening and loading capacity of the feeding belt and the first screening device 1, and thus helps to shorten the feeding time of the coke bin body.

[0043] For example, the unloader 6 can be configured as a plow unloader, and the first screening device 1 can be configured as a vibrating screen.

[0044] In one example, each ore bin body 4 and coke bin body 5 is provided with at least one discharge port, which helps to improve the discharge efficiency of the ore bin body 4 and coke bin body 5. The number of discharge ports can be set to one, two, etc., and can be adapted according to actual needs.

[0045] Each discharge port is equipped with a quantitative feeder 2 to ensure that the ore or coke flowing out of the discharge port is weighed, which helps to ensure the ratio of ore and coke flowing into the furnace top. A gate 41 is also installed at the discharge port. When the ore or coke on the quantitative feeder 2 meets the quantitative requirements, the gate 41 closes, preventing the ore or coke in the ore-coke bin from being discharged through the discharge port. This helps to ensure that the quantitative feeder 2 conveys a fixed amount of ore or coke to the conveyor belt 3.

[0046] For example, when the number of ore bin body 4 and coke bin body 5 is set to 1, when the material level sensor detects that the fuel in the ore bin body 4 or coke bin body 5 is in the feeding position and in the discharging state, the gate 41 is opened, and the ore bin body 4 or coke bin body 5 simultaneously feeds and discharges.

[0047] When the number of ore bins 4 and coke bins 5 is set to multiple, when the material level sensor detects that the ore or coke in the ore bin 4 or coke bin 5 is in the feeding position and in the discharge state, the gate 41 of the ore bin 4 or coke bin 5 that is currently discharging is closed, and the gate 41 of another ore bin 4 or coke bin 5 that is in the full position or not in the feeding position is opened for discharge.

[0048] In one example, to ensure that the conveying capacity of the return conveyor belt matches the unloading capacity of the unloader 6, the number of return conveyor belts and the number of unloading ports 61 of the unloader 6 are set in a one-to-one correspondence. For example, if the number of unloading ports 61 of the unloader 6 is set to 2, then the number of return conveyor belts is also set to 2.

[0049] In some embodiments, the feeding conveyor belts include an ore feeding conveyor belt 7 and a coke feeding conveyor belt 8, and the return conveyor belts include a fine ore return conveyor belt 9 and a fine coke return conveyor belt 10. The ore conveyed by the ore feeding conveyor belt 7 is screened by the first screening equipment 1 and then flows to the ore bin body 4 and the fine ore return conveyor belt 9, respectively. The coke conveyed by the coke feeding conveyor belt 8 is screened by the first screening equipment 1 and then flows to the coke bin body 5 and the fine coke return conveyor belt 10, thereby achieving screening and diversion of the ore or coke.

[0050] In some embodiments, the ore and coke trough feeding system further includes a fine ore trough body 11 and a fine coke trough body. The fine ore trough body 11 is used to receive fine ore conveyed by the fine ore return conveyor 9, and the fine coke trough body is used to receive fine coke conveyed by the fine coke return conveyor 10, thereby realizing the classification and recycling of fine ore and fine coke.

[0051] In one example, a second screening device 14 is provided between the coke trough body and the coke return conveyor belt 10. The coke trough body includes a first coke trough body 12 and a second coke trough body 13. The first coke trough body 12 is used to receive small pieces of coke sifted by the second screening device 14, and the second coke trough body 13 is used to receive granular coke sifted by the second screening device 14, thereby achieving further screening of the coke and improving the utilization rate of the coke.

[0052] In one example, a quantitative feeder 2 is provided below the first coke pulverizer body 12, and a gate 41 is provided at the discharge port of the first coke pulverizer body 12. It should be noted that the small pieces of coke pulverizer discharged through the discharge port of the first coke pulverizer body 12 are weighed quantitatively by the quantitative feeder 2 and then conveyed to the feeding conveyor belt 3, and fed into the furnace top together with the coke fuel in the coke pulverizer body.

[0053] Once the small pieces of coke on the quantitative feeder 2 meet the quantitative requirements, the gate 41 closes so that the small pieces of coke in the first coke trough body 12 no longer discharge through the discharge port, which helps to ensure that the quantitative feeder 2 conveys a quantitative amount of small pieces of coke to the feeding conveyor belt 3.

[0054] In one example, a level sensor is installed inside the first coke pulverizer body 12. When the level sensor detects that small pieces of coke pulverizer inside the first coke pulverizer body 12 are at the replenishment level, the first coke pulverizer body 12 is replenished; when the level sensor detects that small pieces of coke pulverizer inside the first coke pulverizer body 12 are at the full level, replenishment to the first coke pulverizer body 12 is stopped. It should be noted that the gate 41 of the first coke pulverizer body 12 is not affected by the level sensor.

[0055] In some embodiments, a feeder 15 and an external conveyor belt 16 are provided below both the ore fines trough body 11 and the coke powder trough body 13, and both the ore fines trough body 11 and the coke powder trough body 13 are equipped with gates 41 at their discharge ports. When the gate 41 of the ore fines trough body 11 is opened, the ore fines in the ore fines trough body 11 are discharged to the feeder 15, and then conveyed by the feeder 15 to the external conveyor belt 16 to be discharged from the ore and coke trough feeding system. When the gate 41 of the second coke powder trough body 13 is opened, the particulate coke in the second coke powder trough body 13 is discharged to the feeder 15, and then conveyed by the feeder 15 to the external conveyor belt 16 to be discharged from the ore and coke trough feeding system. It should be noted that the conveyor belt 16 located below the ore powder trough body 11 and the coke powder trough body 13 is not the same conveyor belt. The conveyor belt 16 located below the ore powder trough body 11 is used to transport ore powder, and the conveyor belt 16 located below the coke powder trough body 13 is used to transport granular coke powder.

[0056] In one example, both the ore fines trough body 11 and the coke fines trough body 13 are equipped with level sensors. When the level sensor detects that the ore fines or coke fines in the ore fines trough body 11 or the coke fines trough body 13 are at full level, the gate 41 of the ore fines trough body 11 or the coke fines trough body 13 opens to discharge material. When the level sensor detects that the ore fines or coke fines in the ore fines trough body 11 or the coke fines trough body 13 are at the replenishment level, the gate 41 of the ore fines trough body 11 or the coke fines trough body 13 closes to replenish material.

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A coke trough feeding system that combines on-trough screening and under-trough feeding in parallel, characterized in that, include: Conveyor belt feeder; The first screening device is located below the feeding belt conveyor and is used to screen the ore or coke conveyed by the feeding belt conveyor. The ore and coke trough body is located below the first screening equipment and is used to receive and discharge the ore or coke after being screened by the first screening equipment. A return conveyor belt is installed below the first screening equipment and is used to transport the powdered ore or coke after it has been screened by the first screening equipment. A quantitative feeder is installed below the main body of the ore and coke trough, and is used to weigh and discharge the ore or coke discharged from the main body of the ore and coke trough according to a set weight. A feeding conveyor belt is installed below the quantitative feeder to receive the ore or coke discharged from the quantitative feeder and to transport the ore or coke to the top of the furnace.

2. The system for feeding the coke oven with the material on the sifting screen above the slot in parallel with feeding the material under the slot according to claim 1, characterized in that: The ore and coke trough body includes an ore trough body and a coke trough body, each of which is provided with at least one ore trough body and a coke trough body, and each of the ore trough body and the coke trough body is equipped with the first screening device and the quantitative feeder.

3. The system for feeding the coke oven with the material on the sifting screen above the slot in parallel with feeding the material under the slot according to claim 2, characterized in that: Each of the ore bins and coke bins is equipped with at least one of the first screening devices; and / or, each of the ore bins and coke bins is provided with at least one discharge port, and a quantitative feeder is provided below each discharge port, and a gate is provided at the discharge port.

4. The system for feeding the coke oven with the material on the sizer above the slot according to any of claims 1 - 3, characterized in that: The feeding conveyor belt machine includes a discharger, the discharger having at least one discharge port, and the first screening device is arranged below each discharge port; and / or, the number of discharge ports of the return conveyor belt machine corresponds one-to-one with the number of discharge ports of the discharger.

5. A system for feeding a coke oven with ore on top of the slot according to claim 2 or 3, characterized in that: The feeding conveyor belt includes an ore feeding conveyor belt and a coke feeding conveyor belt. The return conveyor belt includes a fine ore return conveyor belt and a fine coke return conveyor belt. The ore conveyed by the ore feeding conveyor belt is screened by the first screening equipment and flows to the ore bin body and the fine ore return conveyor belt respectively. The coke conveyed by the coke feeding conveyor belt is screened by the first screening equipment and flows to the coke bin body and the fine coke return conveyor belt respectively.

6. The coke trough feeding system with parallel on-trough screening and under-trough feeding as described in claim 5, characterized in that: The ore and coke trough feeding system also includes a fine ore trough body and a fine coke trough body. The fine ore trough body is used to receive the fine ore conveyed by the fine ore return conveyor belt, and the fine coke trough body is used to receive the fine coke conveyed by the fine coke return conveyor belt.

7. The coke bin feeding system with parallel on-ditch screening and under-ditch feeding as described in claim 6, characterized in that: A second screening device is provided between the coke trough body and the coke return conveyor belt. The coke trough body includes a first coke trough body and a second coke trough body. The first coke trough body is used to receive small pieces of coke sifted by the second screening device, and the second coke trough body is used to receive granular coke sifted by the second screening device.

8. The ore and coke bin feeding system with parallel on-ditch screening and under-ditch feeding as described in claim 7, characterized in that: A gate is provided at the discharge port of the first coke trough body, and a quantitative feeder is provided below the first coke trough body. The small pieces of coke pulverized by the quantitative feeder are conveyed to the feeding conveyor belt.

9. A system for feeding a coke oven with ore on top of the slot according to claim 7 or 8, characterized in that: A feeder and an external conveyor belt are sequentially installed below both the main body of the ore powder trough and the main body of the second coke powder trough, and gates are installed at the discharge ports of both the main body of the ore powder trough and the second coke powder trough.

10. The system for feeding the coke oven with the material on the sifting screen above the slot in parallel with feeding the material under the slot according to claim 9, characterized in that: A material level sensor is installed in each of the ore and coke troughs, the ore and coke troughs, and the ore and coke troughs. The material level sensor is used to detect whether the fuel in the ore and coke troughs, the ore and coke troughs, and the ore and coke troughs is at the replenishment level or the full level.

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