Blast furnace fan-shaped area material distribution method

Abstract

The invention discloses a blast furnace fan-shaped area material distribution method, relates to the technical field of blast furnace smelting, and can improve the accuracy of chute material distribution. The blast furnace fan-shaped area material distribution method comprises the following steps that the range of a second fan-shaped area of a blast furnace material distribution area is determined, a blast furnace material area comprises a first fan-shaped area and the second fan-shaped area, and the current material thickness of the second fan-shaped area is smaller than that of the first fan-shaped area; the chute is controlled to conduct reciprocating material distribution in the second fan-shaped area, and the maximum speed of reciprocating material distribution is the second speed; wherein the maximum material distribution speed of the chute in the first fan-shaped area is a first speed, and the first speed is greater than the second speed.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace smelting, and in particular to a method for distributing charges in a fan-shaped area of ​​a blast furnace. Background Art

[0002] At present, with the development of intelligent, efficient and green concepts in steel enterprises. The stable production of large and medium-sized blast furnaces is considered by the industry to be the best solution to improve the economic benefits of enterprises and reduce production costs. Abnormal distribution conditions in the furnace are considered to be the primary factor affecting the stability of the blast furnace. The abnormal distribution conditions in the furnace are often handled by fan-shaped area distribution. At this stage, this method is completed by manual operation, and the effect is extremely unstable. The demand for seeking a new process and new method to achieve fan-shaped area distribution is becoming more and more urgent. A method to achieve intelligent fan-shaped area distribution of blast furnaces can fundamentally solve this problem, because intelligence can minimize the impact of human factors. This process is completely completed by computer control systems and has positive promotion value.

[0003] However, at present, the method of fan-shaped area distribution in the field of blast furnace distribution of steel enterprises is basically manual operation. In terms of method and manual judgment of the fan-shaped distribution area range, fan-shaped distribution area angle, fan-shaped distribution weight and follow-up work after completing the fan-shaped distribution, this puts high demands on the technical level of the operator and the specific operation method, so the final fan-shaped area distribution effect often does not meet expectations. Fan-shaped area distribution has always been a technical problem that plagues the field of blast furnace distribution.

[0004] In summary, how to improve the accuracy of chute material distribution is an urgent problem to be solved. Summary of the invention

[0005] A method for distributing material in a sector area of ​​a blast furnace provided in an embodiment of the present application can improve the accuracy of distributing material in a chute.

[0006] The present application provides a method for distributing material in a fan-shaped area of ​​a blast furnace, comprising:

[0007] Determine the range of the second sector area of ​​the blast furnace charge distribution area, wherein the blast furnace charge area includes the first sector area and the second sector area, and the current material thickness of the second sector area is less than the current material thickness of the first sector area;

[0008] Control the chute to reciprocate in the second sector area, and the maximum speed of the reciprocating material distribution is the second speed;

[0009] The maximum material distribution speed of the chute in the first sector area is the first speed, and the first speed is greater than the second speed.

[0010] In some embodiments, the step of controlling the chute to reciprocate in the second sector area comprises:

[0011] The second sector-shaped area is divided into a middle area and two edge areas, wherein the middle area is arranged between the two edge areas;

[0012] The chute is controlled to distribute materials to the middle area at the second speed.

[0013] In some embodiments, when the chute is in the edge area, the material distribution operation of the chute is stopped, the material is in the edge area of ​​the second fan-shaped area due to gravity, and the chute is at the side edge position of the second fan-shaped area due to inertia.

[0014] In some embodiments, after the material distribution operation of the chute toward one side edge of the second fan-shaped area is completed, the inclination angle of the chute is adjusted, and the material distribution operation of the chute toward the other side edge is performed.

[0015] In some embodiments, the total material distribution time of the chute in the second sector-shaped area is the ratio of the total material distribution mass in the second sector-shaped area to the material distribution weight of the chute per unit time.

[0016] In some embodiments, the number of round trips of the chute corresponding to the second sector-shaped area is the ratio of the total distribution time to the single distribution time, wherein, if it cannot be divided evenly, the number of round trips is obtained by taking an integer and adding 1, and the single distribution time in the reciprocating distribution is the distribution time of the chute in one direction in the second sector-shaped area.

[0017] In some embodiments, the material distribution time is counted after the sealing valve and the throttle valve at the chute tank are opened simultaneously;

[0018] The sealing valve and the throttle valve are electrically connected to the control cabinet.

[0019] In some embodiments, after the step of controlling the chute to reciprocate and distribute material in the second sector area, the step includes:

[0020] The chute is controlled to distribute materials in one direction in the blast furnace material area at a first speed.

[0021] In some embodiments, a ratio of the second speed to the first speed is less than or equal to 1 / 2.

[0022] In some embodiments, the fan-shaped angle of the second fan-shaped area is greater than or equal to 30° and less than or equal to 180°.

[0023] The embodiments of the present application include at least the following beneficial effects:

[0024] By reducing the rotation speed of the chute and reducing the rotation angle of the chute due to inertia, the material falling outside the second sector area due to centrifugal force is reduced, making it easier for the material to fall into the second sector area, thereby improving the accuracy of the chute material distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic flow chart of a method for distributing charges in a fan-shaped area of ​​a blast furnace provided in an embodiment of the present application;

[0026] Figure 2 A schematic partial structural diagram of a blast furnace provided in an embodiment of the present application;

[0027] Figure 3 A schematic partial structural diagram of a second sector-shaped area provided in an embodiment of the present application;

[0028] Figure 4 A schematic partial structural diagram of another blast furnace provided in an embodiment of the present application;

[0029] Figure 5 A schematic material distribution sequence diagram of a chute provided in an embodiment of the present application.

[0030] The reference numerals in the figure represent respectively:

[0031] 100, chute; 200, blast furnace charging area; 210, first fan-shaped area; 220, second fan-shaped area; 221, edge area; 222, middle area. DETAILED DESCRIPTION

[0032] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0033] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0034] A method for distributing material in a sector area of ​​a blast furnace provided in an embodiment of the present application can improve the accuracy of distributing material in the chute 100 .

[0035] Figure 1 A schematic diagram of a method for distributing charges in a fan-shaped area of ​​a blast furnace provided in an embodiment of the present application, see Figure 1 The present application provides a method for distributing charges in a fan-shaped area of ​​a blast furnace, comprising:

[0036] S100: Determine the range of the second sector-shaped area of ​​the blast furnace charge distribution area.

[0037] Figure 2 A schematic partial structural diagram of a blast furnace provided in an embodiment of the present application, such as Figure 2 As shown, exemplarily, the blast furnace charging area 200 includes a first fan-shaped area 210 and a second fan-shaped area 220, the current material thickness corresponding to the second fan-shaped area 220 is less than the current material thickness corresponding to the first fan-shaped area 210, and the second fan-shaped area 220 is an area where the charging thickness needs to be increased.

[0038] S200: Controlling the chute to distribute materials back and forth in the second sector-shaped area, and the maximum speed of the reciprocating distribution is the second speed.

[0039] Exemplarily, the speed of the chute 100 corresponding to the edge of the second sector-shaped area 220 may be 0 or close to 0.

[0040] Exemplarily, the maximum material distribution speed of the chute 100 in the first sector area 210 is the first speed, and the first speed is greater than the second speed.

[0041] Figure 3 A schematic partial structural diagram of a second sector area 220 provided in an embodiment of the present application, such as Figure 3 As shown, in step S100, the charge surface of the furnace top is circular. When the furnace condition of the blast furnace is abnormal, a gas channel from bottom to top will be formed in the charge layer in the blast furnace, and the gas flow distribution on the charge surface is uneven. The gas flow in the thin charge surface area is strong, and the gas flow in the normal charge surface area is weak, so that the gas flow is not in the center of the charge surface. By judging the strength of the gas flow, the second fan-shaped area 220 can be determined. After that, the second fan-shaped area 220 is distributed, which can thicken the charge surface, thereby driving the gas flow to the center of the charge surface and improving the gas flow direction in the blast furnace.

[0042] Exemplarily, in step S200, since the chute 100 needs to move back and forth, there is a position where the chute 100 has a speed of 0. For example, the speed of the chute 100 corresponding to the edge position of the second sector area 220 can be 0. The chute 100 can be accelerated from an initial speed of 0 to a second speed and distribute materials at a uniform speed at the second speed.

[0043] Exemplarily, when the gas flow on the material surface of the blast furnace is evenly distributed, the chute 100 distributes materials at a first speed in the entire material surface, and the value of the first speed is greater than the value of the second speed, that is, the distribution speed of the second fan-shaped area 220 is lower than the normal distribution speed. The second fan-shaped area 220 can generate a smaller centrifugal force. For the edge area of ​​the second fan-shaped area 220, it is easier to control the stopping distance of the chute 100 to avoid distribution outside the second fan-shaped area 220, so that the distribution operation of the second fan-shaped area 220 can be better performed.

[0044] In some examples, the charging area of ​​the blast furnace is a 360° circular plane area, and the time for the chute 100 to rotate 360° is, for example, 6 seconds, which corresponds to the first speed. When the gas flow is uneven, the charging speed of the chute 100 is adjusted to the second speed, for example, the setting parameters of the variable frequency speed regulator are changed from the first speed to the second speed. For example, the time for the chute 100 to rotate 360° at the first speed before adjustment is 6 seconds, and the time for the chute 100 to rotate 360° at the second speed after adjustment is 12 seconds, that is, the charging speed of the chute 100 is reduced by half. Therefore, for the second sector area 220 with a relatively small angle, a slower charging speed is more conducive to controlling the centrifugal force, and the interval time of the reciprocating operation of the chute 100 is longer, which is more conducive to avoiding the phenomenon that the variable frequency speed regulator is damaged due to frequent operation.

[0045] Exemplarily, step S200 may include:

[0046] S210: dividing the second sector-shaped area into a middle area and two edge areas, wherein the middle area is arranged between the two edge areas;

[0047] S220: Control the chute to distribute materials to the middle area at the second speed.

[0048] See also Figure 2 In some examples, the middle area 222 is used for uniform speed distribution, and the edge area 221 is a buffer area for the inertial rotation of the chute 100. For example, the chute 100 stops operating when it corresponds to the edge area 221, so that the chute 100 continues to rotate by inertia. Since the second speed is lower than the first speed, the angle of rotation of the chute 100 due to inertia is smaller, and the area of ​​the edge area is smaller.

[0049] Exemplarily, the angle of the edge area 221 corresponding to the second sector area 220 can be adjusted based on the second speed to ensure that the chute 100 can stop at the edge of the second sector area 220. In some examples, if the second speed is large, the angle corresponding to the edge area 221 for the inertial rotation of the chute 100 can be increased. Alternatively, in some examples, if the second speed is small, the angle corresponding to the edge area 221 for the inertial rotation of the chute 100 can be reduced.

[0050] Figure 4 A schematic partial structural diagram of another blast furnace provided in an embodiment of the present application, such as Figure 4 As shown, exemplarily, when the chute 100 is in the edge area 221, or at the boundary between the edge area 221 and the middle area 222, the material distribution operation of the chute 100 is stopped, the material in the chute 100 falls into the edge area 221 by gravity, and the chute 100 stops at the edge of the second fan-shaped area 220 by inertia.

[0051] Exemplarily, the chute 100 can be regulated by a variable frequency speed regulator, which achieves the purpose of speed regulation by changing the power supply frequency of the motor stator winding. After the chute 100 sweeps through the edge area 221 and the center area 222, the speed is reduced to 0. In some examples, when the chute 100 rotates from the middle area 222 to the edge of the edge area 221, the variable frequency speed regulator can stop supplying power, so that the chute 100 continues to rotate by inertia and can stop at the edge of the second sector area 220.

[0052] In some examples, the variable frequency speed regulator is a controllable digital silicon variable frequency speed regulator.

[0053] Exemplarily, step S220 may include:

[0054] S230: After the material distribution operation of the chute toward one side edge of the second sector-shaped area is completed, the inclination angle of the chute is adjusted, and the material distribution operation of the chute toward the other side edge is performed.

[0055] Figure 5 A schematic material distribution sequence diagram of a chute 100 provided in an embodiment of the present application, such as Figure 5 As shown, in some examples, after the unidirectional material distribution operation is completed, the tilt angle of the chute 100 is adjusted so that the materials falling before and after the adjustment of the chute 100 can correspond to different material distribution positions, and the reverse material distribution operation of the chute 100 can be performed after the adjustment operation of the chute 100 is completed. Exemplarily, the tilt angle of the chute 100 is the angle between the chute 100 and one of the cross sections of the blast furnace.

[0056] Exemplarily, the total material distribution time of the chute 100 in the second sector-shaped area 220 is the ratio of the required total material distribution mass of the second sector-shaped area 220 to the material distribution weight of the chute 100 per unit time.

[0057] In some examples, the second speed is slower than the first speed, and the cloth is more likely to fall into the second sector-shaped area 220, and very little cloth falls outside the second sector-shaped area 220. At the same time, after the variable frequency controller stops supplying power to the chute 100 in the edge area, the chute 100 with a lower speed can stop the cloth operation more quickly. In some examples, the time for the chute 100 to go from the deceleration state to the stop state is short, and this time can be ignored. Therefore, the total amount of cloth in the second sector-shaped area 220 can be determined by multiplying the cloth rate per unit time and the time.

[0058] Exemplarily, the number of round trips of the chute 100 corresponding to the second sector area 220 is the ratio of the total material distribution time to the single material distribution time.

[0059] For example, when the total cloth-laying time and the single cloth-laying time cannot be divided evenly, the integer is taken and then added with 1 to obtain the number of round trips.

[0060] Exemplarily, a single material distribution time in the reciprocating material distribution is the time it takes for the chute 100 to distribute material once in a single direction in the second sector-shaped area 220 .

[0061] Exemplarily, the material distribution time is counted after the sealing valve and the throttle valve at the material tank of the chute 100 are opened at the same time, and the sealing valve and the throttle valve are also electrically connected to the control cabinet.

[0062] Exemplarily, it also includes reverse distribution after a braking time after the one-way operation is completed.

[0063] In some examples, the braking time is the recovery time of the variable frequency speed regulator, so as to avoid the variable frequency speed regulator being damaged due to frequent control of the start and stop of the chute 100. In some examples, the braking time may be 1 second.

[0064] Exemplarily, the process after step S200 includes: controlling the chute 100 to distribute materials in a single direction in the blast furnace material area at a first speed, that is, performing a normal cyclic distribution operation.

[0065] For example, the magnitude of the second speed may be a certain proportion of the magnitude of the first speed, for example, the second speed may be half, one third, two thirds or other proportions of the first speed.

[0066] Exemplarily, the ratio of the second speed to the first speed is less than or equal to 1 / 2.

[0067] In some examples, a smaller second speed is more conducive to improving the control effect of the variable frequency speed regulator on the chute 100, so that the angle of rotation of the chute 100 after deceleration due to inertia is smaller, avoiding the material falling outside the second fan-shaped area 220 due to centrifugal force, thereby improving the material distribution accuracy of the chute 100 corresponding to the second fan-shaped area 220.

[0068] Exemplarily, the fan-shaped angle of the second fan-shaped area 220 is greater than or equal to 30° and less than or equal to 180°.

[0069] For example, the chute 100 or the variable frequency speed regulator of the present application can be set through Unity Pro XL software. For example, the material distribution angle of the chute 100 is set in the program, and the chute 100 stops at the starting position of the second fan-shaped material distribution area.

[0070] For example, the rotation speed of the chute 100 can be reduced by modifying the setting parameters of the variable frequency speed regulator.

[0071] In some examples, the parameters of the variable speed regulator can be modified within a range greater than zero and less than the first speed as required to meet different speed requirements, thereby reducing the phenomenon of the cloth exceeding the edge of the second sector area 220 due to centrifugal force and achieving precise control of the cloth position.

[0072] In a second aspect, the present application proposes a blast furnace fan-shaped area distribution device, including an acquisition module and a control module.

[0073] The acquisition module is used to determine the range of the second fan-shaped area 220 of the blast furnace charging area, wherein the blast furnace material area includes the first fan-shaped area 210 and the second fan-shaped area 220, and the current material thickness of the second fan-shaped area 220 is less than the current material thickness of the first fan-shaped area 210.

[0074] The control module is used to control the chute 100 to distribute materials back and forth in the second sector-shaped area 220 , and the maximum speed of the reciprocating distribution is the second speed.

[0075] Exemplarily, the maximum material distribution speed of the chute in the first sector area is a first speed, and the first speed is greater than the second speed.

[0076] Exemplarily, the control module is further used to divide the second sector-shaped area 220 into a middle area 222 and two edge areas 221 , and the middle area 222 is arranged between the two edge areas 221 ;

[0077] The chute 100 is controlled to distribute material to the middle area 222 at a second speed.

[0078] Exemplarily, the control module is also used to stop the material distribution operation of the chute 100 when the chute 100 is in the edge area 221, the material is in the edge area of ​​the second fan-shaped area 220 due to gravity, and the chute 100 is at the side edge position of the second fan-shaped area 220 due to inertia.

[0079] Exemplarily, after the material distribution operation of the chute 100 toward one side edge of the second fan-shaped area 220 is completed, the inclination angle of the chute 100 is adjusted, and the material distribution operation of the chute 100 toward the other side edge is performed.

[0080] Exemplarily, the total material distribution time of the chute 100 in the second sector-shaped area 220 is the ratio of the total material distribution mass in the second sector-shaped area 220 to the material distribution weight of the chute 100 per unit time.

[0081] Exemplarily, the number of round trips of the chute 100 corresponding to the second sector area 220 is the ratio of the total material distribution time to the single material distribution time;

[0082] If the number cannot be divided evenly, take the integer and add 1 to get the number of round trips;

[0083] The single material distribution time in the reciprocating material distribution is the time for the chute 100 to distribute material once in a single direction in the second sector area 220 .

[0084] Exemplarily, the material distribution time is started after the sealing valve and the throttle valve at the chute tank are opened simultaneously;

[0085] The sealing valve and the throttle valve are electrically connected to the control cabinet.

[0086] Exemplarily, the control module is also used to control the chute 100 to distribute materials in a unidirectional manner in the blast furnace material area at a first speed.

[0087] Exemplarily, the ratio of the second speed to the first speed is less than or equal to 1 / 2.

[0088] Exemplarily, the fan-shaped angle of the second fan-shaped area 220 is greater than or equal to 30° and less than or equal to 180°.

[0089] In a third aspect, the present application proposes an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, any of the above-mentioned blast furnace fan-shaped area charging methods is implemented.

[0090] In a fourth aspect, the present application proposes a storage medium on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned blast furnace sector area charging methods is implemented.

[0091] In some examples, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0092] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0094] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0095] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for distributing material in a fan-shaped area of ​​a blast furnace, characterized in that: include: Determine the range of a second fan-shaped area of ​​the blast furnace charge distribution area, wherein the blast furnace charge area includes a first fan-shaped area and the second fan-shaped area, and a current material thickness of the second fan-shaped area is less than a current material thickness of the first fan-shaped area; Control the chute to distribute materials back and forth in the second sector-shaped area, and the maximum speed of the reciprocating distribution is the second speed; The maximum material distribution speed of the chute in the first fan-shaped area is a first speed, and the first speed is greater than the second speed.

2. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 1, characterized in that: The step of controlling the chute to reciprocate in the second sector area comprises: Divide the second sector-shaped area into a middle area and two edge areas, wherein the middle area is arranged between the two edge areas; The chute is controlled to distribute material to the middle area at the second speed.

3. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 2, characterized in that: When the chute is in the edge area, the material distribution operation of the chute is stopped, the material is in the edge area of ​​the second fan-shaped area due to gravity, and the chute is in the side edge position of the second fan-shaped area due to inertia.

4. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 2, characterized in that: After the material distribution operation of the chute toward one side edge of the second fan-shaped area is completed, the inclination angle of the chute is adjusted, and the material distribution operation of the chute toward the other side edge is performed.

5. The method for distributing charges in a sectoral area of ​​a blast furnace according to claim 1, characterized in that: The total material distribution time of the chute in the second sector-shaped area is the ratio of the total material distribution mass in the second sector-shaped area to the material distribution weight of the chute per unit time.

6. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 5, characterized in that: The number of round trips of the chute corresponding to the second fan-shaped area is the ratio of the total material distribution time to the single material distribution time; If the number cannot be divided evenly, take the integer and add 1 to get the number of round trips; The single material distribution time in the reciprocating material distribution is the time for the chute to distribute material once in a single direction in the second sector-shaped area.

7. The method for distributing charges to a fan-shaped area of ​​a blast furnace according to claim 6, characterized in that: The material distribution time starts from when the sealing valve and the throttle valve at the chute tank are opened simultaneously; The sealing valve and the throttle valve are electrically connected to the control cabinet.

8. The method for distributing charges in a sectoral area of ​​a blast furnace according to claim 1, characterized in that: After the step of controlling the chute to reciprocate in the second sector area, the following steps are included: The chute is controlled to distribute materials in one direction in the blast furnace material area at the first speed.

9. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 1, characterized in that: A ratio of the second speed to the first speed is less than or equal to 1 / 2.

10. The method for distributing charges in a fan-shaped area of ​​a blast furnace according to claim 1, characterized in that: The fan-shaped angle of the second fan-shaped area is greater than or equal to 30° and less than or equal to 180°.

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