Method and device for correcting coefficients of blast furnace burden tank weighing calculation

Abstract

This invention discloses a method and apparatus for correcting coefficients in blast furnace charge tank weighing calculations. By dividing the material into different weight groups and defining different furnace top pressure ranges based on the number of weight groups, the method of corresponding different furnace top pressures to different weight ranges is used to calibrate the charge tank weighing system online, correcting relevant parameters in the blast furnace charge tank weighing system. This solves the problems of drift, nonlinearity, and abrupt changes in the charge tank weighing system caused by various factors during the charging process in the prior art, enabling the charge tank weighing system to be dynamically calibrated online, thus achieving the technical effect of improving the accuracy of charge tank weighing data.

Description

Technical Field

[0001] This invention relates to the field of blast furnace charge tank weighing control technology, and in particular to a method and apparatus for correcting coefficients in blast furnace charge tank weighing calculation. Background Technology

[0002] The calibration methods for large material tank weighing systems mainly include material substitution, material transfer, weightless calibration, and simulator calibration.

[0003] Existing calibration methods are suitable for calibration scenarios where the tank is stationary, but they cannot solve problems such as drift, nonlinearity, and sudden changes in the tank weighing system caused by various factors during the feeding process. Summary of the Invention

[0004] This invention provides a coefficient correction method and apparatus for blast furnace hopper weighing calculation, which solves the problems of drift, nonlinearity and sudden change in the hopper weighing system caused by various factors during the feeding process in the prior art.

[0005] According to one aspect of the present invention, a coefficient correction method for calculating the weighing of blast furnace feed hoppers is provided, the coefficient correction method comprising:

[0006] Based on the preset material weight of the preset material type, n material weight groups are divided, where one material weight group corresponds to the material bin of one blast furnace material tank. n≥3, n is an integer, and n is less than or equal to the number of material bins.

[0007] Based on the number of material weight groups, the furnace top pressure of the blast furnace charge is divided into m intervals, and one material weight group corresponds to one furnace top pressure interval, where m = n;

[0008] Obtain the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of the n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure;

[0009] The material in the target material weight group is fed into the blast furnace hopper p times, and the weight of the material in the blast furnace hopper is obtained when the pressure of the hopper reaches the target furnace top pressure after each feeding, where p≥n+2 and p is an integer;

[0010] The target correction coefficient is determined based on the material weight in the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers.

[0011] Optionally, the coefficient correction method further includes:

[0012] After each time material from the target material weight group is put into the blast furnace feed jar, and before the blast furnace feed jar is pressurized, the weight of the unpressurized material in the blast furnace feed jar is obtained.

[0013] The tare weight of the blast furnace hopper is determined based on the weight of the unpressurized material inside the blast furnace hopper.

[0014] Optionally, determining the tare weight of the blast furnace charge based on the weight of the unpressurized material inside the blast furnace charge includes:

[0015] Calculate the average unpressurized weight of p unpressurized materials to determine the tare weight of the blast furnace hopper.

[0016] Optionally, dividing the top pressure of the blast furnace charge into m intervals based on the number of material weight groups includes:

[0017] Based on the number of material weight groups, the furnace top pressure of the blast furnace hopper is divided into m intervals according to a proportionally increasing pattern.

[0018] Optionally, determining the target correction factor based on the material weight in the silo corresponding to the target material weight group and the material weight in p blast furnace treasuries includes:

[0019] The average weight of the material in each of the p blast furnace charge tanks is calculated to obtain the average value of the pressurized material in the blast furnace charge tanks.

[0020] The target correction coefficient is determined based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper.

[0021] Optionally, determining the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace treasury includes:

[0022] The difference between the material weight of the bin corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper is calculated, and the target correction coefficient is determined based on the obtained difference, the target furnace top pressure, and the hopper structural constant.

[0023] Optionally, after obtaining the target correction coefficient, the coefficient correction method further includes:

[0024] The actual material weight of the blast furnace hopper is determined based on the target correction coefficient and the tare weight of the blast furnace hopper.

[0025] According to another aspect of the present invention, a coefficient correction device for blast furnace charge hopper weighing calculation is provided, the coefficient correction device comprising:

[0026] The first division module is used to divide the material into n material weight groups based on the preset material weight of the preset material type, wherein one material weight group corresponds to the material bin of one blast furnace material tank, n≥3, n is an integer, and n is less than or equal to the number of material bins;

[0027] The second division module is used to divide the furnace top pressure of the blast furnace charge into m intervals based on the number of material weight groups, and to set one interval of the furnace top pressure corresponding to one material weight group, where m = n;

[0028] The first acquisition module is used to acquire the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of the n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure;

[0029] The second acquisition module is used to input the material in the target material weight group into the blast furnace hopper p times, and when the pressure of the blast furnace hopper reaches the target furnace top pressure after each input of material, acquire the weight of the material in the blast furnace hopper, where p≥n+2, and p is an integer;

[0030] The coefficient determination module is used to determine the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers.

[0031] Optionally, the coefficient correction device further includes:

[0032] The second acquisition module is used to acquire the weight of the unpressurized material in the blast furnace hopper after each time the material in the target material weight group is put into the blast furnace hopper and the blast furnace hopper is not pressurized.

[0033] The tare weight determination module is used to determine the tare weight of the blast furnace hopper based on the weight of the unpressurized material inside the blast furnace hopper.

[0034] According to another aspect of the present invention, a blast furnace charge system is provided, which performs the coefficient correction method for blast furnace charge weighing calculation as described in any embodiment of the present invention.

[0035] This invention discloses a method and apparatus for coefficient correction in blast furnace charge tank weighing calculation. The method includes: dividing n material weight groups based on the preset material weight of a preset material type; dividing the furnace top pressure of the blast furnace charge tank into m intervals based on the number of material weight groups, and setting one material weight group to correspond to one furnace top pressure interval; obtaining the material weight of the silo corresponding to the target material weight group; feeding the material in the target material weight group into the blast furnace charge tank p times, and obtaining the material weight in the blast furnace charge tank when the charge tank pressure reaches the target furnace top pressure after each feeding; and determining a target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the material weights in the p blast furnace charge tanks. This application divides the material into different weight groups and then divides the furnace top pressure range according to the number of weight groups. It uses a method of corresponding different furnace top pressures to calibrate the blast furnace hopper weighing system online, corrects the relevant parameters in the blast furnace hopper weighing system, and solves the problems of drift, nonlinearity, and sudden changes in the hopper weighing system caused by various factors during the charging process in the prior art. This allows the hopper weighing system to be dynamically calibrated online, achieving the technical effect of improving the accuracy of hopper weighing data.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of a coefficient correction method for calculating the weighing of blast furnace feed hoppers, provided in Embodiment 1 of the present invention.

[0039] Figure 2 This is a flowchart of a coefficient correction method for calculating the weighing of blast furnace feed hoppers, provided in Embodiment 2 of the present invention.

[0040] Figure 3 This is a schematic diagram of a coefficient correction device for blast furnace charge hopper weighing calculation provided in Embodiment 3 of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Example 1

[0044] Figure 1 This is a flowchart of a coefficient correction method for blast furnace charge hopper weighing calculation provided in Embodiment 1 of the present invention. This embodiment is applicable to situations where blast furnace charge hopper weighing calculations are performed online. The method can be executed by a coefficient correction device for blast furnace charge hopper weighing calculation. This device can be implemented in hardware and / or software and can be configured in any electronic device with network communication capabilities. See also... Figure 1 The method includes:

[0045] S110. Divide the material into n weight groups based on the preset weight of the preset material type. Each weight group corresponds to a hopper in a blast furnace feed hopper, where n ≥ 3, n is an integer, and n is less than or equal to the number of hoppers.

[0046] The preset material types include at least one of the following: sintered ore, pellets, lump ore, coke, pulverized coal, and flux ore; the preset material weights can be manually set according to production needs; a material weight group can be specifically understood as a weight group composed of multiple materials with the same material type and material ratio but different material weights.

[0047] Specifically, before feeding, the types of materials to be fed, their proportions, and their weights are pre-set according to production needs. The first division module divides the pre-set materials into n material weight groups. Each material weight group corresponds to a hopper in a blast furnace feed hopper. During production, the materials in each hopper are fed into the blast furnace feed hopper as needed, thus realizing the feeding process. For example, the first division module can divide the pre-set materials into 5 material weight groups.

[0048] S120. Based on the number of material weight groups, the furnace top pressure of the blast furnace charge is divided into m intervals, and one material weight group corresponds to one furnace top pressure interval, where m = n.

[0049] Specifically, the second division module divides the furnace top pressure of the blast furnace charge into multiple pressure intervals based on the number of material weight groups. Each material weight group corresponds to a furnace top pressure interval. The purpose of dividing the intervals is to enable more accurate measurement of material weight in different pressure intervals.

[0050] For example, under normal production conditions, the top pressure inside the blast furnace is 150-250 kPa. Therefore, when the number of material weight groups n = 5, the top pressure of the blast furnace charge can be divided into 5 intervals. The lower limit calibration points of these five intervals are P1 (150 kPa), P2 (175 kPa), P3 (200 kPa), P4 (225 kPa), and P5 (250 kPa).

[0051] S130. Obtain the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure.

[0052] Specifically, after dividing the furnace top pressure into intervals based on the number of material weight groups, each material weight group needs to implement the process of steps S130-S150. For ease of description, the material weight group currently executing steps S130-S150 is set as the target material weight group, and the furnace top pressure of its corresponding interval is the target furnace top pressure.

[0053] For example, the minimum weight group of materials can be a group of materials used in small quantities in blast furnace charge, such as pulverized coal or flux ore. When the target material weight group is the minimum material weight group, the range of the furnace top pressure corresponding to this material weight group is less than the first lower limit of the blast furnace top pressure. Assuming the pressure calibration point of the minimum material weight group is P1, and the lower limit of the blast furnace top pressure is 150 kPa, the material weight W1 of the silo corresponding to the target material weight group is obtained through the first acquisition module.

[0054] When the target material weight group is the second material weight group, the range of the furnace top pressure corresponding to this material weight group is less than the second lower limit of the blast furnace top pressure. Assuming the pressure calibration point of the second material weight group is P2, and the lower limit of the blast furnace top pressure is 175 kPa, the material weight W2 of the silo corresponding to the target material weight group is obtained through the first acquisition module.

[0055] When the target material weight group is the third material weight group, the range of the furnace top pressure corresponding to this material weight group is less than the third lower limit of the blast furnace top pressure. Assuming the pressure calibration point of the third material weight group is P3, and the lower limit of the blast furnace top pressure is 200 kPa, the material weight W3 of the silo corresponding to the target material weight group is obtained through the first acquisition module.

[0056] When the target material weight group is the fourth material weight group, the range of the furnace top pressure corresponding to this material weight group is less than the fourth lower limit value of the blast furnace top pressure. Assuming the pressure calibration point of the fourth material weight group is P4, and the lower limit value of the blast furnace top pressure is 225 kPa, the material weight W4 of the silo corresponding to the target material weight group is obtained through the first acquisition module.

[0057] When the target material weight group is the fifth material weight group, the range of the furnace top pressure corresponding to this material weight group is less than the fifth lower limit value of the blast furnace top pressure. Assuming the pressure calibration point of the fifth material weight group is P5, and the lower limit value of the blast furnace top pressure is taken as 250 kPa, the material weight W5 of the silo corresponding to the target material weight group is obtained through the first acquisition module.

[0058] S140. Input the material in the target material weight group into the blast furnace feed hopper p times, and when the feed hopper pressure reaches the target furnace top pressure after each input of material, obtain the weight of the material in the blast furnace feed hopper, where p≥n+2, and p is an integer.

[0059] Specifically, the material in the silo corresponding to the target material weight group is put into the blast furnace charging tank. After the charging tank is filled, the upper sealing valve is closed and the charging tank begins to pressurize. When the lower limit of the blast furnace top pressure reaches the pressure calibration point P1 of the target pressure range corresponding to the target material weight group, the weight of the material in the charging tank is read through the second acquisition module. The above operation is repeated p times to obtain p material weight values. In order to ensure the accuracy of the calculation, the value of p is set to be greater than or equal to n+2.

[0060] For example, taking the target material weight group as the minimum material weight group, when the silo corresponding to the minimum material weight group finishes loading the blast furnace charge, the upper sealing valve of the blast furnace charge closes, and the blast furnace charge begins to pressurize. When the pressure value inside the blast furnace charge reaches the pressure calibration point P1 of the target pressure range, the material weight M11 inside the blast furnace charge is read. The process of loading the silo corresponding to the minimum material weight group into the blast furnace charge is repeated. After the next blast furnace charge is completed, the upper sealing valve of the blast furnace charge closes again, and the blast furnace charge pressurizes. When the pressure value inside the blast furnace charge reaches the pressure calibration point P1 again, the material weight M12 inside the blast furnace charge is read again. The above operation is repeated p times, and finally M11, M12, M13, M14, ..., M1 p That is, to obtain the weight of the material in p blast furnace hoppers. When n = 5, p = 7.

[0061] Taking the target material weight group as the second material weight group as an example, when the silo corresponding to the second material weight group finishes loading the blast furnace charge, the upper sealing valve of the blast furnace charge closes, and the blast furnace charge begins to pressurize. When the pressure value inside the blast furnace charge reaches the pressure calibration point P2 of the target pressure range, the material weight M21 inside the blast furnace charge is read. The process of loading the silo corresponding to the second material weight group into the blast furnace charge is repeated. After the next blast furnace charge is completed, the upper sealing valve of the blast furnace charge closes again, and the blast furnace charge pressurizes. When the pressure value inside the blast furnace charge reaches the pressure calibration point P2 again, the material weight M22 inside the blast furnace charge is read again. The above operation is repeated p times, and finally M21, M22, M23, M24, ..., M2 p That is, to obtain the weight of the material in p blast furnace hoppers. When n = 5, p = 7.

[0062] Taking the third material weight group as an example, when the silo corresponding to the third material weight group finishes loading the blast furnace charge, the upper sealing valve of the blast furnace charge closes, and the blast furnace charge begins to pressurize. When the pressure value inside the blast furnace charge reaches the pressure calibration point P3 of the target pressure range, the material weight M31 inside the blast furnace charge is read. The process of loading the silo corresponding to the third material weight group into the blast furnace charge is repeated. After the next blast furnace charge is completed, the upper sealing valve of the blast furnace charge closes again, and the blast furnace charge pressurizes. When the pressure value inside the blast furnace charge reaches the pressure calibration point P3 again, the material weight M32 inside the blast furnace charge is read again. The above operation is repeated p times, and finally M31, M32, M33, M34, ..., M3 p That is, to obtain the weight of the material in p blast furnace hoppers. When n = 5, p = 7.

[0063] Taking the fourth material weight group as an example, when the silo corresponding to the fourth material weight group finishes loading the blast furnace charge, the upper sealing valve of the blast furnace charge closes, and the blast furnace charge begins to pressurize. When the pressure value inside the blast furnace charge reaches the pressure calibration point P4 of the target pressure range, the material weight M41 inside the blast furnace charge is read. The process of loading the silo corresponding to the fourth material weight group into the blast furnace charge is repeated. After the next blast furnace charge is completed, the upper sealing valve of the blast furnace charge closes again, and the blast furnace charge pressurizes. When the pressure value inside the blast furnace charge reaches the pressure calibration point P4 again, the material weight M42 inside the blast furnace charge is read again. The above operation is repeated p times, and finally M41, M42, M43, M44, ..., M4 p That is, to obtain the weight of the material in p blast furnace hoppers. When n = 5, p = 7.

[0064] Taking the fifth material weight group as an example, when the silo corresponding to the fifth material weight group finishes loading the blast furnace charge, the upper sealing valve of the blast furnace charge closes, and the blast furnace charge begins to pressurize. When the pressure value inside the blast furnace charge reaches the pressure calibration point P5 of the target pressure range, the material weight M51 inside the blast furnace charge is read. The process of loading the silo corresponding to the fifth material weight group into the blast furnace charge is repeated. After the next loading of the blast furnace charge is completed, the upper sealing valve of the blast furnace charge closes again, and the blast furnace charge pressurizes. When the pressure value inside the blast furnace charge reaches the pressure calibration point P5 again, the material weight M52 inside the blast furnace charge is read again. The above operation is repeated p times, and finally M51, M52, M53, M54, ..., M5 p That is, to obtain the weight of the material in p blast furnace hoppers. When n = 5, p = 7.

[0065] S150. Determine the target correction coefficient based on the material weight in the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers.

[0066] Specifically, firstly, the average weight of the material in each of the p blast furnace hoppers is calculated. Then, the target correction factor is calculated based on the material weight of the hopper corresponding to the target material weight group, the average weight, the target furnace top pressure, and other parameters. See the following formula:

[0067] Ki = (Wi - Mi) / ηpi, where Ki is the target correction coefficient under the target furnace top pressure, Wi is the material weight of the silo corresponding to the target material weight group, Pi is the target furnace top pressure corresponding to the target material weight group, and Mi is the average value under the target furnace top pressure. We obtain that η is the structural constant of the tank, i is the number of times the material weight is obtained, and i≤p.

[0068] This application divides the material into different weight groups and then divides the furnace top pressure range according to the number of weight groups. It uses a method of corresponding different furnace top pressures to calibrate the blast furnace hopper weighing system online, corrects the relevant parameters in the blast furnace hopper weighing system, and solves the problems of drift, nonlinearity, and sudden changes in the hopper weighing system caused by various factors during the charging process in the prior art. This allows the hopper weighing system to be dynamically calibrated online, achieving the technical effect of improving the accuracy of hopper weighing data.

[0069] Example 2

[0070] Figure 2 This is a flowchart illustrating a coefficient correction method for blast furnace charge hopper weighing calculation according to Embodiment 2 of the present invention. This embodiment further refines the aforementioned embodiments based on the previous ones. See also... Figure 2 The method includes:

[0071] S210. Divide the material weights into n groups based on the preset material weights of the preset material types.

[0072] S220. Based on the number of material weight groups, the furnace top pressure of the blast furnace charge is divided into m intervals, and one material weight group corresponds to one furnace top pressure interval.

[0073] S230: Obtain the material weight of the silo corresponding to the target material weight group.

[0074] S240. After each time the material in the target material weight group is put into the blast furnace feed hopper, and before the blast furnace feed hopper is pressurized, obtain the weight of the unpressurized material in the blast furnace feed hopper.

[0075] For example, when the hopper finishes feeding the blast furnace charge, the lower sealing valve of the blast furnace charge closes. After the pressure relief valve of the blast furnace charge opens but before the upper sealing valve opens, the weight value N1 of the blast furnace charge is read. This weight value N1 is the weight of the unpressurized material in the blast furnace charge. The feeding action from the hopper to the blast furnace charge is performed again. When the feeding is completed, the lower sealing valve of the blast furnace charge closes. Then, after the pressure relief valve opens but before the upper sealing valve opens, the weight value N2 of the blast furnace charge is read again. This operation is repeated p times, finally obtaining N1, N2, N3, N4, ..., N p That is, we get the weight of p unpressurized materials. When n=5, p=7.

[0076] S250. Determine the tare weight of the blast furnace hopper based on the weight of the unpressurized material inside the blast furnace hopper.

[0077] Specifically, the average unpressurized weight is calculated based on the p unpressurized material weights read, and the corrected tare weight of the blast furnace feed hopper is determined based on the average unpressurized weight.

[0078] Optionally, S250, determining the tare weight of the blast furnace hopper based on the weight of the unpressurized material in the blast furnace hopper specifically includes: calculating the average unpressurized weight value of p unpressurized materials to determine the tare weight of the blast furnace hopper.

[0079] Specifically, the average unpressurized weight value is calculated using the following formula. Where N is the tare weight of the tank, i is the number of times the weight of the unpressurized material is read, and i≤p.

[0080] Based on the above technical solutions, S120, dividing the top pressure of the blast furnace charge into m intervals based on the number of material weight groups specifically includes: dividing the top pressure of the blast furnace charge into m intervals according to a proportionally increasing rule based on the number of material weight groups.

[0081] For example, under normal production conditions, the top pressure inside the blast furnace is 150-250 kPa. Therefore, when the number of material weight groups n=5, the top pressure of the blast furnace charge can be divided into m=5 intervals according to the law of proportional increase. The lower limit values ​​of these five intervals are P1 (150 kPa), P2 (175 kPa), P3 (200 kPa), P4 (225 kPa) and P5 (250 kPa), respectively. It can be seen that the increase ratio of each interval is 25 kPa.

[0082] Based on the above technical solutions, S150, determining the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers specifically includes the following steps:

[0083] S1, calculate the average weight of the material in each of the p blast furnace charge tanks to obtain the average value of the pressurized material in the blast furnace charge tanks.

[0084] Specifically, the average value of the pressurized material is calculated using the following formula: Where Mi is the average value of the pressurized material in the blast furnace feed hopper, i is the number of times the material weight is measured, and i≤p.

[0085] S2, determine the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper.

[0086] Optionally, S2, determining the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace treasury includes: subtracting the material weight of the silo corresponding to the target material weight group from the average value of the pressurized material in the blast furnace treasury, and determining the target correction coefficient based on the obtained difference, the target furnace top pressure, and the treasury structural constant.

[0087] Specifically, the target correction coefficient Ki = (Wi - Mi) / ηPi is calculated using the following formula, where Ki is the target correction coefficient under the target furnace top pressure, Wi is the material weight of the silo corresponding to the target material weight group, Mi is the average value of the pressurized material in the blast furnace hopper under the target furnace top pressure corresponding to the target material weight group, Pi is the target furnace top pressure corresponding to the target material weight group, and η is the structural constant of the blast furnace hopper.

[0088] Optionally, in S150, after obtaining the target correction coefficient, the coefficient correction method further includes: determining the actual material weight of the blast furnace hopper based on the target correction coefficient and the tare weight of the blast furnace hopper.

[0089] For example, when the target material weight group is the smallest material weight group, for blast furnace charge hoppers with furnace top pressure ≤ P1, W = W 测 The actual material weight in the blast furnace charge hopper is calculated using +ηP1K1, where W is the material weight in the blast furnace charge hopper, and K1 is the target correction coefficient when the target material weight group is the minimum material weight group. 测 W represents the actual material weight in the blast furnace charge bin, η is the structural constant of the blast furnace charge bin, and P1 is the target furnace top pressure when the target material weight group is the minimum material weight group. 测 The corrected tare weight of the hopper is used for calculation. The specific calculation formula is W = W 总 +ηPK-N, W 测 =W 总 -N, where W is the weight of the material in the blast furnace hopper, W 总 η is the total weight of the blast furnace feed hopper, η is the structural constant of the blast furnace feed hopper, P is the target furnace top pressure, K is the target correction coefficient, and N is the tare weight of the blast furnace feed hopper.

[0090] When the target material weight group is the second material weight group, for the blast furnace charge hopper with furnace top pressure P1 < P ≤ P2, W = W is adopted. 测 The actual material weight in the blast furnace charge hopper is calculated using +ηP2K2, where W is the material weight in the blast furnace charge hopper, and K2 is the target correction coefficient when the target material weight group is the second material weight group. 测 W represents the actual material weight in the blast furnace charge bin, η is the structural constant of the blast furnace charge bin, and P2 is the target furnace top pressure when the target material weight group is the second material weight group. 测 The corrected tare weight of the hopper is used for calculation. The specific calculation formula is W = W 总 +ηPK-N, W 测 =W 总 -N, where W is the weight of the material in the blast furnace hopper, W_total is the total weight of the blast furnace hopper, η is the structural constant of the blast furnace hopper, P is the target furnace top pressure, K is the target correction coefficient, and N is the tare weight of the blast furnace hopper.

[0091] When the target material weight group is the third material weight group, for the blast furnace charge hopper with a top pressure P2 < P ≤ P3, W = W is adopted. 测 The actual material weight in the blast furnace charge hopper is calculated using +ηP3K3, where W is the material weight in the blast furnace charge hopper, and K3 is the target correction factor when the target material weight group is the third material weight group. 测 W represents the actual material weight in the blast furnace charge bin, η is the structural constant of the blast furnace charge bin, and P3 is the target furnace top pressure when the target material weight group is the third material weight group. 测 The corrected tare weight of the hopper is used for calculation. The specific calculation formula is W = W 总 +ηPK-N, W 测 =W 总 -N, where W is the weight of the material in the blast furnace hopper, W_total is the total weight of the blast furnace hopper, η is the structural constant of the blast furnace hopper, P is the target furnace top pressure, K is the target correction coefficient, and N is the tare weight of the blast furnace hopper.

[0092] When the target material weight group is the fourth material weight group, for the blast furnace charge hopper with a top pressure P3 < P ≤ P4, W = W 测 The actual material weight in the blast furnace charge hopper is calculated using +ηP4K4, where W is the material weight in the blast furnace charge hopper, and K4 is the target correction factor when the target material weight group is the fourth material weight group. 测 W represents the actual material weight in the blast furnace charge bin, η is the structural constant of the blast furnace charge bin, and P2 is the target furnace top pressure when the target material weight group is the fourth material weight group. 测 The corrected tare weight of the hopper is used for calculation. The specific calculation formula is W = W 总 +ηPK-N, W 测 =W 总 -N, where W is the weight of the material in the blast furnace hopper, W_total is the total weight of the blast furnace hopper, η is the structural constant of the blast furnace hopper, P is the target furnace top pressure, K is the target correction coefficient, and N is the tare weight of the blast furnace hopper.

[0093] When the target material weight group is the fifth material weight group, for the blast furnace charge hopper with a top pressure P > P4, W = W is adopted. 测 The actual material weight in the blast furnace charge hopper is calculated using +ηP5K5, where W is the material weight in the blast furnace charge hopper, and K5 is the target correction factor when the target material weight group is the fifth material weight group. 测 W represents the actual material weight in the blast furnace charge bin, η is the structural constant of the blast furnace charge bin, and P5 is the target furnace top pressure when the target material weight group is the fifth material weight group. 测 The corrected tare weight of the hopper is used for calculation. The specific calculation formula is W = W总 +ηPK-N, W 测 =W 总 -N, where W is the weight of the material in the blast furnace hopper, W_total is the total weight of the blast furnace hopper, η is the structural constant of the blast furnace hopper, P is the target furnace top pressure, K is the target correction coefficient, and N is the tare weight of the blast furnace hopper.

[0094] This application divides the material into different weight groups and then divides the furnace top pressure range according to the number of weight groups. It uses a method of corresponding different furnace top pressures to calibrate the blast furnace hopper weighing system online, corrects the relevant parameters in the blast furnace hopper weighing system, and solves the problems of drift, nonlinearity, and sudden changes in the hopper weighing system caused by various factors during the charging process in the prior art. This allows the hopper weighing system to be dynamically calibrated online, achieving the technical effect of improving the accuracy of hopper weighing data.

[0095] Example 3

[0096] Figure 3 This is a schematic diagram of a coefficient correction device for blast furnace charge hopper weighing calculation provided in Embodiment 3 of the present invention. The coefficient correction device includes: a first division module 310, a second division module 320, a first acquisition module 330, a second acquisition module 340, and a coefficient determination module 350.

[0097] The first division module 310 is used to divide n material weight groups based on the preset material weight of the preset material type. Each material weight group corresponds to a hopper in a blast furnace feed hopper. n≥3, n is an integer, and n is less than or equal to the number of hoppers.

[0098] The second division module 320 is used to divide the furnace top pressure of the blast furnace charge into m intervals based on the number of material weight groups, and to set one interval of furnace top pressure corresponding to one material weight group, where m = n;

[0099] The first acquisition module 330 is used to acquire the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure;

[0100] The second acquisition module 340 is used to input the material in the target material weight group into the blast furnace feed hopper p times, and when the feed hopper pressure of the blast furnace feed hopper reaches the target furnace top pressure after each input of material, the weight of the material in the blast furnace feed hopper is acquired, where p≥n+2, and p is an integer;

[0101] The coefficient determination module 350 is used to determine the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers.

[0102] Optionally, the coefficient correction device also includes:

[0103] The second acquisition module is also used to acquire the weight of the unpressurized material in the blast furnace hopper after each time the material in the target material weight group is put into the blast furnace hopper and the blast furnace hopper is not pressurized.

[0104] The tare weight determination module is used to determine the tare weight of the blast furnace hopper based on the weight of the unpressurized material inside the blast furnace hopper.

[0105] Optionally, the tare weight determination module is specifically used for:

[0106] Calculate the average unpressurized weight of p unpressurized materials to determine the tare weight of the blast furnace hopper.

[0107] Optionally, the second partitioning module 320 is specifically used for:

[0108] Based on the number of material weight groups, the furnace top pressure of the blast furnace charge is divided into m intervals according to a proportionally increasing rule.

[0109] Optionally, the coefficient determination module 350 includes:

[0110] The mean calculation submodule is used to calculate the average weight of the material in p blast furnace charge tanks to obtain the average value of the pressurized material in the blast furnace charge tanks.

[0111] The coefficient determination submodule is used to determine the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper.

[0112] Optionally, the coefficient determination submodule is also used for:

[0113] The difference between the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper is calculated, and the target correction coefficient is determined based on the obtained difference, the target furnace top pressure, and the hopper structural constant.

[0114] Optionally, the coefficient correction device also includes:

[0115] The weight determination module is used to determine the actual material weight of the blast furnace hopper based on the target correction factor and the tare weight of the blast furnace hopper.

[0116] This invention also provides a blast furnace feeder system, which implements the coefficient correction method for blast furnace feeder weighing calculation provided in any embodiment of this invention.

[0117] The coefficient correction device for blast furnace feed hopper weighing calculation provided in this embodiment of the invention can execute the coefficient correction method for blast furnace feed hopper weighing calculation provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0118] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0119] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for correcting coefficients in blast furnace charge hopper weighing calculations, characterized in that, The coefficient correction method includes: Based on the preset material weight of the preset material type, n material weight groups are divided, where one material weight group corresponds to the material bin of one blast furnace material tank. n≥3, n is an integer, and n is less than or equal to the number of material bins. Based on the number of material weight groups, the furnace top pressure of the blast furnace charge is divided into m intervals, and one material weight group corresponds to one furnace top pressure interval, where m=n; Obtain the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of the n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure; The material in the target material weight group is fed into the blast furnace hopper p times, and the weight of the material in the blast furnace hopper is obtained when the pressure of the hopper reaches the target furnace top pressure after each feeding, where p≥n+2 and p is an integer; The target correction coefficient is determined based on the material weight in the silo corresponding to the target material weight group and the material weight in p blast furnace treasuries; After each time material from the target material weight group is put into the blast furnace feed jar, and before the blast furnace feed jar is pressurized, the weight of the unpressurized material in the blast furnace feed jar is obtained. The tare weight of the blast furnace charge is determined based on the weight of the unpressurized material inside the blast furnace charge. Determining the tare weight of the blast furnace charge based on the weight of the unpressurized material inside the blast furnace charge includes: Calculate the average unpressurized weight of p unpressurized materials to determine the tare weight of the blast furnace hopper; Based on the number of material weight groups, the top pressure of the blast furnace charge is divided into m intervals, including: Based on the number of material weight groups, the top pressure of the blast furnace feed hopper is divided into m intervals according to a proportionally increasing rule. The target correction factor is determined based on the material weight in the silo corresponding to the target material weight group and the material weight in p blast furnace treasuries, including: The average weight of the material in each of the p blast furnace charge tanks is calculated to obtain the average value of the pressurized material in the blast furnace charge tanks. The target correction coefficient is determined based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace treasury. The target correction factor is determined based on the material weight of the silo corresponding to the target material weight group and the average value of the pressurized material in the blast furnace treasury, including: The difference between the material weight of the bin corresponding to the target material weight group and the average value of the pressurized material in the blast furnace hopper is calculated, and the target correction coefficient is determined based on the obtained difference, the target furnace top pressure, and the hopper structural constant.

2. The method according to claim 1, characterized in that, After obtaining the target correction coefficient, the coefficient correction method further includes: The actual material weight of the blast furnace hopper is determined based on the target correction coefficient and the tare weight of the blast furnace hopper.

3. A coefficient correction device for blast furnace charge hopper weighing calculation, characterized in that, A coefficient correction method for performing blast furnace hopper weighing calculations as described in any one of claims 1-2, wherein the coefficient correction device for blast furnace hopper weighing calculations comprises: The first division module is used to divide the material into n material weight groups based on the preset material weight of the preset material type, wherein one material weight group corresponds to the material bin of one blast furnace material tank, n≥3, n is an integer, and n is less than or equal to the number of material bins; The second division module is used to divide the furnace top pressure of the blast furnace charge into m intervals based on the number of material weight groups, and to set one interval of the furnace top pressure corresponding to one material weight group, where m=n; The first acquisition module is used to acquire the material weight of the silo corresponding to the target material weight group, wherein the target material weight group is one of the n material weight groups, and the furnace top pressure of the interval corresponding to the target material weight group is the target furnace top pressure; The second acquisition module is used to input the material in the target material weight group into the blast furnace hopper p times, and when the pressure of the blast furnace hopper reaches the target furnace top pressure after each input of material, acquire the weight of the material in the blast furnace hopper, where p≥n+2, and p is an integer; The coefficient determination module is used to determine the target correction coefficient based on the material weight of the silo corresponding to the target material weight group and the material weight in p blast furnace hoppers.

4. The apparatus according to claim 3, characterized in that, The coefficient correction device further includes: The second acquisition module is used to acquire the weight of the unpressurized material in the blast furnace hopper after each time the material in the target material weight group is put into the blast furnace hopper and the blast furnace hopper is not pressurized. The tare weight determination module is used to determine the tare weight of the blast furnace hopper based on the weight of the unpressurized material inside the blast furnace hopper.

5. A blast furnace charge system, characterized in that, The blast furnace feed hopper system implements the coefficient correction method for the blast furnace feed hopper weighing calculation as described in any one of claims 1-2.

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