Method and device for determining the performance of a blast furnace

Abstract

The application discloses a method and device for determining the smelting performance of a blast furnace, which comprises determining the correction value of the change of the furnace top pressure and the correction value of the change of the temperature after each batch of furnace charge is put into the blast furnace; determining the change value of the furnace top gas energy of each batch of furnace charge according to the correction value of the change of the furnace top pressure and the correction value of the change of the temperature of each batch of furnace charge; determining the average value of the change value of the gas energy of the N batches of furnace charge; determining the deviation value of the gas energy according to the average value of the change value of the gas energy and a first preset value; determining the gas utilization index under the total amount of the N batches of furnace charge; determining the deviation value of the reducibility index according to the gas utilization index and a second preset value; and determining the smelting performance index of the blast furnace according to the deviation value of the gas energy and the deviation value of the reducibility index. The application creates conditions, lays a foundation and provides technical reference for optimizing the combination of the furnace charge, and has guiding significance for the selection and amount of the furnace charge.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of blast furnace smelting, and in particular to a method and device for determining the performance of blast furnace smelting. BACKGROUND

[0002] The furnace burden used by the blast furnace mainly includes sintered ore, ball ore, raw ore, silica, dolomite, coke and coal powder. With the shortage of high-iron-content ore resources, domestic blast furnaces and even blast furnaces around the world have begun to use economic furnace burden. The characteristics of economic furnace burden are low ore grade and a large variety of ores, and the multiple furnace burdens entering the blast furnace smelting are the comprehensive furnace burden of the blast furnace. Before each type of furnace burden is used, the furnace burden is detected for the main chemical composition and the main physical performance index, and the key quality index data of the furnace burden obtained through the detection are used to evaluate the quality index of the single type of raw material. The composition and physical performance index of the raw material meet the requirements of the blast furnace smelting, and the raw material quality index is preliminarily determined to be qualified.

[0003] At present, multiple furnace burdens are randomly matched and used. The quality of each furnace burden (including the main chemical composition, the main physical performance and the main metallurgical performance) is qualified, but after being combined and entering the blast furnace smelting, abnormal furnace conditions appear after the reaction in the blast furnace, which affects the smooth operation of the blast furnace. Moreover, the actual reaction situation of the multiple furnace burden combination in the blast furnace smelting is difficult to correspond to the pre-evaluation. After the blast furnace uses the multiple furnace burden, the furnace condition fluctuates, the index deteriorates, the evaluation of the comprehensive furnace burden of the blast furnace is distorted, there is no guiding significance for how to select the multiple furnace burden, and the smelting performance of the furnace burden loses reference significance. SUMMARY

[0004] The present application provides a method and device for determining the performance of blast furnace smelting, which creates conditions, lays a foundation and provides technical reference for optimizing the combination of furnace burden, and has guiding significance for the selection and amount of furnace burden.

[0005] According to one aspect of the present application, the present application provides a method for determining the performance of blast furnace smelting, comprising:

[0006] determining the change correction value of the furnace top pressure and the change correction value of the temperature after each batch of furnace burden is put into the blast furnace;

[0007] determining the change value of the furnace top gas energy after each batch of furnace burden is put into the blast furnace according to the change correction value of the furnace top pressure and the change correction value of the temperature after each batch of furnace burden is put into the blast furnace;

[0008] determining the average value of the change value of the furnace top gas energy after N batches of furnace burden are put into the blast furnace according to the change value of the furnace top gas energy after each batch of furnace burden is put into the blast furnace;

[0009] determining the deviation value of the furnace top gas energy according to the average value of the change value of the furnace top gas energy and a first preset value;

[0010] obtaining total quantity of N batches of furnace burden;

[0011] determining a coal gas utilization rate index under the total quantity of N batches of furnace burden;

[0012] determining a reducibility index deviation value according to the coal gas utilization rate index and a second preset value;

[0013] determining a blast furnace smelting performance index according to the top gas energy deviation value and the reducibility index deviation value;

[0014] wherein the first preset value is a set top gas energy change value, the second preset value is a set coal gas utilization rate index, the types of each batch of furnace burden in the N batches of furnace burden are the same, and N is greater than or equal to 1.

[0015] Optionally, determining the top pressure change correction value and the top temperature change correction value of each batch of furnace burden after being put into the blast furnace comprises:

[0016] obtaining a top actual pressure value of each batch of furnace burden after being put into the blast furnace;

[0017] determining a top pressure change value of each batch of furnace burden after being put into the blast furnace according to the top actual pressure value of each batch of furnace burden after being put into the blast furnace and a corresponding third preset value before each batch of furnace burden is put into the blast furnace;

[0018] determining a top pressure change correction value of each batch of furnace burden after being put into the blast furnace according to the weight deviation of each batch of furnace burden and the top pressure change value of each batch of furnace burden after being put into the blast furnace;

[0019] obtaining a top actual temperature value of each batch of furnace burden after being put into the blast furnace;

[0020] determining a top temperature change value of each batch of furnace burden after being put into the blast furnace according to the top actual temperature value of each batch of furnace burden after being put into the blast furnace and a corresponding fourth preset value before each batch of furnace burden is put into the blast furnace;

[0021] determining a top temperature change correction value of each batch of furnace burden after being put into the blast furnace according to the weight deviation of each batch of furnace burden and the top temperature change value of each batch of furnace burden after being put into the blast furnace;

[0022] wherein the third preset value is a top pressure value of each batch of furnace burden before being put into the blast furnace, and the fourth preset value is a top temperature value of each batch of furnace burden before being put into the blast furnace.

[0023] Optionally, before determining the top pressure change correction value and the top temperature change correction value of each batch of furnace burden after being put into the blast furnace, the method further comprises:

[0024] obtaining a weight of each batch of furnace burden;

[0025] determining an average weight of the N batches of furnace charges according to the weight of each batch of furnace charges;

[0026] determining a weight deviation of each batch of furnace charges according to the average weight of the N batches of furnace charges and the weight of each batch of furnace charges.

[0027] Optionally, determining the top gas energy deviation value according to the average value of the top gas energy change values and the first preset value comprises:

[0028] the top gas energy deviation value is equal to the difference between the average value of the top gas energy change values and the first preset value divided by the absolute value of the first preset value;

[0029] determining the reduction index deviation value according to the gas utilization rate index and the second preset value comprises:

[0030] the reduction index deviation value is equal to the difference between the gas utilization rate index and the second preset value divided by the absolute value of the second preset value;

[0031] determining the blast furnace smelting performance index according to the top gas energy deviation value and the reduction index deviation value comprises:

[0032] the blast furnace smelting performance index is equal to the sum of the top gas energy deviation value and the reduction index deviation value.

[0033] Optionally, each batch of furnace charges comprises a plurality of furnace charges.

[0034] Optionally, the method for determining the blast furnace smelting performance further comprises:

[0035] storing the blast furnace smelting performance index of the N batches of furnace charges after the N batches of furnace charges are put into the blast furnace to form a database of the blast furnace smelting performance index.

[0036] According to another aspect of the present application, an embodiment of the present application provides a device for determining the blast furnace smelting performance, comprising:

[0037] a correction value determination module configured to determine a pressure change correction value and a temperature change correction value of the top of the blast furnace after each batch of furnace charges among the N batches of furnace charges is put into the blast furnace;

[0038] a gas energy change value determination module configured to determine a top gas energy change value of the blast furnace after each batch of furnace charges is put into the blast furnace according to the pressure change correction value and the temperature change correction value of the top of the blast furnace after each batch of furnace charges is put into the blast furnace;

[0039] an average value of gas energy change value determination module configured to determine an average value of the top gas energy change values of the blast furnace after the N batches of furnace charges are put into the blast furnace according to the top gas energy change values of the blast furnace after each batch of furnace charges among the N batches of furnace charges is put into the blast furnace;

[0040] a gas energy deviation value determination module configured to determine a top gas energy deviation value according to the average value of the top gas energy change values and a first preset value;

[0041] a total quantity of burden obtaining module, configured to obtain a total quantity of N batches of burden;

[0042] a gas utilization rate index determining module, configured to determine a gas utilization rate index under the total quantity of N batches of burden;

[0043] a reducibility index deviation value determining module, configured to determine a reducibility index deviation value according to the gas utilization rate index and a second preset value;

[0044] a blast furnace smelting performance index determining module, configured to determine a blast furnace smelting performance index according to the gas energy deviation value and the reducibility index deviation value.

[0045] Optionally, the correction value determining module comprises a top actual pressure value obtaining unit, a top pressure change value determining unit, a top pressure change correction value determining unit, a top actual temperature value obtaining unit, a top temperature change value determining unit and a top temperature change correction value determining unit;

[0046] the top actual pressure value obtaining unit is configured to obtain a top actual pressure value after each batch of burden is put into the blast furnace;

[0047] the top pressure change value determining unit is configured to determine a top pressure change value after each batch of burden is put into the blast furnace according to the top actual pressure value after each batch of burden is put into the blast furnace and a corresponding third preset value before each batch of burden is put into the blast furnace;

[0048] the top pressure change correction value determining unit is configured to determine a top pressure change correction value after each batch of burden is put into the blast furnace according to the weight deviation of each batch of burden and the top pressure change value after each batch of burden is put into the blast furnace;

[0049] the top actual temperature value obtaining unit is configured to obtain a top actual temperature value after each batch of burden is put into the blast furnace;

[0050] the top temperature change value determining unit is configured to determine a top temperature change value after each batch of burden is put into the blast furnace according to the top actual temperature value after each batch of burden is put into the blast furnace and a corresponding fourth preset value before each batch of burden is put into the blast furnace;

[0051] the top temperature change correction value determining unit is configured to determine a top temperature change correction value after each batch of burden is put into the blast furnace according to the weight deviation of each batch of burden and the top temperature change value after each batch of burden is put into the blast furnace.

[0052] Optionally, the device for determining the blast furnace smelting performance further comprises:

[0053] The furnace charge weight acquisition module is configured to acquire the weight of each batch of furnace charge before determining the pressure change correction value and the temperature change correction value of the furnace top after each batch of furnace charge is put into the blast furnace.

[0054] The furnace charge average weight determination module is configured to determine the average weight of the N batches of furnace charge according to the weight of each batch of furnace charge.

[0055] The furnace charge weight deviation determination module is configured to determine the weight deviation of each batch of furnace charge according to the average weight of the N batches of furnace charge and the weight of each batch of furnace charge.

[0056] Optionally, the blast furnace smelting performance device further comprises:

[0057] The storage module is configured to store the blast furnace smelting performance index after the N batches of furnace charge are put into the blast furnace, thereby forming a database of the blast furnace smelting performance index.

[0058] In the embodiment of the present application, the average value of the furnace top coal gas energy change value after each batch of furnace charge is put into the blast furnace is determined by the furnace top coal gas energy change value after each batch of furnace charge is put into the blast furnace, the internal smelting condition of the blast furnace after the furnace charge is put into the blast furnace can be reflected by the average value of the furnace top coal gas energy change value, the furnace top coal gas energy deviation value is determined according to the average value of the furnace top coal gas energy change value and the first preset value, the influence of the discharging process on the blast furnace smelting can be truly reflected by the furnace top coal gas energy deviation value, the reducibility index deviation value is determined according to the coal gas utilization rate index and the second preset value, the reducibility condition of the furnace charge in the internal smelting of the blast furnace can be truly reflected by the reducibility index deviation value, and the blast furnace smelting performance index is determined according to the coal gas energy deviation value and the reducibility index deviation value. In the present application, the comparative accurate evaluation standard of the furnace charge in the internal smelting of the blast furnace is obtained by tracking and analyzing the internal smelting process of the furnace charge in the blast furnace, which creates conditions, lays a foundation and provides technical reference for optimizing the furnace charge combination, and has guiding significance for the selection and dosage of the furnace charge.

[0059] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0061] Figure 1is a structural schematic diagram of a blast furnace provided by an embodiment of the present application;

[0062] Figure 2 is a flow chart of a method for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0063] Figure 3 is a flow chart of a method for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0064] Figure 4 is a flow chart of a method for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0065] Figure 5 is a flow chart of a method for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0066] Figure 6 is a flow chart of a method for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0067] Figure 7 is a structural schematic diagram of a device for determining smelting performance of a blast furnace provided by an embodiment of the present application;

[0068] Figure 8 is a structural schematic diagram of a correction value determination module provided by an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the art without creative labor should belong to the scope of protection of the present application.

[0070] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0071] Figure 1 is a structural schematic diagram of a blast furnace provided by an embodiment of the present application, referring to Figure 1 The blast furnace comprises a furnace top 1, a lump zone 2, a softening zone 3, a dripping zone 4, a tuyere zone 5 and a hearth zone 6. The furnace charge enters the lump zone 2 from the furnace top 1, and the furnace charge and the coke are distributed in layers in the lump zone 2. The furnace charge enters the interior of the blast furnace for smelting. In the initial stage, the furnace charge is in a solid state. The furnace charge is put into the lump zone 2, and the furnace charge rapidly presses the gas flow generated in the softening zone 3, resulting in a sudden and sharp change in the pressure of the gas flow in the furnace top 1. With the gradual softening of the furnace charge after the reaction of the furnace charge with the coke, in the lump zone 2 (i.e., the coexistence zone of the furnace charge and the gas flow), most of the furnace charge is in a solid state. The furnace charge expands, collides, extrudes and a small amount of the furnace charge softens. The porosity between the furnace charges increases, and the resistance of the furnace charge to the gas flow decreases. In the softening zone 3 (i.e., the coexistence zone of the furnace charge, the gas flow and the liquid slag and molten iron), with the accelerated reaction of the furnace charge, the furnace charge in the softening state mixes with the gas flow to generate a large amount of liquid slag and molten iron. Part of the solid furnace charge, the liquid slag and the molten iron enter the hearth zone 6 from the dripping zone 4. In the hearth zone 6, which is basically a coke and slag-iron mixing zone, the reaction of the furnace charge is basically completed. In the interior of the hearth, a series of chemical reactions such as carburizing and desulfurizing are carried out. In the area below the softening zone 3, the resistance of the blast furnace gas is basically uniformly reduced in gradient.

[0072] In the radial direction of the blast furnace shaft, a pressure detector is installed every four or five meters. According to the pressure detection data of each point of each layer of the circumference of the blast furnace shaft, the position of the sudden change of the pressure of the blast furnace shaft and the position of the sharp decrease of the pressure of the blast furnace shaft are obtained, and the softening zone 3 of the furnace charge in the blast furnace is determined. The judgment basis is that the high-pressure hot blast is blown into the blast furnace from the lower tuyere of the tuyere zone 5. The hot blast pressure rapidly decreases in gradient in the area from the lower tuyere to the softening zone 3 (i.e., the coexistence zone of the solid, liquid and gas). When the hot blast penetrates the softening zone 3 to enter the lump zone 2 (the coexistence zone of the solid furnace charge and the gas), the pressure reduction gradient of the internal hot gas flow rapidly slows down.

[0073] The influence of the furnace charge on the smelting of the blast furnace includes the following three aspects. The first influence is that the furnace charge impacts and presses the gas flow in the interior of the blast furnace when the furnace charge contacts the gas flow at the uppermost end of the interior of the blast furnace during the process of being put into the furnace top. The second influence is that the volume of the furnace charge shrinks and the void changes during the process of the furnace charge descending, which affects the distribution of the gas flow in the interior of the blast furnace. The third influence is that the slag-iron generated by the combustion, reaction and softening of the furnace charge affects the gas flow in the interior of the blast furnace. In the normal production of the blast furnace, after the furnace charge enters the interior of the blast furnace, the furnace charge completely fills the interior of the blast furnace and uniformly descends, which has a small influence on the smelting of the blast furnace. Therefore, the process of the furnace charge being put into the blast furnace and the reduction reaction of the furnace charge have the most direct influence on the smelting of the blast furnace.

[0074] In order to determine the influence of the process of the furnace charge being put into the blast furnace and the reduction reaction of the furnace charge on the smelting performance of the blast furnace, the present application provides the following technical solutions.

[0075] This invention provides a method for determining the smelting performance of a blast furnace. Figure 2 This is a flowchart of a method for determining the blast furnace smelting performance provided in an embodiment of the present invention. See also... Figure 2 The methods for determining the blast furnace smelting performance include:

[0076] S110. Determine the correction values ​​for the top pressure change and temperature change of each batch of furnace charge after it is put into the blast furnace in N batches of furnace charge.

[0077] The correction value for the change in furnace top pressure is represented by ΔP + ΔP × a, where ΔP is the change in furnace top pressure after each batch of furnace charge is placed into the blast furnace, and a is the weight deviation after each batch of furnace charge is placed into the blast furnace. The correction value for the change in temperature is represented by ΔT + ΔT × a, where ΔT is the change in furnace top pressure after each batch of furnace charge is placed into the blast furnace. For example, in N batches of furnace charge, the correction value for the pressure change after the first batch of furnace charge is placed into the blast furnace is ΔP1 + ΔP1 × a, the correction value for the pressure change after the second batch of furnace charge is placed into the blast furnace is ΔP2 + ΔP2 × a, and so on, until the correction value for the pressure change after the Nth batch of furnace charge is ΔP. n +△P n ×a. The correction value for the temperature change after the first batch of furnace charge is put into the blast furnace is △T1 + △T1×a.

[0078] The temperature change correction value after the second batch of furnace charge is put into the blast furnace is △T2 + △T2 × a, until the temperature change correction value after the Nth batch of furnace charge is put into the blast furnace is △T. n +△T n ×a. Each batch of furnace charge includes multiple types of furnace charge. In N batches of furnace charge, the types of furnace charge in each batch are the same, and N is greater than or equal to 1.

[0079] S120. Determine the change value of the top gas energy after each batch of furnace charge is put into the blast furnace based on the correction values ​​of the top pressure change and temperature change after each batch of furnace charge is put into the blast furnace.

[0080] The change in blast furnace top gas energy is determined using correction values ​​for top pressure and temperature changes, denoted by Q. For example, the change in blast furnace top gas energy after the first batch of charge is placed into the blast furnace is Q1 = (a1 × △P1 + △P1) × (a1 × △T1 + △T1), the change in blast furnace top gas energy after the second batch of charge is placed into the blast furnace is Q2 = (a2 × △P2 + △P2) × (a2 × △T2 + △T2), and so on, until the change in blast furnace top gas energy after the Nth batch of charge is placed into the blast furnace is Q1. n =(a n ×△P n +△P n )×(a n ×△T n +△Tn )。

[0081] S130, determining an average value of the top gas energy change values of the N batches of furnace burden after the furnace burden is put into the blast furnace according to the top gas energy change value of each batch of furnace burden after the furnace burden is put into the blast furnace.

[0082] wherein the average value of the top gas energy change values of the N batches of furnace burden after the furnace burden is put into the blast furnace is determined according to the top gas energy change value Q1 of the first batch of furnace burden after the furnace burden is put into the blast furnace, the top gas energy change value Q2 of the second batch of furnace burden after the furnace burden is put into the blast furnace, and the top gas energy change value QN of the Nth batch of furnace burden after the furnace burden is put into the blast furnace. n determining an average value Q of the top gas energy change values of the N batches of furnace burden after the furnace burden is put into the blast furnace 均 = (Q1+Q2+Q3+…QN) / n. n ).

[0083] S140, determining a top gas energy deviation value according to the average value of the top gas energy change value and a first preset value.

[0084] wherein the first preset value is a set top gas energy change value. During the production of the blast furnace, a target interval P0 of the top gas pressure fluctuation, a target interval T0 of the top gas temperature fluctuation, and a set top gas energy change value Q0=T0×T0 are set before and after the discharge of each blast furnace.

[0085] The determination method of the first preset value: in the new blast furnace state, the interval values of the top gas pressure and the top gas temperature of the same type of blast furnace at home and abroad are referred to for determination; after the production of the blast furnace, the average top gas pressure and the average top gas temperature values in the production process of the blast furnace can be used for determination.

[0086] determining a top gas energy deviation value according to the average value Q of the top gas energy change value 均 and the first preset value Q0, that is, an index of the influence on the smelting process of the blast furnace during the discharge of the furnace burden, which is represented by β1. The smaller β1 is, the smaller the influence on the smelting process of the blast furnace during the discharge of the furnace burden is. The larger β1 is, the larger the influence on the smelting process of the blast furnace during the discharge of the furnace burden is.

[0087] S150, obtaining the total amount of the N batches of furnace burden.

[0088] The furnace burden moves from top to bottom in the blast furnace, and the furnace burden starts to be heated and gradually reacts with CO and H2 (a small amount). Starting from the calculation of each batch of furnace burden put into the blast furnace, the height of the descent of each batch of furnace burden is calculated according to the descent speed (i.e., the material speed) of each batch of furnace burden, and finally the total height (i.e., the total amount) of the N batches of furnace burden is determined,

[0089] Referring to Figure 1, or the total amount of N batches of burden is determined by using the material line, the blast furnace wall is engraved with a scale line, that is, the material line, and the discharge port 20 is the zero scale line. When the material surface of each batch of burden reaches the 1.5-meter material line, the burden is discharged. For example, after the first batch of burden is discharged, the material surface reaches the 1.2-meter material line. When the material surface drops to the 1.5-meter material line, the second batch of burden is discharged. As a result, the first batch of burden drops by 0.3 meters. After N batches of burden are continuously discharged, the total drop distance of N batches of burden is obtained. That is, the total amount of N batches of burden is determined.

[0090] Alternatively, according to the specific position of the soft melting zone 3 of the blast furnace, the distance H from the material surface of the burden to the position of the soft melting zone is obtained. When N batches of burden are all discharged into the lump zone 1, when the material surface reaches the position of the soft melting zone 3, that is, the distance H is dropped, the total amount of N batches of burden is determined.

[0091] S160, determine the gas utilization rate index under the total amount of N batches of burden.

[0092] Specifically, the gas utilization rate index under the amount of each batch of burden is obtained. The gas utilization rate index under the total amount of N batches of burden is determined according to the gas utilization rate index under the amount of each batch of burden, which is represented by V1 (that is, the average value of the gas utilization rate index). The gas utilization rate index represents the reduction reaction of the burden in the soft melting zone.

[0093] S170, determine the reduction index deviation value according to the gas utilization rate index and the second preset value.

[0094] Wherein, the second preset value is the set gas utilization rate index, represented by V0, and the reduction index deviation value is represented by g1. The determination method of the second preset value is to refer to the gas utilization rate index value of the same type of blast furnace at home and abroad or the gas utilization rate value of a certain period of blast furnace production process.

[0095] When g1 is closer to zero, it means that the smelting reduction performance deviation of N batches of burden in the blast furnace is smaller. When g1 is larger, it means that the smelting reduction performance deviation of N batches of burden in the blast furnace is larger.

[0096] S180, determine the blast furnace smelting performance index according to the top gas energy deviation value and the reduction index deviation value.

[0097] Specifically, the effect of the burden on the blast furnace top gas flow distribution is initially small when the burden enters the blast furnace, and then the indirect reduction and hot melting of the burden and the like cause the burden to become liquid slag iron during the conversion to liquid, and the performance of the burden on the smelting of the blast furnace gradually decreases after the formation of the liquid slag iron. Therefore, the smelting performance of the burden is evaluated by using the interaction between the burden in the solid state and the gas flow and the reduction reaction in the gas-solid-liquid stage, and a blast furnace smelting performance index is defined as K, K = β1 + g1. The closer the value of K is to zero, the better the smelting performance of the burden on the blast furnace.

[0098] In the embodiment of the present application, the average value of the blast furnace top gas energy change value after N batches of burden are put into the blast furnace is determined by the blast furnace top gas energy change value after each batch of burden is put into the blast furnace, the average value of the blast furnace top gas energy change value after N batches of burden are put into the blast furnace can truly reflect the smelting situation in the blast furnace during the discharging process, the blast furnace top gas energy deviation value is determined according to the average value of the blast furnace top gas energy change value and the first preset value, the blast furnace top gas energy deviation value can truly reflect the influence of the discharging process on the smelting of the blast furnace, the reducibility index deviation value is determined according to the gas utilization rate index and the second preset value, the reducibility index deviation value can truly reflect the reducibility of the burden in the smelting of the blast furnace, and the blast furnace smelting performance index is determined according to the blast furnace top gas energy deviation value and the reducibility index deviation value. In the present application, by tracking and analyzing the smelting process of the burden in the blast furnace, a more accurate evaluation standard for the smelting of the burden in the blast furnace is obtained, which creates conditions, lays a foundation and provides technical reference for optimizing the burden combination, and has guiding significance for the selection and amount of the burden.

[0099] Figure 3 is a flow chart of another method for determining the smelting performance of a blast furnace provided in the embodiment of the present application, and Figure 2 The difference between the method for determining the smelting performance of a blast furnace shown in the embodiment and the method for determining the smelting performance of a blast furnace shown in Figure 3 Optionally, based on the above-mentioned embodiment, the method for determining the smelting performance of a blast furnace comprises the following steps:

[0100] S1101, obtaining the actual pressure value of the blast furnace top after each batch of burden is put into the blast furnace.

[0101] The actual pressure value of the blast furnace top after each batch of burden is put into the blast furnace is represented by P t , and the actual pressure value of the blast furnace top after the first batch of burden is put into the blast furnace is represented by P t1 , the actual pressure value of the blast furnace top after the second batch of burden is put into the blast furnace is represented by P t2 , and the actual pressure value of the blast furnace top after the n-th batch of burden is put into the blast furnace is represented by P tn .

[0102] After each batch of furnace charge is put into the blast furnace, the coal gas flows upward and the furnace charge flows downward in the lump zone (i.e., the zone where the solid furnace charge coexists with the coal gas flow), the coal gas flow penetrates the gaps between the furnace charges to reach the top of the blast furnace and overflow the material surface, and the actual pressure value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace is obtained.

[0103] S1102, determining the change value of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace according to the actual pressure value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace and the corresponding third preset value before each batch of furnace charge is put into the blast furnace.

[0104] The third preset value is the pressure value of the top of the blast furnace before each batch of furnace charge is put into the blast furnace, which is represented by P n , and the change value of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace is represented by △P. n

[0105] Each batch of furnace charge causes the coal gas flow at the top of the blast furnace to be suppressed, and the change value of the top pressure of the blast furnace is The change value of the top pressure of the blast furnace after the first batch of furnace charge is put into the blast furnace is △P1=P1-P t1 , the change value of the top pressure of the blast furnace after the second batch of furnace charge is put into the blast furnace is △P2=P2-P t2 , and the change value of the top pressure of the blast furnace after the nth batch of furnace charge is put into the blast furnace is △Pn=PN-P The greater the change value, the more serious the suppression of the coal gas flow.

[0106] S1103, determining the correction value of the change of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the change value of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace.

[0107] The weight deviation is the difference between the average weight of the N batches of furnace charge and the weight of each batch of furnace charge divided by the average weight of the N batches of furnace charge, which is represented by a, and the weight deviation of the first batch of furnace charge is a1, the weight deviation of the second batch of furnace charge is a2, and the weight deviation of the nth batch of furnace charge is an. n The weight deviation of each batch of furnace charge is used to correct the change value of the pressure after each batch of furnace charge is put into the blast furnace, and the correction value of the change of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace is obtained. The correction value of the change of the top pressure of the blast furnace after each batch of furnace charge is put into the blast furnace can quickly adjust the air pressure in the blast furnace to reduce the adverse effects of the blast furnace smelting process on the smooth operation of the blast furnace and the indicators.

[0108] S1104, obtaining the actual temperature value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace.

[0109] wherein, T tn represents the actual temperature value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace, the actual temperature value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace is obtained, for example, the actual temperature value of the top of the blast furnace after the first batch of furnace charge is put into the blast furnace is T t1 , the actual temperature value of the top of the blast furnace after the second batch of furnace charge is put into the blast furnace is T t2 , and the actual temperature value of the top of the blast furnace after the nth batch of furnace charge is put into the blast furnace is T tn .

[0110] S1105, determining the change value of the temperature of the top of the blast furnace after each batch of furnace charge is put into the blast furnace according to the actual temperature value of the top of the blast furnace after each batch of furnace charge is put into the blast furnace and the fourth preset value corresponding to each batch of furnace charge before the furnace charge is put into the blast furnace.

[0111] wherein, the fourth preset value is the temperature value of the top of the blast furnace before each batch of furnace charge is put into the blast furnace, and T n is used to represent, for example, the temperature value of the top of the blast furnace before the first batch of furnace charge is put into the blast furnace is T1, the temperature value of the top of the blast furnace before the second batch of furnace charge is put into the blast furnace is T2, and the temperature value of the top of the blast furnace before the nth batch of furnace charge is put into the blast furnace is T n .

[0112] The change value of the temperature of the top of the blast furnace is ΔT n = T n -T tn , for example, the change value of the temperature of the top of the blast furnace after the first batch of furnace charge is put into the blast furnace is ΔT1 = T1-T t1 , the change value of the temperature of the top of the blast furnace after the second batch of furnace charge is put into the blast furnace is ΔT2 = T2-T t2 , and the change value of the temperature of the top of the blast furnace after the nth batch of furnace charge is put into the blast furnace is ΔT n = T n -T tn . The blast furnace top gas pressure and temperature are synchronous, the temperature is generated by the gas flow overflowing from the top of the blast furnace, and the greater the change value of the temperature of the top of the blast furnace, the more serious the gas flow is suppressed.

[0113] S1106, determining the change correction value of the temperature of the top of the blast furnace after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the change value of the temperature of the top of the blast furnace after each batch of furnace charge is put into the blast furnace.

[0114] The change value of the temperature of each batch of furnace charge after the furnace charge is corrected by the weight deviation of each batch of furnace charge, and the change correction value of the temperature of the top of the blast furnace after each batch of furnace charge is put into the blast furnace is obtained. Through the change correction value of the temperature of the top of the blast furnace after each batch of furnace charge is put into the blast furnace, the temperature inside the blast furnace can be quickly adjusted to reduce the adverse effects on the smooth operation of the blast furnace and the indicators during the smelting process of the furnace charge.

[0115] S120, determining the change value of the top gas energy after each batch of furnace charge is put into the blast furnace according to the change correction value of the top pressure and the change correction value of the temperature after each batch of furnace charge is put into the blast furnace.

[0116] S130, determining the average value of the change value of the top gas energy after N batches of furnace charge are put into the blast furnace according to the change value of the top gas energy after each batch of furnace charge is put into the blast furnace.

[0117] S140, determining the deviation value of the top gas energy according to the average value of the change value of the top gas energy and the first preset value.

[0118] S150, obtaining the total amount of N batches of furnace charge.

[0119] S160, determining the gas utilization rate index under the total amount of N batches of furnace charge.

[0120] S170, determining the deviation value of the reducibility index according to the gas utilization rate index and the second preset value.

[0121] S180, determining the smelting performance index of the blast furnace according to the deviation value of the top gas energy and the deviation value of the reducibility index.

[0122] In the implementation of the present application, the change value of the top pressure and the change value of the top temperature after each batch of furnace charge is put into the blast furnace are respectively corrected by the weight deviation of each batch of furnace charge, so that the change correction value of the top pressure and the change correction value of the top temperature after each batch of furnace charge is put into the blast furnace are obtained, and the gas pressure and the temperature of the blast furnace can be quickly adjusted by the change correction value of the top pressure and the change correction value of the top temperature after each batch of furnace charge is put into the blast furnace, thereby reducing the adverse effects on the smooth operation of the blast furnace and the indexes in the smelting process of the furnace charge.

[0123] Figure 4 is a flow chart of another method for determining the smelting performance of a blast furnace provided by an embodiment of the present application, and Figure 1 The difference between the method for determining the smelting performance of a blast furnace shown in the figure and the method for determining the smelting performance of a blast furnace shown in Figure 4 Optionally, on the basis of each of the above embodiments, the method for determining the smelting performance of a blast furnace comprises:

[0124] S080, obtaining the weight of each batch of furnace charge.

[0125] wherein M n represents the weight of each batch of furnace charge, and for example, the weight of the first batch of furnace charge is M1, the weight of the second batch of furnace charge is M2, and the weight of the nth batch of furnace charge is M n .

[0126] S090, determining the average weight of N batches of furnace charge according to the weight of each batch of furnace charge.

[0127] wherein, M O represents the average weight of N batches of furnace charges, the average weight of N batches of furnace charges is Q 均 = (Q1+Q2+Q3+……Q n ) / n.

[0128] S100, determining a weight deviation of each batch of furnace charges according to the average weight of N batches of furnace charges and the weight of each batch of furnace charges.

[0129] Specifically, the weight deviation of each batch of furnace charges is determined according to the average weight of N batches of furnace charges and the weight of each batch of furnace charges. For example, the weight deviation a1 of the first batch of furnace charges is (M1-M O ) / M O ×100%, the weight deviation a2 of the second batch of furnace charges is (M2-M O ) / M O ×100%, and the weight deviation a n n of the nth batch of furnace charges is (M n -M O ) / M O ×100%. The weight deviation of each batch of furnace charges can be positive or negative.

[0130] S1101, obtaining an actual pressure value of the top of the blast furnace after each batch of furnace charges is put into the blast furnace.

[0131] S1102, determining a change value of the pressure of the top of the blast furnace after each batch of furnace charges is put into the blast furnace according to the actual pressure value of the top of the blast furnace after each batch of furnace charges is put into the blast furnace and a corresponding third preset value before each batch of furnace charges is put into the blast furnace.

[0132] S1103, determining a correction value of the change of the pressure of the top of the blast furnace after each batch of furnace charges is put into the blast furnace according to the weight deviation of each batch of furnace charges and the change value of the pressure of the top of the blast furnace after each batch of furnace charges is put into the blast furnace.

[0133] S1104, obtaining an actual temperature value of the top of the blast furnace after each batch of furnace charges is put into the blast furnace.

[0134] S1105, determining a change value of the temperature of the top of the blast furnace after each batch of furnace charges is put into the blast furnace according to the actual temperature value of the top of the blast furnace after each batch of furnace charges is put into the blast furnace and a corresponding fourth preset value before each batch of furnace charges is put into the blast furnace.

[0135] S1106, determining a correction value of the change of the temperature of the top of the blast furnace after each batch of furnace charges is put into the blast furnace according to the weight deviation of each batch of furnace charges and the change value of the temperature of the top of the blast furnace after each batch of furnace charges is put into the blast furnace.

[0136] S120, determining the change value of the top gas energy after each batch of furnace charge is put into the blast furnace according to the change correction value of the top pressure and the change correction value of the temperature after each batch of furnace charge is put into the blast furnace.

[0137] S130, determining the average value of the change value of the top gas energy after N batches of furnace charge are put into the blast furnace according to the change value of the top gas energy after each batch of furnace charge is put into the blast furnace.

[0138] S140, determining the deviation value of the top gas energy according to the average value of the change value of the top gas energy and the first preset value.

[0139] S150, obtaining the total amount of N batches of furnace charge.

[0140] S160, determining the gas utilization rate index under the total amount of N batches of furnace charge.

[0141] S170, determining the deviation value of the reducibility index according to the gas utilization rate index and the second preset value.

[0142] S180, determining the smelting performance index of the blast furnace according to the deviation value of the top gas energy and the deviation value of the reducibility index.

[0143] In the embodiment of the present application, by calculating the weight deviation of each batch of furnace charge, the adverse effects of too large or too small weight of each batch of furnace charge on the blast furnace smelting are prevented.

[0144] Figure 5 It is another flowchart of the method for determining the smelting performance of the blast furnace provided by the embodiment of the present application, referring to Figure 5 Optionally, on the basis of the above-mentioned embodiments, the method for determining the smelting performance of the blast furnace comprises:

[0145] S110, determining the change correction value of the top pressure and the change correction value of the temperature after each batch of furnace charge is put into the blast furnace in N batches of furnace charge.

[0146] S120, determining the change value of the top gas energy after each batch of furnace charge is put into the blast furnace according to the change correction value of the top pressure and the change correction value of the temperature after each batch of furnace charge is put into the blast furnace.

[0147] S130, determining the average value of the change value of the top gas energy after N batches of furnace charge are put into the blast furnace according to the change value of the top gas energy after each batch of furnace charge is put into the blast furnace.

[0148] S1401, the deviation value of the top gas energy is equal to the difference between the average value of the change value of the top gas energy and the first preset value divided by the absolute value of the first preset value.

[0149] Specifically, the deviation value of the top gas energy β1=(Q 均 -Q O) / Q O , take absolute value, when Q 均 When Q0is equal to Q, it indicates that the smelting process of the furnace charge at the top of the furnace reaches the best ideal state (such a case basically does not exist in actual production).

[0150] S150, obtain the total amount of N batches of furnace charges.

[0151] S160, determine the coal gas utilization rate index under the total amount of N batches of furnace charges.

[0152] S1701, the reducibility index deviation value is equal to the difference between the coal gas utilization rate index and the second preset value divided by the absolute value of the second preset value.

[0153] Specifically, the reducibility index deviation value g1=(V1-V0) / V0, take absolute value, when V1=V0, g1=0, which indicates that the reduction reaction of the furnace charge in the blast furnace is ideal. The larger g1is, the greater the deviation of the smelting reduction performance of the furnace charge in the blast furnace.

[0154] S1801, the blast furnace smelting performance index is equal to the sum of the blast furnace top gas energy deviation value and the reducibility index deviation value.

[0155] Optionally, on the basis of the above embodiment, each batch of furnace charge includes a plurality of furnace charges.

[0156] Illustratively, each batch of furnace charge type includes A1, A2, A3…An, and each batch of furnace charge is arbitrarily matched by a plurality of furnace charge types, which can include A1, A2, A3 and A5, or A1, A3, A6 and An, etc. When the types of each batch of furnace charge in N batches of furnace charge are different, the corresponding values of each batch of furnace charge can be measured separately. When there are batches of furnace charges of the same type in N batches of furnace charges, the same type of furnace charge can be taken out for calculation and comparison.

[0157] Figure 6 is a flow chart of another method for determining the smelting performance of a blast furnace provided by the embodiment of the present application, which is different from the method for determining the smelting performance of a blast furnace shown in Figure 2 in that the smelting performance index of the blast furnace after storing N batches of furnace charges is put into the blast furnace, a database of the smelting performance index of the blast furnace is formed, and the method for determining the smelting performance of a blast furnace further comprises: Figure 6

[0158] S110, determine the blast furnace top pressure change correction value and the temperature change correction value of each batch of furnace charge after being put into the blast furnace.

[0159] S120, determine the blast furnace top gas energy change value of each batch of furnace charge after being put into the blast furnace according to the blast furnace top pressure change correction value and the temperature change correction value of each batch of furnace charge after being put into the blast furnace. ​

[0160] S130, determining an average value of the top gas energy change value after N batches of furnace charges are put into the blast furnace according to the top gas energy change value after each batch of furnace charges is put into the blast furnace.

[0161] S140, determining the top gas energy deviation value according to the average value of the top gas energy change value and a first preset value.

[0162] S150, obtaining the total amount of N batches of furnace charges.

[0163] S160, determining the gas utilization rate index under the total amount of N batches of furnace charges.

[0164] S170, determining the reducibility index deviation value according to the gas utilization rate index and a second preset value.

[0165] S180, determining the blast furnace smelting performance index according to the gas energy deviation value and the reducibility index deviation value.

[0166] S190, storing the blast furnace smelting performance index after N batches of furnace charges are put into the blast furnace to form a database of the blast furnace smelting performance index.

[0167] Specifically, the above-mentioned determination method of the blast furnace smelting performance can obtain the blast furnace smelting performance index after N batches of furnace charges are put into the blast furnace, and the blast furnace smelting performance index of any number of furnace charges can be obtained in the same way. Through long-period data calculation and accumulation, the database of the blast furnace smelting performance index is formed.

[0168] In the embodiment of the present application, the database of the blast furnace smelting performance index can be formed by the above-mentioned determination method of the blast furnace smelting performance, and the best smelting furnace charge composition and the best adjustment scheme suitable for the blast furnace can be obtained through the database of the blast furnace smelting performance index, which promotes the improvement of the operation level of the blast furnace, improves the stability of the blast furnace, improves the production index of the blast furnace, and promotes the energy saving, emission reduction, cost reduction and efficiency improvement of the blast furnace.

[0169] Figure 7 is a structural schematic diagram of a blast furnace smelting performance device provided by the embodiment of the present application, referring to Figure 7The device for determining the smelting performance of the blast furnace comprises a correction value determining module 10, a coal gas energy change value determining module 11, a coal gas energy change value average value determining module 12, a coal gas utilization rate index determining module 15, a total amount of the furnace burden obtaining module 14, a reducing index deviation value determining module 16 and a blast furnace smelting performance index determining module 17.

[0170] In the embodiment of the present application, the coal gas energy deviation value determining module 13 can determine the coal gas energy deviation value, and the coal gas energy deviation value can truly reflect the influence of the discharging process on the smelting performance of the blast furnace, the coal gas utilization rate index determining module 14 can determine the coal gas utilization rate index under the total amount of the N batches of furnace burden, and the reducing index deviation value can truly reflect the reduction of the furnace burden in the blast furnace, the blast furnace smelting performance index determining module 17 can determine the blast furnace smelting performance index, and the blast furnace smelting performance index can truly reflect the influence of the furnace burden on the smelting performance of the blast furnace. In the present application, the smelting process of the furnace burden in the blast furnace is tracked and analyzed to obtain a relatively accurate evaluation standard for the smelting of the furnace burden in the blast furnace, which creates conditions for optimizing the combination of the furnace burden, lays a foundation and provides a technical reference, and has a guiding significance for the selection and amount of the furnace burden.

[0171] Figure 8 It is a structure diagram of a correction value determining module provided by the embodiment of the present application, referring to Figure 8The correction value determination module 10 comprises: a furnace top actual pressure value acquisition unit 101, a furnace top pressure change value determination unit 102, a furnace top pressure change correction value determination unit 103, a furnace top actual temperature value acquisition unit 104, a furnace top temperature change value determination unit 105, and a furnace top temperature change correction value determination unit 106; the furnace top actual pressure value acquisition unit 101 is used to acquire the actual pressure value of the furnace top after each batch of furnace charge is put into the blast furnace; the furnace top pressure change value determination unit 102 is used to determine the furnace top pressure change value after each batch of furnace charge is put into the blast furnace according to the actual pressure value of the furnace top after each batch of furnace charge is put into the blast furnace and the corresponding third preset value before each batch of furnace charge is put into the blast furnace; the furnace top pressure change correction value determination unit 103 is used to determine the furnace top pressure change correction value after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the furnace top pressure change value after each batch of furnace charge is put into the blast furnace; the furnace top actual temperature value acquisition unit 104 is used to acquire the actual temperature value of the furnace top after each batch of furnace charge is put into the blast furnace; the furnace top temperature change value determination unit 105 is used to determine the furnace top temperature change value after each batch of furnace charge is put into the blast furnace according to the actual temperature value of the furnace top after each batch of furnace charge is put into the blast furnace and the corresponding fourth preset value before each batch of furnace charge is put into the blast furnace; and the furnace top temperature change correction value determination unit 106 is used to determine the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the furnace top temperature change value after each batch of furnace charge is put into the blast furnace.

[0172] The correction value determination module of the present application can determine the furnace top pressure change correction value after each batch of furnace charge is put into the blast furnace through the furnace top pressure change correction value determination unit 103, and can determine the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace through the furnace top temperature change correction value determination unit 106, so that the air pressure and temperature of the blast furnace can be quickly adjusted through the furnace top pressure change correction value and the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace, and the adverse effects of the furnace charge smelting process on the smooth operation of the blast furnace and the indicators are reduced.

[0173] Referring to Figure 7 Optionally, on the basis of the above-mentioned embodiments, the device for determining the smelting performance of the blast furnace further comprises: a furnace charge weight acquisition module 7, which is used to acquire the weight of each batch of furnace charge before determining the furnace top pressure change correction value and the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace; a furnace charge average weight determination module 8, which is used to determine the average weight of the N batches of furnace charge according to the weight of each batch of furnace charge; and a furnace charge weight deviation determination module 9, which is used to determine the weight deviation of each batch of furnace charge according to the average weight of the N batches of furnace charge and the weight of each batch of furnace charge.

[0174] Referring to Figure 7Optionally, based on the above-mentioned embodiment, the device for determining the smelting performance of the blast furnace further comprises a storage module 18, configured to store the smelting performance indexes of the blast furnace after N batches of furnace charges are put into the blast furnace, to form a database of the smelting performance indexes of the blast furnace.

[0175] The device for determining the smelting performance of the blast furnace according to the embodiment of the present application and the method for determining the smelting performance of the blast furnace according to any embodiment of the present application belong to the same inventive concept, and have corresponding beneficial effects. The detailed technical details are described in the method for determining the smelting performance of the blast furnace according to any embodiment of the present application.

[0176] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the present application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0177] The above detailed description does not constitute a limitation on the protection scope of the present application. 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 replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of determining the performance of a blast furnace, characterized in that, The method comprises the following steps: determining the change correction value of the top pressure and the change correction value of the top temperature of each batch of furnace burden after being put into the blast furnace; determining the change value of the top gas energy of each batch of furnace burden after being put into the blast furnace according to the change correction value of the top pressure and the change correction value of the top temperature of each batch of furnace burden after being put into the blast furnace; determining the average value of the change value of the top gas energy of N batches of furnace burden after being put into the blast furnace according to the change value of the top gas energy of each batch of furnace burden after being put into the blast furnace; determining the deviation value of the top gas energy according to the average value of the change value of the top gas energy and a first preset value; wherein the deviation value of the top gas energy is equal to the difference between the average value of the change value of the top gas energy and the first preset value divided by the absolute value of the first preset value; obtaining the total amount of N batches of furnace burden; determining the gas utilization rate index under the total amount of N batches of furnace burden; determining the reduction index deviation value according to the gas utilization rate index and a second preset value; wherein the reduction index deviation value is equal to the difference between the gas utilization rate index and the second preset value divided by the absolute value of the second preset value; determining the blast furnace smelting performance index according to the deviation value of the top gas energy and the reduction index deviation value; wherein the blast furnace smelting performance index is equal to the sum of the deviation value of the top gas energy and the reduction index deviation value. Wherein, the first preset value is the set change value of the top gas energy, the second preset value is the set gas utilization rate index, the types of each batch of furnace burden in N batches of furnace burden are the same, and N is greater than 1; the change value of the top gas energy is the product of the change correction value of the top pressure and the change correction value of the top temperature.

2. The method for determining the blast furnace smelting performance according to claim 1, wherein determining the change correction value of the top pressure and the change correction value of the top temperature of each batch of furnace burden after being put into the blast furnace comprises: obtaining the actual top pressure value of each batch of furnace burden after being put into the blast furnace; determining the change value of the top pressure of each batch of furnace burden after being put into the blast furnace according to the actual top pressure value of each batch of furnace burden after being put into the blast furnace and the corresponding third preset value before each batch of furnace burden is put into the blast furnace; determining the change correction value of the top pressure of each batch of furnace burden after being put into the blast furnace according to the weight deviation of each batch of furnace burden and the change value of the top pressure of each batch of furnace burden after being put into the blast furnace; obtaining the actual top temperature value of each batch of furnace burden after being put into the blast furnace; determining the change value of the top temperature of each batch of furnace burden after being put into the blast furnace according to the actual top temperature value of each batch of furnace burden after being put into the blast furnace and the corresponding fourth preset value before each batch of furnace burden is put into the blast furnace; determining the change correction value of the top temperature of each batch of furnace burden after being put into the blast furnace according to the weight deviation of each batch of furnace burden and the change value of the top temperature of each batch of furnace burden after being put into the blast furnace; Wherein, the third preset value is the top pressure value before each batch of furnace burden is put into the blast furnace, and the fourth preset value is the top temperature value before each batch of furnace burden is put into the blast furnace.

3. The method for determining the blast furnace smelting performance according to claim 2, wherein Before determining the correction value of the change of the top pressure and the correction value of the change of the top temperature of each batch of furnace burden after the batch of furnace burden is put into the blast furnace, the method further comprises: obtaining the weight of each batch of furnace burden; determining the average weight of the N batches of furnace burden according to the weight of each batch of furnace burden; determining the weight deviation of each batch of furnace burden according to the average weight of the N batches of furnace burden and the weight of each batch of furnace burden.

4. The method for determining the smelting performance of the blast furnace according to claim 1, characterized in that: each batch of furnace burden comprises a plurality of furnace burdens.

5. The method of determining the performance of a blast furnace according to claim 1, characterized in that, The method further comprises: storing the smelting performance index of the blast furnace after the N batches of furnace burden are put into the blast furnace to form a database of the smelting performance index of the blast furnace.

6. An apparatus for measuring the performance of a blast furnace, characterized in that The method comprises: a correction value determining module for determining the correction value of the change of the top pressure and the correction value of the change of the top temperature of each batch of furnace burden after the batch of furnace burden is put into the blast furnace; a gas energy change value determining module for determining the change value of the top gas energy of each batch of furnace burden after the batch of furnace burden is put into the blast furnace according to the correction value of the change of the top pressure and the correction value of the change of the top temperature of each batch of furnace burden after the batch of furnace burden is put into the blast furnace; an average value of the change value of the gas energy determining module for determining the average value of the change value of the top gas energy of the N batches of furnace burden after the batch of furnace burden is put into the blast furnace according to the change value of the top gas energy of each batch of furnace burden after the batch of furnace burden is put into the blast furnace; a gas energy deviation value determining module for determining the deviation value of the top gas energy according to the average value of the change value of the top gas energy and a first preset value; wherein the deviation value of the top gas energy is equal to the difference between the average value of the change value of the top gas energy and the first preset value divided by the absolute value of the first preset value; a total amount of furnace burden obtaining module for obtaining the total amount of the N batches of furnace burden; a gas utilization rate index determining module for determining the gas utilization rate index under the total amount of the N batches of furnace burden; a reducibility index deviation value determining module for determining the deviation value of the reducibility index according to the gas utilization rate index and a second preset value; wherein the deviation value of the reducibility index is equal to the difference between the gas utilization rate index and the second preset value divided by the absolute value of the second preset value; a blast furnace smelting performance index determining module for determining the smelting performance index of the blast furnace according to the deviation value of the top gas energy and the deviation value of the reducibility index; wherein the smelting performance index of the blast furnace is equal to the sum of the deviation value of the top gas energy and the deviation value of the reducibility index. The first preset value is a set change value of the top gas energy, the second preset value is a set gas utilization rate index, the types of each batch of furnace burden in the N batches of furnace burden are the same, and N is greater than 1; the change value of the top gas energy is the product of the correction value of the change of the top pressure and the correction value of the change of the top temperature.

7. The device for determining the smelting performance of the blast furnace according to claim 6, characterized in that: the correction value determining module comprises a top actual pressure value obtaining unit, a top pressure change value determining unit, a top pressure change correction value determining unit, a top actual temperature value obtaining unit, a top temperature change value determining unit and a top temperature change correction value determining unit. The furnace top actual pressure value acquisition unit is configured to acquire the actual pressure value of the furnace top after each batch of furnace charge is put into the blast furnace. The furnace top pressure change value determination unit is configured to determine the furnace top pressure change value after each batch of furnace charge is put into the blast furnace according to the actual pressure value of the furnace top after each batch of furnace charge is put into the blast furnace and the corresponding third preset value before each batch of furnace charge is put into the blast furnace. The furnace top pressure change correction value determination unit is configured to determine the furnace top pressure change correction value after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the furnace top pressure change value after each batch of furnace charge is put into the blast furnace. The furnace top actual temperature value acquisition unit is configured to acquire the actual temperature value of the furnace top after each batch of furnace charge is put into the blast furnace. The furnace top temperature change value determination unit is configured to determine the furnace top temperature change value after each batch of furnace charge is put into the blast furnace according to the actual temperature value of the furnace top after each batch of furnace charge is put into the blast furnace and the corresponding fourth preset value before each batch of furnace charge is put into the blast furnace. The furnace top temperature change correction value determination unit is configured to determine the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace according to the weight deviation of each batch of furnace charge and the furnace top temperature change value after each batch of furnace charge is put into the blast furnace. The third preset value is the furnace top pressure value before each batch of furnace charge is put into the blast furnace, and the fourth preset value is the furnace top temperature value before each batch of furnace charge is put into the blast furnace.

8. The device for the performance of a blast furnace smelting according to claim 7, characterized in that, Further comprising: The furnace charge weight acquisition module is configured to acquire the weight of each batch of furnace charge before determining the furnace top pressure change correction value and the furnace top temperature change correction value after each batch of furnace charge is put into the blast furnace. The furnace charge average weight determination module is configured to determine the average weight of N batches of furnace charge according to the weight of each batch of furnace charge. The furnace charge weight deviation determination module is configured to determine the weight deviation of each batch of furnace charge according to the average weight of N batches of furnace charge and the weight of each batch of furnace charge.

9. The apparatus for the performance of a blast furnace smelt according to claim 6, characterized in that, Further comprising: The storage module is configured to store the blast furnace smelting performance index after N batches of furnace charge are put into the blast furnace to form a database of blast furnace smelting performance indexes.

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