An online analysis method, device, storage medium and equipment for chemical composition of molten iron in a molten iron tank

Abstract

The present invention discloses an on-line analysis method, device, storage medium and equipment for the chemical composition of molten iron in a hot metal ladle. Among them, the on-line analysis method fits a curve function of the weight of the molten iron in the hot metal ladle changing with the inflow time t and an interpolation or smoothing function of the content of element i in the molten iron before flowing into the hot metal ladle changing with the inflow time t according to the weight information of the molten iron flowing into the hot metal ladle corresponding to different moments and the content information of element i in the molten iron before flowing into the hot metal ladle, and then calculates the total weight of the molten iron in the hot metal ladle at any moment t n during the molten iron discharge period and the average content information of element i in the molten iron in the hot metal ladle at any moment t n during the molten iron discharge period. Thus, the on-line analysis of the weight and chemical composition of the molten iron in the hot metal ladle at any moment during the entire discharge period or the molten iron flowing into the hot metal ladle during a certain period is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature melt composition detection, and specifically relates to an online analysis method, device, storage medium and equipment for the chemical composition of molten iron in a molten iron tank. Background Art

[0002] Hot metal from blast furnaces is the main raw material for the steelmaking process. The chemical composition of hot metal is crucial to the amount of flux required for hot metal pretreatment before steelmaking and the quality of steelmaking. At present, the chemical composition of molten iron in the hot metal tank is often analyzed offline in the laboratory after manual sampling. The offline detection process is time-consuming and the test results are seriously delayed. In addition, due to the differences in the chemical composition of hot metal during the hot metal discharge cycle, the sampling test has sampling representativeness problems, and it is impossible to timely and effectively feedback the chemical composition information of the molten iron in the hot metal tank. Although some detection methods can currently realize online detection of hot metal composition, due to the limitation of the detection frequency of the detection equipment, the online detection is non-continuous detection, and the hot metal composition at some times cannot be detected, that is, it is impossible to realize online analysis and detection of the hot metal composition during the entire discharge cycle or a certain period of time. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the present invention is to propose an online analysis method for the chemical composition of molten iron in a molten iron tank. The method realizes the online analysis of the weight and chemical composition of the molten iron in the molten iron tank at any time during the entire discharge cycle or the molten iron flowing into the molten iron tank during a certain period of time, and the method is real-time and fast, thereby providing key technical support for the online detection and analysis of the chemical composition of the molten iron in the molten iron tank during steel smelting.

[0004] A second objective of the present invention is to provide a computer-readable storage medium.

[0005] A third object of the present invention is to provide an analysis device.

[0006] A fourth object of the present invention is to provide an on-line analysis device for the chemical composition of molten iron in a molten iron tank.

[0007] To achieve the above objectives, a first aspect of an embodiment of the present invention provides an online analysis method for the chemical composition of molten iron in a molten iron tank. According to an embodiment of the present invention, the method comprises:

[0008] (1) During the process of molten iron flowing into the molten iron tank, obtain the weight information of the molten iron flowing into the molten iron tank at different times And the content of element i in the molten iron before it flows into the molten iron ladle

[0009] (2) According to the weight information of the molten iron flowing into the molten iron tank at different times The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting; and the content information of the element i in the molten iron before flowing into the molten iron tank corresponding to different time points The interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t is obtained by fitting i (t);

[0010] (3) According to the curve function M(t), calculate and obtain the t at any time in the molten iron discharge cycle n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And according to the curve function M(t) and the interpolation or smoothing function C i (t), calculate the t at any time in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period information.

[0011] According to the on-line analysis method of the chemical composition of molten iron in the molten iron tank according to the embodiment of the present invention, the method is based on the weight information of the molten iron flowing into the molten iron tank at different times. And the content of element i in the molten iron before it flows into the molten iron ladle The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t and the interpolation or smoothing function C of the content of the element i in the molten iron before flowing into the molten iron tank changing with the inflow time t are obtained by fitting. i (t), then according to the above curve function M(t) and the interpolation or smoothing function C i (t) can be calculated to obtain any time t in the molten iron discharge cycle n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And any time t in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period Thus, the weight and chemical composition of the molten iron in the molten iron tank at any time during the entire discharge cycle or the molten iron flowing into the molten iron tank during a certain period of time can be analyzed online, and the method is real-time and fast, thus providing key technical support for the online detection and analysis of the chemical composition of the molten iron in the molten iron tank during steel smelting.

[0012] In addition, the online analysis method for the chemical composition of molten iron in the molten iron ladle according to the above embodiment of the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, in step (1), an online component analyzer is used to obtain the content information of element i in the molten iron before it flows into the molten iron ladle at different times.

[0014] In some embodiments of the present invention, in step (1), a track scale is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times.

[0015] In some embodiments of the present invention, in step (1), the weight information of the molten iron flowing into the molten iron tank at different times is obtained at intervals of 2-6 minutes. And the content of element i in the molten iron before it flows into the molten iron ladle

[0016] In some embodiments of the present invention, in step (1), at least 20 corresponding weight information of the molten iron flowing into the molten iron tank at different times is obtained. And the content of element i in the molten iron before it flows into the molten iron ladle

[0017] In some embodiments of the present invention, in step (1), the element i is at least one of Si, S, Mn, Ti, Cu, P, Sn, As and C.

[0018] In some embodiments of the present invention, in step (3), during the molten iron discharge cycle, at any time t n Total weight of molten iron flowing into the molten iron tank The calculation formula is:

[0019]

[0020] Among them, M(t0) is the net weight of the molten iron tank, M(t n ) is t n The total weight of the molten iron tank at the moment.

[0021] In some embodiments of the present invention, in step (3), during the molten iron discharge cycle, any t m to nTotal weight of molten iron flowing into the molten iron tank during the period The calculation formula is:

[0022]

[0023] Among them, M(t n ) is t n The total weight of the molten iron tank at this moment, M(t m ) is t m The total weight of the molten iron tank at the moment.

[0024] In some embodiments of the present invention, in step (3), during the molten iron discharge cycle, at any time t n The total weight of element i in the molten iron flowing into the molten iron ladle is the curve function M(t) and the interpolation or smoothing function C i The integral area of ​​the product of (t) is calculated as:

[0025]

[0026] During the molten iron discharge cycle, at any time t n The content of element i in the molten iron flowing into the molten iron tank at the time is:

[0027]

[0028] In some embodiments of the present invention, in step (3), during the molten iron discharge cycle, any t m to n The total weight of element i in the molten iron flowing into the molten iron ladle during the time period is the curve function M(t) and the interpolation or smoothing function C i The integral area of ​​the product of (t) is calculated as:

[0029]

[0030] Any t in the molten iron discharge cycle m to n The average content of element i in the molten iron flowing into the molten iron tank during the detection period:

[0031]

[0032] In another aspect of the present invention, a computer-readable storage medium is proposed. According to an embodiment of the present invention, an online analysis program for the chemical composition of molten iron in a molten iron ladle is stored on the computer-readable storage medium. When the online analysis program for the chemical composition of molten iron in a molten iron ladle is executed by a processor, an online analysis method for the chemical composition of molten iron in a molten iron ladle is implemented.

[0033] In the third aspect of the present invention, an analysis device is proposed. According to an embodiment of the present invention, the analysis device includes a memory, a processor, and an online analysis program for the chemical composition of the molten iron in the molten iron ladle, which is stored in the memory and can be run on the processor. When the processor executes the online analysis program for the chemical composition of the molten iron in the molten iron ladle, the online analysis method for the chemical composition of the molten iron in the molten iron ladle is implemented.

[0034] In a fourth aspect of the present invention, the present invention provides an online analysis device for the chemical composition of molten iron in a molten iron ladle, the device comprising:

[0035] The acquisition module is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times And the content of element i in the molten iron before it flows into the molten iron ladle

[0036] The fitting module is used to calculate the weight of the molten iron flowing into the molten iron tank at different times. The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting; and the content information of the element i in the molten iron before flowing into the molten iron tank corresponding to different time points The interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t is obtained by fitting i (t);

[0037] A calculation module is used to calculate the molten iron discharge cycle at any time t according to the curve function M(t). n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And according to the curve function M(t) and the interpolation or smoothing function C i (t), calculate the t at any time in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period information.

[0038] According to the online analysis device for the chemical composition of molten iron in the molten iron tank according to the embodiment of the present invention, online analysis of the weight and chemical composition of the molten iron in the molten iron tank at any time in the entire discharge cycle or the molten iron flowing into the molten iron tank in a certain period of time is realized, and the method is real-time and fast, thereby providing key technical support for the online detection and analysis of the chemical composition of the molten iron in the molten iron tank in steel smelting.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 It is a schematic flow chart of an online analysis method of the chemical composition of molten iron in a molten iron tank according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the change of the weight of molten iron obtained by the track scale in Example 1 over time;

[0043] Figure 3 This is a schematic diagram of the change of Ti element content in molten iron over time in Example 1. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In one aspect of the present invention, the present invention provides an online analysis method for the chemical composition of molten iron in a molten iron ladle. Figure 1 , the method comprising:

[0046] S100: When the molten iron flows into the molten iron tank, the weight information of the molten iron flowing into the molten iron tank corresponding to different moments is obtained. And the content of element i in the molten iron before it flows into the molten iron ladle

[0047] Specifically, the embodiment of the present invention uses an online component analyzer to obtain the content information of element i in the molten iron before it flows into the molten iron tank at different times. The above content information Refers to mass percentage information.

[0048] The online composition analyzer uses an optical system to focus high-energy pulsed lasers on the high-temperature molten iron to be tested to generate plasma, and then uses a spectral detector to detect the spectral data of the plasma signal light. Finally, by processing the spectral data, it realizes online detection of the composition of the molten iron before it flows into the molten iron tank, and can obtain the content information of a certain set element or several set elements in the molten iron.

[0049] It should be noted that the online component analyzer can detect the content of the set component contained in the surface of the object at a frequency of thirty times per second. However, due to the needs of on-site production and the high-frequency detection limitation of the analyzer itself, the present invention sets the detection of the content of a set element or several set elements in the molten iron before flowing into the molten iron tank once every 2-6 minutes, so as to obtain the weight information of the molten iron flowing into the molten iron tank at different times. And the content of element i in the molten iron before it flows into the molten iron ladle Similarly, the present invention sets the detection of the weight information of the molten iron flowing into the molten iron tank every 2-6 minutes, so as to obtain the weight information of the molten iron flowing into the molten iron tank at different times.

[0050] Specifically, the above-mentioned element i is the element set in the online component analyzer, and the online component analyzer can only detect the content of the set element. For example, the set element i can be at least one of Si, S, Mn, Ti, Cu, P, Sn, As and C.

[0051] S200: According to the weight information of the molten iron flowing into the molten iron tank at different times The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting; and the content information of the element i in the molten iron before flowing into the molten iron tank corresponding to different time points The interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t is obtained by fitting i (t).

[0052] As mentioned above, due to the needs of on-site production and the high-frequency detection limitations of the analyzer itself, the online component analyzer can only detect the content of a certain set element or several set elements in the molten iron before it flows into the molten iron tank once every 2-6 minutes, and it is impossible to detect every moment of the molten iron flowing into the molten iron tank, and it is impossible to realize the online analysis and detection of the molten iron composition in the entire discharge cycle or a certain period of time. In order to overcome this technical problem, the embodiment of the present invention is based on the content information of element i in the molten iron before it flows into the molten iron tank corresponding to different moments. The interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t is obtained by fitting i (t), which is used in the subsequent steps to calculate t at any time in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period At the same time, according to the corresponding information of the weight of the molten iron flowing into the molten iron tank at different times The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting, which is used in the subsequent steps to calculate the weight of the molten iron at any time t in the molten iron discharge cycle. n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period

[0053] Specifically, in step S100, at least 20 corresponding weight information of the molten iron flowing into the molten iron tank at different times is obtained. And the content of element i in the molten iron before it flows into the molten iron ladle Thus, it is possible to ensure that the interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle changes with the inflow time t. i (t) and the accuracy of the curve function M(t) of the weight of the molten iron in the molten iron ladle changing with the inflow time t. It can be understood that the more times the detection is performed, the more accurate the interpolation or smoothing function C obtained by fitting is. i The higher the accuracy of (t) and the curve function M(t).

[0054] As a specific example, see the attached Figure 2 The curve function M(t) obtained by fitting the weight of the molten iron in the molten iron tank as the inflow time t is a two-dimensional linear function. It should be noted that the fitting process of the curve function M(t) of the weight of the molten iron in the molten iron tank as the inflow time t belongs to the conventional technology in this field and will not be repeated here.

[0055] Specifically, the smoothing function C of the content of element i in the molten iron before flowing into the molten iron ladle as a function of the inflow time t is: i The fitting process of (t) is: connect the adjacent time points with a smooth curve to form a smoothing function C i (t), if attached Figure 3 shown.

[0056] Specifically, the interpolation processing function C of the content of element i in the molten iron before flowing into the molten iron ladle as the flow time t changes i The fitting process of (t) is: connect the adjacent time points with a straight line to form the interpolation function C i (t).

[0057] S300: Calculate and obtain the time t at any time in the molten iron discharge cycle according to the curve function M(t). n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And according to the curve function M(t) and the interpolation or smoothing function C i (t), calculate the t at any time in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period information.

[0058] Specifically, during the molten iron discharge cycle, at any time t n Total weight of molten iron flowing into the molten iron tank The calculation formula is:

[0059]

[0060] Among them, M(t0) is the net weight of the molten iron tank, M(t n ) is t n The total weight of the molten iron tank at the moment.

[0061] Specifically, during the molten iron discharge cycle, any t m to n Total weight of molten iron flowing into the molten iron tank during the period The calculation formula is:

[0062]

[0063] Among them, M(t n ) is t n The total weight of the molten iron tank at this moment, M(t m ) is t m The total weight of the molten iron tank at the moment.

[0064] Specifically, during the molten iron discharge cycle, at any time t nThe total weight of element i in the molten iron flowing into the molten iron ladle is the curve function M(t) and the interpolation or smoothing function C i The integral area of ​​the product of (t) is calculated as:

[0065]

[0066] During the molten iron discharge cycle, at any time t n The content of element i in the molten iron flowing into the molten iron tank at the time is:

[0067]

[0068] It should be explained that the smoothing function C i (t) is obtained by connecting adjacent time points using a smooth curve, so the smoothing function C i (t) is actually composed of multiple curve functions, namely:

[0069]

[0070] Wherein, Δt is the detection time interval of the online composition analyzer. According to the need for online detection of molten iron composition in the on-site production process, each time interval may be the same time interval or different time intervals.

[0071] Similarly, the interpolation processing function C i (t) is obtained by connecting adjacent time points with straight lines, so the interpolation function C i (t) is actually composed of multiple linear functions.

[0072] Then, integrate the product of each linear or curvilinear function with the curvilinear function M(t), and finally add up the integral values ​​of each segment to get the n The total weight of element i in the molten iron flowing into the molten iron ladle at time .

[0073] Specifically, during the molten iron discharge cycle, any t m to n The total weight of element i in the molten iron flowing into the molten iron ladle during the time period is the curve function M(t) and the interpolation or smoothing function C i The integral area of ​​the product of (t) is calculated as:

[0074]

[0075] Any t in the molten iron discharge cycle m to n The average content of element i in the molten iron flowing into the molten iron tank during the detection period:

[0076]

[0077] Similarly, at any t m to n In the process of calculating the total weight of element i in the molten iron flowing into the molten iron tank during the period, the interpolation or smoothing function C i (t) is divided into multiple linear or curvilinear functions according to the detection time point, and then each linear or curvilinear function is integrated with the product of the curvilinear function M(t). Finally, the integral values ​​of each segment are added together to obtain the value of any t m to n The total weight of element i in the molten iron flowing into the molten iron ladle during the period.

[0078] According to the on-line analysis method of the chemical composition of molten iron in the molten iron tank according to the embodiment of the present invention, the method is based on the weight information of the molten iron flowing into the molten iron tank at different times. And the content of element i in the molten iron before it flows into the molten iron ladle The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t and the interpolation or smoothing function C of the content of the element i in the molten iron before flowing into the molten iron tank changing with the inflow time t are obtained by fitting. i (t), then according to the above curve function M(t) and the interpolation or smoothing function C i (t) can be calculated to obtain any time t in the molten iron discharge cycle n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And any time t in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period Thus, the weight and chemical composition of the molten iron in the molten iron tank at any time during the entire discharge cycle or the molten iron flowing into the molten iron tank during a certain period of time can be analyzed online, and the method is real-time and fast, thus providing key technical support for the online detection and analysis of the chemical composition of the molten iron in the molten iron tank during steel smelting.

[0079] In another aspect of the present invention, a computer-readable storage medium is proposed. According to an embodiment of the present invention, an online analysis program for the chemical composition of molten iron in a molten iron ladle is stored on the computer-readable storage medium. When the online analysis program for the chemical composition of molten iron in a molten iron ladle is executed by a processor, an online analysis method for the chemical composition of molten iron in a molten iron ladle is implemented.

[0080] In the third aspect of the present invention, an analysis device is proposed. According to an embodiment of the present invention, the analysis device includes a memory, a processor, and an online analysis program for the chemical composition of the molten iron in the molten iron ladle, which is stored in the memory and can be run on the processor. When the processor executes the online analysis program for the chemical composition of the molten iron in the molten iron ladle, the online analysis method for the chemical composition of the molten iron in the molten iron ladle is implemented.

[0081] In a fourth aspect of the present invention, the present invention provides an online analysis device for the chemical composition of molten iron in a molten iron ladle, the device comprising:

[0082] The acquisition module is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times And the content of element i in the molten iron before it flows into the molten iron ladle

[0083] The fitting module is used to calculate the weight of the molten iron flowing into the molten iron tank at different times. The curve function M(t) of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting; and the content information of the element i in the molten iron before flowing into the molten iron tank corresponding to different time points The interpolation or smoothing function C of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t is obtained by fitting i (t);

[0084] A calculation module is used to calculate the molten iron discharge cycle at any time t according to the curve function M(t). n Total weight of molten iron in the molten iron tank and / or any t m to n Total weight of molten iron flowing into the molten iron tank during the period And according to the curve function M(t) and the interpolation or smoothing function C i (t), calculate the t at any time in the molten iron discharge cycle n The average content of element i in the molten iron in the molten iron tank at Information and / or any m to n The average content of element i in the molten iron flowing into the molten iron tank during the period information.

[0085] According to the online analysis device for the chemical composition of molten iron in the molten iron tank according to the embodiment of the present invention, online analysis of the weight and chemical composition of the molten iron in the molten iron tank at any time in the entire discharge cycle or the molten iron flowing into the molten iron tank in a certain period of time is realized, and the method is real-time and fast, thereby providing key technical support for the online detection and analysis of the chemical composition of the molten iron in the molten iron tank in steel smelting.

[0086] It should be noted that the specific implementation method of the online analysis device for the chemical composition of the molten iron in the molten iron ladle in the embodiment of the present invention is similar to the specific implementation method of the online analysis method for the chemical composition of the molten iron in the molten iron ladle in the embodiment of the present invention. Please refer to the description of the method part for details. In order to reduce redundancy, it will not be repeated here.

[0087] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0088] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] The embodiments of the present invention are described in detail below. It should be noted that the embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0090] Example 1

[0091] This embodiment provides an online analysis method for the chemical composition of molten iron in a molten iron tank, comprising the following steps:

[0092] 1) During the process of molten iron flowing into the molten iron ladle, an online component analyzer is used to obtain the Ti content information of the molten iron before flowing into the molten iron ladle at different times. The detection time interval is 3 minutes, and the entire emission cycle is about 120 minutes, as shown in Table 1.

[0093] When the molten iron flows into the molten iron tank, the track scale is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times. and content information Corresponding molten iron weight information As shown in Table 2.

[0094] Table 1

[0095]

[0096] Table 1 continued

[0097]

[0098] Table 1 continued

[0099]

[0100] Table 1 continued

[0101]

[0102]

[0103] Table 2

[0104]

[0105] Table 2 continued

[0106]

[0107] Table 2 continued

[0108]

[0109] Table 2 continued

[0110]

[0111] 2) According to the weight information of the molten iron flowing into the molten iron tank at different times in Table 2 The weight of molten iron is obtained by fitting The curve fitting function that changes with time t is shown in the following figure. Figure 2 As shown:

[0112] M(t)=0.00136t 2 +0.5197t+3.969

[0113] The entire molten iron discharge cycle, i.e., t n =Total weight of molten iron in the ladle at 120 minutes:

[0114]

[0115] That is, the total weight of molten iron discharged during the entire discharge cycle is 81.95 tons.

[0116] 3) According to the Ti content information of the molten iron before flowing into the molten iron ladle at different times in Table 1 The curve fitting function C of the change of the Ti content in molten iron with time t is obtained by piecewise cubic Hermite interpolation fitting i (t), if attached Figure 3 As shown:

[0117]

[0118] in,

[0119]

[0120] ...

[0121]

[0122]

[0123] That is, the total weight of elemental Ti in the molten iron in the molten iron ladle during the entire discharge cycle is 1.3690 tons;

[0124] The time t in the whole molten iron discharge cycle n =The total content of element Ti in the molten iron in the molten iron ladle at 120 minutes is:

[0125]

[0126] Example 2

[0127] This embodiment provides an arbitrary t m to n The on-line analysis method of the chemical composition of molten iron flowing into the molten iron tank within a period of time comprises the following steps:

[0128] 1) The weight of molten iron obtained by the track scale during the entire molten iron discharge cycle As time t changes Figure 2 As shown, the weight of molten iron is obtained by data fitting Curve fitting function that changes with time t:

[0129] M(t)=0.00136t 2 +0.5197t+3.969

[0130] Then, during the 15th to 30th minute period of the molten iron discharge cycle, i.e., t n = 30 minutes, t m =Total weight of molten iron in the molten iron tank during the period corresponding to 15 minutes:

[0131]

[0132] That is, the total weight of molten iron flowing into the molten iron ladle from the 15th to the 30th minute during the discharge cycle is 15.02 tons.

[0133] 2) During the entire molten iron discharge cycle, the Ti content in the molten iron changes with time t as follows: Figure 3 As shown, during the 15th to 30th minute period of the molten iron discharge cycle, i.e., t m = 15 minutes, t n = The total weight of element Ti in the molten iron flowing into the molten iron ladle during the period corresponding to 30 minutes is:

[0134]

[0135] During the 15th to 30th minute of the molten iron discharge cycle, i.e., t m = 15 minutes, t n =The total content of element Ti in the molten iron flowing into the molten iron tank during the period corresponding to 30 minutes is:

[0136]

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0138] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An on-line analysis method for the chemical composition of molten iron in a molten iron tank, characterized in that: include: (1) During the process of molten iron flowing into the molten iron tank, obtain the weight information of the molten iron flowing into the molten iron tank at different times And the content of element i in the molten iron before it flows into the molten iron ladle ; (2) The weight of the molten iron flowing into the molten iron tank at different times , the curve function of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting ; and the content information of element i in the molten iron before it flows into the molten iron ladle at different times , the interpolation or smoothing function of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t changes is obtained by fitting ; (3) According to the curve function , calculate and obtain the molten iron discharge cycle at any time Total weight of molten iron in the ladle and / or any to Total weight of molten iron flowing into the molten iron tank during the period ; and according to the curve function and the interpolation or smoothing function , calculate the molten iron discharge cycle at any time The average content of element i in the molten iron in the molten iron tank at Information and / or any to Elements in the molten iron flowing into the molten iron tank during the period i The average content information; In step (3), during the molten iron discharge cycle, at any time Total weight of molten iron flowing into the molten iron tank The calculation formula is: in, M ( ) is the net weight of the molten iron tank, M ( )for The total weight of the molten iron tank at the moment; During the molten iron discharge cycle, any to Total weight of molten iron flowing into the molten iron tank during the period The calculation formula is: in, M ( )for The total weight of the molten iron tank at this moment, M ( )for The total weight of the molten iron tank at the moment; In step (3), during the molten iron discharge cycle, at any time Elements in the molten iron flowing into the molten iron tank i The total weight is the curve function and the interpolation or smoothing function The integral area of ​​the product of is calculated as: During the molten iron discharge cycle, at any time Elements in the molten iron flowing into the molten iron tank i The content is: 。 2. The method according to claim 1, characterized in that In step (1), an online component analyzer is used to obtain the content information of element i in the molten iron before it flows into the molten iron ladle at different times. .

3. The method according to claim 1, characterized in that In step (1), a track scale is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times. .

4. The method according to claim 1, characterized in that: In step (1), the weight information of the molten iron flowing into the molten iron tank at different times is obtained at intervals of 2-6 minutes. And the content of element i in the molten iron before it flows into the molten iron ladle .

5. The method according to claim 1, characterized in that In step (1), obtain the weight information of the molten iron flowing into the molten iron tank at least at 20 different times. And the content of element i in the molten iron before it flows into the molten iron ladle .

6. The method according to claim 1, characterized in that In step (1), the element i It is at least one of Si, S, Mn, Ti, Cu, P, Sn, As and C.

7. The method according to claim 1, characterized in that In step (3), during the molten iron discharge cycle, any to The total weight of element i in the molten iron flowing into the molten iron tank during the period is the curve function and the interpolation or smoothing function The integral area of ​​the product of is calculated as: Any time during the molten iron discharge cycle to Elements in the molten iron flowing into the molten iron tank during the detection period i Average content of: 。 8. A computer-readable storage medium, characterized in that: An online analysis program for the chemical composition of molten iron in a molten iron ladle is stored thereon, and when the online analysis program for the chemical composition of molten iron in a molten iron ladle is executed by a processor, an online analysis method for the chemical composition of molten iron in a molten iron ladle according to any one of claims 1-7 is implemented.

9. An analysis device, characterized in that: The invention comprises a memory, a processor and an online analysis program of the chemical composition of molten iron in a molten iron ladle which is stored in the memory and can be run on the processor. When the processor executes the online analysis program of the chemical composition of molten iron in the molten iron ladle, an online analysis method of the chemical composition of molten iron in the molten iron ladle according to any one of claims 1 to 7 is implemented.

10. An analysis device for implementing the on-line analysis method of the chemical composition of molten iron in a molten iron ladle as claimed in any one of claims 1 to 7, characterized in that: include: The acquisition module is used to obtain the weight information of the molten iron flowing into the molten iron tank at different times And the content of element i in the molten iron before it flows into the molten iron ladle ; The fitting module is used to calculate the weight of the molten iron flowing into the molten iron tank at different times. , the curve function of the weight of the molten iron in the molten iron tank changing with the inflow time t is obtained by fitting ; and the content information of element i in the molten iron before it flows into the molten iron ladle at different times , the interpolation or smoothing function of the content of element i in the molten iron before it flows into the molten iron ladle as the inflow time t changes is obtained by fitting ; A calculation module is used to calculate the curve function according to the curve function. , calculate and obtain the molten iron discharge cycle at any time Total weight of molten iron in the ladle and / or any to Total weight of molten iron flowing into the molten iron tank during the period ; and according to the curve function and the interpolation or smoothing function , calculate the molten iron discharge cycle at any time The average content of element i in the molten iron in the molten iron tank at Information and / or any to Elements in the molten iron flowing into the molten iron tank during the period i The average content information; During the molten iron discharge cycle, at any time Total weight of molten iron flowing into the molten iron tank The calculation formula is: in, M ( ) is the net weight of the molten iron tank, M ( )for The total weight of the molten iron tank at the moment; During the molten iron discharge cycle, any to Total weight of molten iron flowing into the molten iron tank during the period The calculation formula is: in, M ( )for The total weight of the molten iron tank at this moment, M ( )for The total weight of the molten iron tank at the moment; During the molten iron discharge cycle, at any time Elements in the molten iron flowing into the molten iron tank i The total weight is the curve function and the interpolation or smoothing function The integral area of ​​the product of is calculated as: During the molten iron discharge cycle, at any time Elements in the molten iron flowing into the molten iron tank i The content is: 。

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