Method for contrastive analysis of blast furnace smelting parameters by applying Rist operating line

Abstract

The invention relates to a method for contrastively analyzing blast furnace smelting parameters by using a Rist operating line. The method comprises the following steps: calculating data points on blast furnace operating lines with different volumes according to a Rist operating line theory; drawing operation line graphs of corresponding blast furnaces according to the data points on the blast furnace operation lines with different volumes; and analyzing the parameter change according to the operation line graph of the blast furnace to obtain the optimization potential of fuel consumption among different blast furnaces. According to the method, the fuel consumption difference between different blast furnaces can be effectively identified by drawing and analyzing the operation line graph of the blast furnace, and the optimization potential is analyzed. By means of the capacity, steel production enterprises can obviously reduce fuel consumption on the premise that the yield and quality are kept.

Description

Technical Field

[0001] This invention relates to the field of blast furnace smelting technology, and in particular to a method for comparative analysis of blast furnace smelting parameters using the Rist operating line. Background Technology

[0002] Blast furnace ironmaking is currently the most important ironmaking method in steel production. By adding iron ore, coke, limestone, and other auxiliary materials to the blast furnace, the iron ore is reduced and melted under high-temperature conditions to obtain pig iron. The efficiency and stability of blast furnace operation directly affect the output and quality of iron; therefore, optimizing blast furnace smelting parameters is an important way for steel enterprises to improve production efficiency, reduce costs, and achieve energy conservation and emission reduction.

[0003] The Rist operating line is a theoretical tool used to analyze blast furnace thermal efficiency and material balance. By modeling the physicochemical reactions in various regions within the blast furnace, the Rist operating line can help engineers predict key parameters such as temperature distribution, gas composition, and heat consumption. However, due to the complexity of the blast furnace system, a single Rist operating line analysis method cannot fully reflect the interactive effects between different smelting parameters. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a method for comparative analysis of blast furnace smelting parameters using the Rist operating line.

[0005] A method for comparative analysis of blast furnace smelting parameters using the Rist operating line includes:

[0006] Step 1: Calculate the data points on the blast furnace operating lines of different volumes based on the Rist operating line theory;

[0007] Step 2: Draw the corresponding blast furnace operation line graph based on the data points on the blast furnace operation line of different volumes;

[0008] Step 3: Analyze parameter changes based on the blast furnace operation line graph to obtain the optimization potential of fuel consumption among different blast furnaces.

[0009] Preferably, in step 1, the values ​​of points A, E, W, P, V, and U in the blast furnace operating line are calculated using the Y-axis "subtraction method" based on the Rist operating line theory.

[0010] Preferably, in step 3, the slope of the actual operating line of the corresponding blast furnace is calculated based on the blast furnace operating line diagram.

[0011] Preferably, in step 3, the slope of the actual operating line of different blast furnaces is compared with the slope of the ideal operating line to find the reasons for the difference in blast furnace fuel consumption.

[0012] This invention also provides a system for comparative analysis of blast furnace smelting parameters using the Rist operating line, comprising:

[0013] The data point calculation module is used to calculate various data points on the blast furnace operating lines of different volumes based on the Rist operating line theory.

[0014] The parameter calculation module is used to draw the corresponding blast furnace operation line graph based on various data points on the blast furnace operation line of different volumes.

[0015] The fuel consumption optimization potential determination module is used to analyze parameter changes based on the blast furnace operation line graph to obtain the optimization potential of fuel consumption among different blast furnaces.

[0016] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, characterized in that the computer program, when executed by the processor, implements the steps in the above-described method for comparative analysis of blast furnace smelting parameters using Rist operation lines.

[0017] The present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements the steps in the above-described method for comparative analysis of blast furnace smelting parameters using the Rist operating line.

[0018] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0019] This invention relates to a method for comparing and analyzing blast furnace smelting parameters using Rist operating lines. Compared with existing technologies, this invention can effectively identify fuel consumption differences between different blast furnaces and analyze optimization potential by drawing and analyzing blast furnace operating line graphs. This capability enables steel production enterprises to significantly reduce fuel consumption while maintaining output and quality.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1The diagram of the A-type blast furnace operation line provided by this invention;

[0023] Figure 2 The diagram of the B blast furnace operation line provided by this invention;

[0024] Figure 3 The diagram of the C-type blast furnace operation line provided by this invention;

[0025] Figure 4 A comparison of key parameters of blast furnaces B and C provided for this invention. Detailed Implementation

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Please see Figure 1-4 A method for comparative analysis of blast furnace smelting parameters using the Rist operating line includes:

[0030] Step 1: Calculate the data points on the blast furnace operating lines of different volumes based on the Rist operating line theory;

[0031] Step 2: Draw the corresponding blast furnace operation line graph based on the data points on the blast furnace operation line of different volumes;

[0032] Step 3: Analyze parameter changes based on the blast furnace operation line graph to obtain the optimization potential of fuel consumption among different blast furnaces.

[0033] The method for comparing and analyzing blast furnace smelting parameters using the Rist operating line in this invention will be further explained below with reference to specific embodiments:

[0034] Based on the Rist operating line theory, the values ​​of points A, E, W, P, V, and U in the blast furnace operating line are calculated using the Y-axis "subtraction method." This yields data such as furnace working efficiency, Q-value of other heat consumption in the high-temperature zone, and direct reduction degree. The operating line is then plotted, and by comparing the data, the changes in key parameters are analyzed to identify the main reasons for these changes in the blast furnace. Further comparison of the calculation results reveals the optimization potential for fuel consumption among different blast furnaces.

[0035] The blast furnace Rist operating line encompasses several aspects, including the reaction process of O introduced by the blast furnace airflow with the combustion gas produced from fuel, the direct reduction process of C with alloying elements, the direct reduction process of iron oxides with C, and the indirect reduction process of iron oxides with gas. Therefore, focusing on the operating line calculation process can effectively analyze the differences in calculation results. Operating line calculations were performed on three blast furnaces of different volumes (2200m³, 2200m³, and 2200m³) at Baogang Steel. 3 3000m 3 2500m 3 This process yields the corresponding results and generates the appropriate operation line graphs. Specific operation line graphs are shown below. Figure 1 The main parameters are shown in Table 1.

[0036] Table 13 Comparison of Calculation Data for Blast Furnaces of Different Volumes

[0037]

[0038]

[0039] Based on the data in the table and graph above, comparing the operating line graphs, the ideal operating line slope for blast furnace A is 1.9096, and the actual operating line slope is 2.0828; the ideal operating line slope for blast furnace B is 1.8672, and the actual operating line slope is 1.9553; and the ideal operating line slope for blast furnace C is 1.8619, and the actual operating line slope is 1.9259. Overall, blast furnace A has the largest slope difference among the three blast furnaces, with a value of 0.173, while the slopes for blast furnaces B and C are basically similar. The main reason for this phenomenon is:

[0040] ① The difference in raw material and fuel structure leads to discrepancies in calculation results. The calculation background for blast furnace A is: the burden structure is 49% sinter + 51% pellets, while blast furnaces B and C have a normal burden structure of about 73% sinter + about 27% pellets. Since the proportion of Bayan Obo iron concentrate in the sinter of blast furnace A was not adjusted, the proportion of Bayan Obo iron concentrate in the blast furnace increases linearly with the increase of the pellet proportion, which is nearly 20 percentage points higher than that of blast furnaces B and C.

[0041] ② Differences in operating furnace type. Due to changes in the burden structure, the operating furnace type of blast furnace A was altered, resulting in higher feed grade and lower slag ratio. However, the advantages of these factors were not fully realized. Calculations show that the theoretical slag ratio of blast furnace A is approximately 300 kg / t, while that of blast furnaces B and C is 325-330 kg / t. The slag ratio of blast furnace A is 25-30 kg / t lower than that of blast furnaces B and C. However, due to factors such as changes in airflow distribution, the rolling effect of pellets on the burden surface, and increased load of harmful elements in the furnace, the pressure-to-volume relationship of blast furnace A is tighter, the airflow is reduced, and the gas utilization rate is at a relatively low level of 42%-43%. This further results in a 0.031 increase in the direct reduction degree of blast furnace compared to the average of blast furnaces B and C, a 6.2 percentage point decrease in furnace working efficiency, and a 2735 KJ / Kmol increase in other heat consumption in the high-temperature zone.

[0042] ③ Changes in air consumption per ton of iron. In actual operation line calculations, under the smelting conditions of a high proportion of pellets and a high proportion of Bayan Obo iron concentrate charged into blast furnace A, the most obvious changes in the calculated parameters are the increase in air consumption per ton of iron and the increase in the amount of carbon in the fuel before the tuyeres. Specifically, the air consumption per ton of iron is 112.5m higher than that of blast furnaces B and C. 3 The carbon combustion rate (Cb) at the blast outlet increased by approximately 25.6 kg / t.

[0043] ④ Control of blast furnace top gas composition. Among the components of blast furnace top gas, CO and CO2 content, the level of CO2 content directly affects the horizontal coordinate position of point A on the actual operation line. When the CO content is relatively stable and the CO2 content is low, the blast furnace gas utilization rate is low, XA shifts to the left. The CO2 content of blast furnace A is 1.3 percentage points lower than that of blast furnaces B and C, causing the difference between XA and XA′ to become larger, resulting in a larger slope difference.

[0044] Therefore, based on the above analysis, the reasons for the difference in fuel consumption between blast furnace A and blast furnaces B and C can be basically clarified. In the future, to improve the economic indicators of blast furnace A, efforts should start with the burden structure, appropriately adjusting the proportion of Bayan Obo iron concentrate, reducing the content of harmful elements in the blast furnace feed, stabilizing coke quality, and reasonably increasing the blast volume. Simultaneously, basic pre-furnace work should be done well to ensure the first-time opening rate of the taphole and avoid delays caused by incomplete slag and iron removal. On this basis, the blast consumption per ton of iron should be controlled to form a matching relationship between the upper and lower parts, thereby improving the utilization rate of blast furnace gas, further expanding the indirect reduction range, reducing the direct reduction degree of the blast furnace, and creating conditions for improving furnace efficiency and narrowing the slope difference.

[0045] The calculation results show that the lower the blast furnace's working efficiency, the greater its coke-saving potential, with an overall negative correlation. Based on this, and using the data in Table 1, a horizontal comparison of the parameters of blast furnaces B and C reveals slight differences in the calculation results for the two furnaces under similar raw material and fuel conditions. Blast furnace B has a theoretical fuel ratio 9 kg / t lower than blast furnace C, a furnace working efficiency 1.6 percentage points lower, other heat consumption (Q) in the high-temperature zone 814.5 KJ / Kmol higher, and a direct reduction degree 0.009 higher. This indicates that blast furnace B has greater potential for sustainable optimization under current smelting conditions. Parameter changes are shown in [see table]. Figure 4 .

[0046] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor. The transceiver, the memory, and the processor are connected via the bus. When the computer program is executed by the processor, it implements the steps in the above-described method for comparing and analyzing blast furnace smelting parameters using the Rist operating line. Compared with the prior art, the beneficial effects of the electronic device provided by the present invention are the same as the beneficial effects of the method for comparing and analyzing blast furnace smelting parameters using the Rist operating line described in the above technical solution, and will not be repeated here.

[0047] The present invention also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it implements the steps in the above-described method for comparing and analyzing blast furnace smelting parameters using the Rist operating line. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the method for comparing and analyzing blast furnace smelting parameters using the Rist operating line described in the above-described technical solution, and will not be repeated here.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for comparative analysis of blast furnace smelting parameters using the Rist operating line, characterized in that, include: Step 1: Calculate the data points on the blast furnace operating lines of different volumes based on the Rist operating line theory; Step 2: Draw the corresponding blast furnace operation line graph based on the data points on the blast furnace operation line of different volumes; Step 3: Analyze parameter changes based on the blast furnace operation line graph to obtain the optimization potential of fuel consumption among different blast furnaces.

2. The method for comparative analysis of blast furnace smelting parameters using the Rist operating line as described in claim 1, characterized in that, In step 1, based on the Rist operating line theory, the values ​​of points A, E, W, P, V, and U in the blast furnace operating line are calculated using the Y-axis "subtraction method".

3. The method for comparative analysis of blast furnace smelting parameters using the Rist operating line according to claim 2, characterized in that, In step 3, the slope of the actual operating line of the corresponding blast furnace is calculated based on the blast furnace operating line diagram.

4. The method for comparative analysis of blast furnace smelting parameters using the Rist operating line according to claim 3, characterized in that, In step 3, the slopes of the actual operating lines of different blast furnaces are compared with the slopes of the ideal operating lines to find the reasons for the discrepancies in blast furnace fuel consumption.

5. A system for comparative analysis of blast furnace smelting parameters using the Rist operating line, characterized in that, include: The data point calculation module is used to calculate various data points on the blast furnace operating lines of different volumes based on the Rist operating line theory. The parameter calculation module is used to draw the corresponding blast furnace operation line graph based on various data points on the blast furnace operation line of different volumes. The fuel consumption optimization potential determination module is used to analyze parameter changes based on the blast furnace operation line graph to obtain the optimization potential of fuel consumption among different blast furnaces.

6. An electronic device comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, characterized in that, When the computer program is executed by the processor, it implements the steps in the method for comparative analysis of blast furnace smelting parameters using the Rist operating line as described in any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps in the method for comparative analysis of blast furnace smelting parameters using the Rist operating line as described in any one of claims 1-4.

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