Comprehensive evaluation method for high-temperature metallurgical performance of vanadium-titanium sinter for blast furnace

Abstract

The invention provides a comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for a blast furnace, and belongs to the technical field of steel smelting. Carrying out dimensionless grading treatment on the data of the tested sample; establishing a comprehensive evaluation index H of the high-temperature metallurgical performance, the calcium ferrite content w of the vanadium-titanium sinter, the total indirect reduction degree sigma Ri, the air permeability characteristic value Da of a melting zone, the soft melting temperature interval delta Ts and the melting finishing temperature Tm; evaluating the high-temperature metallurgical performance of the to-be-measured vanadium-titanium sinter according to the H value; a plurality of key parameters such as the calcium ferrite content, the total indirect reduction degree, the melting zone air permeability characteristic value, the soft melting temperature interval and the melting finishing temperature are introduced, and after dimensionless grading is conducted, a comprehensive evaluation index H is established, so that the high-temperature metallurgical performance of the vanadium-titanium sinter is comprehensively reflected, and the high-temperature metallurgical performance of the vanadium-titanium sinter is improved. The problem that complex reaction conditions in the blast furnace are difficult to accurately reflect by a traditional method is solved.

Description

Technical Field

[0001] This invention belongs to the field of iron and steel smelting technology, specifically relating to a comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces. Background Technology

[0002] Vanadium-titanium magnetite is a commensal mineral composed mainly of iron, vanadium, and titanium, along with other valuable elements. In blast furnace smelting, vanadium-titanium sinter is produced by sintering vanadium-titanium magnetite with other minerals. The smelting characteristics of vanadium-titanium sinter differ significantly from those of ordinary ores. During its reduction process, it easily generates titanium-containing minerals that are difficult to reduce, which restricts the indirect reduction efficiency in the upper part of the blast furnace. At the same time, titanium oxides slow down the reduction process of iron oxides, while oxides such as vanadium and chromium are reduced in large quantities during the softening and dripping process and between slag and iron. This leads to a downward shift of the softening zone, decreased permeability, and the formation of high-melting-point Ti(C,N) solid solutions, which in turn causes a series of problems such as viscous slag, difficulty in slag-iron separation, and poor dripping.

[0003] Currently, the evaluation standards for the high-temperature metallurgical performance of vanadium-titanium sinter generally employ methods such as the determination of iron ore reducibility, the determination of iron ore reducibility under blast furnace load, and the determination of iron ore high-temperature load reduction softening dripping performance. These methods evaluate the shape and permeability of the softening zone by obtaining temperature and pressure difference to characterize the changes in physical morphology. However, current evaluation standards focus on characterizing the local phenomena of vanadium-titanium ore reduction softening characteristics, neglecting the interactions between different reactions in the system under blast furnace reduction conditions to drive the gradual dynamic migration and transformation of valuable metals. Furthermore, they neglect to further consider the process of unsteady-state chemical reactions and their macro / microscopic characteristics.

[0004] Therefore, existing measurement methods are difficult to accurately reflect the complex reaction conditions inside the blast furnace and are not suitable for performance evaluation of vanadium-titanium sinter. Summary of the Invention

[0005] Based on the above-mentioned technical problems, the purpose of this invention is to provide a comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces. By introducing multiple key parameters such as calcium ferrite content, total indirect reduction degree, characteristic value of permeability in the melting zone, softening temperature range, and melting end temperature, and after performing dimensionless classification, a comprehensive evaluation index H is established, thereby comprehensively reflecting the high-temperature metallurgical performance of vanadium-titanium sinter and solving the problem that traditional methods are difficult to accurately reflect the complex reaction conditions inside the blast furnace.

[0006] The specific technical solution is as follows: A comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces includes the following steps: S1: Select the vanadium-titanium sinter to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter. w Total indirect reduction degree ΣR iThe characteristic value of air permeability in the molten zone, D a Softening temperature range ΔTs, melting end temperature T m ; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w │, Total indirect reduction degree│ΣR i │, Characteristic value of air permeability in the molten zone│D a │, softening temperature range│ΔT s │, Melting end temperature│T m │; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Wherein, K1 is the influence coefficient of calcium ferrite content on the high-temperature metallurgical properties of sinter, K2 is the influence coefficient of total indirect reduction degree on the high-temperature metallurgical properties of sinter, K3 is the influence coefficient of the permeability characteristic value of the melting zone on the high-temperature metallurgical properties of sinter, K4 is the influence coefficient of the softening temperature range on the high-temperature metallurgical properties of sinter, and K5 is the influence coefficient of the melting end temperature on the high-temperature metallurgical properties of sinter. S4: Evaluate the quality of the high-temperature metallurgical properties of the vanadium-titanium sinter to be tested based on the H value.

[0007] In addition, the comprehensive evaluation method for high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces provided by the present invention may also have the following additional technical features: In the above technical solution, the iron grade TFe of vanadium-titanium sinter is 48-60%, the TiO2 content is 1-10%, the basicity R is 1.7-2.5, and the reducibility RI is 60-85%.

[0008] In the above technical solution, in step S3, the values ​​of K1 are 0.1-0.2, K2 are 0.2-0.3, K3 are 0.2-0.3, K4 are 0.1-0.2, and K5 are 0.1-0.2.

[0009] In the above technical solution, K1 = 1 - K2 - K3 - K4 - K5.

[0010] The present invention provides a comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces. Compared with the prior art, the beneficial effects are as follows: 1. This invention breaks through the limitations of existing technologies that only focus on local phenomena. By introducing key parameters such as calcium ferrite content, total indirect reduction degree, characteristic value of permeability in the melting zone, softening temperature range, and melting end temperature, a comprehensive and systematic evaluation system is established. This system can accurately reflect the interaction between different reactions under blast furnace reduction conditions and solves the problem of existing evaluation methods neglecting the interaction between reactions.

[0011] 2. By calcium ferrite content w Total indirect reduction degree ΣR i These indicators effectively reflect the dynamic migration and transformation process of valuable metals such as iron and titanium in vanadium-titanium sinter during blast furnace reduction, thus making up for the shortcomings of existing technologies that neglect the dynamic migration and transformation of valuable metals.

[0012] 3. Characteristic value D of air permeability in the molten zone a Softening temperature range ΔTs, melting end temperature T m These indicators comprehensively characterize the unsteady-state chemical reactions of vanadium-titanium sinter under blast furnace reducing conditions and its macro / micro characteristics, solving the problem that existing technologies only focus on physical morphological changes while neglecting the chemical reaction process.

[0013] 4. By establishing a comprehensive evaluation index H for high-temperature metallurgical performance, the actual metallurgical behavior of vanadium-titanium sinter in the blast furnace can be accurately reflected. This allows steel companies to estimate the complex reaction conditions in the blast furnace based on the evaluation results, which is beneficial for guiding steel companies to make reasonable batching based on the current status of vanadium-titanium ore, which is conducive to the smooth operation of the blast furnace, improving metal recovery rate and reducing blast furnace energy consumption. Attached Figure Description

[0014] Figure 1 This is a flowchart of a comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces, according to the present invention. Detailed Implementation

[0015] The following are specific implementation cases and appendices. Figure 1 The present invention will be further described, but the present invention is not limited to these embodiments. Example 1:

[0016] A comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces includes the following steps: S1: Select the vanadium-titanium sinter to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter. w Total indirect reduction degree ΣR i The characteristic value of air permeability in the molten zone, D a Softening temperature range ΔTs, melting end temperature T m ; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w │, Total indirect reduction degree│ΣR i │, Characteristic value of air permeability in the molten zone│D a │, softening temperature range│ΔT s │, Melting end temperature│T m │; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Wherein, K1 is the influence coefficient of calcium ferrite content on the high-temperature metallurgical properties of sinter, K2 is the influence coefficient of total indirect reduction degree on the high-temperature metallurgical properties of sinter, K3 is the influence coefficient of the permeability characteristic value of the melting zone on the high-temperature metallurgical properties of sinter, K4 is the influence coefficient of the softening temperature range on the high-temperature metallurgical properties of sinter, and K5 is the influence coefficient of the melting end temperature on the high-temperature metallurgical properties of sinter. S4: Evaluate the quality of the high-temperature metallurgical properties of the vanadium-titanium sinter to be tested based on the H value.

[0017] When H≥4, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is Grade I; when 3≤H<4, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is Grade II; when H<3, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is unqualified.

[0018] The dimensionless classification process is as follows: w When ≥20%, | w | 5; 20% > w When ≥15%, | w | 4; 15% > w When ≥10%, | w | 3; 10% > w When ≥5%, | w | is 2; w When <5%, | w | is 1; ΣR i When ≥80%, |ΣR i | is 5; 80% > ΣR i When ≥75%, |ΣR i | is 4; 75% > ΣR i When ≥70%, |ΣR i | is 3; 70% > ΣRi When ≥65%, |ΣR i | is 2; ΣR i When <65%, |ΣR i | is 1; D a ≥6.0 kPa·K·mm -1 At that time, |D a | is 5; 6.0 kPa·K·mm -1 >D a ≥4.5 kPa·K·mm -1 At that time, |D a | is 4; 4.5 kPa·K·mm -1 >D a ≥3.0 kPa·K·mm -1 At that time, |D a | is 3; 3.0 kPa·K·mm -1 >D a ≥1.5 kPa·K·mm -1 Time | D a | is 2, D a <1.5 kPa·K·mm -1 Time | D a | is 1; 250℃≥ΔT s When >200℃, |ΔT s | is 5; 200℃≥ΔT s When >150℃, |ΔT s | is 4; 300℃≥ΔT s When >250℃, |ΔT s | is 3; 350℃≥ΔT s When >300℃, |ΔT s | is 2; ΔT s For other temperatures, |ΔT s | is 1; T m At ≤1650℃, |T m | is 5; 1700℃≥T m When >1650℃, |T m | is 4; 1750℃≥T m When >1700℃, |T m | is 3; 1800℃≥T m When the temperature is greater than 1750℃, |T m | is 2; T m When >1800℃, |T m | is 1.

[0019] This invention breaks through the limitations of existing technologies that only focus on local phenomena. By introducing key parameters such as calcium ferrite content, total indirect reduction degree, characteristic value of permeability in the melting zone, softening temperature range, and melting end temperature, a comprehensive and systematic evaluation system is established. This system can accurately reflect the interaction between different reactions under blast furnace reduction conditions and solves the problem of existing evaluation methods neglecting the interaction between reactions.

[0020] Based on calcium ferrite content w Total indirect reduction degree ΣR i These indicators effectively reflect the dynamic migration and transformation process of valuable metals such as iron and titanium in vanadium-titanium sinter during blast furnace reduction, thus making up for the shortcomings of existing technologies that neglect the dynamic migration and transformation of valuable metals.

[0021] The characteristic value D of the air permeability of the molten zone a Softening temperature range ΔTs, melting end temperature T m These indicators comprehensively characterize the unsteady-state chemical reactions of vanadium-titanium sinter under blast furnace reducing conditions and its macro / micro characteristics, solving the problem that existing technologies only focus on physical morphological changes while neglecting the chemical reaction process.

[0022] By establishing a comprehensive evaluation index H for high-temperature metallurgical performance, the actual metallurgical behavior of vanadium-titanium sinter in the blast furnace can be accurately reflected. This allows steel companies to infer the complex reaction conditions inside the blast furnace based on the evaluation results. It is beneficial for steel companies to make reasonable batching based on the current status of vanadium-titanium ore, which is conducive to the smooth operation of the blast furnace, improving metal yield and reducing blast furnace energy consumption.

[0023] In the embodiments of the present invention, the vanadium-titanium sinter has an iron grade TFe of 48-60%, a TiO2 content of 1-10%, an alkalinity R of 1.7-2.5, and a reducibility RI of 60-85%.

[0024] In an embodiment of the present invention, in step S3, the values ​​of K1 are 0.1-0.2, K2 are 0.2-0.3, K3 are 0.2-0.3, K4 are 0.1-0.2, and K5 are 0.1-0.2.

[0025] The values ​​of K1, K2, K3, K4 and K5 are determined based on the actual size of the blast furnace. The larger the blast furnace volume, the smaller K1 and K2 are, and the larger K3, K4 and K5 are.

[0026] In an embodiment of the present invention, K1 = 1 - K2 - K3 - K4 - K5. Example 2:

[0027] In this embodiment, the vanadium-titanium sinter 1 is evaluated according to the method in Example 1. The specific steps are as follows.

[0028] S1: Select vanadium-titanium sinter 1 to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter 1. w The total indirect reduction degree ΣR is 4.67. i The characteristic value of air permeability in the molten zone is 70.39. a The value is 2.67, the softening temperature range ΔTs is 348, and the melting end temperature T m It is 1675; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w | is 2, total indirect reduction degree | ΣR i |3 represents the characteristic value of air permeability in the molten zone|D a | ΔTs = 2, softening temperature range | ΔTs = 2, melting end temperature | T m | is 4; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Wherein, K1 is the influence coefficient of calcium ferrite content on the high-temperature metallurgical properties of sinter, with a value of 0.2; K2 is the influence coefficient of total indirect reduction degree on the high-temperature metallurgical properties of sinter, with a value of 0.2; K3 is the influence coefficient of the characteristic value of permeability in the melting zone on the high-temperature metallurgical properties of sinter, with a value of 0.2; K4 is the influence coefficient of softening temperature range on the high-temperature metallurgical properties of sinter, with a value of 0.2; K5 is the influence coefficient of melting end temperature on the high-temperature metallurgical properties of sinter, with a value of 0.2. Therefore, H = 2 × 0.2 + 3 × 0.2 + 2 × 0.2 + 2 × 0.2 + 4 × 0.2 = 2.6 S4: The high-temperature metallurgical properties of the vanadium-titanium sinter to be tested are evaluated based on the H value. If the H value is less than 3, the high-temperature metallurgical properties of the vanadium-titanium sinter to be tested are unqualified.

[0029] In an embodiment of the present invention, the vanadium-titanium sinter 1 has an iron content of 49.98% (TFe), a TiO2 content of 9.63%, an basicity (R) of 2.50, and a reducibility (RI) of 70.85%. Example 3:

[0030] In this embodiment, the vanadium-titanium sinter 2 is evaluated according to the method in Example 1. The specific steps are as follows: S1: Select vanadium-titanium sinter 2 to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter 2. wThe total indirect reduction degree ΣR is 21.07. i The characteristic value of air permeability in the molten zone is 72.15. a The value is 5.69, the softening temperature range ΔTs is 257, and the melting end temperature T m It is 1738; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w │ is 5, total indirect reduction degree │ΣR i | 4 represents the characteristic value of air permeability in the molten zone | D a | 4 represents the softening temperature range | ΔTs | 4 represents the melting end temperature | T m | is 4; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Where K1 is 0.2; K2 is 0.25; K3 is 0.25; K4 is 0.2; and K5 is 0.1; Therefore, H = 5 × 0.2 + 4 × 0.25 + 4 × 0.25 + 4 × 0.2 + 3 × 0.1 = 4.1 S4: The high-temperature metallurgical performance of the vanadium-titanium sinter 2 to be tested is evaluated based on the H value. If the H value is greater than 3, the high-temperature metallurgical performance of the vanadium-titanium sinter 2 to be tested is classified as Grade I.

[0031] In the embodiments of the present invention, the vanadium-titanium sinter 2 has an iron grade TFe of 58.74%, a TiO2 content of 1.86%, an basicity R of 2.07, and a reducibility RI of 73.69%. Example 4:

[0032] In this embodiment, the vanadium-titanium sinter 3 is evaluated according to the method in Example 1. The specific steps are as follows: S1: Select vanadium-titanium sinter 3 to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter 3. w The total indirect reduction degree ΣR is 15.38. i The characteristic value of air permeability in the molten zone is 79.69. a The value is 3.56, the softening temperature range ΔTs is 283, and the melting end temperature T m It is 1750; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w| is 4, total indirect reduction degree | ΣR i | 4 represents the characteristic value of air permeability in the molten zone | D a | ΔTs is 3, the softening temperature range | ΔTs is 3, the melting end temperature | T m | is 3; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Where K1 is 0.15; K2 is 0.2; K3 is 0.25; K4 is 0.2; and K5 is 0.2. Therefore, H = 4 × 0.15 + 4 × 0.2 + 3 × 0.25 + 3 × 0.2 + 3 × 0.2 = 3.35 S4: The high-temperature metallurgical properties of the vanadium-titanium sinter to be tested are evaluated based on the H value. If the H value is greater than or equal to 3 and less than 4, the high-temperature metallurgical properties of the vanadium-titanium sinter to be tested are classified as Grade II.

[0033] The vanadium-titanium sinter 3 in this embodiment of the invention has an iron content of 57.57% (TFe), a TiO2 content of 3.96%, an basicity (R) of 1.96, and a reducibility (RI) of 76.26%. Example 5:

[0034] In this embodiment, the vanadium-titanium sinter 4 is evaluated according to the method in Example 1. The specific steps are as follows: S1: Select vanadium-titanium sinter 4 to be tested, and determine the calcium ferrite content of the vanadium-titanium sinter 4. w The total indirect reduction degree ΣR is 11.26. i The characteristic value of air permeability in the molten zone is 75.36. a The value is 3.91, the softening temperature range ΔTs is 315, and the melting end temperature T m It is 1762; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w | is 3, total indirect reduction degree | ΣR i | 4 represents the characteristic value of air permeability in the molten zone | D a | ΔTs is 3, the softening temperature range | ΔTs is 2, the melting end temperature | T m | is 3; S3: Establish the comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Where K1 is 0.2; K2 is 0.3; K3 is 0.2; K4 is 0.2; and K5 is 0.1; Therefore, H = 3 × 0.2 + 4 × 0.3 + 3 × 0.2 + 2 × 0.2 + 3 × 0.1 = 3.1 S4: The high-temperature metallurgical properties of the vanadium-titanium sinter 4 to be tested are evaluated based on the H value. If the H value is greater than or equal to 3 and less than 4, the high-temperature metallurgical properties of the vanadium-titanium sinter 4 to be tested are classified as Grade II.

[0035] The vanadium-titanium sinter 4 in this embodiment of the invention has an iron content of 50.24% (TFe), a TiO2 content of 7.98%, an basicity (R) of 1.75, and a reducibility (RI) of 79.38%. Example 6:

[0036] The calcium ferrite content in Examples 1-5 was determined using a PANalytical Axios Max X-ray fluorescence spectrometer (XRF). The total indirect reduction degree ΣRi and the characteristic value of the molten zone permeability D were also measured. a Softening temperature range ΔT s and melting end temperature T m The results were obtained using the USTL03 ​​type mineral coke couple performance testing device.

[0037]

[0038]

[0039] This invention, through multiple rounds of consultation and analysis of hundreds of experimental data and on-site blast furnace technical indicators using the Delphi method, ultimately determined the grading criteria for H values, including: vanadium-titanium sinter 1 at 2000m... 3 After the first-stage blast furnace was put into use, its utilization coefficient was 1.97 t / (m³). 3 / d), fuel ratio is 520 kg / t; vanadium-titanium sinter 2 at 2000m 3 After the first-stage blast furnace was put into use, its utilization coefficient was 2.20 t / (m³). 3 / d), with a fuel ratio of 485 kg / t. Vanadium-titanium sinter 3 at 2000m 3 After the first-stage blast furnace is put into use, its utilization coefficient is 2.10 t / (m³). 3 / d), fuel ratio is 508 kg / t; vanadium-titanium sinter 4 at 2000m 3After the blast furnace is put into use, the utilization coefficient is 2.12t / (m³). 3 / d), with a fuel ratio of 511 kg / t.

[0040] Based on the correlation analysis between the above data and blast furnace smelting indicators, and combined with the Delphi method, it was determined that when H≥4, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is Grade I; when 3≤H<4, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is Grade II; and when H<3, the high-temperature metallurgical performance of the vanadium-titanium sinter to be tested is unqualified.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces, characterized in that, Includes the following steps: S1: Select the vanadium-titanium sinter to be tested, wherein the calcium ferrite content of the vanadium-titanium sinter is... w Total indirect reduction degree ΣR i The characteristic value of air permeability in the molten zone, D a Softening temperature range ΔTs, melting end temperature T m ; S2: Perform dimensionless fractionation processing on the measured sample data. The resulting dimensionless fractionated calcium ferrite content is shown below. w │, Total indirect reduction degree│ΣR i │, Characteristic value of air permeability in the molten zone│D a │, softening temperature range│ΔT s │, Melting end temperature│T m │; S3: Establish a comprehensive evaluation index H for high-temperature metallurgical performance. The mathematical expression for the comprehensive evaluation index H for high-temperature metallurgical performance is as follows: H=│ w │×K1+│ΣR i │×K2+│D a │×K3+│ΔT s │×K4+│T m │×K5 Wherein, K1 is the influence coefficient of calcium ferrite content on the high-temperature metallurgical properties of sinter, K2 is the influence coefficient of total indirect reduction degree on the high-temperature metallurgical properties of sinter, K3 is the influence coefficient of the permeability characteristic value of the melting zone on the high-temperature metallurgical properties of sinter, K4 is the influence coefficient of the softening temperature range on the high-temperature metallurgical properties of sinter, and K5 is the influence coefficient of the melting end temperature on the high-temperature metallurgical properties of sinter. S4: Evaluate the quality of the high-temperature metallurgical properties of the vanadium-titanium sinter to be tested based on the H value.

2. The comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces according to claim 1, characterized in that, The vanadium-titanium sinter has an iron content of 48-60% (TFe), a TiO2 content of 1-10%, an alkalinity (R) of 1.7-2.5, and a reducibility (RI) of 60-85%.

3. The comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces according to claim 1, characterized in that, In step S3, the values ​​of K1, K2, K3, K4, and K5 are 0.1-0.

2.

4. The comprehensive evaluation method for the high-temperature metallurgical performance of vanadium-titanium sinter for blast furnaces according to claim 1, characterized in that, K1 = 1 - K2 - K3 - K4 - K5.

Images