Blast furnace slagging system based on magnesium-aluminum ratio optimization

Abstract

The invention relates to the technical field of blast furnace slagging systems, and discloses a blast furnace slagging system based on magnesium-aluminum ratio optimization. According to the blast furnace slagging system based on magnesium-aluminum ratio optimization, spectral data and real-time oxygen concentration data of blast furnace slag are collected in real time, the spectral data are analyzed to calculate the magnesium content and the aluminum content in residues, after the magnesium content and the aluminum content in the residues are obtained through calculation, the magnesium-aluminum ratio is calculated according to the two data, the magnesium-aluminum ratio is compared with a magnesium-aluminum ratio threshold value, and the magnesium-aluminum ratio is calculated. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold value, the blast furnace data analysis unit calculates an oxygen concentration mean value, compares the oxygen concentration mean value with the oxygen concentration threshold value, judges whether the oxygen concentration is abnormal or not, and judges the reason of insufficient magnesium-aluminum reaction in the blast furnace according to the combination of the abnormal oxygen concentration and the abnormal magnesium-aluminum ratio; oxygen or magnesium-aluminum solids are supplemented to the blast furnace in time, so that accurate online monitoring is provided, the magnesium-aluminum reaction in the blast furnace is more stable, and the stability and the metal recovery rate of the blast furnace are improved.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace slag making systems, and in particular to a blast furnace slag making system based on magnesium-aluminum ratio optimization. Background Art

[0002] Blast furnace is the core equipment of steel production. By optimizing the magnesium-aluminum ratio in slag, the operation efficiency, product quality and environmental benefits of blast furnace can be significantly improved. Adding magnesium and aluminum during the ironmaking process, especially optimizing the magnesium-aluminum ratio, can significantly improve the physical and chemical properties of slag, improve the operating efficiency of blast furnaces, reduce energy consumption, improve the quality of pig iron, and extend the service life of equipment. These optimization methods are widely used in modern blast furnace smelting processes, greatly promoting technological progress and production efficiency improvement in the steel industry.

[0003] At present, the traditional method of determining slag formula often relies on experience and lacks accurate online monitoring technology, which makes it difficult to maintain a stable composition ratio in actual production, thus affecting the stability of the blast furnace and the metal recovery rate. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a blast furnace slag-making system based on magnesium-aluminum ratio optimization, which has the function of collecting spectral data and real-time oxygen concentration data of blast furnace slag in real time, analyzing the spectral data to calculate the magnesium content and aluminum content in the residue, and after calculating the magnesium content and aluminum content in the residue, calculating the magnesium-aluminum ratio according to the two data, and comparing it with the magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the oxygen concentration mean, and compares the oxygen concentration mean with the oxygen concentration threshold to determine whether the oxygen concentration is abnormal, and determines the cause of insufficient magnesium-aluminum reaction in the blast furnace based on the abnormal oxygen concentration and the abnormal magnesium-aluminum ratio, and timely supplements oxygen or magnesium-aluminum solids to the blast furnace, thereby providing accurate online monitoring, making the magnesium-aluminum reaction in the blast furnace more stable, improving the stability of the blast furnace and the metal recovery rate, etc., and solving the above-mentioned problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: a blast furnace slag making system based on magnesium-aluminum ratio optimization, comprising a slag sample data acquisition unit, an oxygen concentration acquisition unit, a blast furnace data analysis unit and a control unit; The slag sample data collection unit is used to collect spectral data of the residue at the slag outlet of the blast furnace. The slag sample data collection unit collects several groups of spectral data and sends the spectral data to the blast furnace data analysis unit; The oxygen concentration collection unit is used to collect real-time oxygen concentration data in the blast furnace, and send the collected multiple real-time oxygen concentration data to the blast furnace data analysis unit; The blast furnace data analysis unit calculates the magnesium content in the residue according to the magnesium spectrum line data, and the blast furnace data analysis unit calculates the aluminum content in the residue according to the aluminum spectrum line data. After the magnesium content and the aluminum content are calculated, the blast furnace data analysis unit calculates the magnesium-aluminum ratio according to the magnesium content and the aluminum content, and compares the calculated magnesium-aluminum ratio with a preset magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the average oxygen concentration in the furnace according to the received multiple real-time oxygen concentration data, and compares the calculated oxygen concentration average with the corresponding threshold. When the oxygen concentration average is lower than the oxygen concentration threshold, the blast furnace data analysis unit generates an oxygen increase signal and sends the oxygen increase signal to the control unit. When the oxygen concentration average is not lower than the oxygen concentration threshold, the blast furnace data analysis unit determines that the amount of magnesium and aluminum is insufficient, generates a filling signal, and sends the filling signal to the control unit. When the control unit receives an oxygen increase signal, the control unit controls the blast furnace air intake system to add oxygen to the blast furnace. When the control unit receives a filler signal, the control unit controls the blast furnace feeding device to add magnesium and aluminum solids into the blast furnace.

[0006] Preferably, the calculation expression of magnesium content in the residue is as follows: ; In the formula, Mhl represents the magnesium content in the residue, mqd represents the magnesium spectrum line intensity, mjj represents the intercept of the magnesium spectrum line curve, mxl represents the slope of the magnesium spectrum line curve, and the intercept mjj of the magnesium spectrum line curve and the slope mxl of the magnesium spectrum line curve are existing experimental data.

[0007] Preferably, the magnesium spectral line intensity mqd calculation expression is as follows: ; In the formula, mxs represents the calibration coefficient of the slope of the magnesium spectrum curve, which is known data obtained from experiments.

[0008] Preferably, the calculation expression of the aluminum content in the residue is as follows: ; In the formula, Lhl represents the aluminum content in the residue, lqd represents the aluminum spectrum line intensity, ljj represents the intercept of the aluminum spectrum line curve, lxl represents the slope of the aluminum spectrum line curve, and the intercept ljj of the aluminum spectrum line curve and the slope lxl of the aluminum spectrum line curve are existing experimental data.

[0009] Preferably, the calculation expression of the aluminum line intensity lqd is as follows: ; In the formula, lxs represents the calibration coefficient of the slope of the aluminum spectrum line curve, which is known data obtained from experiments.

[0010] Preferably, the oxygen concentration mean calculation expression is as follows: ; In the formula, yq represents the real-time oxygen concentration data, yq1, yq2, ..., yq n , represents the multiple real-time oxygen concentration data collected, n represents the number of multiple real-time oxygen concentration data, Indicates the mean oxygen concentration.

[0011] Preferably, the magnesium-aluminum ratio calculation expression is: ; In the formula, bl is expressed as the magnesium-aluminum ratio.

[0012] Preferably, the magnesium-aluminum ratio threshold is represented by blyz, and the oxygen concentration threshold is represented by .

[0013] Preferably, the oxygenation signal generation step is as follows: A1. When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; A2. When the average oxygen concentration Below oxygen concentration threshold When the blast furnace data analysis unit determines that insufficient oxygen causes an abnormal magnesium-aluminum ratio; A3. The blast furnace data analysis unit generates an oxygen increase signal.

[0014] Preferably, the filler signal generating step is as follows: B1. When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; B2. When the average oxygen concentration Greater than or equal to the oxygen concentration threshold At this time, the blast furnace data analysis unit judged that there was sufficient oxygen and the magnesium-aluminum content was abnormal, resulting in an abnormal magnesium-aluminum ratio; B3. The blast furnace data analysis unit generates a filler signal.

[0015] Compared with the prior art, the present invention provides a blast furnace slag making system based on magnesium-aluminum ratio optimization, which has the following beneficial effects: The present invention collects spectral data and real-time oxygen concentration data of blast furnace slag in real time, analyzes the spectral data to calculate the magnesium content and aluminum content in the residue, and after the magnesium content and aluminum content in the residue are calculated, the magnesium-aluminum ratio is calculated according to the two data, and the ratio is compared with the magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the oxygen concentration mean, and compares the oxygen concentration mean with the oxygen concentration threshold to determine whether the oxygen concentration is abnormal, and determines the cause of insufficient magnesium-aluminum reaction in the blast furnace based on the abnormal oxygen concentration and the abnormal magnesium-aluminum ratio, and timely supplements oxygen or magnesium-aluminum solids to the blast furnace, thereby providing accurate online monitoring, making the magnesium-aluminum reaction in the blast furnace more stable, and improving the stability of the blast furnace and the metal recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 A blast furnace slag-making system based on magnesium-aluminum ratio optimization is disclosed. The system consists of a slag sample data acquisition unit, an oxygen concentration acquisition unit, a blast furnace data analysis unit and a control unit.

[0019] The slag sample data collection unit is used to collect spectral data of the residue at the slag outlet of the blast furnace. The slag sample data collection unit collects several groups of spectral data and sends the spectral data to the blast furnace data analysis unit.

[0020] The oxygen concentration collection unit is used to collect real-time oxygen concentration data in the blast furnace, and send the collected multiple real-time oxygen concentration data to the blast furnace data analysis unit.

[0021] The blast furnace data analysis unit calculates the magnesium content in the residue based on the magnesium spectrum data. The calculation expression is as follows: ; In the formula, Mhl represents the magnesium content in the residue, mqd represents the magnesium spectrum line intensity, mjj represents the intercept of the magnesium spectrum line curve, mxl represents the slope of the magnesium spectrum line curve, and the intercept mjj of the magnesium spectrum line curve and the slope mxl of the magnesium spectrum line curve are existing experimental data.

[0022] The calculation expression of the above magnesium line intensity mqd is as follows: ; In the formula, mxs represents the calibration coefficient of the slope of the magnesium spectrum curve, which is known data obtained from experiments.

[0023] The blast furnace data analysis unit calculates the aluminum content in the residue based on the aluminum spectrum data. The calculation expression is as follows: ; In the formula, Lhl represents the aluminum content in the residue, lqd represents the intensity of the aluminum spectrum line, ljj represents the intercept of the aluminum spectrum line curve, lxl represents the slope of the aluminum spectrum line curve, and the intercept ljj of the aluminum spectrum line curve and the slope lxl of the aluminum spectrum line curve are existing experimental data;

[0024] The calculation expression of the above aluminum line intensity lqd is as follows: ; In the formula, lxs represents the calibration coefficient of the slope of the aluminum spectrum line curve, which is known data obtained from experiments.

[0025] The blast furnace data analysis unit calculates the average oxygen concentration in the furnace based on the received multiple real-time oxygen concentration data. The calculation expression is as follows: ; In the formula, yq represents the real-time oxygen concentration data, yq1, yq2, ..., yq n , represents the multiple real-time oxygen concentration data collected, n represents the number of multiple real-time oxygen concentration data, Indicates the mean oxygen concentration.

[0026] The blast furnace data analysis unit calculates the magnesium-aluminum ratio based on the magnesium content and the aluminum content. The calculation expression is as follows: ; In the formula, bl is expressed as the magnesium-aluminum ratio.

[0027] After the magnesium-aluminum ratio is calculated, the blast furnace data analysis unit compares the calculated magnesium-aluminum ratio with the preset magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the average oxygen concentration in the furnace according to the received multiple real-time oxygen concentration data, and compares the calculated oxygen concentration average with the corresponding threshold. When the oxygen concentration average is lower than the oxygen concentration threshold, the blast furnace data analysis unit generates an oxygen increase signal and sends the oxygen increase signal to the control unit. When the oxygen concentration average is not lower than the oxygen concentration threshold, the blast furnace data analysis unit determines that the amount of magnesium and aluminum is insufficient, generates a filling signal, and sends the filling signal to the control unit. The specific determination method is as follows: The steps to generate the oxygenation signal are as follows: Step 1: When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; Step 2: When the oxygen concentration is average Below oxygen concentration threshold When the blast furnace data analysis unit determines that insufficient oxygen causes an abnormal magnesium-aluminum ratio; Step 3: The blast furnace data analysis unit generates an oxygen increase signal.

[0028] The steps to generate the filler signal are as follows: Step 1: When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; Step 2: When the oxygen concentration is Greater than or equal to the oxygen concentration threshold At this time, the blast furnace data analysis unit judged that there was sufficient oxygen and the magnesium-aluminum content was abnormal, resulting in an abnormal magnesium-aluminum ratio; Step 3: The blast furnace data analysis unit generates a filler signal.

[0029] When the oxygen increase signal or the filling signal is generated, the blast furnace data analysis unit sends the oxygen increase signal or the filling signal to the control unit. When the control unit receives the oxygen increase signal, the control unit controls the blast furnace air intake system to add oxygen to the blast furnace, adds oxygen into the blast furnace, and improves the combustion effect. When the control unit receives the filling signal, the control unit controls the blast furnace feeding device to add magnesium and aluminum solids into the blast furnace, thereby adding magnesium and aluminum solids into the furnace, so that the magnesium and aluminum solids in the blast furnace are in a sufficient state, avoiding insufficient magnesium and aluminum solids, which leads to unstable reactions in the blast furnace.

[0030] By collecting the spectral data and real-time oxygen concentration data of blast furnace slag in real time, and analyzing the spectral data to calculate the magnesium content and aluminum content in the residue, after calculating the magnesium content and aluminum content in the residue, the magnesium-aluminum ratio is calculated based on these two data, and compared with the magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the average oxygen concentration, and compares the average oxygen concentration with the oxygen concentration threshold to determine whether the oxygen concentration is abnormal, and based on the abnormal oxygen concentration and the abnormal magnesium-aluminum ratio, the cause of the insufficient magnesium-aluminum reaction in the blast furnace is determined, and oxygen or magnesium-aluminum solids are added to the blast furnace in time, thereby providing accurate online monitoring, making the magnesium-aluminum reaction in the blast furnace more stable, and improving the stability of the blast furnace and the metal recovery rate.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace slag making system based on magnesium-aluminum ratio optimization, characterized in that: It includes a slag sample data collection unit, an oxygen concentration collection unit, a blast furnace data analysis unit and a control unit; The slag sample data collection unit is used to collect spectral data of the residue at the slag outlet of the blast furnace. The slag sample data collection unit collects several groups of spectral data and sends the spectral data to the blast furnace data analysis unit; The oxygen concentration collection unit is used to collect real-time oxygen concentration data in the blast furnace, and send the collected multiple real-time oxygen concentration data to the blast furnace data analysis unit; The blast furnace data analysis unit calculates the magnesium content in the residue according to the magnesium spectrum line data, and the blast furnace data analysis unit calculates the aluminum content in the residue according to the aluminum spectrum line data. After the magnesium content and the aluminum content are calculated, the blast furnace data analysis unit calculates the magnesium-aluminum ratio according to the magnesium content and the aluminum content, and compares the calculated magnesium-aluminum ratio with a preset magnesium-aluminum ratio threshold. When the magnesium-aluminum ratio exceeds the magnesium-aluminum ratio threshold, the blast furnace data analysis unit calculates the average oxygen concentration in the furnace according to the received multiple real-time oxygen concentration data, and compares the calculated oxygen concentration average with the corresponding threshold. When the oxygen concentration average is lower than the oxygen concentration threshold, the blast furnace data analysis unit generates an oxygen increase signal and sends the oxygen increase signal to the control unit. When the oxygen concentration average is not lower than the oxygen concentration threshold, the blast furnace data analysis unit determines that the amount of magnesium and aluminum is insufficient, generates a filling signal, and sends the filling signal to the control unit. When the control unit receives an oxygen increase signal, the control unit controls the blast furnace air intake system to add oxygen to the blast furnace. When the control unit receives a filler signal, the control unit controls the blast furnace feeding device to add magnesium and aluminum solids into the blast furnace.

2. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 1, characterized in that: The calculation expression of magnesium content in the residue is as follows: ; In the formula, Mhl represents the magnesium content in the residue, mqd represents the magnesium spectrum line intensity, mjj represents the intercept of the magnesium spectrum line curve, mxl represents the slope of the magnesium spectrum line curve, and the intercept mjj of the magnesium spectrum line curve and the slope mxl of the magnesium spectrum line curve are existing experimental data.

3. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 2, characterized in that: The magnesium line intensity mqd calculation expression is as follows: ; In the formula, mxs represents the calibration coefficient of the slope of the magnesium spectrum curve, which is known data obtained from experiments.

4. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 3, characterized in that: The calculation expression of aluminum content in the residue is as follows: ; In the formula, Lhl represents the aluminum content in the residue, lqd represents the aluminum spectrum line intensity, ljj represents the intercept of the aluminum spectrum line curve, lxl represents the slope of the aluminum spectrum line curve, and the intercept ljj of the aluminum spectrum line curve and the slope lxl of the aluminum spectrum line curve are existing experimental data.

5. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 4, characterized in that: The calculation expression of the aluminum line intensity lqd is as follows: ; In the formula, lxs represents the calibration coefficient of the slope of the aluminum spectrum line curve, which is known data obtained from experiments.

6. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 5, characterized in that: The oxygen concentration mean value calculation expression is as follows: ; In the formula, yq represents the real-time oxygen concentration data, yq1, yq2, ..., yq n , represents the multiple real-time oxygen concentration data collected, n represents the number of multiple real-time oxygen concentration data, Indicates the mean oxygen concentration.

7. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 6, characterized in that: The magnesium-aluminum ratio calculation expression is: ; In the formula, bl is expressed as the magnesium-aluminum ratio.

8. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 7, characterized in that: The magnesium-aluminum ratio threshold is represented by blyz, and the oxygen concentration threshold is represented by .

9. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 8, characterized in that: The oxygenation signal generation steps are as follows: A1. When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; A2. When the average oxygen concentration Below oxygen concentration threshold When the blast furnace data analysis unit determines that insufficient oxygen causes an abnormal magnesium-aluminum ratio; A3. The blast furnace data analysis unit generates an oxygen increase signal.

10. A blast furnace slag making system based on magnesium-aluminum ratio optimization according to claim 9, characterized in that: The packing signal generation steps are as follows: B1. When the magnesium-aluminum ratio bl is greater than the magnesium-aluminum ratio threshold blyz or when the magnesium-aluminum ratio bl is less than the magnesium-aluminum ratio threshold blyz, the blast furnace data analysis unit converts the oxygen concentration average and oxygen concentration threshold contrast; B2. When the average oxygen concentration Greater than or equal to the oxygen concentration threshold At this time, the blast furnace data analysis unit judged that there was sufficient oxygen and the magnesium-aluminum content was abnormal, resulting in an abnormal magnesium-aluminum ratio; B3. The blast furnace data analysis unit generates a filler signal.

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