Method for rapidly eliminating dead coke compost and greatly promoting furnace condition recovery through central ore addition

Abstract

The invention relates to the technical field of central ore addition, and particularly discloses a method for quickly eliminating dead coke compost and promoting furnace condition recovery by central ore addition, which comprises the following steps: acquiring blast furnace operation state parameters in a monitoring period to obtain a blast furnace performance value BX, and judging whether a blockage phenomenon occurs in a blast furnace based on the obtained performance value BX in the blast furnace, analyzing the blast furnace performance value BX and the state value ZT of the ore to obtain an ore performance value ZY, judging whether the ore can meet the requirement of central ore addition for removing a dead coke pile or not based on the obtained ore performance value ZY, and adding the ore right above the dead coke pile to remove the dead coke pile in the blast furnace, and in the monitoring period, an ore performance value change curve is obtained by analyzing the ore adding rate and the ore performance value ZY, an ore action value ZT is obtained based on the ore performance value change curve, whether the ore adding rate influences the ore performance value ZY or not is judged based on the obtained ore action value ZT, and an influence signal is generated.

Description

Technical Field

[0001] The invention relates to the technical field of central ore adding, and in particular to a method for central ore adding to quickly eliminate dead coke compost and greatly promote furnace condition recovery. Background Art

[0002] In the industrial world, especially in the steel industry, the formation of dead coke piles during blast furnace ironmaking often troubles the smooth operation of the production line. The accumulation of dead coke piles not only leads to obstruction of blast furnace logistics, but also causes imbalance of thermal system, which directly affects production efficiency and product quality.

[0003] A Chinese patent application with publication number CN112813208A discloses an operating method for digesting the dead coke compost in a furnace, comprising the following steps: the upper charging system adopts a distribution method that reduces the load of the ore belt, with the ore belt load ≤7.0 as the benchmark; due to the large dead coke compost, the central coke amount can be controlled at 10-15%; the edge ore belt load is controlled at 4-4.5; the W value is controlled at above 0.6 in operation; air is supplied through all tuyere and the whole tuyere is evenly sprayed; the coal injection ratio is controlled at 140-150kg / t; a blast furnace with four tapholes adopts a three-taphole circulating iron-discharging mode; stable raw material and fuel support is adopted, screening is strengthened, and the ore powder ≤5mm entering the furnace is less than 1.5%; the silicon content of pig iron is controlled at 0.35-0.55%, the sulfur content of pig iron is controlled in the range of 0.025-0.4%, the slag alkalinity is adjusted, the physical heat of molten iron is ≥1510℃, and the furnace is washed with slag iron. The present invention can realize the gradual digestion of the furnace hearth on the basis of stable production and low consumption of the blast furnace.

[0004] The prior art lacks ore selection for central ore addition to remove dead coke piles, resulting in ore waste, and also lacks analysis of the effect of ore addition speed on dead coke pile removal, thus failing to ensure that ore is removed from the dead coke pile at an optimal rate.

[0005] To this end, the present invention provides a method for central ore addition to quickly eliminate dead coke compost and greatly promote furnace condition recovery. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a method for central ore addition to quickly eliminate dead coke compost and greatly promote furnace condition recovery, comprising:

[0008] Step 1: using the internal monitoring system of the blast furnace to obtain the blast furnace operation status parameters within the monitoring period, the operation status parameters include the gas pressure stability rate BD and the charge drop rate ratio XB, and obtaining the blast furnace performance value BX through the blast furnace operation status parameters, judging whether the blast furnace is blocked based on the obtained performance value BX in the blast furnace, and generating an analysis signal, which is divided into a blocking signal and a normal signal;

[0009] Step 2: Based on the generated blocking signal, the dead coke pile in the blast furnace is treated by central ore addition to eliminate the dead coke pile. The blast furnace performance value BX and the ore status value ZT are analyzed to obtain the ore performance value ZY. Based on the obtained ore performance value ZY, it is determined whether the ore can meet the requirements of central ore addition to remove the dead coke pile.

[0010] Step three: based on the requirement that the ore reaches the central ore addition to remove the dead coke pile, the ore is added directly above the dead coke pile to remove the dead coke pile in the blast furnace, and the ore performance value change curve is obtained by analyzing the ore addition rate and the ore performance value ZY during the monitoring period, and the ore action value ZT is obtained based on the ore performance value change curve, and based on the obtained ore action value ZT, it is determined whether the ore addition rate has an impact on the ore performance value ZY and an impact signal is generated, and the impact signal is divided into an adjustment signal and a maintenance signal.

[0011] As a further solution of the present invention: the blast furnace performance value BX is obtained in the following manner:

[0012] The obtained gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate are processed by the formula: The blast furnace performance value BX is obtained, where a1 and a2 are both preset proportional coefficients.

[0013] As a further solution of the present invention: the gas pressure stability rate BD is obtained in the following manner:

[0014] The pressure data in the blast furnace is obtained in real time through the pressure sensor, and then a rectangular coordinate system is established with time as the X-axis and the pressure in the blast furnace as the Y-axis. The real-time pressure in the blast furnace is marked in the rectangular coordinate system to obtain a pressure change curve in the blast furnace;

[0015] The maximum and minimum pressure values ​​during normal operation of the blast furnace are obtained through historical data. In the rectangular coordinate system, a maximum pressure reference line is made on the Y axis with the maximum pressure value as the reference point and parallel to the X axis, and it is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is made on the Y axis with the minimum pressure value as the reference point and parallel to the X axis, and it is marked as the minimum standard pressure limit line. The pressure value between the minimum standard pressure limit line and the maximum standard pressure limit line is marked as the normal pressure value, and the pressure value below the minimum standard pressure limit line and above the maximum standard pressure limit line is marked as the escape pressure value;

[0016] In the blast furnace pressure change curve, the duration of the blast furnace pressure change curve on the X-axis is counted and marked as the total time. Then, the duration of the blast furnace pressure change curve within the normal pressure value range on the X-axis is counted and marked as the normal time. The obtained normal time is ratioed to the total time to obtain the gas pressure stability rate BD.

[0017] The absolute deviation value proportion XB of the charge drop rate is obtained as follows:

[0018] Through historical data, the charge descent rate of the blast furnace under normal working conditions is obtained and marked as the normal descent rate. The current descent rate of the blast furnace charge is obtained, and the difference between it and the normal descent rate is first taken and then the absolute value is taken to obtain the absolute deviation value of the charge descent rate in the blast furnace. The obtained absolute deviation value of the charge descent rate in the blast furnace is ratioed with the normal descent rate to obtain the absolute deviation value proportion XB of the charge descent rate.

[0019] As a further solution of the present invention: the state value ZT of the ore is obtained as follows:

[0020] The ore screening rate SY, ore moisture content SL and ore reduction rate HY are processed by the formula: The state value ZT of the ore is obtained, wherein b1, b2 and b3 are all preset proportional coefficients.

[0021] As a further solution of the present invention: the ore screening rate SY is obtained in the following manner:

[0022] Obtain ore with a mass of M through an electronic weighing instrument, screen the obtained ore through a screening machine, weigh the mass of the ore after the screening machine completes the screening, and obtain the screened mass M1. The screened mass M1 is ratioed with the obtained ore mass M to obtain the ore screening rate SY;

[0023] The ore moisture content SL is obtained in the following manner:

[0024] Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore, mark it as the mass after drying N1, make a difference between the mass of the ore of mass N and the mass after drying N1 to get the mass of the ore after moisture removal, and make a ratio between the mass of the ore after moisture removal and the mass of the ore of mass N to get the moisture content SL of the ore.

[0025] As a further solution of the present invention: the ore reduction rate HY is obtained in the following manner:

[0026] The ore is placed in a high temperature environment and carbon monoxide with a mass of MY is introduced for reaction. Then the gas after the reaction is collected in a container of fixed volume. The concentration of carbon dioxide after the reaction is detected by a carbon dioxide detector. The mass of carbon dioxide actually produced after the reaction is obtained according to the density formula M=ρ*V, which is marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide;

[0027] Through 2CO+O 2 →2CO 2 From the reaction process of carbon monoxide turning into carbon dioxide, we can know that theoretically, equal moles of carbon monoxide are completely converted into equal moles of carbon dioxide, so through the mole formula: The theoretical mass of carbon monoxide converted into carbon dioxide is obtained and marked as theoretical mass M1, where M CO represents the molar mass of carbon monoxide, It represents the molar mass of carbon dioxide. The actual mass M obtained is ratioed with the theoretical mass M1 to obtain the ore reduction rate HY.

[0028] As a further solution of the present invention: the ore performance value ZY is obtained as follows:

[0029] The obtained ore status value ZT and blast furnace performance value BX are processed by the formula: The performance value ZY of the ore is obtained, where c1 and c2 are both preset proportional coefficients.

[0030] As a further solution of the present invention: the ore action value ZT is obtained as follows:

[0031] The obtained rising sub-segment proportion CZ and the rising sub-segment area mean difference proportion MB are processed by the formula: The ore action value ZT is obtained, where n1 and n2 are both preset proportional coefficients.

[0032] As a further solution of the present invention: the ascending sub-segment proportion CZ is obtained as follows:

[0033] Through the historical data, the ore addition rate and the ore performance value ZY corresponding to the ore addition rate are obtained, and then a rectangular coordinate system is established with the ore addition rate as the X-axis and the ore performance value as the Y-axis. The ore performance value corresponding to the ore addition rate is marked in the rectangular coordinate system to obtain the ore performance value change curve;

[0034] Based on the obtained ore performance value change curve, it is divided into several sub-segments to obtain ore performance value change curve sub-segments, which are marked as ore change sub-segments, the endpoints of the ore change sub-segment are obtained and connected to obtain the ore change sub-segment connecting line, and the endpoints of all wind speed parameter change sub-segment connecting lines are numbered as i, i=1, 2, 3...n, and the ore performance value corresponding to one of the endpoints i on the Y-axis is obtained, and the ore performance value corresponding to the adjacent endpoint i-1 on the Y-axis is subtracted to obtain the ore performance value difference, and the ore change sub-segment corresponding to the ore performance value difference greater than 0 is marked as an ascending sub-segment, the number of ascending sub-segments is counted, and the ratio is processed with the number of all ore change sub-segments to obtain the ascending sub-segment proportion CZ.

[0035] As a further solution of the present invention: the ascending sub-segment area mean difference ratio MB is obtained as follows:

[0036] Measure the area enclosed by the rising sub-segment and the X-axis, count the areas enclosed by all the rising sub-segments and the X-axis and sum them up to get the total area of ​​the rising sub-segments, take the average of the total area of ​​the rising sub-segments to get the mean area of ​​the rising sub-segments, first perform subtraction and then take the absolute value processing on the obtained mean area of ​​the rising sub-segments and the preset threshold value of the mean area of ​​the rising sub-segments to get the absolute value of the difference in the mean area of ​​the rising sub-segments, perform ratio processing on the absolute value of the difference in the mean area of ​​the rising sub-segments and the threshold value of the mean area of ​​the rising sub-segments to get the absolute value ratio of the difference in the mean area of ​​the rising sub-segments, and mark it as the ratio of the difference in the mean area of ​​the rising sub-segments MB.

[0037] Beneficial effects of the present invention:

[0038] 1. Use the blast furnace internal monitoring system to obtain the blast furnace operating status parameters during the monitoring period, and obtain the blast furnace performance value BX through the blast furnace operating status parameters. Based on the obtained performance value BX inside the blast furnace, determine whether blockage occurs in the blast furnace and generate an analysis signal. By combining the blast furnace internal monitoring system with the intelligent analysis algorithm, real-time monitoring and accurate judgment of the blast furnace operating status can be achieved, thereby ensuring the smooth operation of the blast furnace.

[0039] 2. Based on the generated blocking signal, the dead coke pile in the blast furnace is centrally added with ore to eliminate it. The blast furnace performance value BX and the ore status value ZT are analyzed to obtain the ore performance value ZY. Based on the obtained ore performance value ZY, it is determined whether the ore can meet the requirements of central addition with ore to remove the dead coke pile. By analyzing the ore performance value ZY, the operator can accurately determine whether the ore is suitable for central addition with ore treatment, ensuring that the selected ore can effectively remove the dead coke pile and avoid invalid or inefficient use of the ore.

[0040] 3. Based on the requirement that the ore reaches the central ore addition to remove the dead coke pile, the ore is added directly above the dead coke pile to remove the dead coke pile in the blast furnace. During the monitoring period, the ore addition rate and the ore performance value ZY are analyzed to obtain the ore performance value change curve. The ore action value ZT is obtained based on the ore performance value change curve. Based on the obtained ore action value ZT, it is judged whether the ore addition rate has an impact on the ore performance value ZY and an impact signal is generated. By analyzing the ore performance value change curve, the operator can accurately judge the impact of the ore addition rate on the ore performance value ZY, thereby generating an adjustment signal in time, and accurately adjusting the ore addition rate to ensure that the ore addition rate is in the best state. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] Figure 1 It is a flow chart of the steps of a method for rapidly eliminating dead coke and composting by adding ore centrally and promoting furnace condition recovery; DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] Example 1

[0045] like Figure 1 As shown, a method for central ore addition to quickly eliminate dead coke compost and greatly promote furnace condition recovery according to an embodiment of the present invention comprises:

[0046] Step 1: using the internal monitoring system of the blast furnace to obtain the blast furnace operation status parameters within the monitoring period, the operation status parameters include the gas pressure stability rate BD and the charge drop rate ratio XB, and obtaining the blast furnace performance value BX through the blast furnace operation status parameters, judging whether the blast furnace is blocked based on the obtained performance value BX in the blast furnace, and generating an analysis signal, which is divided into a blocking signal and a normal signal;

[0047] The pressure data in the blast furnace is obtained in real time through the pressure sensor, and then a rectangular coordinate system is established with time as the X-axis and the pressure in the blast furnace as the Y-axis. The real-time pressure in the blast furnace is marked in the rectangular coordinate system to obtain a pressure change curve in the blast furnace;

[0048] The maximum and minimum pressure values ​​during normal operation of the blast furnace are obtained through historical data. In the rectangular coordinate system, a maximum pressure reference line is made on the Y axis with the maximum pressure value as the reference point and parallel to the X axis, and it is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is made on the Y axis with the minimum pressure value as the reference point and parallel to the X axis, and it is marked as the minimum standard pressure limit line. The pressure value between the minimum standard pressure limit line and the maximum standard pressure limit line is marked as the normal pressure value, and the pressure value below the minimum standard pressure limit line and above the maximum standard pressure limit line is marked as the escape pressure value;

[0049] In the blast furnace pressure change curve, the duration of the blast furnace pressure change curve on the X-axis is counted and marked as the total time. Then, the duration of the blast furnace pressure change curve within the normal pressure value range on the X-axis is counted and marked as the normal time. The obtained normal time is ratioed to the total time to obtain the gas pressure stability rate BD.

[0050] Through historical data, the charge reduction rate of the blast furnace under normal working conditions is obtained, which is marked as the normal reduction rate. The current charge reduction rate of the blast furnace is obtained, and the difference between the charge reduction rate and the normal reduction rate is first taken and then the absolute value is taken to obtain the absolute deviation value of the charge reduction rate in the blast furnace. The obtained absolute deviation value of the charge reduction rate in the blast furnace is ratioed with the normal reduction rate to obtain the absolute deviation value ratio XB of the charge reduction rate;

[0051] The obtained gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate are processed by the formula: Obtain the blast furnace performance value BX, where a1 and a2 are both preset proportional coefficients;

[0052] Preset blast furnace performance threshold BXY;

[0053] If the blast furnace performance value BX ≥ the blast furnace performance threshold value BXY, a normal signal is generated, and no dead coke pile appears in the blast furnace at this time;

[0054] If the blast furnace performance value BX is less than the blast furnace performance threshold value BXY, a blocking signal is generated, and a dead coke pile appears in the blast furnace;

[0055] It should be noted that the meaning of the blast furnace performance value BX is: the blast furnace performance value BX is calculated by data from the gas pressure stability rate BD and the absolute deviation value proportion XB of the charge decrease rate, wherein the gas pressure stability rate BD is obtained by ratioing the time maintained within the normal pressure value range corresponding to the pressure change curve in the blast furnace and the total time corresponding to the pressure change curve in the blast furnace. The larger the gas pressure stability rate BD, the more stable the gas pressure in the blast furnace, and the absolute deviation value proportion XB of the charge decrease rate is obtained by the ratio of the absolute value of the difference between the current charge decrease rate and the normal charge decrease rate to the normal charge decrease rate. The smaller the absolute deviation value proportion XB of the charge decrease rate is, the more stable the charge decrease rate in the blast furnace.

[0056] The technical solution of the present invention is: using the blast furnace internal monitoring system to obtain blast furnace operating status parameters within the monitoring period, obtaining the blast furnace performance value BX through the blast furnace operating status parameters, judging whether blockage occurs in the blast furnace based on the obtained performance value BX inside the blast furnace, and generating an analysis signal. By combining the blast furnace internal monitoring system with an intelligent analysis algorithm, real-time monitoring and accurate judgment of the blast furnace operating status can be achieved, thereby ensuring the smooth operation of the blast furnace.

[0057] Example 2

[0058] like Figure 1 As shown, a method for central ore addition to quickly eliminate dead coke compost and greatly promote furnace condition recovery according to an embodiment of the present invention comprises:

[0059] Step 2: Based on the generated blocking signal, the dead coke pile in the blast furnace is treated by central ore addition to eliminate the dead coke pile. The blast furnace performance value BX and the ore status value ZT are analyzed to obtain the ore performance value ZY. Based on the obtained ore performance value ZY, it is determined whether the ore can meet the requirements of central ore addition to remove the dead coke pile.

[0060] Obtain ore with a mass of M through an electronic weighing instrument, screen the obtained ore through a screening machine, weigh the mass of the ore after the screening machine completes the screening, and obtain the screened mass M1. The screened mass M1 is ratioed with the obtained ore mass M to obtain the ore screening rate SY;

[0061] Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore, mark it as the mass after drying N1, make a difference between the mass of the ore of mass N and the mass after drying N1 to obtain the mass of the ore after water removal, and make a ratio between the mass of the ore after water removal and the mass of the ore of mass N to obtain the moisture content SL of the ore;

[0062] The ore is placed in a high temperature environment and carbon monoxide with a mass of MY is introduced for reaction. Then the gas after the reaction is collected in a container of fixed volume. The concentration of carbon dioxide after the reaction is detected by a carbon dioxide detector. The mass of carbon dioxide actually produced after the reaction is obtained according to the density formula M=ρ*V, which is marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide.

[0063] Through 2CO+O 2 →2CO 2 From the reaction process of carbon monoxide turning into carbon dioxide, we can know that theoretically, equal moles of carbon monoxide are completely converted into equal moles of carbon dioxide, so through the mole formula: The theoretical mass of carbon monoxide converted into carbon dioxide is obtained and marked as theoretical mass M1, where M CO represents the molar mass of carbon monoxide, Represents the molar mass of carbon dioxide, and the ore reduction rate HY is obtained by ratioing the actual mass M obtained with the theoretical mass M1;

[0064] It should be noted that the data of ore screening rate SY, ore moisture content SL and ore reduction rate HY are all obtained from the same batch of ore through the above steps;

[0065] The ore screening rate SY, ore moisture content SL and ore reduction rate HY are processed by the formula: Obtain the state value ZT of the ore, where b1, b2 and b3 are all preset proportional coefficients;

[0066] It should be noted that the meaning of the state value ZT of the ore is: the state value ZT of the ore is calculated by data processing of the ore screening rate SY, the ore moisture content SL and the ore reduction rate HY, wherein the ore screening rate indicates the ratio of the mass of the ore screening to the mass of the ore. The larger the ore screening rate, the more uniform the ore particles. The ore moisture content is obtained by calculating the mass difference between the ore before and after drying to obtain the mass of the ore moisture removed. The mass of the ore moisture removed is compared with the mass of the ore before drying to obtain the ore moisture content. The smaller the ore moisture content, the higher the degree of drier the ore. The ore reduction rate HY indicates the ratio of the mass of the carbon monoxide in the coal gas actually reduced to carbon dioxide by the ore to the mass of the carbon monoxide theoretically reduced to carbon dioxide by the ore. The larger the ore reduction rate HY, the better the reduction performance of the ore.

[0067] The obtained ore status value ZT and blast furnace performance value BX are processed by the formula: Obtain the performance value ZY of the ore, where c1 and c2 are preset proportional coefficients;

[0068] Compare the obtained ore performance value ZY with the ore performance threshold value ZYY;

[0069] If the ore performance value ZY ≥ the ore performance threshold ZYY, the ore meets the requirements of central ore addition to remove the dead coke pile, and the ore needs to be processed in the next step;

[0070] If the ore performance value ZY is less than the ore performance threshold ZYY, the ore does not meet the requirements of central ore addition to remove dead coke piles. At this time, it is necessary to adjust the ore status value and re-evaluate the obtained ore performance value;

[0071] The technical solution of the present invention is: based on generating a blockage signal, central ore addition and elimination treatment is performed on the dead coke pile in the blast furnace, the blast furnace performance value BX and the ore status value ZT are analyzed to obtain the ore performance value ZY, and based on the obtained ore performance value ZY, it is judged whether the ore can meet the requirements of central ore addition and removal of the dead coke pile. By analyzing the ore performance value ZY, the operator can accurately judge whether the ore is suitable for central ore addition treatment, thereby ensuring that the selected ore can effectively remove the dead coke pile and avoiding invalid or inefficient ore use.

[0072] Example 3

[0073] like Figure 1 As shown, a method for central ore addition to quickly eliminate dead coke compost and greatly promote furnace condition recovery according to an embodiment of the present invention comprises:

[0074] Step 3: Based on the requirement that the ore reaches the central ore addition to remove the dead coke pile, the ore is added directly above the dead coke pile to remove the dead coke pile in the blast furnace. During the monitoring period, the ore addition rate and the ore performance value ZY are analyzed to obtain the ore performance value change curve. Based on the ore performance value change curve, the ore action value ZT is obtained. Based on the obtained ore action value ZT, it is determined whether the ore addition rate has an impact on the ore performance value ZY and an impact signal is generated. The impact signal is divided into an adjustment signal and a maintenance signal.

[0075] Through the historical data, the ore addition rate and the ore performance value ZY corresponding to the ore addition rate are obtained, and then a rectangular coordinate system is established with the ore addition rate as the X-axis and the ore performance value as the Y-axis. The ore performance value corresponding to the ore addition rate is marked in the rectangular coordinate system to obtain the ore performance value change curve;

[0076] Based on the obtained ore performance value change curve, divide it into several sub-segments to obtain ore performance value change curve sub-segments, mark them as ore change sub-segments, obtain the endpoints of the ore change sub-segment at both ends and connect them to obtain the ore change sub-segment connection line, number the endpoints of all wind speed parameter change sub-segment connection lines as i (where i=1, 2, 3...n), obtain the ore performance value corresponding to one of the endpoints i on the Y axis, perform difference processing on it and the ore performance value corresponding to the other adjacent endpoint i-1 on the Y axis to obtain the ore performance value difference, mark the ore change sub-segment corresponding to the ore performance value difference greater than 0 as an ascending sub-segment, count the number of ascending sub-segments, perform ratio processing on it and the number of all ore change sub-segments, and obtain the ascending sub-segment proportion CZ;

[0077] Based on the rising sub-segment obtained above, the area enclosed by the rising sub-segment and the X-axis is measured, the areas enclosed by all the rising sub-segments and the X-axis are counted and summed up to obtain the total area of ​​the rising sub-segments, the average of the total area of ​​the rising sub-segments is taken to obtain the mean area of ​​the rising sub-segments, the difference between the obtained mean area of ​​the rising sub-segments and the preset mean area threshold of the rising sub-segments is first taken, and then the absolute value is taken to obtain the absolute value of the mean difference of the rising sub-segments, the absolute value of the mean difference of the rising sub-segments is taken to obtain the ratio of the absolute value of the mean difference of the rising sub-segments and the mean area threshold of the rising sub-segments, and the ratio is taken to obtain the absolute value ratio of the mean difference of the rising sub-segments, which is marked as the mean difference ratio of the rising sub-segments MB;

[0078] The obtained rising sub-segment proportion CZ and the rising sub-segment area mean difference proportion MB are processed by the formula: Get the ore action value ZT, where n1 and n2 are preset proportional coefficients;

[0079] Preset ore action threshold ZTY;

[0080] If the ore action value ZT ≥ the ore action threshold ZTY, an adjustment signal is generated. At this time, the ore addition rate needs to be adjusted to adjust the ore action value;

[0081] If the ore action value ZT is less than the ore action threshold ZTY, a maintenance signal is generated, and the blast furnace equipment fails and needs to be repaired;

[0082] The technical solution of the present invention is: based on the requirement that the ore reaches the central ore addition to remove the dead coke pile, the ore is added directly above the dead coke pile to remove the dead coke pile in the blast furnace, and the ore performance value change curve is obtained by analyzing the ore addition rate and the ore performance value ZY during the monitoring period, and the ore action value ZT is obtained based on the ore performance value change curve, and based on the obtained ore action value ZT, it is judged whether the ore addition rate has an impact on the ore performance value ZY and an impact signal is generated. By analyzing the ore performance value change curve, the operator can accurately judge the impact of the ore addition rate on the ore performance value ZY, thereby generating an adjustment signal in time, and accurately adjusting the ore addition rate to ensure that the ore addition rate is in an optimal state.

[0083] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for rapidly eliminating dead coke and composting by adding ore centrally to promote furnace condition recovery, characterized in that: include: Step 1: using the internal monitoring system of the blast furnace to obtain the blast furnace operation status parameters within the monitoring period, the operation status parameters include the gas pressure stability rate BD and the charge drop rate ratio XB, and obtaining the blast furnace performance value BX through the blast furnace operation status parameters, judging whether the blast furnace is blocked based on the obtained performance value BX in the blast furnace, and generating an analysis signal, which is divided into a blocking signal and a normal signal; Step 2: Based on the generated blocking signal, the dead coke pile in the blast furnace is treated by central ore addition to eliminate the dead coke pile. The blast furnace performance value BX and the ore status value ZT are analyzed to obtain the ore performance value ZY. Based on the obtained ore performance value ZY, it is determined whether the ore can meet the requirements of central ore addition to remove the dead coke pile. Step three: based on the requirement that the ore reaches the central ore addition to remove the dead coke pile, the ore is added directly above the dead coke pile to remove the dead coke pile in the blast furnace, and the ore performance value change curve is obtained by analyzing the ore addition rate and the ore performance value ZY during the monitoring period, and the ore action value ZT is obtained based on the ore performance value change curve, and based on the obtained ore action value ZT, it is determined whether the ore addition rate has an impact on the ore performance value ZY and an impact signal is generated, and the impact signal is divided into an adjustment signal and a maintenance signal.

2. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 1, characterized in that: The blast furnace performance value BX is obtained as follows: The obtained gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate are processed by the formula: The blast furnace performance value BX is obtained, where a1 and a2 are both preset proportional coefficients.

3. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 2, characterized in that: The gas pressure stability rate BD is obtained in the following manner: The pressure data in the blast furnace is obtained in real time through the pressure sensor, and then a rectangular coordinate system is established with time as the X-axis and the pressure in the blast furnace as the Y-axis. The real-time pressure in the blast furnace is marked in the rectangular coordinate system to obtain a pressure change curve in the blast furnace; The maximum and minimum pressure values ​​during normal operation of the blast furnace are obtained through historical data. In the rectangular coordinate system, a maximum pressure reference line is made on the Y axis with the maximum pressure value as the reference point and parallel to the X axis, and it is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is made on the Y axis with the minimum pressure value as the reference point and parallel to the X axis, and it is marked as the minimum standard pressure limit line. The pressure value between the minimum standard pressure limit line and the maximum standard pressure limit line is marked as the normal pressure value, and the pressure value below the minimum standard pressure limit line and above the maximum standard pressure limit line is marked as the escape pressure value; In the blast furnace pressure change curve, the duration of the blast furnace pressure change curve on the X-axis is counted and marked as the total time. Then, the duration of the blast furnace pressure change curve within the normal pressure value range on the X-axis is counted and marked as the normal time. The obtained normal time is ratioed to the total time to obtain the gas pressure stability rate BD. The absolute deviation value proportion XB of the charge drop rate is obtained as follows: Through historical data, the charge descent rate of the blast furnace under normal working conditions is obtained and marked as the normal descent rate. The current descent rate of the blast furnace charge is obtained, and the difference between it and the normal descent rate is first taken and then the absolute value is taken to obtain the absolute deviation value of the charge descent rate in the blast furnace. The obtained absolute deviation value of the charge descent rate in the blast furnace is ratioed with the normal descent rate to obtain the absolute deviation value proportion XB of the charge descent rate.

4. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 1, characterized in that: The state value ZT of the ore is obtained as follows: The ore screening rate SY, ore moisture content SL and ore reduction rate HY are processed by the formula: The state value ZT of the ore is obtained, wherein b1, b2 and b3 are all preset proportional coefficients.

5. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 4, characterized in that: The ore screening rate SY is obtained in the following manner: Obtain ore with a mass of M through an electronic weighing instrument, screen the obtained ore through a screening machine, weigh the mass of the ore after the screening machine completes the screening, and obtain the screened mass M1. The screened mass M1 is ratioed with the obtained ore mass M to obtain the ore screening rate SY; The ore moisture content SL is obtained in the following manner: Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore, mark it as the mass after drying N1, make a difference between the mass of the ore of mass N and the mass after drying N1 to get the mass of the ore after moisture removal, and make a ratio between the mass of the ore after moisture removal and the mass of the ore of mass N to get the moisture content SL of the ore.

6. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 4, characterized in that: The ore reduction rate HY is obtained as follows: The ore is placed in a high temperature environment and carbon monoxide with a mass of MY is introduced for reaction. Then the gas after the reaction is collected in a container of fixed volume. The concentration of carbon dioxide after the reaction is detected by a carbon dioxide detector. The mass of carbon dioxide actually produced after the reaction is obtained according to the density formula M=ρ*V, which is marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide; From the reaction process of carbon monoxide turning into carbon dioxide obtained by 2CO+O2→2CO2, we can know that theoretically, equal moles of carbon monoxide are completely converted into equal moles of carbon dioxide, so through the mole formula: The theoretical mass of carbon monoxide converted into carbon dioxide is obtained and marked as theoretical mass M1, where M CO represents the molar mass of carbon monoxide, M CO2 It represents the molar mass of carbon dioxide. The actual mass M obtained is ratioed with the theoretical mass M1 to obtain the ore reduction rate HY.

7. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 1, characterized in that: The ore performance value ZY is obtained in the following way: The obtained ore status value ZT and blast furnace performance value BX are processed by the formula: The performance value ZY of the ore is obtained, where c1 and c2 are both preset proportional coefficients.

8. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 1, characterized in that: The ore action value ZT is obtained in the following way: The obtained rising sub-segment proportion CZ and the rising sub-segment area mean difference proportion MB are processed by the formula: The ore action value ZT is obtained, where n1 and n2 are both preset proportional coefficients.

9. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 8, characterized in that: The ascending sub-segment proportion CZ is obtained as follows: Through the historical data, the ore addition rate and the ore performance value ZY corresponding to the ore addition rate are obtained, and then a rectangular coordinate system is established with the ore addition rate as the X-axis and the ore performance value as the Y-axis. The ore performance value corresponding to the ore addition rate is marked in the rectangular coordinate system to obtain the ore performance value change curve; Based on the obtained ore performance value change curve, it is divided into several sub-segments to obtain ore performance value change curve sub-segments, which are marked as ore change sub-segments, the endpoints of the ore change sub-segment are obtained and connected to obtain the ore change sub-segment connecting line, and the endpoints of all wind speed parameter change sub-segment connecting lines are numbered as i, i=1, 2, 3...n, and the ore performance value corresponding to one of the endpoints i on the Y-axis is obtained, and the ore performance value corresponding to the adjacent endpoint i-1 on the Y-axis is subtracted to obtain the ore performance value difference, and the ore change sub-segment corresponding to the ore performance value difference greater than 0 is marked as an ascending sub-segment, the number of ascending sub-segments is counted, and the ratio is processed with the number of all ore change sub-segments to obtain the ascending sub-segment proportion CZ.

10. The method of central ore addition for rapid elimination of dead coke compost and great promotion of furnace condition recovery according to claim 8, characterized in that: The method for obtaining the mean difference ratio MB of the ascending sub-segment area is as follows: Measure the area enclosed by the rising sub-segment and the X-axis, count the areas enclosed by all the rising sub-segments and the X-axis and sum them up to get the total area of ​​the rising sub-segments, take the average of the total area of ​​the rising sub-segments to get the mean area of ​​the rising sub-segments, first perform subtraction and then take the absolute value processing on the obtained mean area of ​​the rising sub-segments and the preset threshold value of the mean area of ​​the rising sub-segments to get the absolute value of the difference in the mean area of ​​the rising sub-segments, perform ratio processing on the absolute value of the difference in the mean area of ​​the rising sub-segments and the threshold value of the mean area of ​​the rising sub-segments to get the absolute value ratio of the difference in the mean area of ​​the rising sub-segments, and mark it as the ratio of the difference in the mean area of ​​the rising sub-segments MB.

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