A method for rapidly eliminating dead coke and composting by adding ore centrally to promote furnace condition recovery

Abstract

The present invention relates to the technical field of central ore addition, and specifically discloses a method for rapidly eliminating dead coke piles by central ore addition and greatly promoting furnace condition recovery. The method comprises: obtaining blast furnace operating status parameters within a monitoring period to obtain a blast furnace performance value BX, judging whether a blockage occurs in the blast furnace based on the obtained performance value BX in the blast furnace, analyzing the blast furnace performance value BX and an ore status value ZT to obtain an ore performance value ZY, judging whether the ore can meet the requirement of central ore addition for removing dead coke piles based on the obtained ore performance value ZY, adding ore directly above the dead coke pile to remove the dead coke pile in the blast furnace, obtaining an ore performance value change curve by analyzing the ore addition rate and the ore performance value ZY within the monitoring period, obtaining an ore action value ZYT based on the ore performance value change curve, judging whether the ore addition rate has an impact on the ore performance value ZY based on the obtained ore action value ZYT, and generating an impact signal.

Description

Technical Field

[0001] The invention relates to the technical field of central ore adding, 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 industry, particularly the steel industry, the formation of dead coke piles during blast furnace ironmaking often hamper smooth production line operation. The accumulation of dead coke piles not only hinders blast furnace logistics but also causes thermal imbalances, directly impacting production efficiency and product quality.

[0003] A Chinese patent application with publication number CN112813208A discloses an operating method for digesting a large dead coke compost in a furnace hearth, 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 being ≤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 to be above 0.6 in operation; air is supplied through all tuyere ports, and the injection is uniform throughout the tuyere ports; the coal injection ratio is controlled at 140-150kg / t; a blast furnace with four tapholes adopts a three-taphole circulating iron tapping mode; stable raw material and fuel support is adopted, screening is enhanced, and the content of ore powder ≤5mm entering the furnace is less than 1.5%; the silicon content of pig iron is controlled at 0.35-0.55%, and the sulfur content of pig iron is controlled in the range of 0.025-0.4% to adjust the slag alkalinity, the physical heat of the molten iron is ≥1510℃, and the furnace is washed with slag iron. The present invention can gradually digest the hearth on the basis of stable production and low consumption of the blast furnace.

[0004] The existing technology lacks ore selection for central ore addition to remove dead coke piles, resulting in ore waste. It also lacks analysis of the effect of ore addition speed on dead coke pile removal, making it impossible to ensure that the ore is removed from the dead coke pile at the 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 rapidly eliminating dead coke compost by adding ore centrally and greatly promoting furnace condition recovery, comprising:

[0008] Step 1: Use the blast furnace internal monitoring system to obtain blast furnace operating status parameters during the monitoring period. The operating status parameters include the gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate. The blast furnace performance value BX is obtained from the blast furnace operating status parameters. Based on the obtained blast furnace performance value BX, it is determined whether the blast furnace is blocked and an analysis signal is generated. The analysis signal is divided into a blockage signal and a normal signal.

[0009] Step 2: Based on the generated blockage 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 meets the requirements for central addition of ore to eliminate the dead coke pile.

[0010] 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 ZYT is obtained. Based on the obtained ore action value ZYT, 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.

[0011] As a further solution of the present invention: the blast furnace performance value BX is obtained as follows:

[0012] The obtained gas pressure stability rate BD and the absolute deviation ratio XB of the charge drop rate are processed and the formula is used: 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 on the rectangular coordinate system to obtain the 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 a rectangular coordinate system, a maximum pressure reference line is drawn on the Y-axis with the maximum pressure value as the reference point and parallel to the X-axis, and the line is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is drawn on the Y-axis with the minimum pressure value as the reference point and parallel to the X-axis, and the line 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 ratio 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 blast furnace charge descent rate is obtained, and the difference between it and the normal descent rate is first taken and 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 ratio 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 and the formula is used: The state value ZT of the ore is obtained, where 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 as follows:

[0022] Obtain ore of mass 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 screening, and obtain the screened mass M1. Ratio the screened mass M1 to the obtained ore mass M to obtain the ore screening rate SY;

[0023] The ore moisture content SL is obtained as follows:

[0024] Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore and 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 moisture removal. The mass of the ore after moisture removal is ratioed to the mass of the ore of mass N to obtain the moisture content SL of the ore.

[0025] As a further solution of the present invention: the ore reduction rate HY is obtained as follows:

[0026] Place the ore in a high temperature environment and introduce carbon monoxide of mass MY to react. Then use a container of fixed volume to collect the gas after the reaction. Use a carbon dioxide detector to detect the concentration of carbon dioxide after the reaction. According to the density formula The mass of carbon dioxide actually produced after the reaction is obtained and marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide;

[0027] pass 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 ore reduction rate HY is obtained by ratioing the actual mass M obtained with the theoretical mass M1.

[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 ZYT 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 ZYT 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. 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 values corresponding to the ore addition rate are 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-segments are obtained and connected to obtain ore change sub-segment connecting lines, and the endpoints of all ore 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 difference between it and the ore performance value corresponding to the other adjacent endpoint i-1 on the Y-axis is processed 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 method for obtaining the mean difference ratio MB of the ascending sub-segment area is 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 obtain the total area of the rising sub-segments, take the average of the total area of the rising sub-segments to obtain the mean area of the rising sub-segments, first perform subtraction between the obtained mean area of the rising sub-segments and the preset mean area threshold of the rising sub-segments and then take the absolute value to obtain the absolute value of the mean difference of the rising sub-segments areas, perform ratio processing on the absolute value of the mean difference of the rising sub-segments areas and the mean area threshold of the rising sub-segments to obtain the absolute value ratio of the mean difference of the rising sub-segments areas, and mark it as the mean difference ratio of the rising sub-segments areas MB.

[0037] Beneficial effects of the present invention:

[0038] 1. Utilize 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 blast furnace performance value BX, determine whether there is a blockage 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 blockage 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 meets the requirements for central addition of 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 of ore, ensuring that the selected ore can effectively remove the dead coke pile and avoid ineffective or inefficient ore use.

[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 ZYT is obtained based on the ore performance value change curve. Based on the obtained ore action value ZYT, 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 optimal state. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0042] Figure 1 This is a flowchart of the steps of a method for rapidly eliminating dead coke and composting by central ore addition and greatly promoting furnace condition recovery according to the present invention; DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods. Example 1

[0044] like Figure 1 As shown, a method for rapidly eliminating dead coke compost and promoting furnace condition recovery by central ore addition according to an embodiment of the present invention includes:

[0045] Step 1: Use the blast furnace internal monitoring system to obtain blast furnace operating status parameters during the monitoring period. The operating status parameters include the gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate. The blast furnace performance value BX is obtained from the blast furnace operating status parameters. Based on the obtained blast furnace performance value BX, it is determined whether the blast furnace is blocked and an analysis signal is generated. The analysis signal is divided into a blockage signal and a normal signal.

[0046] 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 on the rectangular coordinate system to obtain the pressure change curve in the blast furnace;

[0047] The maximum and minimum pressure values during normal operation of the blast furnace are obtained through historical data. In a rectangular coordinate system, a maximum pressure reference line is drawn on the Y-axis with the maximum pressure value as the reference point and parallel to the X-axis, and the line is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is drawn on the Y-axis with the minimum pressure value as the reference point and parallel to the X-axis, and the line 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.

[0048] 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;

[0049] 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 blast furnace charge descent rate is obtained, and the difference between the difference and the normal descent rate is first taken and the absolute value is processed 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 ratio XB of the charge descent rate;

[0050] The obtained gas pressure stability rate BD and the absolute deviation ratio XB of the charge drop rate are processed and the formula is used: Obtain the blast furnace performance value BX, where a1 and a2 are preset proportional coefficients;

[0051] Preset blast furnace performance threshold BXY;

[0052] If the blast furnace performance value BX ≥ the blast furnace performance threshold BXY, a normal signal is generated, and no dead coke pile appears in the blast furnace at this time;

[0053] If the blast furnace performance value BX is less than the blast furnace performance threshold BXY, a blocking signal is generated, and a dead coke pile appears in the blast furnace;

[0054] 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 ratio XB of the charge decrease rate, wherein the gas pressure stability rate BD is the ratio of the time maintained within the normal pressure value range corresponding to the pressure change curve in the blast furnace to 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 ratio 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 ratio XB of the charge decrease rate is, the more stable the charge decrease rate in the blast furnace.

[0055] 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 blast furnace performance value BX, 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 progress of the blast furnace operation process.

[0056] Example 2

[0057] like Figure 1 As shown, a method for rapidly eliminating dead coke compost and promoting furnace condition recovery by central ore addition according to an embodiment of the present invention includes:

[0058] Step 2: Based on the generated blockage 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 meets the requirements for central addition of ore to eliminate the dead coke pile.

[0059] Obtain ore of mass 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 screening, and obtain the screened mass M1. Ratio the screened mass M1 to the obtained ore mass M to obtain the ore screening rate SY;

[0060] Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore, marking it as the mass after drying N1. Subtract the mass of the ore of mass N from the mass after drying N1 to obtain the mass of the ore after water removal. The ratio of the mass of the ore after water removal to the mass of the ore of mass N is processed to obtain the moisture content SL of the ore;

[0061] Place the ore in a high temperature environment and introduce carbon monoxide of mass MY to react. Then use a container of fixed volume to collect the gas after the reaction. Use a carbon dioxide detector to detect the concentration of carbon dioxide after the reaction. According to the density formula The mass of carbon dioxide actually produced after the reaction is obtained and marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide;

[0062] pass 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;

[0063] 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;

[0064] The ore screening rate SY, ore moisture content SL and ore reduction rate HY are processed and the formula is used: Get the state value ZT of the ore, where b1, b2 and b3 are preset proportional coefficients;

[0065] It should be noted that the meaning of the ore state value ZT is: the ore state value ZT 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 represents 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 dehydrated, and the mass of the ore dehydrated is ratioed to 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 represents the ratio of the mass of carbon monoxide in the coal gas actually reduced to carbon dioxide by the ore to the mass of 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.

[0066] 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;

[0067] Comparing the obtained ore performance value ZY with the ore performance threshold value ZYY;

[0068] If the ore performance value ZY ≥ the ore performance threshold ZYY, the ore meets the requirements for central ore addition to remove dead coke piles, and the ore needs to be processed for the next step;

[0069] If the ore performance value ZY is less than the ore performance threshold ZYY, the ore does not meet the requirements for central ore addition to remove dead coke piles. In this case, it is necessary to adjust the ore status value and re-evaluate the obtained ore performance value;

[0070] The technical solution of the present invention is: based on the generation of a blockage signal, the dead coke pile in the blast furnace is centrally added with ore 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, and based on the obtained ore performance value ZY, it is judged 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 judge whether the ore is suitable for central addition with ore treatment, ensure that the selected ore can effectively remove the dead coke pile, and avoid invalid or inefficient ore use.

[0071] Example 3

[0072] like Figure 1 As shown, a method for rapidly eliminating dead coke compost and promoting furnace condition recovery by central ore addition according to an embodiment of the present invention includes:

[0073] Step 3: Based on the requirement that the ore meets the central ore addition requirement to remove the dead coke pile, 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 an ore performance value change curve. Based on the ore performance value change curve, the ore action value ZYT is obtained. Based on the obtained ore action value ZYT, 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.

[0074] Through the historical data, the ore addition rate and the ore performance value ZY corresponding to the ore addition rate are obtained. 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 values corresponding to the ore addition rate are marked in the rectangular coordinate system to obtain the ore performance value change curve;

[0075] 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 and connect them to obtain ore change sub-segment connecting lines, number all the endpoints of the ore change sub-segment connecting 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 subtraction processing on the ore performance value corresponding to the 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 the ascending sub-segment to the number of all ore change sub-segments, and obtain the ascending sub-segment proportion CZ;

[0076] Based on the rising sub-segments obtained above, the area enclosed by the rising sub-segments 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 obtained total area of the rising sub-segments is taken to obtain the mean area of the rising sub-segments, the obtained mean area of the rising sub-segments is first subtracted from the preset threshold value of the mean area of the rising sub-segments 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 ratioed with the threshold value of the mean area of the rising sub-segments 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;

[0077] 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 ZYT, where n1 and n2 are preset proportional coefficients;

[0078] Preset ore action threshold ZTY;

[0079] If the ore action value ZYT ≥ 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;

[0080] If the ore action value ZYT is less than the ore action threshold ZTY, a maintenance signal is generated, and the blast furnace equipment has failed and needs to be repaired;

[0081] 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 during the monitoring period, the ore addition rate and the ore performance value ZY are analyzed to obtain an ore performance value change curve, and the ore action value ZYT is obtained based on the ore performance value change curve. Based on the obtained ore action value ZYT, 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, accurately adjusting the ore addition rate, and ensuring that the ore addition rate is in an optimal state.

[0082] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope 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 central ore addition to greatly promote furnace condition recovery, characterized by: include: Step 1: Use the blast furnace internal monitoring system to obtain blast furnace operating status parameters during the monitoring period. The operating status parameters include the gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate. The blast furnace performance value BX is obtained from the blast furnace operating status parameters. Based on the obtained blast furnace performance value BX, it is determined whether the blast furnace is blocked and an analysis signal is generated. The analysis signal is divided into a blockage signal and a normal signal. Step 2: Based on the generated blockage 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 meets the requirements for central addition of ore to eliminate the dead coke pile. Step 3: Based on the requirement that the ore meets the central ore addition requirement to remove the dead coke pile, 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 an ore performance value change curve. Based on the ore performance value change curve, the ore action value ZYT is obtained. Based on the obtained ore action value ZYT, 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. The gas pressure stability rate BD is obtained as follows: 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 on the rectangular coordinate system to obtain the 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 a rectangular coordinate system, a maximum pressure reference line is drawn on the Y-axis with the maximum pressure value as the reference point and parallel to the X-axis, and the line is marked as the maximum standard pressure limit line. Similarly, a minimum pressure reference line is drawn on the Y-axis with the minimum pressure value as the reference point and parallel to the X-axis, and the line 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 ratio 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 blast furnace charge descent rate is obtained, and the difference between the difference and the normal descent rate is first taken and the absolute value is processed 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 ratio XB of the charge descent rate; The blast furnace performance value BX is obtained by processing the obtained gas pressure stability rate BD and the absolute deviation value ratio XB of the charge drop rate, and using the formula: Obtain the blast furnace performance value BX, where a1 and a2 are preset proportional coefficients; 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 and the formula is used: Obtain the state value ZT of the ore, where b1, b2, and b3 are preset proportional coefficients; The ore performance value ZY is obtained as follows: 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; The ore action value ZYT is obtained as follows: 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 ZYT is obtained, where n1 and n2 are both preset proportional coefficients.

2. The method of claim 1, wherein: The ore screening rate SY is obtained as follows: Obtain ore of mass 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 screening, and obtain the screened mass M1. Ratio the screened mass M1 to the obtained ore mass M to obtain the ore screening rate SY; The ore moisture content SL is obtained as follows: Obtain ore of mass N through an electronic weighing instrument, dry it, and then weigh the mass of the dried ore and 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 moisture removal. The mass of the ore after moisture removal is ratioed to the mass of the ore of mass N to obtain the moisture content SL of the ore.

3. The method of claim 1, wherein: The ore reduction rate HY is obtained as follows: Place the ore in a high temperature environment and introduce carbon monoxide of mass MY to react. Then use a container of fixed volume to collect the gas after the reaction. Use a carbon dioxide detector to detect the concentration of carbon dioxide after the reaction. According to the density formula The mass of carbon dioxide actually produced after the reaction is obtained and marked as the actual mass M, where V represents the volume of the container and ρ represents the concentration of carbon dioxide; pass 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 ore reduction rate HY is obtained by ratioing the actual mass M obtained with the theoretical mass M1.

4. The method of claim 1, wherein: 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. 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 values corresponding to the ore addition rate are 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-segments are obtained and connected to obtain ore change sub-segment connecting lines, and the endpoints of all ore 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 difference between it and the ore performance value corresponding to the other adjacent endpoint i-1 on the Y-axis is processed 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.

5. The method of central ore addition for rapid elimination of dead coke compost and significant promotion of furnace condition recovery according to claim 1, 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 obtain the total area of the rising sub-segments, take the average of the total area of the rising sub-segments to obtain the mean area of the rising sub-segments, first perform subtraction between the obtained mean area of the rising sub-segments and the preset mean area threshold of the rising sub-segments and then take the absolute value to obtain the absolute value of the mean difference of the rising sub-segments areas, perform ratio processing on the absolute value of the mean difference of the rising sub-segments areas and the mean area threshold of the rising sub-segments to obtain the absolute value ratio of the mean difference of the rising sub-segments areas, and mark it as the mean difference ratio of the rising sub-segments areas MB.

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