A coking stability control method for mixing bituminous coal and coke fine coal

Abstract

This invention relates to the field of coking coal blending control technology, and discloses a method for controlling the coking stabilization of bituminous coal and coking coal blends, comprising the following steps: obtaining the thermoplastic parameters, petrographic parameters, and moisture parameters of bituminous coal and coking coal in the current control batch; establishing a dual-coal plasticity synergistic stabilization window based on the thermoplastic parameters and petrographic parameters, and determining the target dry basis blending ratio within the dual-coal plasticity synergistic stabilization window; converting the target dry basis blending ratio into the actual wet basis feed rate based on the moisture parameter; obtaining the actual particle size distribution after crushing, and adjusting the crushing parameters and feed compensation correction when there is a particle size deviation; blending according to the corrected actual wet basis feed rate, and obtaining the thermoplastic verification parameters of the blended coal; when the blended coal deviates from the target verification range, identifying the cause of deviation as moisture deviation, particle size deviation, or coal quality deviation according to a preset order, and performing corresponding corrections.

Description

Technical Field

[0001] This invention relates to the field of coking coal blending control technology, specifically a method for controlling the coking properties of a blend of bituminous coal and coking coal. Background Technology

[0002] In the coking process, bituminous coal and coking coal are usually blended in a certain proportion to form a blended coal that meets the requirements for coking. The blending effect is not only related to the ratio of the two coal types, but also closely related to their respective thermoplastic parameters, petrographic composition, moisture state, and particle size distribution after crushing. Among them, the thermoplastic overlap affects the degree of synergy between the two coal types in the thermoplastic stage, the petrographic composition affects the skeleton support state of the blended coal, and moisture and particle size further affect the actual feeding results and blending uniformity.

[0003] In existing technologies, the blending control of bituminous coal and coking coal is mostly based on a pre-set coal blending scheme or static test results to determine the target blending ratio, and the blending is carried out according to the corresponding feed rate. In some control methods, the feeding process is also modified individually based on the moisture content or crushing particle size of the single coal. However, such methods usually focus on the individual control of a certain type of parameter, and are more about executing the set blending ratio. They lack synergistic constraints around the thermoplastic overlap width, peak misalignment, and weighted organic inert component content of the two coal types. They also lack a control mechanism that, after blending, combines the thermoplasticity verification results of the blended coal to identify the causes of deviations in a layered manner and make targeted corrections.

[0004] However, in actual production, fluctuations in the measured moisture content of bituminous coal and coking coal can cause the original wet-basis feeding relationship to deviate from the target dry-basis ratio. Changes in the proportion of fine or coarse particles after crushing can further affect the blending uniformity and the actual particle state involved in the reaction. Furthermore, changes in the thermoplastic parameters or petrographic parameters of individual coals can disrupt the previously established thermoplastic synergistic relationship and skeletal constraint state. The combined effect of these factors can easily cause the blended coal to deviate from the expected thermoplastic check range, leading to a decrease in coking stability and making it difficult to consistently maintain the quality consistency of blended coal across different control batches. Summary of the Invention

[0005] The purpose of this invention is to provide a method for controlling the coking stability of a blend of bituminous coal and coking coal, in order to solve the problem that in the existing blending control of bituminous coal and coking coal, it is difficult to maintain the stability of the actual dry basis ratio and thermoplastic synergy under the influence of moisture deviation, particle size deviation and coal quality deviation, which leads to insufficient coking stability of the blended coal.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: a method for controlling the coking properties of a blend of bituminous coal and coking coal, comprising the following steps: S1. Obtain the first thermoplastic parameters, first coal petrographic parameters, and first moisture parameters of the bituminous coal to be blended in the current controlled batch, as well as the second thermoplastic parameters, second coal petrographic parameters, and second moisture parameters of the coking coal to be blended. S2. Determine the plastic synergy parameters of bituminous coal and coking coal based on the first thermoplastic parameters and the second thermoplastic parameters, determine the skeleton constraint range of the target blended coal based on the first coal petrographic parameters and the second coal petrographic parameters, and determine the parameter range that satisfies the preset plastic synergy conditions and whose weighted organic inert component content of the target blended coal falls into the skeleton constraint range as the dual coal plastic synergy stability window. S3. Determine the target dry basis ratio of bituminous coal and coking coal within the plastic synergistic stability window of the two coals, and convert the target dry basis ratio into the actual wet basis feed amount of bituminous coal and coking coal respectively according to the first moisture parameter and the second moisture parameter. S4. Crush bituminous coal and coking coal separately, obtain the actual particle size distribution after crushing, and compare the actual particle size distribution of bituminous coal and coking coal with the preset target particle size distribution to determine whether there is a particle size deviation; when there is a particle size deviation, first adjust the crushing parameters of the coal type with particle size deviation; if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, compensate and correct the actual wet basis feed amount of the coal type with particle size deviation while maintaining the establishment of the dual coal plasticity synergistic stability window; S5. Mix bituminous coal and coking coal according to the corrected actual wet basis feed amount, obtain the thermoplastic verification parameters of the blended coal, and determine whether the blended coal deviates from the target verification interval set corresponding to the dual coal plasticity synergistic stability window based on the thermoplastic verification parameters. S6. When the blended coal deviates from the target verification range, the cause of deviation is identified as moisture deviation, particle size deviation, or coal quality deviation according to the preset judgment order, and the following corrections are performed based on the identification results: When the cause of deviation is moisture deviation, the actual wet basis feed amount of the coal type with moisture deviation is corrected; when the cause of deviation is particle size deviation, the crushing parameters of the coal type with particle size deviation are adjusted, and if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, the actual wet basis feed amount of the coal type is compensated and corrected; when the cause of deviation is coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is corrected; and the blending, thermoplastic verification, and deviation correction are repeated in the next control batch.

[0007] Preferably, both the first thermoplastic parameter and the second thermoplastic parameter include the initial softening temperature, the temperature corresponding to the maximum flowability, and the curing temperature; Both the first and second coal petrographic parameters are parameters of the content of organic inert components.

[0008] Preferably, the plastic synergy parameters include plastic overlap width and peak misalignment. The plastic overlap width is determined by the following method: the higher of the initial softening temperatures of bituminous coal and coking coal is used as the plastic overlap starting temperature, the lower of the solidification temperatures of bituminous coal and coking coal is used as the plastic overlap ending temperature, and the difference between the plastic overlap ending temperature and the plastic overlap starting temperature is used as the plastic overlap width. The peak misalignment is the absolute value of the temperature difference corresponding to the maximum fluidity of bituminous coal and coking coal.

[0009] Preferably, the skeleton constraint range is the allowable range of weighted organic inert component content of the target blended coal; The weighted organic inert component content of the target blended coal is determined based on the mass fraction of bituminous coal and coking coal in the target dry basis blending ratio and their respective organic inert component content. When the plastic overlap width is not less than the preset minimum overlap width, the peak misalignment is not higher than the preset maximum misalignment, and the weighted organic inert component content of the target blended coal falls within the skeleton constraint range, it is determined that the current control batch is within the dual-coal plastic synergistic stability window.

[0010] Preferably, in step S3, the process of converting the target dry basis ratio into the actual wet basis feed amounts of bituminous coal and coking coal respectively includes: The dry matter mass ratio corresponding to the actual wet basis feed amount of bituminous coal is determined based on the measured moisture content of the bituminous coal. The dry matter mass ratio corresponding to the actual wet basis feed amount of coking coal is determined based on the measured moisture content of the coking coal. Based on the dry matter distribution relationship corresponding to the target dry basis ratio, the actual wet basis feed rate of bituminous coal and the actual wet basis feed rate of coking coal are determined respectively. When the measured moisture difference between bituminous coal and coking coal exceeds the preset moisture difference threshold, the actual wet basis feed rate of the coal type with abnormal moisture difference is adjusted first, and then the blending is performed.

[0011] Preferably, the preset target particle size distribution includes the target particle size distribution of bituminous coal and the target particle size distribution of coking coal, wherein the target particle size distribution of bituminous coal and the target particle size distribution of coking coal correspond to the upper limit of the target fine particle size ratio and the upper limit of the target coarse particle size ratio of their respective coal types, respectively. The particle size deviation includes fine-grained exceeding deviation and coarse-grained exceeding deviation; When there is an excessive deviation in fine particles in bituminous coal or coking coal, adjust the crushing parameters of the coal type to reduce the proportion of fine particles in the coal type. When there is an excessive deviation in coarse particles in bituminous coal or coking coal, the crushing parameters of the coal type are adjusted to reduce the proportion of coarse particles in the coal type. If, after adjusting the crushing parameters, there is still a particle size deviation exceeding the preset particle size threshold, the actual wet basis feed amount of the coal type with the particle size deviation is compensated and corrected.

[0012] Preferably, the target verification interval consists of a target initial softening temperature interval, a target maximum fluidity temperature interval, and a target solidification temperature interval, all set corresponding to the dual-coal plasticity synergistic stability window. When the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal all fall within their respective target ranges, it is determined that the blended coal has not deviated from the target verification range. If at least one of the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal does not fall within the corresponding target range, the blended coal is determined to deviate from the target verification range.

[0013] Preferably, in step S6, the order in which the causes of deviation are identified is as follows: First, the measured moisture content of bituminous coal and coking coal in the current controlled batch is compared with the corresponding moisture parameters used in S3 to convert the actual wet basis feed amount. When the moisture deviation of any coal type exceeds the preset moisture deviation threshold, the deviation of the current controlled batch is determined to be moisture deviation. If the deviation is not determined to be due to moisture, the actual particle size distribution of bituminous coal and coking coal in the current controlled batch is compared with the preset target particle size distribution. When the particle size deviation of any coal type exceeds the preset particle size threshold, the deviation of the current controlled batch is determined to be due to particle size deviation. If the deviation is not determined to be due to moisture content or particle size, the cause of the deviation in the current controlled batch will be determined to be coal quality deviation.

[0014] Preferably, when the deviation is due to coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is adjusted according to the deviation of the thermoplastic verification parameters of the blended coal relative to the target verification range; The adjustment satisfies the following conditions: the plastic overlap width corresponding to the adjusted target dry basis ratio increases, the peak misalignment decreases, and the weighted organic inert component content of the target blended coal remains within the skeleton constraint range; The adjustment of the target dry basis ratio is limited by a preset single-batch adjustment range, which is the maximum target dry basis ratio adjustment allowed to be performed within a single control batch. When multiple consecutive control batches are determined to have coal quality deviations, the coal types that have been identified as having coal quality deviations after continuous retesting will no longer be used for blending in subsequent control batches according to the current target dry basis ratio. Instead, based on the re-acquired thermoplastic parameters, petrographic parameters, and moisture parameters of the coal type, and combined with the corresponding parameters of another coal type in the current control batch, a new dual-coal plasticity synergistic stability window will be established, and the target dry basis ratio between bituminous coal and coking coal and their respective actual wet basis feed rates will be re-determined.

[0015] Compared with existing technologies, the coking stabilization control method for a blend of bituminous coal and coking coal using the above-mentioned technical solution has the following beneficial effects: I. Compared with the prior art, the present invention first obtains the thermoplastic parameters, petrographic parameters and moisture parameters of bituminous coal and coking coal respectively, and establishes a dual-coal plastic synergistic stability window based on the plastic overlap width, peak misalignment amount and weighted organic inert component content of the target blended coal. This makes the determination of the target dry basis ratio no longer rely solely on empirical setting or single index control, but simultaneously takes into account the synergistic relationship between the two coal types in the thermoplastic stage and the skeleton constraint state of the blended coal. Thus, it is possible to make a feedforward judgment on the combination state of bituminous coal and coking coal before blending, improve the rationality and pertinence of the target ratio setting, and thus help improve the stable control level of coking properties of blended coal. Second, compared with the prior art, the present invention converts the target dry basis ratio into the actual wet basis feed amount corresponding to each of the two coal types, and combines particle size deviation identification, crushing parameter adjustment and compensation correction re-verification mechanism, so that the impact of moisture fluctuation and particle size fluctuation on the actual feed result can be identified and corrected in a timely manner, thereby avoiding the imbalance of the actual dry basis ratio caused by deviation of wet basis feed relationship or change of particle state, further reducing the mixing fluctuation caused by execution deviation between different control batches, which is conducive to maintaining the feeding consistency and mixing stability of bituminous coal and coking coal in the actual mixing process; Third, compared with the prior art, this invention obtains the thermoplastic verification parameters of the blended coal after blending, and identifies and corrects the causes of deviations in a hierarchical manner according to the order of moisture deviation, particle size deviation, and coal quality deviation. This enables the blending control process to not only constrain parameters before execution, but also to perform feedback verification and closed-loop adjustment based on actual results after execution. Thus, even with fluctuations in single coal parameters, changes in particle size, or changes in coal quality, the target dry basis ratio and feeding process can still be dynamically corrected, thereby improving the consistency of the thermoplastic state of blended coal between different control batches and enhancing the coking stability effect during the blending of bituminous coal and coking coal. Attached Figure Description

[0016] Figure 1 The above is an overall flowchart of the coking stabilization control method for a blend of bituminous coal and coking coal, as an example.

[0017] Figure 2 This is a schematic diagram illustrating the acquisition of single-coal parameters and the establishment of a dual-coal plastic synergistic stability window in an embodiment.

[0018] Figure 3 This is a schematic diagram of the target dry basis ratio conversion and particle size deviation correction process for an embodiment.

[0019] Figure 4 This is a schematic diagram of the process for checking the thermoplastic properties of coal and correcting deviations in a stratified manner, as shown in the example. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-4 As shown, a method for controlling the coking properties of a blend of bituminous coal and coking coal includes the following steps: S1. Obtain the first thermoplastic parameters, first coal petrographic parameters, and first moisture parameters of the bituminous coal to be blended in the current controlled batch, as well as the second thermoplastic parameters, second coal petrographic parameters, and second moisture parameters of the coking coal to be blended. Furthermore, the current control batch refers to the combination of bituminous coal batches and coking coal batches that participate in the blending control as the same calculation and execution unit. The current control batch can be divided according to a fixed time window or according to a fixed processing volume, as long as it can ensure that the parameter acquisition results of this batch correspond to the blending execution process of this batch.

[0022] Samples of bituminous coal and coking coal were taken separately and subjected to thermoplasticity testing, petrographic analysis, and moisture testing to obtain the first thermoplasticity parameter, the first petrographic parameter, the first moisture parameter, the second thermoplasticity parameter, the second petrographic parameter, and the second moisture parameter. To ensure that the parameter sources are consistent with the target, both bituminous coal and coking coal samples were taken from the actual coal streams of the current controlled batches intended for blending.

[0023] In this embodiment, the current control batch is preferably a bituminous coal batch and a coking coal batch that enter their respective metering and feeding channels within the same time window and are planned to participate in a mixed blending operation together, so as to ensure that the parameter acquisition object, calculation object and execution object are consistent.

[0024] S2. Determine the plastic synergy parameters of bituminous coal and coking coal based on the first thermoplastic parameters and the second thermoplastic parameters, determine the skeleton constraint range of the target blended coal based on the first coal petrographic parameters and the second coal petrographic parameters, and determine the parameter range that satisfies the preset plastic synergy conditions and whose weighted organic inert component content of the target blended coal falls into the skeleton constraint range as the dual coal plastic synergy stability window. Furthermore, the dual-coal plastic synergistic stability window is jointly defined by the plastic synergistic parameter and the skeleton constraint interval. The plastic synergistic parameter characterizes the degree of synergy between bituminous coal and coking coal in the thermoplastic stage, and the skeleton constraint interval characterizes the skeleton support conditions of the target blended coal under the current target dry basis ratio. The parameter range that satisfies the preset plastic synergistic conditions and whose weighted organic inert component content falls within the skeleton constraint interval is determined as the dual-coal plastic synergistic stability window that can be executed for the current control batch. Only when the current control batch is within the dual-coal plastic synergistic stability window will it proceed to the subsequent target dry basis ratio determination step.

[0025] In this embodiment, the dual-coal plastic synergistic stability window corresponds to a set of target dry basis ratio ranges that are allowed to be executed. For any candidate target dry basis ratio within this range, the plastic overlap width condition, the peak misalignment condition, and the weighted organic inert component content condition of the target blended coal must be met simultaneously.

[0026] S3. Determine the target dry basis ratio of bituminous coal and coking coal within the plastic synergistic stability window of the two coals, and convert the target dry basis ratio into the actual wet basis feed amount of bituminous coal and coking coal respectively according to the first moisture parameter and the second moisture parameter. Furthermore, the target dry basis ratio refers to the dry matter mass ratio after deducting the moisture content of bituminous coal and coking coal. Within the dual-coal plasticity synergistic stability window corresponding to the current control batch, the control device selects a target dry basis ratio that meets the requirements, and converts the target dry basis ratio into the actual wet basis feed amounts of bituminous coal and coking coal according to the first moisture parameter and the second moisture parameter. In this way, the bituminous coal and coking coal participating in the blending can still correspond to the predetermined target dry basis ratio during the wet basis feeding stage, thereby reducing the deviation in actual dry coal input caused by moisture fluctuations.

[0027] In this embodiment, the target dry basis ratio is not arbitrarily selected within the plastic synergistic stability window of the two coals. Instead, candidate target dry basis ratios that meet the window conditions are first listed, and then the candidate target dry basis ratios that make the weighted organic inert component content of the target blended coal closer to the midpoint of the skeleton constraint interval are preferred as the target dry basis ratio of the current controlled batch.

[0028] S4. Crush bituminous coal and coking coal separately, obtain the actual particle size distribution after crushing, and compare the actual particle size distribution of bituminous coal and coking coal with the preset target particle size distribution to determine whether there is a particle size deviation; when there is a particle size deviation, first adjust the crushing parameters of the coal type with particle size deviation; if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, compensate and correct the actual wet basis feed amount of the coal type with particle size deviation while maintaining the establishment of the dual coal plasticity synergistic stability window; Furthermore, bituminous coal and coking coal are processed through their respective independent crushing channels, and their actual particle size distributions after crushing are obtained separately. The particle size deviations are identified according to coal type to ensure that subsequent corrective actions can directly apply to the coal type experiencing the deviation. When a particle size deviation is identified, the crushing parameters for the corresponding coal type are first adjusted to change the particle size formation process. If, after adjusting the crushing parameters, a particle size deviation exceeding a preset particle size threshold still exists, the actual wet basis feed rate for the coal type experiencing the deviation is then compensated and corrected. The compensated and corrected feed rate should still meet the conditions for the establishment of the dual-coal plastic synergistic stability window.

[0029] In this embodiment, the crushing parameters preferably include at least one of the crushing roller gap, crushing speed, and screening and grading parameters. After compensating and correcting the actual wet basis feed rate for coal types with particle size deviations, the compensated and corrected feed rate needs to be recalculated into the corresponding dry basis mass distribution relationship, and its compliance with the dual-coal plasticity synergistic stability window needs to be rechecked. Only when the recheck is successful will the compensated and corrected actual wet basis feed rate be used for blending.

[0030] S5. Mix bituminous coal and coking coal according to the corrected actual wet basis feed amount, obtain the thermoplastic verification parameters of the blended coal, and determine whether the blended coal deviates from the target verification interval set corresponding to the dual coal plasticity synergistic stability window based on the thermoplastic verification parameters. Furthermore, the target verification interval is used to verify the actual thermoplastic state of the current batch of blended coal. The dual-coal plasticity synergistic stability window is used for feedforward determination before blending, and the target verification interval is used for feedback verification after blending. After blending is completed according to the corrected actual wet basis feed rate, the thermoplasticity of the blended coal is tested to obtain the thermoplasticity verification parameters of the blended coal, and the thermoplasticity verification parameters are compared with the target verification interval.

[0031] In this embodiment, the target verification interval is pre-established based on the target dry basis ratio selected in the current control batch and its corresponding dual-coal plasticity synergistic stability window, so that the feedforward judgment and feedback verification adopt the same evaluation basis.

[0032] When all thermoplastic verification parameters fall within the target verification range, the current control batch is determined to be within the target verification range; when at least one of the thermoplastic verification parameters does not fall within the target verification range, the current control batch is determined to have deviated.

[0033] S6. When the blended coal deviates from the target verification range, the cause of deviation is identified as moisture deviation, particle size deviation, or coal quality deviation according to the preset judgment order, and the following corrections are performed based on the identification results: When the cause of deviation is moisture deviation, the actual wet basis feed amount of the coal type with moisture deviation is corrected; when the cause of deviation is particle size deviation, the crushing parameters of the coal type with particle size deviation are adjusted, and if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, the actual wet basis feed amount of the coal type is compensated and corrected; when the cause of deviation is coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is corrected; and the blending, thermoplastic verification, and deviation correction are repeated in the next control batch.

[0034] Furthermore, the preset judgment order is to first identify moisture deviation, then particle size deviation, and finally coal quality deviation. This order allows for the differentiation of moisture and particle size fluctuations at the execution level from changes in raw material properties. For identified moisture deviations, the correction target is the actual wet basis feed rate of the coal type with the moisture deviation. For identified particle size deviations, the crushing parameters of the coal type with the particle size deviation are first adjusted; if the parameters still do not return to the allowable range after adjustment, the actual wet basis feed rate is then compensated and corrected. For identified coal quality deviations, the target dry basis ratio adjustment process is initiated, and blending, thermoplastic verification, and deviation correction are re-executed in the next control batch.

[0035] In this embodiment, the deviation is determined to be a coal quality deviation only when no exceeding factors are found after moisture deviation identification and particle size deviation identification. The coal quality deviation refers to a change in the thermoplastic parameters or petrographic parameters of at least one coal type in the current controlled batch that exceeds the allowable range relative to the time of S1 sampling.

[0036] In this embodiment, the preset moisture difference threshold and the preset moisture deviation threshold correspond to different judgment scenarios.

[0037] The preset moisture difference threshold is used to determine whether there is a relative moisture difference between bituminous coal and coking coal that would affect the conversion result of the actual wet basis feed before blending. The comparison object is the measured moisture difference between the two coal types in the current controlled batch. The preset moisture deviation threshold is used to determine whether the current measured moisture content of a single coal type has changed beyond the limit relative to the corresponding moisture parameter in S3 used to convert the actual wet basis feed amount after the blended coal deviates from the target verification range. The comparison object is the difference between the current measured moisture content of the same coal type and the corresponding moisture parameter in S3 used to convert the actual wet basis feed amount.

[0038] Therefore, the former is used for feeding conversion correction and judgment before mixing, while the latter is used for layered identification of deviation causes after mixing.

[0039] In this embodiment, both the first thermoplastic parameter and the second thermoplastic parameter include the initial softening temperature, the temperature corresponding to the maximum flowability, and the curing temperature. Both the first and second coal petrographic parameters are parameters of the content of organic inert components.

[0040] Furthermore, the initial softening temperature refers to the temperature at which the coal sample begins to enter a continuous plastic state during the thermoplasticity test; the maximum fluidity temperature refers to the temperature at which the coal sample reaches its maximum fluidity; and the solidification temperature refers to the temperature at which the coal sample falls back from the plastic state and enters a basically solidified state. These three thermoplastic parameters are obtained using the same thermoplasticity test system to ensure consistency in the physical quantities of the parameters. The organic inert component content parameter is obtained through coal petrographic analysis and is used to characterize the level of organic inert components that influence the support conditions of the target coal skeleton for the corresponding coal type.

[0041] In this embodiment, the plastic coordination parameters include plastic overlap width and peak misalignment. The plastic overlap width is determined by the following method: the higher of the initial softening temperatures of bituminous coal and coking coal is used as the plastic overlap starting temperature, the lower of the solidification temperatures of bituminous coal and coking coal is used as the plastic overlap ending temperature, and the difference between the plastic overlap ending temperature and the plastic overlap starting temperature is used as the plastic overlap width. The peak misalignment is the absolute value of the temperature difference corresponding to the maximum fluidity of bituminous coal and coking coal.

[0042] Furthermore, the plastic overlap width is used to characterize the effective overlap interval length between bituminous coal and coking coal in the thermoplastic stage, and the peak misalignment is used to characterize the temperature position difference when bituminous coal and coking coal reach their respective thermoplastic peaks. The above parameters are determined according to the following formula:

[0043]

[0044]

[0045]

[0046] In the formula, This indicates the initial softening temperature of bituminous coal. This indicates the initial softening temperature of coking coal. Indicates the solidification temperature of bituminous coal This indicates the solidification temperature of coking coal. This indicates the temperature corresponding to the maximum fluidity of bituminous coal. This indicates the temperature corresponding to the maximum fluidity of coking coal. Indicates the temperature at which plastic overlap begins. Indicates the end temperature of plastic overlap. Indicates the plastic overlap width. This indicates the peak misalignment.

[0047] when At that time, it was determined that there was no effective overlap between bituminous coal and coking coal within the thermoplastic range, and the current controlled batch did not meet the plastic synergy condition.

[0048] In this embodiment, the skeleton constraint range is the allowable range of weighted organic inert component content of the target blended coal; The weighted organic inert component content of the target blended coal is determined based on the mass fraction of bituminous coal and coking coal in the target dry basis blending ratio and their respective organic inert component content. When the plastic overlap width is not less than the preset minimum overlap width, the peak misalignment is not higher than the preset maximum misalignment, and the weighted organic inert component content of the target blended coal falls within the skeleton constraint range, it is determined that the current control batch is within the dual-coal plastic synergistic stability window.

[0049] Furthermore, let the mass fraction of bituminous coal in the target dry basis blend be... The mass fraction of coking coal in the target dry basis blend is: The content of organic inert components in bituminous coal is The content of organic inert components in coking coal is The weighted organic inert component content of the target blended coal Determine using the following formula:

[0050] And satisfy:

[0051] If the skeleton constraint interval is denoted as The condition for the current control batch to meet the dual-coal plasticity synergistic stability window is as follows:

[0052]

[0053]

[0054] In the formula, This indicates the weighted content of organic inert components in the target blended coal. and

[0055] These represent the lower and upper limits of the skeleton constraint interval, respectively. Indicates the preset minimum overlap width. This indicates the preset maximum misalignment amount. Through the above method, the synergistic stability window of the two coal types is jointly defined by the plastic overlap width, the peak misalignment amount, and the weighted organic inert component content. Its boundaries are clear and can be directly connected with the subsequent steps for determining the target dry basis ratio.

[0056] In this embodiment, the preset minimum overlap width, preset maximum misalignment, skeleton constraint range, preset moisture difference threshold, preset moisture deviation threshold, preset particle size threshold, and preset single batch adjustment range are all determined based on the coking quality requirements of the target blended coal, combined with the test results of multiple consecutive stable control batches under the corresponding production conditions and the results of pre-blending.

[0057] The aforementioned preset quantities correspond to the determination of the plastic synergistic stability window of the two coals, the determination of the anomaly in the conversion of the actual wet basis feed amount based on the moisture difference, the identification of the stratification after the deviation of the blended coal, and the limitation of the adjustment range of the target dry basis ratio, so that the determination criteria used in different determination links can be distinguished from each other and matched with the corresponding control steps.

[0058] In this embodiment, step S3, which involves converting the target dry basis ratio into the actual wet basis feed amounts for bituminous coal and coking coal respectively, includes: The dry matter mass ratio corresponding to the actual wet basis feed amount of bituminous coal is determined based on the measured moisture content of the bituminous coal. The dry matter mass ratio corresponding to the actual wet basis feed amount of coking coal is determined based on the measured moisture content of the coking coal. Based on the dry matter distribution relationship corresponding to the target dry basis ratio, the actual wet basis feed rate of bituminous coal and the actual wet basis feed rate of coking coal are determined respectively. When the measured moisture difference between bituminous coal and coking coal exceeds the preset moisture difference threshold, the actual wet basis feed rate of the coal type with abnormal moisture difference is adjusted first, and then the blending is performed.

[0059] Furthermore, let the target total dry coal quality for the current controlled batch be... The target dry basis mass fraction of bituminous coal is The target dry basis mass fraction of coking coal is The measured moisture content of bituminous coal is The measured moisture content of coking coal is The actual wet basis feed amount of bituminous coal Actual wet basis feed rate of coking coal Determine them according to the following formulas:

[0060]

[0061] In the formula, This indicates the target total dry coal quality for the current control batch. This indicates the actual wet basis feed amount of bituminous coal. This indicates the actual wet basis feed rate of coking coal. This indicates the measured moisture content of the bituminous coal. This indicates the measured moisture content of the coking coal.

[0062] When the measured moisture difference between bituminous coal and coking coal meets the following conditions:

[0063] If the moisture difference between the two coal types exceeds the allowable range, it indicates that there is an abnormality in the moisture content between the two coal types. In this embodiment, the coal type with the abnormal moisture content is preferably the coal type whose measured moisture content deviates more from the corresponding moisture parameter used in S3 to convert the actual wet basis feed amount.

[0064] in, This represents the preset moisture difference threshold between the two coal types, used to determine whether there is an abnormal moisture difference exceeding the allowable range between bituminous coal and coking coal. In this case, the actual wet basis feed amount of the coal type with the abnormal moisture difference is first corrected before blending is performed.

[0065] In this embodiment, the preset target particle size distribution includes the target particle size distribution of bituminous coal and the target particle size distribution of coking coal. The target particle size distribution of bituminous coal and the target particle size distribution of coking coal correspond to the upper limit of the target fine particle size ratio and the upper limit of the target coarse particle size ratio of their respective coal types. The particle size deviation includes fine-grained exceeding deviation and coarse-grained exceeding deviation; When there is an excessive deviation in fine particles in bituminous coal or coking coal, adjust the crushing parameters of the coal type to reduce the proportion of fine particles in the coal type. When there is an excessive deviation in coarse particles in bituminous coal or coking coal, the crushing parameters of the coal type are adjusted to reduce the proportion of coarse particles in the coal type. If, after adjusting the crushing parameters, there is still a particle size deviation exceeding the preset particle size threshold, the actual wet basis feed amount of the coal type with the particle size deviation is compensated and corrected.

[0066] Furthermore, let the proportions of fine and coarse particles after bituminous coal crushing be respectively... and The proportions of fine and coarse particles after coking coal crushing are respectively and The corresponding target upper limits are respectively , , and Grain size deviation is determined to have occurred when any of the following conditions are met:

[0067]

[0068]

[0069] In the formula, and These represent the proportion of fine particles in bituminous coal and coking coal, respectively. and These represent the proportion of coarse particles in bituminous coal and coking coal, respectively.

[0071] If, after adjusting the crushing parameters, a particle size deviation exceeding the preset threshold still exists, then the actual wet basis feed rate of the coal type exhibiting the particle size deviation will be compensated and corrected. Let the original actual wet basis feed rate of this coal type be... The compensation correction amount is The corrected actual wet basis feed rate for:

[0072] In the formula, This indicates the original actual wet basis feed rate for the coal type where particle size deviation occurred. This indicates the feed compensation correction amount for this type of coal. This indicates the actual wet basis feed rate after compensation and correction. Therefore, the technical action corresponding to particle size compensation and correction is clearly the correction of the actual wet basis feed rate.

[0073] Furthermore, the compensation correction is not an isolated adjustment of the feed rate of a single coal type, but rather a simultaneous verification of the dry basis quality allocation relationship of the two coal types after conversion, while maintaining the current control batch target total dry coal quality constraint.

[0074] In this embodiment, the target verification interval consists of a target initial softening temperature interval, a target maximum fluidity temperature interval, and a target solidification temperature interval, which are set corresponding to the dual-coal plasticity synergistic stability window. When the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal all fall within their respective target ranges, it is determined that the blended coal has not deviated from the target verification range. If at least one of the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal does not fall within the corresponding target range, the blended coal is determined to deviate from the target verification range.

[0075] Furthermore, let the initial softening temperature of the blended coal be... The temperature corresponding to the maximum fluidity of the blended coal is The solidification temperature of the blended coal is Then the target verification interval can be expressed as:

[0076]

[0077]

[0078] In the formula, and These represent the lower and upper limits of the target initial softening temperature range, respectively. and These represent the lower and upper limits of the temperature range corresponding to the target maximum flowability, respectively. and These represent the lower and upper limits of the target solidification temperature range, respectively. When the synergistic stability window of the two coal materials corresponding to the current feedback judgment is established, and the target verification range corresponding to the feedback verification is also satisfied, it indicates that the parameter judgment of the current control batch is consistent with the actual mixing result.

[0079] In this embodiment, the order in which the causes of deviation are identified in step S6 is as follows: First, the measured moisture content of bituminous coal and coking coal in the current controlled batch is compared with the corresponding moisture parameters used in S3 to convert the actual wet basis feed amount. When the moisture deviation of any coal type exceeds the preset moisture deviation threshold, the deviation of the current controlled batch is determined to be moisture deviation. If the deviation is not determined to be due to moisture, the actual particle size distribution of bituminous coal and coking coal in the current controlled batch is compared with the preset target particle size distribution. When the particle size deviation of any coal type exceeds the preset particle size threshold, the deviation of the current controlled batch is determined to be due to particle size deviation. If the deviation is not determined to be due to moisture content or particle size, the cause of the deviation in the current controlled batch will be determined to be coal quality deviation.

[0080] Furthermore, let the real-time moisture content of the bituminous coal and coking coal in the current controlled batch be respectively... and The moisture parameters used in the S3 conversion are as follows: and Then, if the following conditions are met:

[0081] or

[0082] When this occurs, the currently controlled batch is determined to have a moisture deviation, whereby... This represents the preset moisture deviation threshold of the real-time moisture content of a single coal type relative to the corresponding moisture parameter in S3 used to convert the actual wet basis feed amount.

[0083] If the deviation is not determined to be moisture, the particle size distribution is further compared. If the particle size distribution deviates from the preset target particle size distribution by more than the preset particle size threshold, it is determined to be a particle size deviation. Only when neither moisture deviation nor particle size deviation occurs is it determined to be a coal quality deviation.

[0084] After determining that the coal quality is deviated, the bituminous coal and coking coal are resampled and tested. The thermoplastic parameters and petrographic parameters obtained from the retest are compared with the corresponding parameters obtained in S1 for the current control batch in order to identify the coal type that has deviated.

[0085] In this embodiment, when the deviation is due to coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is adjusted according to the deviation of the thermoplastic verification parameters of the blended coal relative to the target verification range. The adjustment satisfies the following conditions: the plastic overlap width corresponding to the adjusted target dry basis ratio increases, the peak misalignment decreases, and the weighted organic inert component content of the target blended coal remains within the skeleton constraint range; The adjustment of the target dry basis ratio is limited by a preset single-batch adjustment range, which is the maximum target dry basis ratio adjustment allowed to be performed within a single control batch. When multiple consecutive control batches are determined to have coal quality deviations, the coal types that have been identified as having coal quality deviations after continuous retesting will no longer be used for blending in subsequent control batches according to the current target dry basis ratio. Instead, based on the re-acquired thermoplastic parameters, petrographic parameters, and moisture parameters of the coal type, and combined with the corresponding parameters of another coal type in the current control batch, a new dual-coal plasticity synergistic stability window will be established, and the target dry basis ratio between bituminous coal and coking coal and their respective actual wet basis feed rates will be re-determined.

[0086] Furthermore, let the mass fractions of bituminous coal and coking coal under the original target dry basis ratio be respectively... and The adjusted quality fractions are respectively and The adjustment amount per batch is Then we have:

[0087]

[0088] And satisfy:

[0089] In the formula, This indicates the maximum adjustment range for a single batch.

[0090] Therefore, the sum of the mass fractions of bituminous coal and coking coal after adjustment remains at 1. Thus, when correcting the target dry basis ratio within the preset adjustment range for a single batch, it can both limit the adjustment range for a single batch from being too large and maintain the stability of the adjusted target dry basis ratio relationship.

[0091] In practical implementation, when the deviation is due to coal quality issues, the control device determines the single-coal parameters that need to be re-acquired in the next control batch based on the deviation of the thermoplastic verification parameters of the blended coal relative to the target verification range. Then, based on the re-acquired thermoplastic parameters, coal petrographic parameters, and moisture parameters, it recalculates the plastic overlap width, peak misalignment, weighted organic inert component content, dual-coal plastic synergistic stability window, target dry basis ratio, and actual wet basis feed rate. Therefore, the increased plastic overlap width and decreased peak misalignment corresponding to the adjusted target dry basis ratio indicate that after re-acquiring the single-coal parameters and reconstructing the dual-coal plastic synergistic stability window in the next control batch, the newly determined plastic synergistic parameters corresponding to the target dry basis ratio satisfy the aforementioned direction of change.

[0092] When multiple consecutive control batches are determined to have coal quality deviations, the coal types identified as having deviations after continuous retesting are no longer used for blending in subsequent control batches according to the current target dry basis blending ratio. Instead, based on the re-acquired thermoplastic parameters, petrographic parameters, and moisture parameters of that coal type, combined with the corresponding parameters of another coal type in the current control batches, a new dual-coal plasticity synergistic stability window is established, and the target dry basis blending ratio between bituminous coal and coking coal, as well as their respective corresponding actual wet basis feed rates, are re-determined. This process ensures that the coal quality deviation correction is consistent with the aforementioned logic for establishing the dual-coal plasticity synergistic stability window.

[0093] In this embodiment, the above steps are linked together to form a complete control chain. Specifically, S1 is used to obtain the single coal parameters of the current control batch, S2 is used to establish a dual coal plasticity synergistic stability window based on the single coal parameters, S3 is used to complete the conversion of the actual wet basis feed amount according to the target dry basis ratio, S4 is used to adjust the crushing and feed compensation correction for particle size deviation, S5 is used to perform feedback verification of the blending results through the thermoplastic verification parameters of the blending coal, and S6 is used to identify the causes of deviation in a layered manner and perform corresponding corrections, thereby forming a closed-loop control process for the next control batch.

[0094] The working principle of this embodiment is as follows: First, the bituminous coal and coking coal in the current controlled batch are sampled and tested to obtain their respective initial softening temperature, maximum fluidity corresponding temperature, solidification temperature, organic inert component content, and measured moisture parameters.

[0095] Subsequently, the starting temperature and ending temperature of plastic overlap were determined based on the initial softening temperature and solidification temperature of bituminous coal and coking coal, and the plastic overlap width was further obtained; the peak misalignment was determined based on the temperature difference corresponding to the maximum fluidity of the two coal types; and the weighted organic inert component content of the target blended coal was determined by combining the mass fraction of the two coal types in the target dry basis ratio and their respective organic inert component content.

[0096] Only when the plastic overlap width is not less than the preset minimum overlap width, the peak misalignment is not higher than the preset maximum misalignment, and the weighted organic inert component content of the target blended coal falls within the skeleton constraint range, is the current controlled batch determined to be within the dual-coal plastic synergistic stability window, and the target dry basis ratio of the current controlled batch is determined within this window.

[0097] Then, based on the measured moisture content of bituminous coal and coking coal, the target dry basis ratio is converted into the actual wet basis feed amount corresponding to each of the two coal types, so that the wet basis feed result at the execution level can correspond to the predetermined dry basis quality distribution relationship.

[0098] After determining the target dry basis ratio and the actual wet basis feed amount, the bituminous coal and coking coal were crushed respectively, and the actual particle size distribution after crushing was detected.

[0099] When the proportion of fine or coarse particles in any coal type exceeds the corresponding target upper limit, it is determined that there is a particle size deviation in that coal type, and the particle size formation process is corrected first by adjusting the crushing parameters. If the particle size deviation still does not return to the allowable range after adjustment, the actual wet basis feed rate of the coal type with particle size deviation is compensated and corrected. The compensation and correction does not change the feed rate of a single coal type in isolation, but rather, under the premise of maintaining the current control batch target total dry coal quality constraint, the dry basis quality distribution relationship of the two coal types is re-verified to ensure that the feed result after compensation and correction still meets the dual-coal plasticity synergistic stability window.

[0100] After blending based on the corrected actual wet basis feed amount, the resulting blended coal is subjected to thermoplasticity testing to obtain thermoplasticity verification parameters of the blended coal, and compared with the pre-established target verification range. When the initial softening temperature, maximum flowability temperature and solidification temperature of the blended coal all fall within the corresponding target range, it indicates that the parameter judgment of the current control batch is consistent with the actual blending result. When at least one parameter does not fall within the corresponding target range, it indicates that the current control batch has deviated.

[0101] After determining that a deviation has occurred in the current control batch, the causes of the deviation are identified sequentially according to a preset order. First, the measured moisture content of bituminous coal and coking coal in the current control batch is compared with the corresponding moisture parameters used when converting the actual wet basis feed amount using S3. When the moisture deviation of any coal type exceeds the preset moisture deviation threshold, the cause of the deviation is determined to be moisture deviation, and the actual wet basis feed amount of the coal type with moisture deviation is corrected. If the deviation is not determined to be due to moisture content, the actual particle size distribution of the two coal types is further compared with the preset target particle size distribution. When the particle size deviation of either coal type exceeds the preset particle size threshold, the deviation is determined to be due to particle size deviation. The crushing parameters are adjusted first in the manner described above, and then the feeding compensation correction is performed as appropriate. Only when neither moisture deviation nor particle size deviation occurs is the deviation attributed to coal quality deviation. For coal quality deviation, bituminous coal and coking coal are re-sampled and tested, and the re-tested thermoplastic parameters and petrographic parameters are compared with the corresponding parameters initially collected for the current controlled batch to identify the coal type where the deviation occurred. Based on this, the target dry basis ratios of bituminous coal and coking coal are adjusted according to the deviation of the thermoplastic verification parameters of the blended coal from the target verification range. The plastic overlap width corresponding to the adjusted target dry basis ratio is increased and the peak misalignment is reduced, while the weighted organic inert component content of the target blended coal is kept within the skeleton constraint range.

[0102] If multiple consecutive control batches are determined to have coal quality deviations, the coal types that have been identified as having coal quality deviations after continuous retesting will no longer be used for blending in subsequent control batches according to the current target dry basis ratio. Instead, based on the re-acquired thermoplastic parameters, petrographic parameters, and moisture parameters of the coal type, and combined with the corresponding parameters of another coal type in the current control batch, a new dual-coal plasticity synergistic stability window will be established, and the target dry basis ratio between bituminous coal and coking coal and their respective actual wet basis feed rates will be re-determined.

[0103] Thus, the entire control process forms a closed-loop control mechanism based on the acquisition of single coal parameters, with the plastic synergistic stability window of dual coal as the feedforward constraint, the thermoplastic verification of blended coal as the feedback basis, and the hierarchical correction of moisture deviation, particle size deviation and coal quality deviation as the adjustment path, thereby improving the coking stability during the blending of bituminous coal and coking coal.

[0104] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for controlling the coking stabilization of a blend of bituminous coal and coking coal, characterized in that, Includes the following steps: S1. Obtain the first thermoplastic parameters, first coal petrographic parameters, and first moisture parameters of the bituminous coal to be blended in the current controlled batch, as well as the second thermoplastic parameters, second coal petrographic parameters, and second moisture parameters of the coking coal to be blended. S2. Determine the plastic synergy parameters of bituminous coal and coking coal based on the first thermoplastic parameters and the second thermoplastic parameters, determine the skeleton constraint range of the target blended coal based on the first coal petrographic parameters and the second coal petrographic parameters, and determine the parameter range that satisfies the preset plastic synergy conditions and whose weighted organic inert component content of the target blended coal falls into the skeleton constraint range as the dual coal plastic synergy stability window. S3. Determine the target dry basis ratio of bituminous coal and coking coal within the plastic synergistic stability window of the two coals, and convert the target dry basis ratio into the actual wet basis feed amount of bituminous coal and coking coal respectively according to the first moisture parameter and the second moisture parameter. S4. Crush bituminous coal and coking coal separately, obtain the actual particle size distribution after crushing, and compare the actual particle size distribution of bituminous coal and coking coal with the preset target particle size distribution to determine whether there is a particle size deviation; when there is a particle size deviation, first adjust the crushing parameters of the coal type with particle size deviation; if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, compensate and correct the actual wet basis feed amount of the coal type with particle size deviation while maintaining the establishment of the dual coal plasticity synergistic stability window; S5. Mix bituminous coal and coking coal according to the corrected actual wet basis feed amount, obtain the thermoplastic verification parameters of the blended coal, and determine whether the blended coal deviates from the target verification interval set corresponding to the dual coal plasticity synergistic stability window based on the thermoplastic verification parameters. S6. When the blended coal deviates from the target verification range, the cause of deviation is identified as moisture deviation, particle size deviation, or coal quality deviation according to the preset judgment order, and the following corrections are performed based on the identification results: When the cause of deviation is moisture deviation, the actual wet basis feed amount of the coal type with moisture deviation is corrected; when the cause of deviation is particle size deviation, the crushing parameters of the coal type with particle size deviation are adjusted, and if there is still a particle size deviation exceeding the preset particle size threshold after adjusting the crushing parameters, the actual wet basis feed amount of the coal type is compensated and corrected; when the cause of deviation is coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is corrected; and the blending, thermoplastic verification, and deviation correction are repeated in the next control batch.

2. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 1, characterized in that, Both the first thermoplastic parameter and the second thermoplastic parameter include the initial softening temperature, the temperature corresponding to the maximum flowability, and the curing temperature; Both the first and second coal petrographic parameters are parameters of the content of organic inert components.

3. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 2, characterized in that, The plasticity coordination parameters include plasticity overlap width and peak misalignment. The plastic overlap width is determined by the following method: the higher of the initial softening temperatures of bituminous coal and coking coal is used as the plastic overlap starting temperature, the lower of the solidification temperatures of bituminous coal and coking coal is used as the plastic overlap ending temperature, and the difference between the plastic overlap ending temperature and the plastic overlap starting temperature is used as the plastic overlap width. The peak misalignment is the absolute value of the temperature difference corresponding to the maximum fluidity of bituminous coal and coking coal.

4. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 3, characterized in that, The skeleton constraint range is the allowable range of weighted organic inert component content for the target blended coal; The weighted organic inert component content of the target blended coal is determined based on the mass fraction of bituminous coal and coking coal in the target dry basis blending ratio and their respective organic inert component content. When the plastic overlap width is not less than the preset minimum overlap width, the peak misalignment is not higher than the preset maximum misalignment, and the weighted organic inert component content of the target blended coal falls within the skeleton constraint range, it is determined that the current control batch is within the dual-coal plastic synergistic stability window.

5. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 1, characterized in that, In step S3, the process of converting the target dry basis ratio into the actual wet basis feed amounts of bituminous coal and coking coal respectively includes: The dry matter mass ratio corresponding to the actual wet basis feed amount of bituminous coal is determined based on the measured moisture content of the bituminous coal. The dry matter mass ratio corresponding to the actual wet basis feed amount of coking coal is determined based on the measured moisture content of the coking coal. Based on the dry matter distribution relationship corresponding to the target dry basis ratio, the actual wet basis feed rate of bituminous coal and the actual wet basis feed rate of coking coal are determined respectively. When the measured moisture difference between bituminous coal and coking coal exceeds the preset moisture difference threshold, the actual wet basis feed rate of the coal type with abnormal moisture difference is adjusted first, and then the blending is performed.

6. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 1, characterized in that, The preset target particle size distribution includes the target particle size distribution of bituminous coal and the target particle size distribution of coking coal. The target particle size distribution of bituminous coal and the target particle size distribution of coking coal correspond to the upper limit of the target fine particle size ratio and the upper limit of the target coarse particle size ratio of their respective coal types. The particle size deviation includes fine-grained exceeding deviation and coarse-grained exceeding deviation; When there is an excessive deviation in fine particles in bituminous coal or coking coal, adjust the crushing parameters of the coal type to reduce the proportion of fine particles in the coal type. When there is an excessive deviation in coarse particles in bituminous coal or coking coal, the crushing parameters of the coal type are adjusted to reduce the proportion of coarse particles in the coal type. If, after adjusting the crushing parameters, there is still a particle size deviation exceeding the preset particle size threshold, the actual wet basis feed amount of the coal type with the particle size deviation is compensated and corrected.

7. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 1, characterized in that, The target verification interval consists of a target initial softening temperature interval, a target maximum fluidity temperature interval, and a target solidification temperature interval, which are set corresponding to the dual-coal plasticity synergistic stability window. When the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal all fall within their respective target ranges, it is determined that the blended coal has not deviated from the target verification range. If at least one of the initial softening temperature, the temperature corresponding to the maximum fluidity, and the solidification temperature of the blended coal does not fall within the corresponding target range, the blended coal is determined to deviate from the target verification range.

8. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 7, characterized in that, In step S6, the order for identifying the causes of deviation is as follows: First, the measured moisture content of bituminous coal and coking coal in the current controlled batch is compared with the corresponding moisture parameters used in S3 to convert the actual wet basis feed amount. When the moisture deviation of any coal type exceeds the preset moisture deviation threshold, the deviation of the current controlled batch is determined to be moisture deviation. If the deviation is not determined to be due to moisture, the actual particle size distribution of bituminous coal and coking coal in the current controlled batch is compared with the preset target particle size distribution. When the particle size deviation of any coal type exceeds the preset particle size threshold, the deviation of the current controlled batch is determined to be due to particle size deviation. If the deviation is not determined to be due to moisture content or particle size, the cause of the deviation in the current controlled batch will be determined to be coal quality deviation.

9. The method for controlling the coking stabilization of a blend of bituminous coal and coking coal according to claim 8, characterized in that, When the deviation is due to coal quality deviation, the target dry basis ratio of bituminous coal and coking coal is adjusted according to the deviation of the thermoplastic verification parameters of the blended coal relative to the target verification range. The adjustment satisfies the following conditions: the plastic overlap width corresponding to the adjusted target dry basis ratio increases, the peak misalignment decreases, and the weighted organic inert component content of the target blended coal remains within the skeleton constraint range; The adjustment of the target dry basis ratio is limited by a preset single-batch adjustment range, which is the maximum target dry basis ratio adjustment allowed to be performed within a single control batch. When multiple consecutive control batches are determined to have coal quality deviations, the coal types that have been identified as having coal quality deviations after continuous retesting will no longer be used for blending in subsequent control batches according to the current target dry basis ratio. Instead, based on the re-acquired thermoplastic parameters, petrographic parameters, and moisture parameters of the coal type, and combined with the corresponding parameters of another coal type in the current control batch, a new dual-coal plasticity synergistic stability window will be established, and the target dry basis ratio between bituminous coal and coking coal and their respective actual wet basis feed rates will be re-determined.

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