A sintering machine mixture preheating temperature control method and moisture temperature control method

Abstract

The present invention discloses a sintering machine mixture preheating temperature control method and a moisture temperature control method, comprising the following steps: dividing the width direction of the distributor into multiple temperature monitoring areas and the width direction of the mixing hopper into multiple preheating adjustment areas; judging whether the difference between each current temperature Ti and the current overall average temperature K1 is greater than a first preset threshold value e1; if it is greater than the first preset threshold value e1, adjusting the preheating structure; S3, judging whether the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2; if it is greater than the second preset threshold value e2, adjusting the preheating structure. The present invention divides the monitoring position into multiple temperature monitoring areas and the heating position into multiple preheating adjustment areas, thereby achieving precise monitoring and adjustment, and realizing preheating uniformity control through partitioned monitoring and adjustment, and finally adjusting the overall temperature through step S3 to achieve precise control and adjustment of preheating.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering, and in particular to a method for controlling the preheating temperature of a sintering machine mixture and a method for controlling the moisture temperature. Background Art

[0002] Existing sintering machines typically feature a preheating structure (steam pipe nozzles) arranged in a ring on the central wall of the mixing hopper. This preheating structure (steam pipe nozzles) heats the mixture, raising its temperature and thus reducing the sintering machine's fuel consumption. Existing preheating systems for the mixture lack automatic regulation and typically monitor and control an overall temperature. However, due to the varying distances between the mixture and the preheating structure in the mixing hopper, temperatures vary. Traditional temperature monitoring and control methods cannot effectively ensure preheating uniformity, resulting in poor temperature uniformity, poor process consistency, and ultimately, inconsistent product quality. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for controlling the preheating temperature of a sintering machine mixture, which can effectively improve the preheating uniformity.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for controlling the preheating temperature of a sintering machine mixture comprises the following steps:

[0006] S1, dividing the distributor into i temperature monitoring areas Li along the width direction of the distributor, and dividing the cross section of the mixing hopper where the preheating structure is located into i preheating adjustment areas Yi along the width direction of the mixing hopper, wherein the temperature monitoring areas Li correspond to the preheating adjustment areas Yi one-to-one, and i is a positive integer greater than 1;

[0007] S21, obtaining the current temperature Ti of the mixture in each temperature monitoring area Li, and determining whether the difference between each current temperature Ti and the current overall average temperature K1 is greater than a first preset threshold e1, where the current overall average temperature K1 is the average value of all the current temperatures Ti;

[0008] S22, if the difference between the current temperature Ti and the current overall average temperature K1 is greater than the first preset threshold e1, determining the temperature monitoring area Li corresponding to the current temperature Ti as a temperature area requiring adjustment;

[0009] S23, adjusting the preheating structure of the preheating adjustment zone Yi corresponding to the temperature zone to be adjusted, and returning to step S21 until the difference between all the current temperatures Ti and the current overall average temperature K1 is no greater than the first preset threshold e1, and then proceeding to step S3;

[0010] S3, determine whether the difference between the current overall average temperature K1 and the target temperature K is greater than the second preset threshold value e2; if the difference between the current overall average temperature K1 and the target temperature K is greater than the second preset threshold value e2, adjust the preheating structure until the difference between the current overall average temperature K1 and the target temperature K is less than or equal to the second preset threshold value e2.

[0011] Furthermore, if the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted, specifically including:

[0012] S31, adjusting the preheating structure according to the difference between the current overall average temperature K1 and the target temperature K;

[0013] S32, return to step S21.

[0014] Furthermore, step S31 specifically includes:

[0015] If the current overall average temperature K1 is greater than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted downward by z j ;

[0016] If the current overall average temperature K1 is lower than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted upward. j ;

[0017] z j =|K-K1|×a×b j , where z j is the adjustment amount of the preheating structure for the jth execution of step S31, a is the adjustment amount of the preheating structure corresponding to a unit temperature change, b j is the adjustment coefficient of the preheating structure of the jth execution of step S31, where b j >b j+1 , j is a positive integer.

[0018] Furthermore, the preheating structure includes a steam main pipe and a steam nozzle, a first regulating valve is installed on the air inlet pipe of the steam main pipe, and a second regulating valve is installed on the steam nozzle. The steam main pipe is arranged around the outer periphery of the mixing hopper, and the steam nozzles are arranged along the extension direction of the steam main pipe. The steam nozzles are provided in multiple groups and correspond to different preheating adjustment areas Yi respectively; the preheating structure of the preheating adjustment area Yi corresponding to the temperature area to be adjusted specifically includes: adjusting the second regulating valve of the preheating adjustment area Yi corresponding to the temperature area to be adjusted.

[0019] Furthermore, if the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted, specifically including: adjusting the first regulating valve.

[0020] Furthermore, the time difference between the adjustment of the preheating structure and the appearance and monitoring of the temperature adjustment effect is the temperature adjustment time delay t;

[0021] in L is the vertical height from the steam nozzle to the monitoring position of the infrared thermometer, v is the rotation speed of the unloading roller, and t0 is the comprehensive delay time.

[0022] The present invention also provides a method for controlling the temperature of preheated water of a sintering machine mixture, comprising the following steps:

[0023] A1, dividing the cross section of the steam structure of the mixing hopper into a plurality of humidity control areas Ni along the width direction of the mixing hopper, and dividing the distributor into a plurality of humidity monitoring areas Mi along the width direction of the distributor, wherein the humidity control areas Ni are arranged in a one-to-one correspondence with the humidity monitoring areas Mi, and the humidity control area Ni is divided into two sub-processing areas along the length direction of the mixing hopper;

[0024] A21, obtaining the current moisture content Si of the mixed material in each of the humidity monitoring areas Mi, and determining whether the difference between each current moisture content Si and the current overall average moisture content W1 is greater than a third preset threshold value e3;

[0025] A22: If the difference between the current moisture content Si and the current overall average moisture content W1 is greater than the third preset threshold value e3, the humidity monitoring area Mi corresponding to the current moisture content Si is determined as an area requiring humidity adjustment; wherein the current overall average moisture content W1 is the average of the current moisture contents Si of all the humidity monitoring areas Mi;

[0026] A23, monitoring the moisture content of the sub-processing area corresponding to the area requiring humidity adjustment, and adjusting the steam structure according to the moisture content monitoring data, then returning to step A21, until the difference between the current moisture content Si of all the humidity monitoring areas Mi and the current overall average moisture content W1 is less than or equal to the third preset threshold value e3; then proceeding to step A3;

[0027] A3, determining whether the difference between the current overall average moisture content W1 and the target moisture content W is greater than a fourth preset threshold value e4; if the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, adjusting the steam structure until the difference between the current overall average moisture content W1 and the target moisture content W is less than or equal to the fourth preset threshold value e4;

[0028] Execute the sintering machine mixture preheating temperature control method according to any one of claims 1 to 6.

[0029] Furthermore, if the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, the steam structure is adjusted, specifically including:

[0030] A31, if the current overall average moisture content W1 is greater than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted downward by G j If the current overall average moisture content W1 is less than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted upward G j ; Among them G j =|W1-W|×A×B j ; G j is the steam structure adjustment amount of the jth execution of step A31, A is the steam structure adjustment amount corresponding to the unit water content change, B j is the adjustment coefficient of the steam structure when step A31 is executed for the jth time, where B j >B j+1 ;

[0031] A32, return to step A21.

[0032] Furthermore, the preheating structure and the steam structure are the same structure, including a steam main pipe and a steam nozzle. A first regulating valve is installed on the air inlet pipe of the steam main pipe, and a second regulating valve is installed on the steam nozzle. The steam main pipe is arranged around the outer periphery of the mixing hopper, and the steam nozzles are arranged along the extension direction of the steam main pipe. All of the preheating adjustment areas Yi and all of the sub-processing areas of the humidity adjustment area Ni correspond to steam nozzles.

[0033] Furthermore, the moisture content of the sub-processing area corresponding to the area requiring humidity adjustment is monitored, and the steam structure is adjusted according to the moisture content monitoring data, specifically including:

[0034] A231, a camera monitors the water vapor smoke emerging from the top of the mixing hopper, and obtains the water vapor smoke size of each sub-processing area Ni of the humidity adjustment area through a visual recognition algorithm;

[0035] A232, if the current moisture content Si of the humidity area that needs to be adjusted is greater than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area that needs to be adjusted is greater than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is lowered; if the current moisture content of the humidity area that needs to be adjusted is less than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area that needs to be adjusted is less than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is raised.

[0036] The present invention has the following beneficial effects: through step S1, the temperature monitoring position of the mixture is divided into multiple temperature monitoring areas, and the heating position of the mixture is divided into multiple preheating adjustment areas, and the temperature monitoring areas and the preheating adjustment areas correspond to each other, that is, when it is monitored that the temperature of the temperature monitoring area needs to be increased or decreased, the preheating structure of the corresponding preheating adjustment area can be controlled, thereby realizing precise monitoring and adjustment, improving the adjustment accuracy and precision, and under the execution of steps S21, S22, and S23, partition monitoring and adjustment are realized, and preheating uniformity control is realized. When the uniformity and consistency are guaranteed, the overall temperature is adjusted through step S3 to realize comprehensive adjustment and control of temperature uniformity and integrity, realize precise control and adjustment of preheating, improve the uniformity of preheating temperature, and improve product process consistency and quality stability.

[0037] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a flow chart of an embodiment of the sintering machine mixture preheating temperature control method of the present invention;

[0040] Figure 2It is a flow chart of an embodiment of the sintering machine mixture preheating temperature control method of the present invention;

[0041] Figure 3 This is a flow chart of an embodiment of a method for controlling the temperature of a sintering machine mixture preheated water according to the present invention;

[0042] Figure 4 is a schematic diagram of the preheating adjustment area;

[0043] Figure 5 is a schematic diagram of the temperature monitoring area;

[0044] Figure 6 It is a structural diagram of a method for controlling the temperature of preheated water of a sintering machine mixture;

[0045] Figure 7 It is a structural diagram of the mixing hopper;

[0046] Figure 8 is a schematic structural diagram of a mixing hopper in another embodiment;

[0047] Figure 9 is a schematic diagram of the humidity regulation area;

[0048] Figure 10 is a schematic diagram of the humidity monitoring area. DETAILED DESCRIPTION

[0049] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] Please refer to Figure 1 A method for controlling the preheating temperature of a sintering machine mixture in a preferred embodiment of the present invention includes steps S1, S21, S22, S23, and S3.

[0054] S1, divide the distributor 200 into i temperature monitoring areas Li along the width direction of the distributor, and divide the cross section of the preheating structure of the mixing hopper into i preheating adjustment areas Yi along the width direction of the mixing hopper 100, as shown in FIG. Figure 7 As shown, cross section a is the horizontal position of the preheating adjustment area, and the cross section is the cross section where the mixing hopper 100 is connected to the preheating structure; the temperature monitoring area Li corresponds to the preheating adjustment area Yi one by one, and i is a positive integer greater than 1.

[0055] Specifically, the width direction of the distributor 200 is consistent with the width direction of the mixing hopper 100, the multiple temperature monitoring areas Li and the multiple preheating adjustment areas Yi correspond in sequence along the width direction, and the flow direction of the mixed material is perpendicular to the width direction of the distributor 200. Figure 4 and Figure 5 As shown, i is 6, and the cross section of the mixing hopper where the preheating structure is located is along the width direction ( Figure 4 The left and right directions in the middle are divided into 6 preheating adjustment areas (Y1, Y2, Y3, Y4, Y5, Y6), and the material-facing surface of the distributor 200 is along the width direction ( Figure 5 The left and right directions in the figure are divided into 6 temperature monitoring areas (L1, L2, L3, L4, L5, and L6), and the 6 preheating adjustment areas and the 6 temperature monitoring areas are arranged in sequence along the width direction, that is, the leftmost preheating adjustment area Y1 corresponds to the leftmost temperature monitoring area L1, the preheating adjustment area Y2 corresponds to the temperature monitoring area L2, and so on. The mixture in the temperature monitoring area is the mixture output after heating in the preheating adjustment area. Usually, the side areas on both sides are narrower than the middle area. For example, in one embodiment, the width of the preheating adjustment areas on both sides is 0.2 to 0.3 m, and the width of the middle area is 0.7 to 1 m.

[0056] S21, obtain the current temperature Ti of the mixture in each temperature monitoring area Li, the current temperature Ti refers to the temperature of the mixture in the temperature monitoring area Li, and determine whether the difference between each current temperature Ti and the current overall average temperature K1 is greater than the first preset threshold e1, where the current overall average temperature K1 is the average value of all current temperatures Ti.

[0057] S22 , if the difference between the current temperature Ti and the current overall average temperature K1 is greater than the first preset threshold e1 , the temperature monitoring area Li corresponding to the current temperature Ti is determined as a temperature area requiring adjustment.

[0058] S23, adjust the preheating structure of the preheating adjustment area Yi corresponding to the temperature area to be adjusted, and return to step S21 until the difference between all current temperatures Ti and the current overall average temperature K1 is no greater than the first preset threshold e1, and enter step S3.

[0059] That is, the temperature monitoring area where the difference between the current temperature and the current overall average temperature K1 is greater than the first preset threshold value e1 is determined to be a temperature area that needs to be adjusted. The preheating adjustment area corresponding to the temperature area that needs to be adjusted is provided with a preheating structure. By adjusting the preheating structure of the preheating adjustment area corresponding to the temperature area that needs to be adjusted, the temperature of the mixed material that does not meet the temperature uniformity standard can be adjusted. For example, when the difference between the current temperature T1 of the mixed material in the temperature monitoring area L1 and the current overall average temperature K1 is greater than the first preset threshold value e1, the temperature monitoring area L1 is determined to be a temperature area that needs to be adjusted. The temperature area that needs to be adjusted corresponds to the preheating adjustment area Y1. By adjusting the preheating structure (second regulating valve 121) of the preheating adjustment area Y1, temperature uniformity can be achieved.

[0060] It is understandable that if, in step S21 , the difference between the current temperature of all temperature monitoring areas and the current overall average temperature K1 is not greater than (less than or equal to) the first preset threshold e1 , the process proceeds to the next step, ie, step S3 .

[0061] In addition, each time the preheating structure corresponding to the temperature zone to be adjusted is adjusted, the process returns to step S21, re-performs the temperature uniformity judgment, and executes the subsequent steps to avoid the preheating structure adjustment effect not meeting the standard or the subsequent impact on the overall temperature and other areas, resulting in non-standard uniformity. The current temperature of the mixture in each temperature monitoring zone can be monitored by an infrared thermometer 300. The infrared thermometer 300 can be an infrared imaging temperature measurement device or a single-point infrared temperature measurement device. In addition, the current overall average temperature K1 is the average of the monitoring temperatures of all temperature monitoring zones. The current overall average temperature K1 can be obtained by weighted averaging. Specifically, the current temperature of each temperature monitoring zone is multiplied by its own area ratio, and the average current temperature of all temperature monitoring zones is calculated. The area ratio of the temperature monitoring zone itself is the percentage of its own area to the sum of the areas of all temperature monitoring zones. The setting size of the first preset threshold e1 is related to the frequency of adjustment. To ensure infrequent adjustment, the first preset threshold e1 is preferably 4 to 6°C.

[0062] S3, determine whether the difference between the current overall average temperature K1 and the target temperature K is greater than the second preset threshold value e2; if the difference between the current overall average temperature K1 and the target temperature K is greater than the second preset threshold value e2, adjust the preheating structure until the difference between the current overall average temperature K1 and the target temperature K is less than or equal to the second preset threshold value e2; if the difference between the current overall average temperature K1 and the target temperature K is not greater than (equal to or less than) the second preset threshold value e2, stop step S3, stop the temperature adjustment, and maintain stable operation of the preheating structure. The target temperature K is the temperature that the preheating structure needs to reach. Usually, the preheating structure uses steam heating, and the target temperature K is related to the steam temperature used, preferably 50 to 80°C. The setting size of the second preset threshold value e2 is related to the frequency of adjustment. To ensure infrequent adjustment, e2 is preferably 2 to 3°C.

[0063] An embodiment of the present invention provides a method for controlling the preheating temperature of a sintering machine mixture. Through step S1, the temperature monitoring position of the mixture is divided into multiple temperature monitoring areas, and the heating position of the mixture is divided into multiple preheating adjustment areas, and the temperature monitoring areas correspond to the preheating adjustment areas. That is, when it is monitored that the temperature of the temperature monitoring area needs to be increased or decreased, the preheating structure of the corresponding preheating adjustment area can be controlled, thereby achieving precise monitoring and adjustment, improving the adjustment accuracy and precision, and under the execution of steps S21, S22, and S23, partition monitoring and adjustment are achieved, and preheating uniformity control is achieved. When the uniformity and consistency are guaranteed, the overall temperature is adjusted through step S3 to achieve comprehensive adjustment and control of temperature uniformity and integrity, achieve precise control and adjustment of preheating, improve the uniformity of preheating temperature, and improve product process consistency and quality stability. In addition, setting the temperature detection position on the distributor 200 can more objectively reflect the state of the material discharged after preheating. If the infrared temperature detector performs temperature detection on the material in the mixing hopper, it will be affected by the interference of the temperature and moisture in the mixing hopper, thereby affecting the accuracy of the mixture detection. The temperature of the mixture detected in the mixing hopper cannot truly reflect the temperature of the mixture after it is discharged from the mixing hopper. The most direct reflection of the preheating result of the mixture is the temperature of the mixture after it is discharged. Therefore, setting the temperature monitoring area on the distributor 200, which is independent of the heating area, can effectively monitor the preheating result of the mixture and improve the rationality of the process.

[0064] Reference Figure 4 Optionally, in the present invention, the preheating structure includes a steam main pipe 110 and steam nozzles 120. A first regulating valve 131 is installed on the air inlet pipe 130 of the steam main pipe 110, and a second regulating valve 121 is installed on the steam nozzles 120. The steam main pipe 110 is arranged around the periphery of the mixing hopper 100, and the steam nozzles 120 are arranged along the extension direction of the steam main pipe 110. The steam nozzles 120 are provided in multiple groups, each corresponding to a different preheating adjustment zone. That is, a group of steam nozzles 120 is provided on the side of each preheating adjustment zone to control the temperature of the corresponding preheating adjustment zone. By providing the first regulating valve 131 and the second regulating valve 121, overall adjustment and individual adjustment of each steam nozzle 120 can be achieved, and multi-dimensional adjustment can be achieved, thereby providing better adjustment conditions for temperature uniformity and overall adjustment.

[0065] In step S23, the preheating structure on the preheating adjustment area Yi corresponding to the temperature area to be adjusted is adjusted. The specific adjustment method can be:

[0066] The second regulating valve 121 of the preheating regulating area Yi corresponding to the temperature area to be adjusted is adjusted, that is, whichever temperature monitoring area is determined to be the temperature area to be adjusted, then the temperature of the preheating regulating area corresponding to the temperature area to be adjusted is adjusted, and the separate adjustment of the preheating regulating area is achieved by adjusting the second regulating valve 121 corresponding to the preheating regulating area, thereby achieving targeted temperature adjustment and ensuring the temperature uniformity and process consistency of the preheating; after the adjustment is completed and after the temperature adjustment time delay t, return to step S21, and re-perform the temperature uniformity test until the test is qualified, and then enter step S3.

[0067] In step S3, if the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted, specifically by adjusting the first regulating valve. By adjusting the air intake volume of the intake pipe 130, all preheating adjustment areas can be adjusted. By performing overall adjustment on all preheating adjustment areas, significant impacts on temperature uniformity after adjustment are minimized, and adjustment is simpler and more convenient.

[0068] Furthermore, in step S3, if the difference between the current overall average temperature K1 and the target temperature K is greater than the second preset threshold value e2, the preheating structure is adjusted, specifically including:

[0069] S31, adjusting the preheating structure according to the difference between the current overall average temperature K1 and the target temperature K;

[0070] S32, return to step S21.

[0071] Through step S31, adjustment is performed according to the temperature difference to achieve the purpose of precise adjustment, and after each adjustment, it returns to step S2 to avoid the overall temperature adjustment being not in place or affecting the temperature uniformity, resulting in temperature uniformity not meeting the standard, thereby ensuring that the adjustment effect meets the standard. The temperature adjustment will be completed only when the temperature uniformity meets the standard and the current overall average temperature meets the standard at the same time and no adjustment is required.

[0072] Reference Figure 2 In step S31, the preheating structure is adjusted according to the difference between the current overall average temperature K1 and the target temperature K. Specifically, the adjustment can be performed in the following manner:

[0073] If the current overall average temperature K1 is greater than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted downward. j ;

[0074] If the current overall average temperature K1 is lower than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted upward. j ;

[0075] z j=|K-K1|×a×b j , where z j is the adjustment amount of the preheating structure for the jth execution of step S31, a is the adjustment amount of the preheating structure corresponding to a unit temperature change, b j is the adjustment coefficient of the preheating structure of the jth execution of step S31, where b j >b j+1 , j is a positive integer.

[0076] That is, the first adjustment is a relatively large coarse adjustment, while the second and subsequent adjustments are finer adjustments with smaller adjustments. Usually, the desired effect is achieved after the first coarse adjustment and the second fine adjustment. By combining coarse and fine adjustments, precise adjustment is achieved and the number of adjustments required is reduced. Specifically, the values ​​of b1 and b2 can be set as: b1 = 85% to 90%, b2 = 50% to 60%.

[0077] When the preheating structure is a steam main 110 and a steam nozzle 120, the preheating structure is adjusted downward. j Or increase z j Both are achieved by adjusting the opening of the first regulating valve 131 , where a is the opening adjustment amount of the first regulating valve 131 corresponding to a unit temperature change.

[0078] It is understood that the time difference between the adjustment of the preheating structure and the appearance of the temperature adjustment effect and its detection is the temperature adjustment time delay t. There is a delay between each adjustment of the preheating structure and the temperature adjustment of the mixed material entering the temperature monitoring area and being detected. This delay is the temperature adjustment delay time t; L is the vertical height from the steam nozzle 120 to the monitoring position of the infrared thermometer 300, v is the rotational speed of the unloading roller 800, and t0 is the comprehensive delay time, which takes into account the time required for the control valve to operate, the temperature lag time of steam heating, and the lag time for the mixture to naturally cool after overheating, and is generally 2 to 5 minutes. Of course, t can also be obtained through experimentation. After each temperature adjustment, a time delay greater than t can be set to eliminate the impact of the temperature adjustment delay on temperature monitoring. That is, after each preheating structure adjustment, the temperature adjustment delay time t is required before returning to step S21.

[0079] Reference Figure 8 In some other embodiments, the preheating structure may include a microwave heater 700. Multiple microwave heaters 700 are provided and arranged around the mixing hopper, with at least one microwave heater 700 provided in each preheating adjustment area. Of course, the preheating structure may also include a steam main pipe 110, a steam nozzle 120, and a microwave heater 700. The microwave heater 700 serves as a supplementary heating method and can be used as a backup.

[0080] Furthermore, when the preheating structure is a microwave heater 700, in step S23, the specific method for adjusting the preheating structure may be to adjust the power of the microwave heater 700 corresponding to the temperature zone to be adjusted. In step S31, the preheating structure is adjusted downward or upward by adjusting the power of all microwave heaters 700. a corresponds to the power adjustment amount of the microwave heater 700 corresponding to a unit temperature change.

[0081] Reference Figure 3 The present invention also provides a method for controlling the temperature of a sintering machine mixture preheating water, comprising steps A1, A21, A22, A23, A3, S1, S21, S22, S23, and S3.

[0082] A1: Divide the cross section of the mixing hopper's steam structure into i humidity control zones Ni along the width of the mixing hopper. Divide the distributor into i humidity monitoring zones Mi along the width of the distributor. Humidity control zones Ni correspond one to one with humidity monitoring zones Mi, where i is a positive integer. For example, humidity control zone N1 corresponds to humidity monitoring zone M1. Humidity control zone Ni is divided into two sub-processing zones along the length of the mixing hopper.

[0083] The cross section of the mixing hopper 100 is the plane where the steam structure and the mixing hopper 100 are connected; Figure 9 and Figure 10 As shown, the cross section of the mixing hopper is along the width direction ( Figure 9 The left and right directions in the middle are divided into 6 humidity adjustment areas N1, N2, N3, N4, N5, and N6. The feeding surface of the distributor 200 is along the width direction ( Figure 10 The hopper 200 is divided into six humidity monitoring areas (in the left-right direction), M1, M2, M3, M4, M5, and M6. Six preheating and conditioning areas and six temperature monitoring areas are arranged in a one-to-one correspondence along the width of the hopper. The humidity conditioning area is divided into two sub-processing areas along the length of the mixing hopper. For example, humidity conditioning area N1 is divided into two sub-processing areas, N11 and N12, which correspond to humidity monitoring area M1. Because the mixed material flows along the length of distributor 200, the humidity monitoring area cannot be further divided along the length of distributor 200 to correspond to the sub-processing areas.

[0084] A21 obtains the current moisture content Si of the mixture in each humidity monitoring area Mi and determines whether the difference between each current moisture content Si and the current overall average moisture content W1 is greater than a third preset threshold value e3. The current moisture content can be obtained by real-time monitoring of the humidity monitoring area using an infrared moisture detector 400.

[0085] A22: If the difference between the current moisture content Si and the current overall average moisture content W1 is greater than a third preset threshold value e3, the humidity monitoring area Mi corresponding to the current moisture content Si is determined as an area requiring humidity adjustment; the current overall average moisture content W1 is the average of the current moisture contents Si of all humidity monitoring areas Mi. If the difference between the current moisture content of all humidity monitoring areas and the current overall average moisture content W1 is less than the third preset threshold value e3, the process proceeds directly to step A3.

[0086] A23, monitor the moisture content of the sub-processing area corresponding to the area where the humidity needs to be adjusted, and adjust the steam structure according to the moisture content monitoring data, and then return to step A21 until the difference between the current moisture content Si of all humidity monitoring areas Mi and the current overall average moisture content W1 is less than or equal to the third preset threshold value e3, and enter step A3.

[0087] For example, when the difference between the current moisture content S1 and the current overall average moisture content W1 is greater than the third preset threshold value e3, the humidity monitoring area M1 corresponding to the current moisture content S1 is determined as the area requiring humidity adjustment, and the sub-processing areas corresponding to the humidity monitoring area M1 are N11 and N12. These two sub-processing areas are then monitored to adjust the corresponding steam structure, thereby achieving humidity uniformity adjustment.

[0088] Preferably, in step A23, after adjusting the steam structure, the process returns to step A21 to re-evaluate humidity uniformity and execute subsequent steps to avoid substandard humidity uniformity due to inadequate steam structure adjustment or the impact of adjustment on overall humidity and other areas. The moisture content of the mixed material in each humidity monitoring area can be monitored using an infrared moisture detector 400. Multiple infrared moisture detectors 400 can be installed along the width of the distributor 200 to ensure comprehensive monitoring of the width of the distributor 200.

[0089] Furthermore, there's a time lag between each humidity adjustment and the humidity change being detected in the humidity monitoring area. This means there's a humidity adjustment time delay between the completion of humidity adjustment and the appearance and detection of the humidity adjustment effect. Therefore, when executing step A32, the process returns to step A21 only after the humidity adjustment time delay has elapsed. When executing step A23, the process adjusts the steam structure and only after the humidity adjustment time delay has elapsed. Furthermore, the time it takes for steam to be ejected from the steam nozzle and emerge from the top of the mixing hopper is less than the humidity adjustment time delay, so the delay time is based on the humidity adjustment time delay. The humidity adjustment time delay can also be determined through empirical calculation or experimentation.

[0090] The current overall average moisture content W1 is the average of the current moisture content Si of all humidity monitoring areas Mi. The current overall average moisture content W1 can be obtained by weighted averaging. Specifically, the current moisture content Si of each humidity monitoring area Mi is multiplied by its own area ratio and the sum of the sum of the products to calculate the current overall average moisture content W1. The area ratio of the humidity monitoring area Mi is the percentage of its own area to the sum of the areas of all humidity monitoring areas Mi. For example, if the area ratio of M1 is 10%, and the corresponding current moisture content S1 is 4%, then multiply the two values ​​and calculate the remaining 5 areas in this way. Then, add the obtained 6 values ​​to obtain the current overall average moisture content W1. The setting size of the third preset threshold e3 is related to the frequency of adjustment. To ensure infrequent adjustment, the third preset threshold e3 is preferably a moisture content of 1% to 2%.

[0091] A3 determines whether the difference between the current overall average moisture content W1 and the target moisture content W is greater than a fourth preset threshold value e4. If the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, the steam structure is adjusted until the difference between the current overall average moisture content W1 and the target moisture content W is less than or equal to the fourth preset threshold value e4. It is understood that if the difference between the current overall average moisture content W1 and the target moisture content W is not greater than the fourth preset threshold value e4, step A3 is terminated and the subsequent steps are performed. The setting value of the fourth preset threshold value e4 is related to the frequency of adjustment. To ensure infrequent adjustment, the fourth preset threshold value e4 is preferably a moisture content of 0.5% to 1%.

[0092] The present invention provides a method for controlling the humidity of preheated water in a sintering machine mixture. Through step A1, the humidity monitoring position of the mixture is divided into multiple humidity monitoring areas, and the humidification position of the mixture is divided into multiple humidity adjustment areas. The humidity monitoring areas and the humidity adjustment areas correspond to each other. That is, when it is monitored that the humidity in the humidity monitoring area needs to be increased or decreased, the steam structure of the corresponding humidity adjustment area can be controlled to achieve precise monitoring and adjustment, improve the adjustment accuracy and precision, and under the execution of steps A21, A22, and A23, partition monitoring and adjustment are achieved to achieve humidity uniformity control. When the uniformity consistency is guaranteed, the overall humidity is adjusted through step A3 to achieve comprehensive adjustment and control of humidity uniformity and integrity, improve humidity uniformity, and improve product process consistency and quality stability. In addition, setting the humidity detection position on the distributor 200 can more objectively reflect the state of the material after preheating and discharge. If the infrared moisture detector 400 performs humidity detection on the material in the mixing hopper, it will be affected by the interference of the humidity and moisture in the mixing hopper 100, thereby affecting the accuracy of the detection of the mixture. The humidity of the mixture detected in the mixing hopper 100 cannot truly reflect the humidity of the mixture after it is discharged from the mixing hopper. The most direct reflection of the effect of the humidity treatment of the mixture is the humidity of the mixture after it is discharged. Therefore, the humidity monitoring area is set on the distributor 200, and it is set independently from the humidity adjustment area. The humidity monitoring and humidity adjustment are optimized, which can effectively monitor the humidity treatment effect of the mixture and improve the rationality of the process.

[0093] Preferably, in order to avoid the interference of the water mist of the mixed material on the distributor 200 on the infrared monitoring, a demisting mechanism 500 may be provided on one side of the distributor 200, and the demisting mechanism 500 includes a nozzle 510 and a nozzle 520. The nozzle 510 is located on the side of the distributor 200 for receiving the material, and the nozzle 510 is extended along the width direction of the distributor 200. The nozzle 510 is used to connect with the air supply mechanism, and the air supply mechanism provides flowing gas to the nozzle 510 to blow away the water mist. The air supply mechanism can be an air pump or a compressed air tank; there are multiple nozzles 520, and the nozzles 520 are connected to the nozzle 510 and arranged along the extension direction of the nozzle 510. The spraying direction of the nozzle 520 is toward the distributor 200 to blow away the water mist, thereby avoiding the water mist from interfering with the detection of the infrared detector. Specifically, as Figure 6 As shown, the front side of the distributor 200 is used to contact the mixed material. The nozzle 510 is located on the front side of the distributor 200. The width of the distributor 200 is the left-right direction. The nozzle 510 extends in this direction, and the nozzles 520 are arranged in this direction. The nozzles 520 are arranged to cover the width of the distributor 200, ensuring a comprehensive water mist dispersion effect.

[0094] Preferably, the preheating structure and the steam structure are the same structure, including a steam main pipe 110 and a steam nozzle 120, and a first regulating valve 131 is installed on the air inlet pipe 130 of the steam main pipe 110. Figure 7 As shown, a second regulating valve 121 is installed on the steam nozzle 120. The steam main pipe 120 is arranged around the periphery of the mixing hopper 100. The steam nozzles 120 are arranged along the extension direction of the steam main pipe. All preheating adjustment areas and all sub-processing areas of the humidity adjustment area correspond to steam nozzles 120. To facilitate the arrangement of steam nozzles and facilitate the control of temperature and humidity, the humidity adjustment areas N1, N2, N3, N4, N5, and N6 are respectively the same area as the preheating adjustment areas Y1, Y2, Y3, Y4, Y5, and Y6, and the humidity monitoring areas M1, M2, M3, M4, M5, and M6 are respectively the same area as the temperature monitoring areas L1, L2, L3, L4, L5, and L6. That is, the humidity and temperature adjustment areas are divided in the same manner and size. By providing the first regulating valve 131 and the second regulating valve 121, overall adjustment and individual adjustment of each steam nozzle 120 can be achieved, and multi-dimensional adjustment can be achieved, thereby providing better adjustment conditions for humidity uniformity and overall adjustment. The steam structure adjustment in step A23 specifically adjusts the second regulating valve 121 to specifically adjust the humidity adjustment area where the humidity does not meet the standard. The steam structure adjustment in step A3 specifically adjusts the first regulating valve 131 to adjust all humidity adjustment areas.

[0095] In step A3, if the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, the steam structure is adjusted, specifically including:

[0096] A31, if the current overall average moisture content W1 is greater than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted downward G j If the current overall average moisture content W1 is less than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted upward G j ; Among them G j =|W1-W|×A×B j ; G j is the steam structure adjustment amount of the jth execution of step A31, A is the steam structure adjustment amount corresponding to the unit water content change, B j is the adjustment coefficient of the steam structure when step A31 is executed for the jth time, where B j >B j+1 ; j is a positive integer.

[0097] A32, return to step A21.

[0098] Specifically, the steam structure is adjusted downward or upward in step A31 through the first regulating valve 131, and A is the adjustment amount of the opening of the first regulating valve 131 corresponding to the unit water content change. j is the adjustment amount of the opening of the first regulating valve 131 when step A31 is performed for the jth time.

[0099] Through step A31, adjustment is performed according to the moisture content difference to achieve the purpose of precise adjustment, and after each adjustment, it returns to step A21 to prevent the overall humidity adjustment from affecting the humidity uniformity and causing the humidity uniformity to not meet the standard. The humidity adjustment is completed only when the humidity uniformity and the overall average humidity meet the standards at the same time and no humidity adjustment is required.

[0100] Step A3 may be repeated multiple times, with the first adjustment being a relatively large coarse adjustment, and the second and subsequent adjustments being smaller fine adjustments. Typically, the desired effect is achieved after the first coarse adjustment and the second fine adjustment. Specifically, the values ​​of B1 and B2 can be set as: B1 = 85% to 90%, B2 = 50% to 60%.

[0101] Since the mixture of the distributor 200 will flow downward to the sintering trolley 600, the mixture of the distributor 200 will continue to flow, while the monitoring position of the infrared moisture detector 400 remains unchanged. The infrared moisture detector 400 will continuously monitor the mixture passing through the monitoring position. Therefore, the humidity monitoring area cannot be further divided into areas in the length direction of the distributor 200 for monitoring and adjustment. The humidity adjustment area is not affected by this, but the mixture in the humidity adjustment area is in the mixing hopper, and it is not convenient to directly monitor the moisture content. However, it is understandable that the greater the water content, the more water vapor overflows from above it. Therefore, this principle can be used to perform step A23 to realize moisture monitoring of the sub-processing area and adjust the steam structure according to the moisture content monitoring data. Specifically, the size of the water vapor smoke monitored by the camera can be used to indirectly reflect the moisture content of the mixture, thereby realizing the monitoring of the sub-processing area of ​​the humidity adjustment area.

[0102] Therefore, in step A23, the moisture content of the sub-processing area corresponding to the area requiring humidity adjustment is monitored, and the steam structure is adjusted according to the moisture content monitoring data. This can be specifically performed through the following steps:

[0103] A231, a camera monitors the water vapor smoke coming out of the top of the mixing hopper and obtains the water vapor smoke size of the sub-processing area Ni of each humidity adjustment area through a visual recognition algorithm;

[0104] A232: If the current moisture content Si of the humidity area to be adjusted is greater than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area to be adjusted is greater than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is lowered by H. i If the current moisture content of the humidity area to be adjusted is less than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area to be adjusted is less than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is adjusted upward, and the adjustment amount of the second regulating valve is H i ; Among them H i is the adjustment amount of the second regulating valve 121 for the i-th execution of step A23. The sub-processing area corresponding to the humidity area requiring adjustment refers to the sub-processing area of ​​the humidity adjustment area corresponding to the humidity area requiring adjustment. For example, when the current moisture content S1 of the humidity monitoring area M1 is greater than the current overall average moisture content W1, the humidity monitoring area M1 is the area requiring humidity adjustment, and based on the water vapor smoke size, it is determined that the water vapor smoke size of the sub-processing area N12 is greater than the average water vapor smoke size, then the second regulating valve 121 corresponding to the sub-processing area N12 is adjusted downward by H. i .

[0105] Specifically, H i =|W1-W2|×C×D i ;

[0106] W2 is the current moisture content of the area that needs to be adjusted, H i is the adjustment amount of the second regulating valve opening when step A23 is executed for the i-th time, C is the adjustment amount of the second regulating valve opening corresponding to the unit water content change, and D i is the adjustment coefficient of the second regulating valve opening when step A22 is executed for the i-th time, where D i >D i+1 i is a positive integer. Usually, two adjustments are enough to adjust the value, D1 = 85-90%, D2 = 50%-60%

[0107] When the infrared moisture detector 400 is continuously monitoring, it may detect that the humidity in a certain humidity monitoring area fluctuates, and the difference between the monitored moisture content and the current overall average moisture content W1 is sometimes greater than the third preset threshold value e3, and sometimes not greater than the third preset threshold value e3. At this time, it may be that one of the sub-processing areas in the humidity adjustment area meets the standard, while the other sub-processing area does not meet the standard. Therefore, when it is detected that the humidity monitoring area does not meet the standard, the sub-processing area needs to be monitored and adjusted separately. Using the size of water vapor smoke as a reaction indicator of the moisture content of the mixture in the corresponding area can better monitor and identify. The measurement parameter of the water vapor smoke size is the image information entropy. The average water vapor smoke size is the average value of the image information entropy of each sub-processing area.

[0108] The calculation formula of image information entropy is:

[0109]

[0110] Where i is the average gray value, i∈[0,255]; Z i It is the ratio of the total number of pixels corresponding to the average gray value to the total number of pixels in the image.

[0111] In addition, since the higher the temperature, the larger the water vapor smoke will be, so step S23 can also be performed using this method.

[0112] In step S23, the preheating structure of the preheating adjustment area Yi corresponding to the temperature area to be adjusted is adjusted, which can be performed by the following steps:

[0113] S231, further dividing the preheating adjustment area into two sub-areas along the length direction of the mixing hopper 200;

[0114] S232, the camera monitors the water vapor smoke coming out of the top of the mixing hopper, and obtains the water vapor smoke size of the sub-area of ​​each preheating adjustment area through the visual recognition algorithm. If the temperature of the temperature area to be adjusted is greater than the current overall average temperature K1, and the water vapor smoke size of the sub-area corresponding to the temperature area to be adjusted is greater than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-area corresponding to the temperature area to be adjusted is lowered; if the temperature of the temperature area to be adjusted is lower than the current overall average temperature K1, and the water vapor smoke size of the sub-area corresponding to the temperature area to be adjusted is less than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-area corresponding to the temperature area to be adjusted is raised.

[0115] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for controlling the preheating temperature of a sintering machine mixture, characterized in that: The steps include: S1, dividing the distributor into i temperature monitoring areas Li along the width direction of the distributor, and dividing the cross section of the mixing hopper where the preheating structure is located into i preheating adjustment areas Yi along the width direction of the mixing hopper, wherein the temperature monitoring areas Li correspond to the preheating adjustment areas Yi one-to-one, and i is a positive integer greater than 1; S21, obtaining the current temperature Ti of the mixture in each temperature monitoring area Li, and determining whether the difference between each current temperature Ti and the current overall average temperature K1 is greater than a first preset threshold e1, where the current overall average temperature K1 is the average value of all the current temperatures Ti; S22, if the difference between the current temperature Ti and the current overall average temperature K1 is greater than the first preset threshold e1, determining the temperature monitoring area Li corresponding to the current temperature Ti as a temperature area requiring adjustment; S23, adjusting the preheating structure of the preheating adjustment zone Yi corresponding to the temperature zone to be adjusted, and returning to step S21 until the difference between all the current temperatures Ti and the current overall average temperature K1 is no greater than the first preset threshold e1, and then proceeding to step S3; S3, determining whether the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold e2; If the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted until the difference between the current overall average temperature K1 and the target temperature K is less than or equal to the second preset threshold value e2.

2. The sintering machine mixture preheating temperature control method according to claim 1, characterized in that: If the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted, specifically including: S31, adjusting the preheating structure according to the difference between the current overall average temperature K1 and the target temperature K; S32, return to step S21.

3. The sintering machine mixture preheating temperature control method according to claim 2, characterized in that: Step S31 specifically includes: If the current overall average temperature K1 is greater than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted downward by z j ; If the current overall average temperature K1 is lower than the target temperature K and the difference is greater than the second preset threshold value e2, the preheating structure is adjusted upward. j ; z j =|K-K1|×a×b j , where z j is the adjustment amount of the preheating structure for the jth execution of step S31, a is the adjustment amount of the preheating structure corresponding to a unit temperature change, b j is the adjustment coefficient of the preheating structure of the jth execution of step S31, where b j >b j+1 , j is a positive integer.

4. The sintering machine mixture preheating temperature control method according to claim 3, characterized in that: The preheating structure includes a steam main pipe and a steam nozzle. A first regulating valve is installed on the air inlet pipe of the steam main pipe, and a second regulating valve is installed on the steam nozzle. The steam main pipe is arranged around the outer periphery of the mixing hopper, and the steam nozzles are arranged along the extension direction of the steam main pipe. The steam nozzles are provided in multiple groups and correspond to different preheating adjustment areas Yi respectively. The adjusting of the preheating structure of the preheating adjustment area Yi corresponding to the temperature area to be adjusted specifically includes: The second regulating valve of the preheating regulating area Yi corresponding to the temperature area requiring adjustment is adjusted.

5. The sintering machine mixture preheating temperature control method according to claim 4, characterized in that: If the difference between the current overall average temperature K1 and the target temperature K is greater than a second preset threshold value e2, the preheating structure is adjusted, specifically including: adjusting the first regulating valve.

6. The method according to claim 4, wherein: The time difference from when the preheating structure is adjusted to when the temperature adjustment effect appears and is monitored is the temperature adjustment time delay t; in L is the vertical height from the steam nozzle to the monitoring position of the infrared thermometer, v is the rotation speed of the unloading roller, and t0 is the comprehensive delay time.

7. A method for controlling the temperature of preheated water of a sintering machine mixture, characterized in that: The steps include: A1, divide the cross section of the steam structure of the mixing hopper into i humidity control areas Ni along the width direction of the mixing hopper, and divide the distributor into i humidity monitoring areas Mi along the width direction of the distributor. The humidity control areas Ni are set in a one-to-one correspondence with the humidity monitoring areas Mi. The humidity control area Ni is divided into two sub-processing areas along the length direction of the mixing hopper; A21, obtaining the current moisture content Si of the mixed material in each of the humidity monitoring areas Mi, and determining whether the difference between each current moisture content Si and the current overall average moisture content W1 is greater than a third preset threshold value e3; A22: If the difference between the current moisture content Si and the current overall average moisture content W1 is greater than the third preset threshold value e3, the humidity monitoring area Mi corresponding to the current moisture content Si is determined as an area requiring humidity adjustment; wherein the current overall average moisture content W1 is the average of the current moisture contents Si of all the humidity monitoring areas Mi; A23, monitoring the moisture content of the sub-processing area corresponding to the area requiring humidity adjustment, and adjusting the steam structure according to the moisture content monitoring data, then returning to step A21, until the difference between the current moisture content Si of all the humidity monitoring areas Mi and the current overall average moisture content W1 is less than or equal to the third preset threshold value e3; then proceeding to step A3; A3, determining whether the difference between the current overall average moisture content W1 and the target moisture content W is greater than a fourth preset threshold value e4; if the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, adjusting the steam structure until the difference between the current overall average moisture content W1 and the target moisture content W is less than or equal to the fourth preset threshold value e4; Execute the sintering machine mixture preheating temperature control method according to any one of claims 1 to 6.

8. The method for controlling the temperature of preheated water of a sintering machine mixture according to claim 7, characterized in that: If the difference between the current overall average moisture content W1 and the target moisture content W is greater than the fourth preset threshold value e4, the steam structure is adjusted, specifically including: A31, if the current overall average moisture content W1 is greater than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted downward by G j If the current overall average moisture content W1 is less than the target moisture content W and the difference is greater than the fourth preset threshold value e4, the steam structure is adjusted upward G j ; Among them G j =|W1-W|×A×B j ; G j is the steam structure adjustment amount of the jth execution of step A31, A is the steam structure adjustment amount corresponding to the unit water content change, B j is the adjustment coefficient of the steam structure when step A31 is executed for the jth time, where B j >B j+1 ; A32, return to step A21.

9. The method for controlling the temperature of preheated water of a sintering machine mixture according to claim 8, characterized in that: The preheating structure and the steam structure are the same structure, including a steam main pipe and a steam nozzle. A first regulating valve is installed on the air inlet pipe of the steam main pipe, and a second regulating valve is installed on the steam nozzle. The steam main pipe is arranged around the outer periphery of the mixing hopper, and the steam nozzles are arranged along the extension direction of the steam main pipe. All the sub-processing areas of the preheating adjustment area Yi and all the sub-processing areas of the humidity adjustment area Ni correspond to steam nozzles.

10. The method for controlling the temperature of preheated water of a sintering machine mixture according to claim 9, characterized in that: The moisture content of the sub-processing area corresponding to the area requiring humidity adjustment is monitored, and the steam structure is adjusted according to the moisture content monitoring data, specifically including: A231, a camera monitors the water vapor smoke emerging from the top of the mixing hopper, and obtains the water vapor smoke size of each sub-processing area Ni of the humidity adjustment area through a visual recognition algorithm; A232, if the current moisture content Si of the humidity area that needs to be adjusted is greater than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area that needs to be adjusted is greater than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is lowered; if the current moisture content of the humidity area that needs to be adjusted is less than the current overall average moisture content W1, and the water vapor smoke size of the sub-processing area corresponding to the humidity area that needs to be adjusted is less than the average water vapor smoke size, then the second regulating valve of the steam nozzle of the sub-processing area is raised.

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