Method for homogenizing the sintering speed of a mixture

Abstract

The application discloses a mixed material sintering speed equalization method and relates to the technical field of sintering. When the material surface wind speed difference between the transverse center area and the air extraction area of a sintering machine exceeds a preset wind speed difference threshold value, the mixed material in the center area of the mixed material distribution area is shunted to the periphery of the center area of the mixed material distribution area, which plays a role of loosening the material in the center area of the mixed material distribution area, improves the permeability of the mixed material in the center area of the mixed material distribution area, and further improves the permeability of the mixed material in the transverse center area of the sintering machine, the material surface wind speed in the transverse center area of the sintering machine, and the sintering speed of the mixed material in the transverse center area of the sintering machine, so that the sintering speed is more uniform.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and more particularly to a method for homogenizing the sintering speed of a mixture. Background Technology

[0002] The sintering speed of the mixture is often affected by the permeability of the mixture layer; better permeability results in a faster sintering speed. The surface air velocity can characterize the difference in sintering speed; areas with higher surface air velocities experience faster sintering. The transverse central area of ​​the sintering machine is located at the intersection of the exhaust fan's airflow; the sintering speed of the mixture here is generally lower than that around the perimeter, causing differences in sintering speed and affecting sintering uniformity. Summary of the Invention

[0003] This invention solves the technical problem of uneven sintering speed of mixtures by providing a method for homogenizing the sintering speed of mixtures.

[0004] The embodiments of the present invention provide the following technical solutions:

[0005] A method for homogenizing the sintering rate of a mixture includes:

[0006] During the sintering process of the mixed material, the surface wind speed of the material is detected in the transverse central area and the exhaust area of ​​the sintering machine; the transverse direction is perpendicular to the direction of travel of the sintering machine, the transverse central area is the exhaust confluence area of ​​the fan, and the exhaust area is the area covered by the fan exhaust.

[0007] If the difference in material surface wind speed between the transverse central area and the exhaust area exceeds a preset wind speed difference threshold, the mixture in the central area of ​​the mixture distribution area will be diverted to the surrounding area of ​​the central area of ​​the mixture distribution area.

[0008] Preferably, the detection of the material surface wind speed in the transverse central region and the exhaust region of the sintering machine includes:

[0009] The surface wind speed of the material in the horizontal center region and the exhaust region that is on the same horizontal straight line as the horizontal center region is detected.

[0010] Preferably, the detection of the material surface wind speed in the transverse central region and the exhaust region of the sintering machine includes:

[0011] The surface wind speed of the material in the transverse central region and the two exhaust zones is detected.

[0012] Preferably, if the wind speed difference between the material surface in the transverse central region and the exhaust region exceeds a preset wind speed difference threshold, it includes:

[0013] If the difference in surface wind speed between the horizontal central region and the two exhaust regions both exceed the wind speed difference threshold.

[0014] Preferably, the wind speed difference threshold is 10% of the surface wind speed of the material in the exhaust area.

[0015] Preferably, the step of diverting the mixture from the central area of ​​the mixture distribution zone to the surrounding area of ​​the central area of ​​the mixture distribution zone includes:

[0016] A diversion pipe is installed between the central area of ​​the mixing material distribution zone and the discharge port of the mixing material silo. The extension direction of the diversion pipe is consistent with the discharge direction of the mixing material, and the lower end of the diversion pipe is inserted into the inclined surface formed by the mixing material in the distribution zone.

[0017] Preferably, the distance between the insertion point of the diverter pipe into the inclined surface and the base material layer is between 100-300mm.

[0018] Preferably, if the wind speed difference between the material surface in the transverse central region and the exhaust region exceeds a preset wind speed difference threshold, then after diverting the mixture in the central region of the mixture distribution area to the surrounding area of ​​the central region of the mixture distribution area, the method further includes:

[0019] Adjust the depth of the diversion pipe inserted into the inclined plane until the difference in material surface wind speed between the transverse central region and the exhaust region is lower than the wind speed difference threshold.

[0020] Preferably, the diverter is a circular pipe.

[0021] Preferably, the diameter of the diverter is between 100-150 mm.

[0022] The technical solution provided by this invention has at least the following technical effects or advantages:

[0023] When the difference in material surface wind speed between the transverse central area and the exhaust area of ​​the sintering machine exceeds a preset wind speed difference threshold, the present invention diverts the mixture in the central area of ​​the mixing material distribution area to the surrounding area of ​​the central area of ​​the mixing material distribution area. This loosens the mixture in the central area of ​​the mixing material distribution area, improves the air permeability of the mixture in the central area of ​​the mixing material distribution area, thereby improving the air permeability of the mixture in the transverse central area of ​​the sintering machine, increasing the material surface wind speed in the transverse central area of ​​the sintering machine, and thus increasing the sintering speed of the mixture in the transverse central area of ​​the sintering machine, promoting a more uniform sintering speed. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a flowchart of the method for homogenizing the sintering speed of the mixture in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the mixture layer in an embodiment of the present invention;

[0027] Figure 3 This is another schematic diagram of the mixture layer in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram illustrating the function of the diversion tube in an embodiment of the present invention. Detailed Implementation

[0029] This invention provides a method for homogenizing the sintering speed of a mixture, thus solving the technical problem of uneven sintering speed of the mixture.

[0030] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] like Figure 1 As shown, the method for homogenizing the sintering rate of the mixture in this embodiment includes:

[0033] Step S1: During the sintering process of the mixture, the surface wind speed of the material in the transverse central area and the exhaust area of ​​the sintering machine is detected; the transverse direction is the direction perpendicular to the direction of travel of the sintering machine, the transverse central area is the exhaust confluence area of ​​the fan, and the exhaust area is the area covered by the fan exhaust.

[0034] Step S2: If the difference in material surface wind speed between the horizontal central area and the exhaust area exceeds the preset wind speed difference threshold, the mixed material in the central area of ​​the mixed material distribution area will be diverted to the surrounding area of ​​the central area of ​​the mixed material distribution area.

[0035] like Figure 2 and Figure 3 As shown, during the sintering process of the mixture, the mixture hopper continuously feeds material into the material distribution area, and the mixture moves continuously to the right, finally falling at the far right end. This creates a mixture as shown in the diagram. Figure 2The shape of the mixture is shown. The sintering machine trolley is divided into two exhaust zones in the transverse direction, with each exhaust zone being handled by a fan. This creates an exhaust convergence zone between the two fans in the transverse center of the sintering machine. Due to the competing airflow between the two fans, a lower negative pressure is often formed in the exhaust convergence zone in the transverse center of the sintering machine, resulting in a significantly lower sintering speed for the mixture in the transverse center of the sintering machine compared to the surrounding areas.

[0036] In step S1, since there are two exhaust zones, the material surface velocity can be detected in only one exhaust zone or in both exhaust zones simultaneously. Therefore, in step S1, detecting the material surface velocity in the transverse central region of the sintering machine and the exhaust zones can include: detecting the material surface velocity in the transverse central region of the sintering machine and the two exhaust zones; or it can include: detecting the material surface velocity in the transverse central region of the sintering machine and the two exhaust zones. This embodiment preferably detects the material surface velocity in the transverse central region of the sintering machine and the two exhaust zones.

[0037] Step S1 can select to detect the surface velocity of the material at any point in the transverse central area of ​​the sintering machine and at any point in each exhaust area. Since the exhaust area is relatively large, the main factor affecting the surface velocity of the material in the transverse central area of ​​the sintering machine is the exhaust from the exhaust areas along the same transverse straight line as the transverse central area. Therefore, only when the surface velocity of a point in the transverse central area of ​​the sintering machine and the exhaust areas along the same transverse straight line are comparable can the material surface velocity be accurately determined as to the extent to which the surface velocity of the material in the transverse central area of ​​the sintering machine is affected by the exhaust from both sides. Therefore, in step S1, detecting the surface velocity of the material in the transverse central area of ​​the sintering machine and the exhaust areas can include: detecting the surface velocity of the material in the transverse central area of ​​the sintering machine and the exhaust areas along the same transverse straight line as the transverse central area. In principle, the surface velocity of the material in one exhaust area along the same transverse straight line as the transverse central area can be detected, or the surface velocity of two exhaust areas along the same transverse straight line as the transverse central area can be detected. In this embodiment, the surface velocity of the material in the material in the two exhaust areas along the same transverse straight line as the transverse central area is detected.

[0038] Step S1 can be performed using an anemometers to detect the surface wind speed. Taking the detection of the surface wind speed in the transverse central area of ​​the sintering machine and the two exhaust zones located on the same transverse straight line as the transverse central area as an example, an odd number of anemometers can be arranged at equal intervals on the same straight line of the surface, with two anemometers placed at opposite ends of the transverse surface. The surface wind speed detected by the anemometer in the middle is the surface wind speed in the transverse central area of ​​the sintering machine. The average surface wind speed detected by all anemometers on the same side as the middle anemometer can be used as the surface wind speed of the exhaust zone on that side. The average surface wind speed detected by all anemometers on the other side of the middle anemometer can be used as the surface wind speed of the exhaust zone on the other side. The measured surface wind speed can be made more reliable by averaging multiple measurements.

[0039] In this embodiment, it can be assumed that the surface wind speed of the material in the transverse central region of the sintering machine is always lower than that in the exhaust region. In step S2, if only the surface wind speed of the material in one exhaust region is detected, the mixture in the central region of the mixing material distribution area is diverted when the difference in surface wind speed between the transverse central region of the sintering machine and the exhaust region exceeds the wind speed difference threshold. In this embodiment, the surface wind speed of the material in two exhaust regions is detected. The mixture in the central region of the mixing material distribution area can be diverted when the difference in surface wind speed between the transverse central region of the sintering machine and at least one exhaust region exceeds the wind speed difference threshold, or the mixture in the central region of the mixing material distribution area can be diverted when the difference in surface wind speed between the transverse central region of the sintering machine and the two exhaust regions exceeds the wind speed difference threshold. The latter is preferred in this embodiment.

[0040] Among them, the wind speed difference threshold can be 10% of the wind speed on the material surface in the exhaust area.

[0041] In step S2, diverting the mixture from the central area of ​​the mixing distribution zone to the surrounding area specifically includes: installing a diversion pipe between the central area of ​​the mixing distribution zone and the discharge port of the mixing silo, the extension direction of the diversion pipe being consistent with the discharge direction of the mixture, and the lower end of the diversion pipe being inserted into the inclined surface formed by the mixture in the distribution zone, such as... Figure 4 As shown. Without a diversion pipe, the mixture above the central area of ​​the mixing zone will all fall into the central area, resulting in no significant difference in air permeability between the central transverse area of ​​the sintering machine and the surrounding mixture. This leads to a slower sintering speed and uneven sintering when the surface velocity in the central transverse area is lower than that in the exhaust area. However, with the diversion pipe installed, the mixing zone's distribution is inhibited, diverting and compressing the mixture to the surrounding areas. This loosens the mixture in the central area, improving its air permeability, which in turn improves the air permeability in the central transverse area, increasing the surface velocity and ultimately increasing the sintering speed, resulting in a more uniform sintering rate.

[0042] In this case, on the inclined surface formed by the distribution pipe, if the height of the mixture at the insertion point is too low, the loosening effect is not obvious, and the adjustable range of the insertion depth of the distribution pipe is too narrow, failing to effectively loosen the mixture. Conversely, if the height of the mixture at the insertion point is too high, the closer the insertion point is to the surface of the mixture, the more likely it is to cause significant collapse of the mixture surface, affecting the flatness of the fabric and making it prone to contact with the nine-roller distributor and other fabric-laying equipment, creating a production safety hazard. Considering that the distance between the surface of the mixture and the base layer is generally greater than 300mm, this embodiment preferably places the distance between the insertion point of the distribution pipe on the inclined surface of the mixture and the base layer between 100-300mm, ensuring effective loosening without causing the mixture surface to collapse.

[0043] The cross-sectional shape of the manifold is not fixed, such as square or elliptical, but is preferably circular, meaning the manifold is a round tube. When selecting the diameter of the manifold, if the diameter is too small, the loosening area will be too small, failing to significantly improve air permeability; if the diameter is too large, the loosening area will be too large, causing significant collapse of the mixed material surface and affecting the flatness of the material distribution. In this embodiment, the diameter of the manifold is preferably between 100-150mm, which can significantly improve the air permeability of the mixed material in the transverse central area of ​​the sintering machine without causing significant collapse of the mixed material surface.

[0044] After the material is diverted through the transverse central region of the sintering machine in step S2, the depth to which the diverter pipe is inserted into the inclined surface of the material distribution area may be insufficient, and the difference in surface air velocity between the transverse central region and the exhaust area of ​​the sintering machine may still be higher than the air velocity difference threshold. Therefore, this embodiment preferably includes, after step S2, adjusting the depth of the diverter pipe inserted into the inclined surface of the material distribution area until the difference in surface air velocity between the transverse central region and the exhaust area of ​​the sintering machine is lower than the air velocity difference threshold. It is easy to see that the greater the depth of the diverter pipe inserted into the inclined surface of the material distribution area, the better the loosening effect and the better the air permeability of the material in the transverse central region of the sintering machine. This ensures that the sintering speed of the material in the transverse central region and the exhaust area of ​​the sintering machine is basically consistent, resulting in uniform sintering of the material.

[0045] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0046] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for homogenizing the sintering speed of a mixture, characterized in that, include: During the sintering process of the mixed material, the surface wind speed of the material is detected in the transverse central area and the exhaust area of ​​the sintering machine; the transverse direction is perpendicular to the direction of travel of the sintering machine, the transverse central area is the exhaust confluence area of ​​the fan, and the exhaust area is the area covered by the fan exhaust. If the difference in material surface wind speed between the transverse central area and the exhaust area exceeds a preset wind speed difference threshold, the mixture in the central area of ​​the mixture distribution area will be diverted to the surrounding area of ​​the central area of ​​the mixture distribution area. The step of diverting the mixture from the central area of ​​the mixture distribution zone to the surrounding area includes: A diversion pipe is installed between the central area of ​​the mixing material distribution zone and the discharge port of the mixing material silo. The extension direction of the diversion pipe is consistent with the discharge direction of the mixing material, and the lower end of the diversion pipe is inserted into the inclined surface formed by the mixing material in the distribution zone.

2. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, The material surface wind speed in the transverse central area and exhaust area of ​​the sintering machine includes: The surface wind speed of the material in the horizontal center region and the exhaust region that is on the same horizontal straight line as the horizontal center region is detected.

3. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, The material surface wind speed in the transverse central area and exhaust area of ​​the sintering machine includes: The surface wind speed of the material in the transverse central region and the two exhaust zones is detected.

4. The method for homogenizing the sintering rate of the mixture as described in claim 3, characterized in that, If the difference in surface wind speed between the transverse central region and the exhaust region exceeds a preset wind speed difference threshold, it includes: If the difference in surface wind speed between the horizontal central region and the two exhaust regions both exceed the wind speed difference threshold.

5. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, The wind speed difference threshold is 10% of the surface wind speed in the exhaust area.

6. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, The distance between the insertion point of the diverter pipe into the inclined surface and the base material layer is between 100-300mm.

7. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, If the wind speed difference between the material surface in the transverse central region and the exhaust region exceeds a preset wind speed difference threshold, then after diverting the mixture in the central region of the mixture distribution area to the surrounding area of ​​the central region of the mixture distribution area, the method further includes: Adjust the depth of the diversion pipe inserted into the inclined plane until the difference in material surface wind speed between the transverse central region and the exhaust region is lower than the wind speed difference threshold.

8. The method for homogenizing the sintering rate of the mixture as described in claim 1, characterized in that, The shunt pipe is a circular pipe.

9. The method for homogenizing the sintering rate of a mixture as described in claim 8, characterized in that, The diameter of the shunt tube is between 100-150 mm.

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