Sintering dehumidification method

Abstract

This invention provides a sintering dehumidification method, relating to the field of sintering technology, comprising the following steps: conveying the material to be sintered onto a sintering trolley; performing sintering operations on the material using the sintering trolley, causing the material to gradually form a sintered ore layer, a combustion layer, a preheating layer, a drying layer, and a super-wetted layer from top to bottom; performing a ventilation operation on the material during sintering, and adjusting the ventilation height stepwise based on the height change of the super-wetted layer, so that the ventilation range covers at least part of the super-wetted layer in the height direction; and obtaining the sintered ore product after the combustion layer, preheating layer, drying layer, and super-wetted layer disappear. This invention can efficiently remove water vapor from the material through ventilation, thereby reducing the amount of water vapor condensation, reducing the thickness of the super-wetted layer, and thus improving the sintering effect. Furthermore, by stepwise controlling the ventilation height, the problem of wasted ventilation volume is significantly reduced while meeting the dehumidification needs of the super-wetted layer.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a sintering dehumidification method. Background Technology

[0002] Sintering is a crucial step in the steel industry's production process and a fundamental condition for ensuring the normal operation of blast furnace ironmaking. One of the most critical aspects of sintering is the series of physicochemical reactions that occur on the sintering machine trolley. During the sintering process of the mixed material under duct conditions, five distinct zones emerge along the entire material layer. The uppermost layer is the sintered ore zone, followed by the combustion zone, preheating zone, drying zone, and over-wet zone (or the original mixed material zone). As sintering time increases, these zones gradually disappear, leaving only the sintered ore zone. The exhaust gas from the drying zone contains a large amount of water vapor. When this water vapor-containing exhaust gas encounters the cold material at the bottom layer, its temperature drops suddenly. When the temperature of this water vapor-containing exhaust gas falls below the dew point temperature (52℃~65℃), the water vapor changes from a gaseous state to a liquid state, causing the moisture content of the lower mixed material to continuously increase, forming an over-wet zone. The formation of the over-wet zone worsens the permeability of the material layer, thus affecting the sintering effect. Therefore, how to reduce the occurrence of excessive moisture during sintering to improve sintering quality has become an urgent technical problem to be solved. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a sintering dehumidification method.

[0004] The above-mentioned objective of this invention can be achieved by the following technical solution: This invention provides a sintering dehumidification method, comprising the following steps:

[0005] The material to be sintered is transported to the sintering trolley;

[0006] The material is sintered using a sintering trolley, so that the material gradually forms a sintered ore layer, a combustion layer, a preheating layer, a drying layer and a wetted layer from top to bottom;

[0007] The material being sintered is subjected to a ventilation operation, and the ventilation height is adjusted step by step based on the height change of the wet layer, so that the ventilation range covers at least part of the wet layer in the height direction.

[0008] After the combustion layer, the preheating layer, the drying layer, and the over-wet layer disappear, the sintered ore product is obtained.

[0009] In a preferred embodiment of the present invention, the venting operation on the material undergoing sintering specifically includes the following steps:

[0010] The material being sintered is vented from both sides of the sintering trolley.

[0011] In a preferred embodiment of the present invention, the step of venting the material being sintered from both sides of the sintering trolley specifically includes the following steps:

[0012] The material being sintered is simultaneously vented from both sides of the sintering trolley.

[0013] In a preferred embodiment of the present invention, the step of venting the material being sintered from both sides of the sintering trolley specifically includes the following steps:

[0014] First, the material being sintered is vented from one side of the sintering trolley. After a preset time interval, the material being sintered is vented from the other side of the sintering trolley, thus alternating the venting operation between the two sides of the sintering trolley.

[0015] In a preferred embodiment of the present invention, a ventilated structure is provided on the partitions on both sides of the sintering trolley, and an exhaust structure is provided on both sides of the sintering trolley respectively, and the two exhaust structures are used to exhaust the material in the sintering process.

[0016] The exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each of the exhaust branch pipes, and a control valve installed on each of the exhaust branch pipes. Each exhaust branch pipe has an exhaust port facing the ventilation structure. Each exhaust port is arranged sequentially along the extension direction of the sintering trolley and connected to the ventilation structure.

[0017] In a preferred embodiment of the present invention, the venting operation on the material undergoing sintering specifically includes the following steps:

[0018] The material being sintered is evacuated from one side of the sintering trolley.

[0019] In a preferred embodiment of the present invention, the sintering dehumidification method further includes the following steps:

[0020] The material being sintered is blown by air from the other side of the sintering trolley, and the blowing height is adjusted step by step based on the height change of the wet layer so that the blowing range covers the wet layer in the height direction.

[0021] In a preferred embodiment of the present invention, a breathable structure is provided on the side partitions of the sintering trolley;

[0022] An exhaust structure is provided on one side of the sintering trolley to exhaust the material being sintered. The exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each exhaust branch pipe, and a control valve provided on each exhaust branch pipe. Each exhaust branch pipe has an exhaust port facing the ventilation structure of the sintering trolley. Each exhaust port is arranged sequentially along the extension direction of the sintering trolley and connected to one of the ventilation structures.

[0023] A blowing structure is provided on the other side of the sintering table to blow air onto the material being sintered. The blowing structure includes multiple blowing branch pipes, a main blowing pipe connecting each blowing branch pipe, and a control valve provided on each blowing branch pipe. Each blowing branch pipe has a blowing port facing the ventilation structure. Each blowing port is arranged sequentially along the extension direction of the sintering trolley and connected to another ventilation structure.

[0024] In a preferred embodiment of the present invention, the air supply temperature of the blowing operation is not lower than 65°C.

[0025] In a preferred embodiment of the present invention, the step of adjusting the exhaust height in stages based on the height change of the humidification layer specifically includes the following steps:

[0026] Along the conveying direction of the sintering trolley, the sintering trolley is divided into multiple exhaust sections, wherein the exhaust height of the upstream exhaust section is greater than the exhaust height of the downstream exhaust section.

[0027] The technical solution of the present invention has the following significant beneficial effects:

[0028] When using the sintering dehumidification method described in this invention, the material to be sintered is transported to a sintering trolley, and the sintering trolley is used to perform sintering operations on the material, thereby gradually forming a sintered ore layer, a combustion layer, a preheating layer, a drying layer, and an over-wetted layer. As the sintering time is extended, the combustion layer, preheating layer, drying layer, and over-wetted layer will gradually disappear until only the sintered ore layer remains, at which point the sintered ore product is obtained.

[0029] During the sintering process, the exhaust gas generated by the drying layer contains a large amount of water vapor. When this exhaust gas containing water vapor sinks to the cold material at the bottom layer of the material, it is affected by the temperature of the cold material, causing the water vapor in the exhaust gas to condense into water droplets. This causes the moisture in the bottom layer of the material to increase continuously, forming an over-wet layer. The presence of the over-wet layer reduces the permeability of the material, thereby affecting the sintering effect of the material.

[0030] To reduce the thickness of the damp layer and improve the material's permeability, the sintering dehumidification method of this invention also includes a ventilation operation on the material during sintering. This ventilation operation efficiently removes waste gas and water vapor from the material, thereby reducing water vapor condensation and consequently lowering the thickness of the damp layer, thus improving the sintering effect. Furthermore, the ventilation height is adjusted in stages based on changes in the height of the damp layer, ensuring that the ventilation range covers at least a portion of the damp layer in the vertical direction. By controlling the ventilation height in stages, the problem of wasted ventilation volume is significantly reduced while still meeting the dehumidification requirements of the damp layer, which also helps to lower equipment operating costs. Attached Figure Description

[0031] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0033] Figure 1 This is a schematic flowchart of the sintering dehumidification method described in this invention;

[0034] Figure 2 This is a three-dimensional structural diagram of an embodiment of the exhaust assembly described in this invention;

[0035] Figure 3 This is a side view of one embodiment of the exhaust section described in this invention.

[0036] Figure 4 This is a side view of one embodiment of the exhaust assembly described in this invention.

[0037] Figure 5 This is a side view of one embodiment of the exhaust vent described in this invention.

[0038] The reference numerals in the above figures are as follows:

[0039] 100. Sintering trolley; 110. Partition plate;

[0040] 210. Exhaust structure; 211. Exhaust branch pipe; 212. Exhaust main pipe; 213. Exhaust outlet; 214. Control valve;

[0041] 300. First ventilation section;

[0042] 400. Second ventilation section;

[0043] 500. Third ventilation section;

[0044] 600, Fourth ventilation section. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please refer to the following: Figures 1 to 5 As shown, an embodiment of the present invention provides a sintering dehumidification method, which specifically includes the following steps:

[0047] Step S1000: The material to be sintered is transported to the sintering trolley 100.

[0048] Step S2000: Use the sintering trolley 100 to sinter the material, so that the material gradually forms a sintered ore layer, a combustion layer, a preheating layer, a drying layer and a wetted layer from top to bottom.

[0049] Step S3000: Perform a ventilation operation on the material being sintered, and gradually adjust the ventilation height based on the height change of the wet layer, so that the ventilation range covers at least part of the wet layer in the height direction. Preferably, the ventilation range covers the wet layer in the height direction.

[0050] Step S4000: After the combustion layer, preheating layer, drying layer and over-wet layer disappear, the sintered ore product is obtained.

[0051] In general, when using this sintering dehumidification method, the material to be sintered is transported to the sintering trolley 100, and the sintering trolley 100 is used to sinter the material, so that the material gradually forms a sintered ore layer, a combustion layer, a preheating layer, a drying layer and an over-wetted layer. As the sintering time is extended, the combustion layer, the preheating layer, the drying layer and the over-wetted layer will gradually disappear until only the sintered ore layer remains, at which point the sintered ore product is obtained.

[0052] During the sintering process, the exhaust gas generated by the drying layer contains a large amount of water vapor. When this exhaust gas containing water vapor sinks to the cold material at the bottom layer of the material, it is affected by the temperature of the cold material, causing the water vapor in the exhaust gas to condense into water droplets. This causes the moisture in the bottom layer of the material to increase continuously, forming an over-wet layer. The presence of the over-wet layer reduces the permeability of the material, thereby affecting the sintering effect of the material.

[0053] To reduce the thickness of the excessively wetted layer and improve the material's permeability, the sintering dehumidification method of this invention also includes a ventilation operation on the material during sintering. This ventilation operation efficiently removes waste gas and water vapor from the material, thereby reducing water vapor condensation and consequently lowering the thickness of the excessively wetted layer, thus improving the sintering effect. Furthermore, the ventilation height is adjusted in stages based on changes in the height of the excessively wetted layer, ensuring that the ventilation range covers at least a portion of the layer in the vertical direction. By controlling the ventilation height in stages, the problem of wasted ventilation volume is significantly reduced while still meeting the dehumidification requirements of the excessively wetted layer, which also helps to lower equipment operating costs.

[0054] In an embodiment of the present invention, the ventilation operation for the material undergoing sintering specifically includes the following steps:

[0055] Step S3100: The material being sintered is evacuated from both sides of the sintering trolley 100.

[0056] By using the two sides of the sintering trolley 100 to ventilate the material being sintered, the ventilation efficiency is improved, thereby removing moisture from the wet layer more efficiently and improving the air permeability of the wet layer.

[0057] Furthermore, the materials during sintering are monitored in real time. Based on the real-time detected thickness of the wetted layer and the quality of the sintered product, the exhaust volume on both sides is dynamically adjusted to ensure optimal sintered product quality. The real-time monitoring begins from the rear end of the ignition furnace.

[0058] In one feasible embodiment of the present invention, the ventilation operation of the material being sintered by both sides of the sintering trolley 100 specifically includes the following steps:

[0059] Step S3110: The material being sintered is simultaneously vented from both sides of the sintering trolley 100.

[0060] By simultaneously exhausting the material being sintered from both sides of the sintering trolley 100, the moisture in the over-wet layer can be extracted from both sides, thereby improving the uniformity of exhaust and achieving better exhaust and dehumidification efficiency.

[0061] In another feasible embodiment of the present invention, the ventilation operation of the material being sintered by the two sides of the sintering trolley 100 specifically includes the following steps:

[0062] First, the material being sintered is vented from one side of the sintering trolley 100. After a preset time interval, the material being sintered is vented from the other side of the sintering trolley 100. Thus, the material being sintered is vented alternately from both sides of the sintering trolley 100.

[0063] By alternately venting the material being sintered from both sides of the sintering trolley 100, the ventilation structures 210 on both sides of the sintering trolley 100 can operate alternately. In this way, by using a set of ventilation power devices to alternately provide ventilation power to the two sets of ventilation structures 210, the two sets of ventilation structures 210 can be driven to operate simultaneously, which reduces equipment costs.

[0064] Furthermore, by controlling the switching of the two sets of exhaust structures 210 after a preset time interval, the movement distance of the sintering trolley 100 is limited during the preset time interval, thereby reducing the impact of unilateral suction and the switching process on the exhaust and dehumidification effect.

[0065] Designers can adjust the specific time value of the preset interval according to the usage needs. For example, the preset interval can be 10s, 30s, 1min or other durations, without specific numerical restrictions.

[0066] Of course, in other feasible embodiments, designers may adjust the variation pattern of the ventilation operation according to the needs of use, and no specific restrictions are imposed here.

[0067] In an embodiment of the present invention, adjusting the exhaust height step by step based on the change in the height of the humidification layer specifically includes the following steps:

[0068] Step S3200: Along the conveying direction of the sintering trolley 100, the sintering trolley 100 is divided into multiple exhaust sections, wherein the exhaust height of the exhaust section located upstream is greater than the exhaust height of the exhaust section located downstream.

[0069] In one feasible embodiment, such as Figure 2 and Figure 3 In the embodiment shown, the sintering trolley 100 is divided into a first exhaust section 300, a second exhaust section 400, a third exhaust section 500, and a fourth exhaust section 600; wherein the exhaust height of the first exhaust section 300 is greater than the exhaust height of the second exhaust section 400, the exhaust height of the second exhaust section 400 is greater than the exhaust height of the third exhaust section 500, and the exhaust height of the third exhaust section 500 is greater than the exhaust height of the fourth exhaust section 600.

[0070] Preferably, the sintering trolley 100 is divided into a first exhaust section 300, a second exhaust section 400, a third exhaust section 500 and a fourth exhaust section 600 at equal intervals.

[0071] Of course, in other feasible embodiments, designers can adjust the number and length of the exhaust sections according to production needs, and no specific restrictions are imposed here.

[0072] In embodiments of the present invention, such as Figure 5 In the illustrated embodiment, the exhaust height of the first exhaust section 300 is the same as or approximately the same as the thickness of the material laid on the sintering trolley 100, the exhaust height of the second exhaust section 400 is about three-quarters of the thickness of the material laid on the sintering trolley 100, the exhaust height of the third exhaust section 500 is about half of the thickness of the material laid on the sintering trolley 100, and the exhaust height of the fourth exhaust section 600 is about one-quarter of the thickness of the material laid on the sintering trolley 100.

[0073] By setting the exhaust heights of the first exhaust section 300, the second exhaust section 400, the third exhaust section 500, and the fourth exhaust section 600 in stages, the installation area of ​​the exhaust port 213 is reduced while meeting the dehumidification needs of the wet layer, thereby reducing equipment investment costs.

[0074] Of course, in other feasible embodiments, designers can adjust the number of exhaust sections and the exhaust height of the exhaust sections according to the needs of use, and no specific restrictions are imposed here.

[0075] In embodiments of the present invention, such as Figure 2 , Figure 3 and Figure 4 In the embodiment shown, a ventilation structure is provided on the partitions 110 on both sides of the sintering trolley 100, and an exhaust structure 210 is provided on both sides of the sintering trolley 100 respectively. The two exhaust structures 210 are used to exhaust the material in the sintering process.

[0076] Specifically, the exhaust structure 210 includes multiple exhaust branch pipes 211, an exhaust main pipe 212 connecting each exhaust branch pipe 211, and a control valve 214 installed on each exhaust branch pipe 211. Each exhaust branch pipe 211 has an exhaust port 213 facing the ventilation structure. Each exhaust port 213 is sequentially arranged along the extension direction of the sintering trolley 100 and connected to the ventilation structure.

[0077] Furthermore, along the transport direction of the sintering trolley 100, such as Figure 5 In the illustrated embodiment, the diameter of the exhaust branch pipes 211 in each exhaust section gradually decreases. Designers can adjust the diameter of each duct according to usage needs, and no specific numerical limit is specified here.

[0078] As can be seen from the foregoing, as the humidity of the material on the sintering trolley 100 decreases, the area of ​​the exhaust port 213 also gradually decreases. Correspondingly, by setting the diameter of each exhaust branch pipe 211 to gradually decrease, each exhaust branch pipe 211 is matched with the exhaust port 213. This helps to maintain the suction power of each exhaust port 213, avoids causing large disturbance to the material, and improves the stability of the exhaust process.

[0079] Designers can adjust the shape and diameter of each exhaust branch pipe 211 according to usage needs, without specifying any numerical limitations. For example, the pipe connecting the exhaust branch pipe 211 to the exhaust main pipe 212 in each duct section can be changed from a square pipe to a round pipe with diameters of ø500, ø400, ø300, or ø200.

[0080] Furthermore, the connection between the exhaust branch pipe 211 and the exhaust main pipe 212 can be achieved by open-hole welding, and the weld quality should be ensured and ultrasonic testing should be performed to ensure no air leakage.

[0081] In an embodiment of the present invention, the exhaust vents 213 are flared, and each exhaust vent 213 is connected in sequence. By flaring the exhaust vents 213, the exhaust vents 213 can better cover or substantially cover the ventilated structure of the partition 110, thereby improving the exhaust effect.

[0082] Furthermore, by connecting multiple exhaust vents 213 sequentially, it is beneficial to eliminate the gaps between adjacent exhaust vents 213 and to facilitate the sealing of these gaps. Designers can adjust the sealing structure between adjacent exhaust vents 213 according to usage requirements, without making specific limitations here.

[0083] In an embodiment of the present invention, a control valve 214 is provided on the exhaust branch pipe 211. Designers can adjust the specific model of the control valve 214 according to usage requirements; no specific limitations are imposed here. Preferably, the control valve 214 is a butterfly valve.

[0084] In one feasible embodiment, a butterfly valve is installed on the circular section of the exhaust branch pipe 211. The butterfly valve can be installed on the plane of the sintering trolley 100, thus facilitating manual operation. Of course, the butterfly valve can also be controlled by a PLC controller or controlled locally on-site.

[0085] Specifically, when the sintering trolley 100 is equally divided into a first exhaust section 300, a second exhaust section 400, a third exhaust section 500, and a fourth exhaust section 600, the butterfly valve opening in the first exhaust section 300 can be set to 50%, the butterfly valve opening in the second exhaust section 400 can be set to 40%, the butterfly valve opening in the third exhaust section 500 can be set to 30%, and the butterfly valve opening in the fourth exhaust section 600 can be set to 20%. Furthermore, the butterfly valve opening can be adjusted in real time according to the quality of the sintered ore, and the adjustment range of the butterfly valve can be set to ±10%.

[0086] Of course, in other feasible embodiments, designers can adjust the opening degree of each butterfly valve according to the generation needs, and no specific restrictions are made here.

[0087] In an embodiment of the present invention, the ventilation operation for the material undergoing sintering specifically includes the following steps:

[0088] Step S3300: The material being sintered is evacuated from one side of the sintering trolley 100.

[0089] By venting the material being sintered from one side of the sintering trolley 100, the humidity on that side of the material can be reduced, thereby improving the air permeability of the wet layer.

[0090] Furthermore, while the other side of the sintering trolley 100 is not equipped with an exhaust system, a permeable structure can still be installed. This allows external air to enter the wetted layer through the permeable structure and flow towards the exhaust structure 210. During this process, the use of external air increases the airflow of the wetted layer, improves its permeability, and also carries away some moisture, thereby reducing the moisture content of the wetted layer.

[0091] In embodiments of the present invention, the sintering dehumidification method further includes the following steps:

[0092] Step S3400: The material being sintered is blown by the other side of the sintering trolley 100, and the blowing height is adjusted step by step based on the height change of the wet layer so that the blowing range covers the wet layer in the height direction.

[0093] By blowing air onto the material being sintered from the other side of the sintering trolley 100, gas can be blown to the other side of the wet layer, thereby improving the permeability of the wet layer.

[0094] Furthermore, by performing exhaust and blowing operations on both sides of the humidification layer respectively, a strong gas convection is formed in the humidification layer, which accelerates the efficiency of air passing through the humidification layer, thereby carrying out more moisture and significantly improving the moisture extraction efficiency in the humidification layer, thus improving the exhaust and dehumidification effect.

[0095] Specifically, ventilation structures are provided on the partitions 110 on both sides of the sintering trolley 100; an exhaust structure 210 is provided on one side of the sintering trolley 100, and the exhaust structure 210 is used to exhaust the material in the sintering process; wherein, the exhaust structure 210 includes multiple exhaust branch pipes 211, an exhaust main pipe 212 connecting each exhaust branch pipe 211, and a control valve 214 provided on each exhaust branch pipe 211. The exhaust branch pipe 211 has an exhaust port 213 facing the ventilation structure of the sintering trolley 100, and each exhaust port 213 is arranged sequentially along the extension direction of the sintering trolley 100 and connected to one of the ventilation structures.

[0096] A blowing structure is set on the other side of the sintering table to blow air onto the material being sintered. The blowing structure includes multiple blowing branch pipes, a main blowing pipe connecting each blowing branch pipe, and a control valve 214 set on each blowing branch pipe. The blowing branch pipes have blowing ports facing the ventilation structure. Each blowing port is arranged sequentially along the extension direction of the sintering trolley 100 and connected to another ventilation structure.

[0097] Designers can adjust the specific model of control valve 214 according to usage requirements; no specific restrictions are imposed here. Preferably, control valve 214 is a butterfly valve. The specific construction of the exhaust structure 210 can be referred to the foregoing and will not be repeated here. Furthermore, the specific construction of the blowing structure can also be referred to the exhaust structure 210; the difference lies in the direction of gas flow.

[0098] As mentioned above, when the temperature of the exhaust gas containing water vapor drops below the dew point temperature (52℃~65℃), the water vapor changes from a gaseous state to a liquid state, causing the moisture content of the lower mixture to continuously increase and form an over-wet layer. The formation of the over-wet layer will worsen the permeability of the material layer.

[0099] To address the aforementioned issues, in embodiments of the present invention, the supply air temperature during the blowing operation is not lower than 65°C. By ensuring the supply air temperature during the blowing operation is not lower than 65°C, hot air is used to purge the moisture-absorbing layer, which helps to increase the relative temperature of the moisture-absorbing layer, thereby reducing condensation and improving its permeability. Designers can adjust the specific blowing temperature according to usage requirements; no specific numerical limit is specified here.

[0100] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0101] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sintering dehumidification method, characterized in that, Includes the following steps: The material to be sintered is transported to the sintering trolley; The material is sintered using a sintering trolley, so that the material gradually forms a sintered ore layer, a combustion layer, a preheating layer, a drying layer and a wetted layer from top to bottom; The material being sintered is vented from one or both sides of the sintering trolley, and the venting height is adjusted step by step based on the height change of the wet layer, so that the venting range covers at least part of the wet layer in the height direction. After the combustion layer, the preheating layer, the drying layer, and the over-wet layer disappear, the sintered ore product is obtained.

2. The sintering dehumidification method as described in claim 1, characterized in that, The process of venting the material being sintered from both sides of the sintering trolley specifically includes the following steps: The material being sintered is simultaneously vented from both sides of the sintering trolley.

3. The sintering dehumidification method as described in claim 1, characterized in that, The process of venting the material being sintered from both sides of the sintering trolley specifically includes the following steps: First, the material being sintered is vented from one side of the sintering trolley. After a preset time interval, the material being sintered is vented from the other side of the sintering trolley, thus alternating the venting operation between the two sides of the sintering trolley.

4. The sintering dehumidification method as described in claim 1, characterized in that, Ventilation structures are provided on the partitions on both sides of the sintering trolley, and exhaust structures are provided on both sides of the sintering trolley. The two exhaust structures are used to exhaust the material being sintered. The exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each of the exhaust branch pipes, and a control valve installed on each of the exhaust branch pipes. Each exhaust branch pipe has an exhaust port facing the ventilation structure. Each exhaust port is arranged sequentially along the extension direction of the sintering trolley and connected to the ventilation structure.

5. The sintering dehumidification method as described in claim 1, characterized in that, The sintering dehumidification method further includes the following steps: A ventilation operation is performed on the material being sintered from one side of the sintering trolley. The material being sintered is blown by air from the other side of the sintering trolley, and the blowing height is adjusted step by step based on the height change of the wet layer so that the blowing range covers the wet layer in the height direction.

6. The sintering dehumidification method as described in claim 5, characterized in that, A breathable structure is provided on the side partitions of the sintering trolley; An exhaust structure is provided on one side of the sintering trolley to exhaust the material being sintered. The exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each exhaust branch pipe, and a control valve provided on each exhaust branch pipe. Each exhaust branch pipe has an exhaust port facing the ventilation structure of the sintering trolley. Each exhaust port is arranged sequentially along the extension direction of the sintering trolley and connected to one of the ventilation structures. A blowing structure is provided on the other side of the sintering table to blow air onto the material being sintered. The blowing structure includes multiple blowing branch pipes, a main blowing pipe connecting each blowing branch pipe, and a control valve provided on each blowing branch pipe. Each blowing branch pipe has a blowing port facing the ventilation structure. Each blowing port is arranged sequentially along the extension direction of the sintering trolley and connected to another ventilation structure.

7. The sintering dehumidification method as described in claim 5, characterized in that, The air supply temperature for the blowing operation shall not be lower than 65°C.

8. The sintering dehumidification method as described in claim 1, characterized in that, The step-by-step adjustment of the exhaust height based on the height change of the humidification layer specifically includes the following steps: Along the conveying direction of the sintering trolley, the sintering trolley is divided into multiple exhaust sections, wherein the exhaust height of the upstream exhaust section is greater than the exhaust height of the downstream exhaust section.

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