Sintering dehumidification method

Abstract

The invention provides a sintering dehumidification method, which relates to the technical field of sintering, and comprises the following steps: conveying a material to be sintered to a sintering trolley; the sintering trolley is used for conducting sintering operation on the materials, so that the materials gradually form a sinter layer, a combustion layer, a preheating layer, a drying layer and an over-wet layer from top to bottom; carrying out air draft operation on the sintered material, and carrying out step-by-step adjustment on the air draft height based on the height change of the over-wet layer, so that the air draft range covers at least part of the over-wet layer in the height direction; and after the combustion layer, the preheating layer, the drying layer and the over-wet layer disappear, obtaining a sintered ore finished product. Water vapor in the material can be efficiently removed through air draft operation, so that the condensation amount of the water vapor is reduced, the thickness of an over-wet layer is reduced, and the sintering effect is improved. And moreover, by controlling the air draft height step by step, the problem of waste of the air draft amount is obviously reduced under the condition that the dehumidification requirement of the over-wet layer is met.

Description

Technical Field

[0001] The invention relates to the technical field of sintering, and in particular to a sintering dehumidification method. Background Art

[0002] Sintering production is an important part of the production process of the steel industry and is the basic condition for ensuring the normal production of blast furnace ironmaking. In the sintering process, one of the most important links is the series of physical and chemical reactions of the materials on the sintering machine trolley. During the process of sintering the mixed material with ventilation, five areas with different properties will appear along the entire material layer. The top layer is the sintering zone, and the lower layers are the combustion zone, preheating zone, drying zone and over-wet zone (or original mixed material zone). As the sintering time increases, each zone gradually disappears, leaving only the sintering zone. Among them, the exhaust gas coming down from the drying zone contains a large amount of water vapor. When these exhaust gases containing water vapor encounter the cold material at the bottom, the temperature suddenly drops. When the temperature of these exhaust gases containing water vapor drops below the temperature of condensing into water droplets - the dew point temperature (52℃~65℃), the water vapor changes from gas to liquid, causing the moisture content of the lower mixed material to increase continuously and form an over-wet zone. The formation of the over-wet zone will deteriorate the air permeability of the material layer, thereby affecting the sintering effect. Therefore, how to reduce the occurrence of over-humidification during the sintering process to improve the sintering quality has become a technical problem that needs to be solved urgently. 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 object of the present invention can be achieved by adopting the following technical scheme. The present invention provides a sintering dehumidification method, comprising the following steps:

[0005] Conveying the materials to be sintered onto the sintering trolley;

[0006] The material is sintered by using a sintering trolley, so that the material gradually forms a sintering layer, a combustion layer, a preheating layer, a drying layer and an over-wetting layer from top to bottom;

[0007] Performing a ventilation operation on the material being sintered, and adjusting the ventilation height step by step based on the height change of the over-wet layer, so that the ventilation range covers at least a part of the over-wet layer in the height direction;

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

[0009] In a preferred embodiment of the present invention, the exhaust operation on the material during sintering specifically comprises the following steps:

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

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

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

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

[0014] The material being sintered is first evacuated from one side of the sintering trolley, and then evacuated from the other side of the sintering trolley after a preset time interval, thereby alternately evacuating the material being sintered from both sides of the sintering trolley.

[0015] In a preferred embodiment of the present invention, a ventilation structure is provided on both side partitions of the sintering trolley, and an exhaust structure is provided on both sides of the sintering trolley, and the two exhaust structures are used to exhaust the material being sintered;

[0016] Among them, the exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each of the exhaust branch pipes, and a control valve arranged on each of the exhaust branch pipes. The exhaust branch pipe has an exhaust port arranged facing the breathable structure, and each of the exhaust ports is arranged in sequence along the extension direction of the sintering trolley and connected to the breathable structure.

[0017] In a preferred embodiment of the present invention, the exhaust operation on the material during sintering specifically comprises 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 comprises the following steps:

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

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

[0022] An exhaust structure is arranged on one side of the sintering trolley, and the exhaust structure is used to exhaust the material in sintering; wherein the exhaust structure comprises a plurality of exhaust branch pipes, an exhaust main pipe connected to each of the exhaust branch pipes, and a control valve arranged on each of the exhaust branch pipes, and the exhaust branch pipe has an exhaust port arranged facing the air permeable structure of the sintering trolley, and each of the exhaust ports is arranged in sequence along the extension direction of the sintering trolley and connected to one of the air permeable structures;

[0023] A blowing structure is arranged on the other side of the sintering table, and the blowing structure is used to blow air to the material being sintered; wherein the exhaust structure includes a plurality of blowing branch pipes, a blowing main pipe connected to each of the blowing branch pipes, and a control valve arranged on each of the blowing branch pipes, and the blowing branch pipe has a blowing port arranged facing the breathable structure, and each of the blowing ports is arranged in sequence along the extension direction of the sintering trolley and is connected to another breathable structure.

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

[0025] In a preferred embodiment of the present invention, the step-by-step adjustment of the ventilation height based on the height change of the super-humidified layer specifically comprises the following steps:

[0026] The sintering trolley is divided into a plurality of exhaust sections along the conveying direction of the sintering trolley, wherein the exhaust height of the exhaust section located upstream is greater than the exhaust height of the exhaust section located downstream.

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

[0028] When the sintering dehumidification method of the present invention is used, the material to be sintered is transported to the sintering trolley, and the sintering trolley is used to perform sintering operations on the material, so that the material gradually forms a sintering ore layer, a combustion layer, a preheating layer, a drying layer and an over-wet layer, and as the sintering time increases, the combustion layer, the preheating layer, the drying layer and the over-wet layer will gradually disappear until only the sintering ore layer remains, and a sintered ore product is obtained at this time.

[0029] During the sintering process, since the waste gas generated by the drying layer contains a large amount of water vapor, when the waste gas containing water vapor sinks to the cold material at the bottom of the material, it is affected by the temperature of the cold material, causing the water vapor in the waste gas to condense into water droplets, causing the moisture in the bottom of the material to continue to increase and form an over-wet layer. The existence of the over-wet layer reduces the air permeability of the material, thereby affecting the sintering effect of the material.

[0030] In order to reduce the thickness of the over-humidified layer to improve the air permeability of the material, the sintering dehumidification method of the present invention also includes exhausting the material being sintered. The exhaust operation can efficiently remove the waste gas and water vapor in the material, thereby reducing the condensation of water vapor, thereby reducing the thickness of the over-humidified layer and improving the sintering effect. In addition, the exhaust height is adjusted step by step based on the height change of the over-humidified layer, so that the exhaust range covers at least part of the over-humidified layer in the height direction. By controlling the exhaust height step by step, the problem of exhaust waste is significantly reduced while meeting the dehumidification needs of the over-humidified layer, which also helps to reduce the operating costs of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0033] Figure 1 A schematic diagram of a process of the sintering dehumidification method of the present invention;

[0034] Figure 2 A schematic diagram of the three-dimensional structure of an embodiment of the exhaust assembly of the present invention;

[0035] Figure 3 A schematic side view of the structure of an embodiment of the exhaust section of the present invention;

[0036] Figure 4 A schematic side view of the structure of an embodiment of the exhaust assembly of the present invention;

[0037] Figure 5 The figure is a schematic side structural diagram of an embodiment of the air exhaust port of the present invention.

[0038] Reference numerals in the above drawings:

[0039] 100, sintering trolley; 110, partition;

[0040] 200, exhaust structure; 201, exhaust branch pipe; 202, exhaust main pipe; 203, exhaust port; 204, control valve;

[0041] 300, first ventilation section;

[0042] 400, second ventilation section;

[0043] 500, the third ventilation section;

[0044] 600. The fourth ventilation section. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Please refer to 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 : conveying the material to be sintered to the sintering trolley 100 .

[0048] Step S2000: Utilize the sintering trolley 100 to perform sintering operation on the material, so that the material gradually forms a sintering layer, a combustion layer, a preheating layer, a drying layer and an over-wetting layer from top to bottom.

[0049] Step S3000: ventilate the material being sintered, and adjust the vent height step by step based on the height change of the over-humidified layer, so that the vent range covers at least part of the over-humidified layer in the height direction. Preferably, the vent range covers the over-humidified layer in the height direction.

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

[0051] On the whole, when the sintering dehumidification method is used, the material to be sintered is transported to the sintering trolley 100, and the sintering trolley 100 is used to perform sintering operations on the material, so that the material gradually forms a sintering ore layer, a combustion layer, a preheating layer, a drying layer and an over-moisture layer, and as the sintering time increases, the combustion layer, the preheating layer, the drying layer and the over-moisture layer will gradually disappear until only the sintering ore layer remains, and a sintered ore product is obtained at this time.

[0052] During the sintering process, since the waste gas generated by the drying layer contains a large amount of water vapor, when the waste gas containing water vapor sinks to the cold material at the bottom of the material, it is affected by the temperature of the cold material, causing the water vapor in the waste gas to condense into water droplets, causing the moisture in the bottom of the material to continue to increase and form an over-wet layer. The existence of the over-wet layer reduces the air permeability of the material, thereby affecting the sintering effect of the material.

[0053] In order to reduce the thickness of the over-humidified layer to improve the air permeability of the material, the sintering dehumidification method of the present invention also includes exhausting the material being sintered. The exhaust operation can efficiently remove the waste gas and water vapor in the material, thereby reducing the condensation amount of water vapor, thereby reducing the thickness of the over-humidified layer and improving the sintering effect. In addition, the exhaust height is adjusted step by step based on the height change of the over-humidified layer, so that the exhaust range covers at least part of the over-humidified layer in the height direction. By controlling the exhaust height step by step, the problem of exhaust waste is significantly reduced while meeting the dehumidification needs of the over-humidified layer, which also helps to reduce the operating cost of the equipment.

[0054] In an embodiment of the present invention, the exhaust operation of the material being sintered specifically includes the following steps:

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

[0056] By exhausting the materials being sintered from both sides of the sintering trolley 100, the exhaust efficiency is improved, and the moisture in the over-moistened layer is removed more efficiently, thereby improving the air permeability of the over-moistened layer.

[0057] Furthermore, the material being sintered is detected in real time, and the air extraction volume on both sides is dynamically adjusted according to the real-time detected thickness of the over-humidified layer and the quality of the sintered product, so as to ensure the best quality of the sintered product. The start time of the real-time detection is: starting from the rear end of the ignition furnace.

[0058] In a feasible implementation manner of the present invention, the exhaust operation of the material being sintered from both sides of the sintering trolley 100 specifically includes the following steps:

[0059] Step S3110: exhaust air from both sides of the sintering trolley 100 simultaneously to the material being sintered.

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

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

[0062] First, one side of the sintering trolley 100 performs exhaust operation on the material being sintered, and after a preset time interval, the other side of the sintering trolley 100 performs exhaust operation on the material being sintered, so that the two sides of the sintering trolley 100 perform exhaust operation on the material being sintered alternately.

[0063] By alternately exhausting the materials being sintered from both sides of the sintering trolley 100, the exhaust structures 200 on both sides of the sintering trolley 100 can operate alternately, and then a set of exhaust power devices is used to alternately provide exhaust power to the two sets of exhaust structures 200, so that the two sets of exhaust structures 200 can be driven to operate at the same time, thereby reducing equipment costs.

[0064] Furthermore, by controlling the two sets of exhaust structures 200 to switch after a preset time interval, the movement distance of the sintering trolley 100 is limited during the preset time interval, thereby reducing the influence of the single-sided suction, ie, the switching process, on the exhaust and dehumidification effect.

[0065] Designers can adjust the specific time size of the preset interval according to usage needs. For example, the preset interval can be 10s, 30s, 1min or other durations, and no specific numerical limit is set here.

[0066] Of course, in other feasible embodiments, designers can adjust the changing rules of the exhaust operation according to usage requirements, and no specific restrictions are made here.

[0067] In an embodiment of the present invention, the step-by-step adjustment of the ventilation height based on the height change of the super-humidified layer specifically includes the following steps:

[0068] Step S3200: Divide the sintering trolley 100 into a plurality of exhaust sections along the conveying direction of the sintering trolley 100 , 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 possible embodiment, if 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 carriage 100 is equally divided into a first suction section 300 , a second suction section 400 , a third suction section 500 and a fourth suction section 600 .

[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 made here.

[0072] In an embodiment of the present invention, Figure 5 In the illustrated embodiment, the exhaust height of the first exhaust section 300 is the same or approximately the same as the laying thickness of the material on the sintering trolley 100, the exhaust height of the second exhaust section 400 is approximately three quarters of the laying thickness of the material on the sintering trolley 100, the exhaust height of the third exhaust section 500 is approximately one half of the laying thickness of the material on the sintering trolley 100, and the exhaust height of the fourth exhaust section 600 is approximately one quarter of the laying thickness of the material 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 step by step, the setting area of ​​the exhaust port 203 is reduced while meeting the exhaust and dehumidification needs of the super-humidified layer, thereby reducing the equipment investment cost.

[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 usage requirements, and no specific restrictions are made here.

[0075] In an embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 In the illustrated embodiment, ventilation structures are provided on the partitions 110 on both sides of the sintering trolley 100 , and exhaust structures 200 are provided on both sides of the sintering trolley 100 , respectively, and the two exhaust structures 200 are used to exhaust the materials being sintered.

[0076] Specifically, the exhaust structure 200 includes a plurality of exhaust branch pipes 201, an exhaust main pipe 202 connecting the exhaust branch pipes 201, and a control valve 204 arranged on each exhaust branch pipe 201. The exhaust branch pipe 201 has an exhaust port 203 arranged facing the air-permeable structure. The exhaust ports 203 are arranged in sequence along the extension direction of the sintering trolley 100 and connected to the air-permeable structure.

[0077] Furthermore, along the transport direction of the sintering trolley 100, as Figure 5 In the embodiment shown, the diameter of the exhaust branch pipe 201 in each exhaust section is gradually reduced. The designer can adjust the diameter of each air duct according to the use requirements, and no specific numerical value is imposed here.

[0078] From the foregoing, it can be seen that as the humidity of the material on the sintering trolley 100 decreases, the area of ​​the exhaust port 203 gradually decreases. Correspondingly, by gradually reducing the diameter of each exhaust branch pipe 201, each exhaust branch pipe 201 is matched with the exhaust port 203. This is beneficial to maintaining the suction power of each exhaust port 203, avoiding causing greater disturbance to the material, and improving the stability of the exhaust process.

[0079] The designer can adjust the shape and diameter of each exhaust branch pipe 201 according to the use requirements, and no specific numerical limit is imposed here. For example, the exhaust branch pipe 201 in each air duct section is connected to the exhaust main pipe 202 by changing from a square pipe to a square pipe. Round tube.

[0080] Furthermore, the connection between the exhaust branch pipe 201 and the exhaust main pipe 202 can be achieved by hole welding, and the quality of the weld can be guaranteed and ultrasonic testing can be performed to ensure that there is no air leakage.

[0081] In the embodiment of the present invention, the air inlets 203 are expanded, and the air inlets 203 are connected in sequence. By expanding the air inlets 203, the air inlets 203 can be better covered or roughly covered on the air permeable structure of the partition 110, thereby improving the air extraction effect.

[0082] Furthermore, by sequentially connecting a plurality of air inlets 203, it is advantageous to eliminate the gaps between adjacent air inlets 203 and to seal the gaps between adjacent air inlets 203. Designers can adjust the sealing structure between adjacent air inlets 203 according to usage requirements, and no specific limitation is made here.

[0083] In the embodiment of the present invention, a control valve 204 is provided on the exhaust branch pipe 201. The designer can adjust the specific model of the control valve 204 according to the use requirements, and no specific limitation is made here. Preferably, the control valve 204 is a butterfly valve.

[0084] In a feasible embodiment, a butterfly valve is installed on the circular pipe section of the exhaust branch pipe 201, and the butterfly valve can be installed on the plane of the sintering trolley 100, so as to facilitate manual operation. Of course, the butterfly valve can also be controlled by a PLC controller or on-site control.

[0085] Specifically, when the sintering trolley 100 is equally divided into the first exhaust section 300, the second exhaust section 400, the third exhaust section 500 and the fourth exhaust section 600, the opening of the butterfly valve in the first exhaust section 300 can be set to 50%, the opening of the butterfly valve in the second exhaust section 400 can be set to 40%, the opening of the butterfly valve in the third exhaust section 500 can be set to 30%, and the opening of the butterfly valve in the fourth exhaust section 600 can be set to 20%. In addition, the opening of the butterfly valve can be adjusted in real time according to the quality of the sintered ore product, 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 size of each butterfly valve according to production needs, and no specific limitation is made here.

[0087] In an embodiment of the present invention, the exhaust operation of the material being sintered specifically includes the following steps:

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

[0089] By exhausting the material being sintered from one side of the sintering trolley 100 , the humidity on one side of the material can be reduced, thereby improving the air permeability of the over-humidified layer.

[0090] Furthermore, the other side of the sintering trolley 100 does not perform the exhaust operation, but a ventilation structure can still be provided, so that the outside air can enter the over-humidified layer through the ventilation structure and flow toward the exhaust structure 200. In this process, the outside air can increase the air flow of the over-humidified layer, improve the air permeability of the over-humidified layer, and the outside air can also carry out some moisture, thereby reducing the water content of the over-humidified layer.

[0091] In an embodiment of the present invention, the sintering dehumidification method further comprises the following steps:

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

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

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

[0095] Specifically, a ventilation structure is arranged on the partitions 110 on both sides of the sintering trolley 100; an exhaust structure 200 is arranged on one side of the sintering trolley 100, and the exhaust structure 200 is used to exhaust the materials in sintering; wherein the exhaust structure 200 includes a plurality of exhaust branch pipes 201, an exhaust main pipe 202 connected to each exhaust branch pipe 201, and a control valve 204 arranged on each exhaust branch pipe 201, the exhaust branch pipe 201 has an exhaust port 203 arranged facing the ventilation structure of the sintering trolley 100, and each exhaust port 203 is arranged in sequence along the extension direction of the sintering trolley 100 and connected to one of the ventilation structures.

[0096] A blowing structure is arranged on the other side of the sintering table, and the blowing structure is used to blow air to the material being sintered; wherein the blowing structure includes a plurality of blowing branch pipes, a blowing main pipe connected to the blowing branch pipes, and a control valve 204 arranged on each blowing branch pipe, and the blowing branch pipe has a blowing port arranged facing the breathable structure, and each blowing port is arranged in sequence along the extension direction of the sintering trolley 100 and connected to another breathable structure.

[0097] The designer can adjust the specific model of the control valve 204 according to the use requirements, and no specific limitation is made here. Preferably, the control valve 204 is a butterfly valve. The specific structure of the exhaust structure 200 can refer to the above, and will not be repeated here. In addition, the specific structure of the blowing structure can also refer to the exhaust structure 200, and the difference between the two is that the flow direction of the gas is different.

[0098] From the above, we can know that when the exhaust gas temperature of water vapor drops below the temperature at which it condenses into water droplets - the dew point temperature (52℃~65℃), the water vapor changes from gas to liquid, causing the moisture content of the lower layer of mixed materials to continue to increase and form an over-wet layer. The formation of an over-wet layer will deteriorate the air permeability of the material layer.

[0099] In order to solve the above problems, in the embodiment of the present invention, the air supply temperature of the blowing operation is not less than 65°C. By making the air supply temperature of the blowing operation not less than 65°C, the over-humidification layer is purged with hot air, which helps to increase the relative temperature of the over-humidification layer, thereby reducing the amount of condensation, and further improving the air permeability of the over-humidification layer. The designer can adjust the specific value of the blowing temperature according to the use needs, and no specific numerical limit is made here.

[0100] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

[0101] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit 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: The steps include: Conveying the materials to be sintered to the sintering trolley; The material is sintered by using a sintering trolley, so that the material gradually forms a sintering layer, a combustion layer, a preheating layer, a drying layer and an over-wetting layer from top to bottom; Performing a ventilation operation on the material being sintered, and adjusting the ventilation height step by step based on the height change of the over-wet layer, so that the ventilation range covers at least a part of the over-wet layer in the height direction; When the combustion layer, the preheating layer, the drying layer and the over-wet layer disappear, a sintered ore product is obtained.

2. The sintering dehumidification method according to claim 1, characterized in that: The exhaust operation on the material in sintering specifically comprises the following steps: The material being sintered is evacuated from both sides of the sintering trolley.

3. The sintering dehumidification method according to claim 2, characterized in that: The exhaust operation of the material being sintered from both sides of the sintering trolley specifically includes the following steps: The material being sintered is evacuated simultaneously from both sides of the sintering trolley.

4. The sintering dehumidification method according to claim 2, characterized in that: The exhaust operation of the material being sintered from both sides of the sintering trolley specifically includes the following steps: The material being sintered is first evacuated from one side of the sintering trolley, and then evacuated from the other side of the sintering trolley after a preset time interval, thereby alternately evacuating the material being sintered from both sides of the sintering trolley.

5. The sintering dehumidification method according to claim 2, characterized in that: A ventilation structure is arranged on the partitions on both sides of the sintering trolley, and an exhaust structure is arranged on both sides of the sintering trolley respectively, and the two exhaust structures are used to exhaust the material in sintering; Among them, the exhaust structure includes multiple exhaust branch pipes, an exhaust main pipe connecting each of the exhaust branch pipes, and a control valve arranged on each of the exhaust branch pipes. The exhaust branch pipe has an exhaust port arranged facing the breathable structure, and each of the exhaust ports is arranged in sequence along the extension direction of the sintering trolley and connected to the breathable structure.

6. The sintering dehumidification method according to claim 1, characterized in that: The exhaust operation on the material in sintering specifically comprises the following steps: The material being sintered is evacuated from one side of the sintering trolley.

7. The sintering dehumidification method according to claim 6, characterized in that: The sintering dehumidification method also includes the following steps: The material being sintered is blown from the other side of the sintering trolley, and the blowing height is adjusted step by step based on the height change of the over-wet layer, so that the blowing range covers the over-wet layer in the height direction.

8. The sintering dehumidification method according to claim 7, characterized in that: A ventilation structure is arranged on the partitions on both sides of the sintering trolley; An exhaust structure is arranged on one side of the sintering trolley, and the exhaust structure is used to exhaust the material in sintering; wherein the exhaust structure comprises a plurality of exhaust branch pipes, an exhaust main pipe connected to each of the exhaust branch pipes, and a control valve arranged on each of the exhaust branch pipes, and the exhaust branch pipe has an exhaust port arranged facing the air permeable structure of the sintering trolley, and each of the exhaust ports is arranged in sequence along the extension direction of the sintering trolley and connected to one of the air permeable structures; A blowing structure is arranged on the other side of the sintering table, and the blowing structure is used to blow air to the material being sintered; wherein the exhaust structure includes a plurality of blowing branch pipes, a blowing main pipe connected to each of the blowing branch pipes, and a control valve arranged on each of the blowing branch pipes, and the blowing branch pipe has a blowing port arranged facing the breathable structure, and each of the blowing ports is arranged in sequence along the extension direction of the sintering trolley and is connected to another breathable structure.

9. The sintering dehumidification method according to claim 7, characterized in that: The air supply temperature of the blowing operation is not less than 65°C.

10. The sintering dehumidification method according to claim 1, characterized in that: The step-by-step adjustment of the ventilation height based on the height change of the super-humidified layer specifically comprises the following steps: The sintering trolley is divided into a plurality of exhaust sections along the conveying direction of the sintering trolley, wherein the exhaust height of the exhaust section located upstream is greater than the exhaust height of the exhaust section located downstream.

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