High-temperature presintering rotary kiln

Abstract

The invention relates to the technical field of rotary kilns, in particular to a high-temperature presintering rotary kiln which comprises a kiln body, a waste gas guide assembly and a waste gas treatment part. Through the synergistic effect of the first composite air bag and cooling liquid in the auxiliary exhaust pipe, high-temperature waste gas is effectively cooled, vapor-state impurities in the waste gas are promoted to be condensed and liquefied, the risk that pipelines and waste gas treatment parts are blocked due to the fact that the impurities continuously flow along with air flow is reduced, and the efficiency and stability of follow-up waste gas treatment are guaranteed; reciprocating circulation conveying of cooling liquid is achieved through the suction pipe, the cooling liquid is mixed with low-temperature cooling liquid in the water supply tank, the temperature of the cooling liquid is further lowered, the overall heat exchange and cooling effect is improved, in the process, flowing of the cooling liquid further promotes expansion and contraction of the first composite air bag, condensed waste liquid can rapidly fall off, and the cooling effect is improved. Therefore, the first composite air bag is ensured to always keep good heat exchange performance and waste gas treatment capability.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary kilns, in particular to a high-temperature pre-firing rotary kiln. Background Art

[0002] A rotary kiln is a thermal equipment used to calcine, roast or dry granular and powdered materials. It is mainly used in the primary rough processing of powder or mineral materials, such as the firing and calcination of cement clinker; the preparation of titanium dioxide from kaolin, and the processing of rare earth industry.

[0003] Comparative document 1 discloses a material pretreatment rotary kiln with application number: 202311184976.4, which can effectively prevent the backflow of waste gas and condensed liquid, prevent some waste gas components present in the condensed liquid from flowing back into the raw materials in the pretreatment process, avoid re-contamination of the raw materials in the pretreatment process, and prevent the treatment process from being lengthened due to the backflow of waste gas and condensed liquid, and may even cause the pretreatment to fail to meet the standards and cause waste of raw materials.

[0004] In the above-mentioned actual use process, when processing some powdered materials (iron red strontium materials), sticky impurities will be generated, which will vaporize at high temperatures and flow with the exhaust gas. As the temperature drops, the gaseous impurities are easy to condense into droplets or particles during the cooling process, and are very likely to be deposited on the pipe wall or in the processing device, causing blockage and affecting the continuous and stable operation of the system. Summary of the Invention

[0005] In response to the technical problems existing in the prior art, the present invention provides a high-temperature pre-burning rotary kiln. Through the synergistic effect of the first composite airbag and the coolant in the sub-exhaust pipe, the high-temperature exhaust gas can be quickly cooled, the vaporous impurities are condensed and liquefied, and the risk of their flow and deposition in the system is reduced. At the same time, the suction pipe is used to realize the reciprocating circulation of the coolant, and it is mixed with the low-temperature coolant in the water supply tank to continuously reduce the coolant temperature and improve the overall heat exchange efficiency.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a high-temperature pre-burning rotary kiln furnace, comprising a furnace body, an exhaust gas guide assembly and an exhaust gas treatment component; the exhaust gas treatment component is connected to the furnace body through the exhaust gas guide assembly; the exhaust gas guide assembly comprises a waste liquid collection mechanism installed on the furnace body; a sub-exhaust pipe is installed on the waste liquid collection mechanism; two first support tubes are installed on the sub-exhaust pipe; a first composite air bag is installed at one end of the two first support tubes; a water supply tank is installed at the other end of the first support tube; a first electric telescopic rod is installed on the top of the water supply tank; a first extrusion plate is fixedly installed at the output end of the first electric telescopic rod; a swirl mechanism is provided in the sub-exhaust pipe; and a rotating mechanism is provided on the sub-exhaust pipe.

[0007] A main exhaust pipe is fixedly installed on the top end of the sub-exhaust pipe, and the main exhaust pipe is connected to the exhaust gas treatment component.

[0008] A suction pipe is installed on the water supply box, one end of the suction pipe is located inside the first composite airbag, and the suction pipe does not contact the inner wall of the first composite airbag.

[0009] The swirl mechanism includes a collection tank installed on the inner wall of the sub-exhaust pipe; a second composite airbag is installed on the collection tank; a first one-way valve is installed on the top of the second composite airbag; a plurality of guide plates are fixedly installed on the exhaust end of the first one-way valve; a second one-way valve is installed on the bottom end of the second composite airbag; second electric telescopic rods are installed on both sides of the sub-exhaust pipe; and second extrusion plates are fixedly installed on the output ends of the two second electric telescopic rods.

[0010] The two second extrusion plates are located on both sides of the second composite airbag, and the two second extrusion plates are located between the collecting tank and the second one-way valve.

[0011] A drain pipe is installed on the collecting tank, and the collecting tank is located below the first composite airbag. Conical blocks are installed above the plurality of guide plates.

[0012] The rotating mechanism includes a fixing frame fixed on the sub-exhaust pipe; a driving motor is fixedly mounted on the fixing frame; and an output end of the driving motor is fixedly connected to one end of the first support pipe.

[0013] The waste liquid collecting mechanism comprises a fixed shell installed on the furnace body; a first guide cover is installed on the top of the fixed shell; and a second guide cover is installed on the bottom wall inside the fixed shell.

[0014] The centrifugal force generated by the guide plate 2084 has an efficiency formula for separating exhaust gas particles: .

[0015] An application of the high-temperature pre-burning rotary kiln described in any one of the above items in the production of red strontium iron ore.

[0016] The beneficial effects of the present invention are: (1) Through the synergistic effect of the first composite airbag and the coolant in the sub-exhaust pipe, the high-temperature exhaust gas is effectively cooled, and the impurities in the gaseous state in the exhaust gas are condensed and liquefied, reducing the risk of clogging of the pipeline and exhaust gas treatment components caused by the continuous flow of the airflow, thereby ensuring the efficiency and stability of subsequent exhaust gas treatment. At the same time, the suction pipe is used to realize the reciprocating circulation of the coolant and mix it with the low-temperature coolant in the water supply tank to further reduce the coolant temperature and improve the overall heat exchange and cooling effect. In this process, the flow of the coolant also causes the first composite airbag to expand and contract, which is conducive to the rapid shedding of the condensed waste liquid and avoids its accumulation or adhesion on the surface of the airbag, thereby ensuring that the first composite airbag always maintains good heat exchange performance and exhaust gas treatment capacity.

[0017] (2) By squeezing the second composite airbag, the exhaust gas stored inside is discharged upward. During the discharge process, the exhaust gas is guided by the guide plate to form a spiral upward airflow. The spiral airflow generates a strong centrifugal force, which throws the droplets and particulate matter in the exhaust gas to the inner wall of the first composite airbag and is effectively adsorbed, thereby achieving preliminary separation and purification. At the same time, the spiral flow forms a high turbulence state on the airbag wall, destroying the thermal boundary layer and significantly improving the heat exchange efficiency between the exhaust gas and the airbag wall. In addition, the spiral airflow prolongs the residence time of the exhaust gas in the airbag, allowing it to fully contact with the second composite airbag, further enhancing the cooling effect, effectively reducing the exhaust gas temperature, reducing the residual amount of gaseous impurities therein, and improving the effect of treating gaseous impurities in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a high-temperature pre-burning rotary kiln; Figure 2 A schematic diagram of the exhaust pipe structure of a high-temperature pre-burning rotary kiln; Figure 3 A cross-sectional view of the fixed shell of a high-temperature pre-firing rotary kiln; Figure 4 A cross-sectional view of an exhaust pipe of a high-temperature pre-calcining rotary kiln; Figure 5 A three-dimensional diagram of the exhaust pipe of a high-temperature pre-firing rotary kiln; Figure 6 A high-temperature pre-burning rotary kiln Figure 5 Enlarged view of point A in the middle; Figure 7 A three-dimensional diagram of a collection tank for a high-temperature pre-burning rotary kiln; Figure 8 A schematic diagram of the partial structure of the second composite airbag of a high-temperature pre-firing rotary kiln.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows: 10. Furnace body; 20. Exhaust gas guide assembly; 201. Waste liquid collection mechanism; 2011. Fixed shell; 2012. First guide cover; 2013. Second guide cover; 202. Sub-exhaust pipe; 203. First support pipe; 204. First composite airbag; 205. Water supply tank; 206. First electric telescopic rod; 207. First extrusion plate; 208. Swirl mechanism; 2081. Collection trough; 2082. Second composite airbag; 2083. First one-way valve; 2084. Guide plate; 2085. Second one-way valve; 2086. Second electric telescopic rod; 2087. Second extrusion plate; 209. Rotating mechanism; 2091. Fixed frame; 2092. Drive motor; 30. Exhaust gas treatment component; 40. Suction pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0021] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0022] In the description of this application, the term "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described in this application as "for example" is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0023] Example 1 See also Figure 4 and Figure 6An embodiment of the present invention provides a high-temperature pre-burning rotary kiln, comprising a furnace body 10, an exhaust gas guiding assembly 20 and an exhaust gas treatment component 30; the exhaust gas treatment component 30 is connected to the furnace body 10 through the exhaust gas guiding assembly 20; the exhaust gas guiding assembly 20 comprises a waste liquid collecting mechanism 201 mounted on the furnace body 10; a sub-exhaust pipe 202 is mounted on the waste liquid collecting mechanism 201; two first support tubes 203 are mounted on the sub-exhaust pipe 202; a first composite airbag 204 is mounted at one end of the two first support tubes 203.

[0024] It should be noted that the first composite airbag 204 is circular. When the first composite airbag 204 is in working condition, the first composite airbag 204 contacts the inner wall of the sub-exhaust pipe 202. However, in order for the exhaust gas to flow upward normally, a plurality of conical bumps are provided on the surface of the first composite airbag 204. The conical bumps can be used to create a certain distance between the first composite airbag 204 and the inner wall of the sub-exhaust pipe 202, so that the exhaust gas can flow upward normally. At the same time, the conical bumps can accelerate the convergence of the condensed liquid.

[0025] A water supply tank 205 is installed at the other end of the first support tube 203; a first electric telescopic rod 206 is installed on the top of the water supply tank 205; a first extrusion plate 207 is fixedly installed at the output end of the first electric telescopic rod 206; a swirl mechanism 208 is provided in the sub-exhaust pipe 202; and a rotating mechanism 209 is provided on the sub-exhaust pipe 202.

[0026] It should be noted that the water supply tank 205 is filled with cooling liquid. When the first extrusion plate 207 squeezes the cooling liquid, the cooling liquid enters the first composite airbag 204 to cool the exhaust gas passing through the first composite airbag 204 .

[0027] A main exhaust pipe is fixedly mounted on the top end of the sub-exhaust pipe 202 , and the main exhaust pipe is connected to the exhaust gas treatment component 30 .

[0028] It should be noted that the main exhaust pipe transports the exhaust gas to the exhaust gas treatment component 30, and the exhaust gas is filtered or purified by the exhaust gas treatment component 30 to ensure that the exhaust gas meets the emission standards before being discharged.

[0029] A suction pipe 40 is installed on the water supply box 205 . One end of the suction pipe 40 is located inside the first composite airbag 204 , and the suction pipe 40 does not contact the inner wall of the first composite airbag 204 .

[0030] Specific implementation: When processing the iron red strontium material, waste gas will be generated, and the waste gas will enter the sub-exhaust pipe 202. When the waste gas flows upward in the sub-exhaust pipe 202, the output end of the first electric telescopic rod 206 drives the first extrusion plate 207 to move downward, so that the first extrusion plate 207 squeezes the coolant in the water supply tank 205, so that the coolant in the water supply tank 205 enters the first composite airbag 204 through the suction pipe 40. After the coolant is injected, the first composite airbag 204 will expand, so that the waste gas will pass through the first composite airbag 204. When the exhaust gas is around a composite airbag 204, the coolant can be used to cool the exhaust gas, so that the waste carried in the exhaust gas condenses on the surface of the first composite airbag 204. At the same time, the first electric telescopic rod 206 drives the first extrusion plate 207 to move upward, and then the suction pipe 40 is used to extract the coolant in the first composite airbag 204 into the water supply tank 205. While lowering the temperature of the coolant in the first composite airbag 204, the first composite airbag 204 will also be contracted, so that the waste liquid condensed on the surface of the first composite airbag 204 will be gathered.

[0031] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: The synergistic effect of the first composite airbag 204 and the coolant within the sub-exhaust pipe 202 effectively cools the high-temperature exhaust gas, condensing and liquefying vaporous impurities within the exhaust gas. This reduces the risk of clogging pipes and exhaust gas treatment components due to their continued flow, thereby ensuring the efficiency and stability of subsequent exhaust gas treatment. Simultaneously, the coolant is circulated back and forth through the suction pipe 40 and mixed with the low-temperature coolant in the water supply tank 205, further reducing the coolant temperature and enhancing the overall heat exchange and cooling effect. During this process, the flow of coolant also causes the first composite airbag 204 to expand and contract, facilitating the rapid shedding of condensed waste liquid and preventing its accumulation or adhesion on the airbag surface. This ensures that the first composite airbag 204 consistently maintains excellent heat exchange performance and exhaust gas treatment capabilities.

[0032] Example 2 Since the exhaust gas's natural fluidity makes contact with the first composite airbag 204, the cooling effect on the exhaust gas is limited, so it is improved; See also Figures 4 to 8An embodiment of the present invention provides a high-temperature pre-calcining rotary kiln, comprising a collecting tank 2081 installed on the inner wall of the sub-exhaust pipe 202; a second composite airbag 2082 is installed on the collecting tank 2081; a first one-way valve 2083 is installed at the top of the second composite airbag 2082; a plurality of guide plates 2084 are fixedly installed at the exhaust end of the first one-way valve 2083; a second one-way valve 2085 is installed at the bottom end of the second composite airbag 2082; second electric telescopic rods 2086 are installed on both sides of the sub-exhaust pipe 202; and second extrusion plates 2087 are fixedly installed at the output ends of the two second electric telescopic rods 2086.

[0033] It should be noted that when the two second extrusion plates 2087 squeeze the second composite airbag 2082, the first one-way valve 2083 opens, allowing the gas inside the second composite airbag 2082 to be discharged through the first one-way valve 2083. When the two second extrusion plates 2087 no longer squeeze the second composite airbag 2082, the negative pressure generated by the reset of the second composite airbag 2082 after being squeezed will cause the second one-way valve 2085 to open, thereby allowing the exhaust gas below the second composite airbag 2082 to enter the second composite airbag 2082.

[0034] The two second extrusion plates 2087 are located on both sides of the second composite airbag 2082 , and the two second extrusion plates 2087 are located between the collecting tank 2081 and the second one-way valve 2085 .

[0035] It should be noted that the first composite airbag 204 and the second composite airbag 2082 are made of a mixture of metal parts and rubber layers. The metal parts are mostly made of high-strength steel or soft copper rolled steel. The rubber layer is made of wear-resistant and aging-resistant synthetic rubber. Fiber cloth is added to improve pressure resistance and durability. The metal structure is wrapped with rubber to form a closed air cavity. The rubber and metal are combined by vulcanization bonding or mechanical interlocking to ensure the firmness of the interface. When gas is injected, the internal pressure of the airbag increases, and the rubber layer expands outward under the action of air pressure, pushing the metal skeleton to undergo elastic deformation, and the deformation range can reach 30-50%.

[0036] A drain pipe is installed on the collecting tank 2081 , and the collecting tank 2081 is located below the first composite airbag 204 . Conical blocks are installed above the plurality of guide plates 2084 .

[0037] It should be noted that one end of the drain pipe is located outside the sub-exhaust pipe 202, so when the waste liquid in the collection tank 2081 needs to be cleaned, the waste liquid in the collection tank 2081 can be discharged through the drain pipe on the collection tank 2081.

[0038] It should be noted that the conical blocks above the multiple guide plates 2084 are used to guide the condensed liquid dripping from the first composite airbag 204, so that when the condensed liquid directly above the first one-way valve 2083 drips, the conical blocks can guide the dripping condensed liquid to avoid entering the first one-way valve 2083.

[0039] Specific implementation: When the exhaust gas is reduced, the output end of the second electric telescopic rod 2086 is controlled to move back and forth. When the output end of the second electric telescopic rod 2086 moves, the output end of the second electric telescopic rod 2086 will first drive the second extrusion plate 2087 to squeeze the second composite airbag 2082, so that the gas in the second composite airbag 2082 is discharged through the first one-way valve 2083. At the same time as the exhaust gas is discharged, the exhaust gas is guided by the guide plate 2084 to rotate and move upward, and then the spiral exhaust gas comes into contact with the first composite airbag 204.

[0040] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: By squeezing the second composite airbag 2082, the exhaust gas stored inside is discharged upward. During the discharge process, the exhaust gas is guided by the guide plate 2084 to form a spiral upward airflow. The spiral airflow generates a strong centrifugal force, which throws the droplets and particulate matter in the exhaust gas to the inner wall of the first composite airbag 204 and is effectively adsorbed, thereby achieving preliminary separation and purification. At the same time, the spiral flow forms a high turbulence state on the airbag wall, destroying the thermal boundary layer and significantly improving the heat exchange efficiency between the exhaust gas and the airbag wall. In addition, the spiral airflow prolongs the residence time of the exhaust gas in the airbag, allowing it to fully contact the second composite airbag 2082, further enhancing the cooling effect, effectively reducing the exhaust gas temperature, reducing the residual amount of vaporous impurities therein, and improving the effect of treating vaporous impurities in the exhaust gas.

[0041] Example 3 Since the first composite airbag 204 cools the exhaust gas locally, it is easy to cause a high temperature in the local area, which affects the subsequent cooling effect of the exhaust gas, so it is improved; See also Figure 3 and Figure 4 An embodiment of the present invention provides a high-temperature pre-firing rotary kiln, comprising a fixing frame 2091 fixed on the sub-exhaust pipe 202; a driving motor 2092 is fixedly mounted on the fixing frame 2091; and an output end of the driving motor 2092 is fixedly connected to one end of the first support tube 203.

[0042] The waste liquid collecting mechanism 201 includes a fixed shell 2011 mounted on the furnace body 10 ; a first guide cover 2012 is mounted on the top of the fixed shell 2011 ; and a second guide cover 2013 is mounted on the bottom wall inside the fixed shell 2011 .

[0043] Specifically, after the use of the furnace body 10 is finished, the residual exhaust gas in its sub-exhaust pipe 202 will gradually solidify the impurities in the exhaust gas as the temperature drops, and then the condensed waste liquid will flow downward, so that the waste liquid flows through the sub-exhaust pipe 202 to the inner wall of the first guide cover 2012, and finally enters the fixed shell 2011, completing the collection of the residual waste liquid in the sub-exhaust pipe 202, avoiding the residual waste liquid from entering the furnace body 10 and affecting the normal use of the subsequent furnace body 10.

[0044] Specific implementation: While the first composite airbag 204 is processing the exhaust gas, the drive motor 2092 is controlled by the control switch to operate, so that the output end of the drive motor 2092 drives the first support tube 203 to rotate, and then the first support tube 203 drives the first composite airbag 204 to rotate, thereby increasing the fluidity of the coolant in the first composite airbag 204. At the same time, the exhaust gas can be cooled by using different positions of the first composite airbag 204 to improve the cooling effect.

[0045] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: By rotating the first composite airbag 204, the fluidity of the coolant inside it is effectively enhanced, and the overall heat exchange efficiency is improved, thereby significantly improving the cooling effect of the first composite airbag 204. At the same time, the rotating structure can prevent the bottom exhaust gas from continuously contacting the same local area of ​​the first composite airbag 204, preventing the problem of excessive temperature due to local heat accumulation, ensuring uniform temperature distribution on the airbag surface, avoiding thermal stress concentration and degradation of cooling performance. This design not only improves the cooling stability of the first composite airbag 204 during continuous operation, but also extends its service life, ensuring the efficiency and reliability of the exhaust gas cooling treatment process.

[0046] The centrifugal force generated by the guide plate 2084 has an efficiency formula for separating exhaust gas particles: .

[0047] Case simulation: Input parameters: Gas flow Q =10m³ / s, density ρg =20kg / m³, viscosity \mu_g = 1.8 \times 10^{-5} \, \text{Pa·s} droplets dp =20 μ m, ρl=800kg / m³ Geometric dimensions: D =0.5m, H =2m, r min=0.1m Calculation steps: Initially: Tangential velocity Inlet velocity .

[0048] Sedimentation velocity

[0049] Axial speed

[0050] Separation efficiency

[0051] After optimization: Sedimentation velocity

[0052] Separation efficiency

[0053] Final conclusion: The separation efficiency increased from 6.3% to 32.1%, which fully demonstrated the significant positive effect of centrifugal force on separation efficiency.

[0054] An application of the high-temperature pre-burning rotary kiln described in any one of the above items in the production of red strontium iron ore.

[0055] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A high temperature pre-burning rotary kiln, characterized in that: It comprises a furnace body (10), an exhaust gas guiding assembly (20) and an exhaust gas treatment component (30); The exhaust gas treatment component (30) is connected to the furnace body (10) via the exhaust gas guide assembly (20); The exhaust gas guiding assembly (20) comprises a waste liquid collecting mechanism (201) mounted on the furnace body (10); A sub-exhaust pipe (202) is installed on the waste liquid collection mechanism (201); Two first support tubes (203) are installed on the sub-exhaust pipe (202); A first composite airbag (204) is installed at one end of the two first support tubes (203); A water supply tank (205) is installed at the other end of the first support tube (203); A first electric telescopic rod (206) is installed on the top of the water supply tank (205); A first extrusion plate (207) is fixedly mounted on the output end of the first electric telescopic rod (206); A swirl mechanism (208) is provided in the sub-exhaust pipe (202); The sub-exhaust pipe (202) is provided with a rotating mechanism (209).

2. A high temperature pre-burning rotary kiln according to claim 1, characterized in that: A main exhaust pipe is fixedly mounted on the top end of the sub-exhaust pipe (202), and the main exhaust pipe is connected to the exhaust gas treatment component (30).

3. A high temperature pre-burning rotary kiln according to claim 1, characterized in that: A suction pipe (40) is installed on the water supply box (205), one end of the suction pipe (40) is located inside the first composite airbag (204), and the suction pipe (40) does not contact the inner wall of the first composite airbag (204).

4. A high temperature pre-burning rotary kiln according to claim 1, characterized in that: The swirl mechanism (208) comprises a collection tank (2081) mounted on the inner wall of the sub-exhaust pipe (202); A second composite airbag (2082) is installed on the collection tank (2081); A first one-way valve (2083) is installed at the top end of the second composite airbag (2082); A plurality of guide plates (2084) are fixedly mounted on the exhaust end of the first one-way valve (2083); A second one-way valve (2085) is installed at the bottom end of the second composite airbag (2082); Second electric telescopic rods (2086) are installed on both sides of the sub-exhaust pipe (202); The output ends of the two second electric telescopic rods (2086) are both fixedly mounted with second extrusion plates (2087).

5. A high temperature pre-burning rotary kiln according to claim 4, characterized in that: The two second extrusion plates (2087) are located on both sides of the second composite airbag (2082), and the two second extrusion plates (2087) are located between the collecting tank (2081) and the second one-way valve (2085).

6. A high temperature pre-burning rotary kiln according to claim 4, characterized in that: A liquid drain pipe is installed on the collection tank (2081), and the collection tank (2081) is located below the first composite airbag (204). Conical blocks are installed above the plurality of guide plates (2084).

7. The high-temperature pre-firing rotary kiln according to claim 1, characterized in that: The rotating mechanism (209) comprises a fixing frame (2091) fixed on the sub-exhaust pipe (202); A driving motor (2092) is fixedly mounted on the fixing frame (2091); The output end of the driving motor (2092) is fixedly connected to one end of the first supporting tube (203).

8. The high-temperature pre-firing rotary kiln according to claim 1, characterized in that: The waste liquid collection mechanism (201) comprises a fixed shell (2011) mounted on the furnace body (10); A first guide cover (2012) is installed on the top of the fixed shell (2011); A second guide cover (2013) is mounted on the bottom wall inside the fixed shell (2011).

9. The high-temperature pre-firing rotary kiln according to claim 4, characterized in that: The centrifugal force generated by the guide plate (2084) has an efficiency formula for separating exhaust gas particles: .

10. Use of the high-temperature pre-sintering rotary kiln according to any one of claims 1 to 9 in the production of red strontium iron ore.

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