Ore tank for lump ore drying

Abstract

The ore tank for lump ore drying comprises an ore tank body and further comprises a steam heating structure and an air injection heating structure, the air injection heating structure is arranged on the ore tank body, the air injection end of the air injection heating structure extends into the ore tank body, and the steam heating structure comprises a steam heating assembly, a first heat preservation and conduction assembly and a first pipeline. The steam heating assembly and the first heat preservation and conduction assembly are both arranged on the periphery of the ore tank body, the steam heating assembly is arranged above the first heat preservation and conduction assembly, the bottom of the steam heating assembly communicates with the top of the first heat preservation and conduction assembly through a first pipeline, and a steam inlet is formed in the upper portion of the steam heating assembly. A steam outlet is formed in the lower portion of the first heat preservation and conduction assembly. The lump ore can be dried through hot waste gas of a steel mill, large drying equipment does not need to be designed and manufactured, the defects that the large drying equipment is large in occupied space and high in energy consumption are overcome, the cost is greatly saved, and the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lump ore drying, and particularly relates to an ore trough for lump ore drying. Background Art

[0002] The raw materials for pig iron required by the iron and steel industry are mainly provided by blast furnace smelting. The improvement of blast furnace smelting technology and the reduction of costs have extremely profound significance for promoting the development of iron and steel enterprises. The basic link of blast furnace intensification smelting is burden preparation. As one of the main components of the burden charged into the furnace, the addition amount of natural lump ore can reach up to 20%. Since the moisture content of lump ore is relatively high, after the high-moisture lump ore is charged into the furnace, the drying of moisture consumes energy, and the drying process takes a certain amount of time, which increases the coke ratio of the blast furnace, thus affecting the permeability of the blast furnace burden layer, resulting in an increase in the blast furnace smelting cost and affecting the stability of the furnace condition. Therefore, reducing the moisture content of lump ore is of great significance for reducing the ironmaking cost and enhancing the stability of the furnace condition.

[0003] At present, in order to reduce the adverse effects of the moisture in lump ore on blast furnace production, domestic research scholars have conducted extensive research on lump ore drying technology. The patent "A Blast Furnace Lump Ore Drying and Screening Device" (publication number CN112648838B) applied by the typical Jiangsu Binxin Iron and Steel Group Co., Ltd. discloses a blast furnace lump ore drying and screening device, which consists of a support box, a drying drum machine, a combustion furnace, a dust removal device and a screening device. The purified blast furnace gas and the combustion-supporting air provided by the combustion-supporting fan enter the burner of the combustion furnace at the same time and are ignited to release heat, providing high-temperature hot air for the inner cavity of the drying drum machine to achieve the purpose of drying the lump ore. The above utility model can effectively remove the moisture in the lump ore. However, the above scheme has the following problems. First, the sites of existing iron and steel enterprises are tense, and it is difficult to arrange special drying equipment in the operation area to dry the lump ore. In addition, the above method needs to consume fuel to dry the lump ore, with a large amount of energy consumption, increasing the cost of blast furnace smelting, and the waste gas generated by fuel combustion will also have an adverse impact on the environment.

[0004] To sum up, there is an urgent need for an ore trough for lump ore drying to solve or at least partially solve the problems existing in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an ore trough for lump ore drying, aiming to solve the problem of high energy consumption in the prior art. The specific technical solution is as follows:

[0006] An ore bin for drying lump ore includes an ore bin body, a steam heating structure and a jet heating structure. The jet heating structure is arranged on the ore bin body, and the jet end of the jet heating structure extends into the ore bin body. The steam heating structure includes a steam heating component, a first heat preservation and heat conduction component and a first pipeline. The steam heating component and the first heat preservation and heat conduction component are both arranged on the outer periphery of the ore bin body. The steam heating component is arranged above the first heat preservation and heat conduction component, and the bottom of the steam heating component is communicated with the top of the first heat preservation and heat conduction component through the first pipeline. A steam inlet is arranged at the upper part of the steam heating component, and a steam outlet is arranged at the lower part of the first heat preservation and heat conduction component.

[0007] Further, the steam heating component includes a first shell, a low-level liquid gauge, a high-level liquid gauge and a first solenoid valve. The first shell surrounds the ore bin body, and a first cavity is arranged in the first shell. The steam inlet is arranged on the first shell and communicated with the first cavity. The low-level liquid gauge is arranged in the first cavity and located at the lower part of the first cavity. The high-level liquid gauge is arranged in the first cavity and located above the low-level liquid gauge. The first solenoid valve is arranged on the first pipeline.

[0008] Further, the first heat preservation and heat conduction component includes a second shell, a second pipeline, a low water level gauge, a high water level gauge and a second solenoid valve. The second shell surrounds the ore bin body, and a second cavity is arranged in the second shell. The first pipeline is communicated with the top of the second cavity. The second pipeline is arranged at the bottom of the second shell and communicated with the bottom of the second cavity, and the second pipeline is used for the steam outlet. The low water level gauge is arranged at the lower part in the second cavity, the high water level gauge is arranged at the upper part in the second cavity, and the second solenoid valve is arranged on the second pipeline.

[0009] Further, the ore bin body includes a straight cylinder section arranged above and a conical cylinder section arranged below. The steam heating component and the first heat preservation and heat conduction component are both arranged on the outer periphery of the straight cylinder section.

[0010] The steam heating structure further includes a second heat preservation and heat conduction component. The second heat preservation and heat conduction component is arranged on the conical cylinder section of the ore bin body. The second heat preservation and heat conduction component includes a third shell, a third pipeline and a third solenoid valve. The third shell surrounds the conical cylinder section of the ore bin body, and a third cavity is arranged in the third shell. The top of the third cavity is communicated with the second pipeline. The third pipeline is arranged at the lower part of the third shell and communicated with the third cavity. The third solenoid valve is arranged on the third pipeline.

[0011] Further, the first heat preservation and heat conduction component further includes a first thermometer. The first thermometer is arranged in the second cavity, arranged below the low water level gauge, and electrically connected to the second solenoid valve; the second heat preservation and heat conduction component further includes a second thermometer. The second thermometer is arranged in the third cavity and electrically connected to the third solenoid valve.

[0012] Furthermore, the jet heating structure includes an air supply pipe, an annular pipe, and a nozzle. The annular pipe is arranged around the ore bin body. The air supply pipe is connected to the annular pipe. The nozzle is arranged on the annular pipe and is connected to the annular pipe. The nozzle end away from the annular pipe extends into the ore bin body, and an avoidance hole is arranged on the third housing, and the nozzle passes through from the avoidance hole.

[0013] Furthermore, a plurality of nozzles are arranged, and the plurality of nozzles are arranged circumferentially along the annular pipe.

[0014] Furthermore, a filter screen is arranged at the nozzle of the nozzle, and the filter screen is fixedly connected to the nozzle.

[0015] Furthermore, mounting holes corresponding to the nozzles are provided on the ore bin body, the nozzles are arranged through the mounting holes, and sealant is filled between the inner wall of the mounting hole and the outer wall of the nozzle.

[0016] Furthermore, a maintenance port is provided at the lower part of the annular pipe, a sealing plate is installed at the maintenance port, and the maintenance port is arranged corresponding to the nozzles one by one.

[0017] Applying the technical solution of the present utility model has the following beneficial effects:

[0018] During the production process of steel mills, dry hot waste gas and hot water vapor are often generated. For example, during the process of cooling slag by a ring cooler, a large amount of high-temperature waste gas is generated, and the temperature is between 200 degrees Celsius and 300 degrees Celsius. By introducing the hot waste gas of the ring cooler into the jet heating structure through a pipeline, the ore bin is dried by jetting hot air through the jet heating mechanism. By introducing the hot water vapor into the steam heating structure through a pipeline, the hot water vapor enters from the steam inlet, and the outer wall of the ore bin is heated by the steam heating component, and the lump ore in the ore bin is dried by heat conduction. After the steam condenses into water in the steam heating component, it is transported to the heat preservation and heat conduction component through the first pipeline. At this time, the temperature of the condensed water in the heat preservation and heat conduction component is still relatively high (the temperature of the condensed water is above 60 degrees Celsius), and the lump ore in the ore bin is heated and dried by heat conduction. The lump ore in the ore bin body is dried by jetting hot air through the jet heating structure, the lump ore in the ore bin body is heated and dried by arranging a steam heating structure outside the ore bin body, and the lump ore in the ore bin body is heated and dried by the combination of the jet heating structure and the steam heating structure. The steam heating structure not only has the function of heating and drying the ore bin, but also has the function of heat preservation for the ore bin, preventing the heat in the ore bin from dissipating, and improving the drying efficiency of the lump ore in the ore bin and the utilization rate of the heat in the hot waste gas.

[0019] In addition, the device directly transforms the existing ore bin, and the lump ore can be dried by using the hot waste gas of the steel mill without designing and manufacturing large-scale drying equipment, solving the disadvantages of large space occupation and high energy consumption of using large-scale drying equipment, greatly saving costs and reducing the floor area.

[0020] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to Figures 1-7 for a further detailed description of the present utility model. Brief Description of the Drawings

[0021] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic diagram of the overall structure of a ore trough for drying lump ore of the present utility model;

[0023] Figure 2 is a schematic diagram of the internal structure of a steam heating component in a ore trough for drying lump ore of the present utility model;

[0024] Figure 3 is a schematic diagram of the internal structure of a first heat preservation and heat conduction component in a ore trough for drying lump ore of the present utility model;

[0025] Figure 4 is a schematic diagram of the overall structure of a second heat preservation and heat conduction component and a jet heating structure in a ore trough for drying lump ore of the present utility model;

[0026] Figure 5 is a schematic diagram of a partial structure at the nozzle in a ore trough for drying lump ore of the present utility model;

[0027] Figure 6 is Figure 1 an enlarged view of the position A in

[0028] Figure 7 is Figure 1 a schematic diagram of a partial structure in the B direction in

[0029] Among them, 1. Ore bin body; 11. Straight barrel section; 12. Tapered barrel section; 13. Mounting hole; 2. Steam heating structure; 21. Steam heating assembly; 211. Steam inlet; 212. First shell; 2121. First cavity; 213. Low-level liquid gauge; 214. High-level liquid gauge; 215. First solenoid valve; 22. First heat preservation and heat conduction assembly; 221. Second shell; 2211. Second cavity; 222. Second pipeline; 223. Low water level gauge; 224. High water level gauge; 225. Second solenoid valve; 226. First thermometer; 23. First pipeline; 24. Second heat preservation and heat conduction assembly; 241. Third shell; 2411. Third cavity; 242. Third pipeline; 243. Third solenoid valve; 244. Second thermometer; 3. Jet heating structure; 31. Air supply pipe; 32. Annular pipe; 321. Inspection port; 322. Sealing plate; 33. Sprayer; 331. Filter screen; 34. Sealant. Detailed implementation manners

[0030] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below, and preferred embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0032] Embodiment:

[0033] Refer to Figures 1-7 , this embodiment provides an ore bin for drying lump ore, aiming to solve the problem of high energy consumption in the prior art.

[0034] Through research, it is found that if the surplus hot waste gas inside the iron and steel enterprise can be directly connected to the blast furnace lump ore bin to dry the lump ore, not only can the heat in the surplus hot waste gas be effectively utilized, but also the investment in directly drying the lump ore in the lump ore bin is small and the practicability is stronger. For example, the hot waste gas that cannot be effectively utilized by the annular cooler (generally with a temperature of 60 to 200 degrees Celsius) is directly introduced into the lump ore bin for drying.

[0035] The specific technical solutions are as follows:

[0036] An ore bin for drying lump ore includes an ore bin body 1, and further includes a steam heating structure 2 and a jet heating structure 3. The jet heating structure 3 is arranged on the ore bin body 1, and the jet end of the jet heating structure 3 extends into the ore bin body 1 for jetting hot air into the ore bin body 1. The steam heating structure 2 includes a steam heating assembly 21, a first heat preservation and heat conduction assembly 22, and a first pipeline 23. Both the steam heating assembly 21 and the first heat preservation and heat conduction assembly 22 are arranged on the outer periphery of the ore bin body 1. The steam heating assembly 21 is arranged above the first heat preservation and heat conduction assembly 22, and the bottom of the steam heating assembly 21 is communicated with the top of the first heat preservation and heat conduction assembly 22 through the first pipeline 23. A steam inlet 211 is arranged on the upper part of the steam heating assembly 21, and a steam outlet is arranged on the lower part of the first heat preservation and heat conduction assembly 22.

[0037] Understandably, during the steel plant production process, dry hot waste gas and hot water vapor are often generated. For example, during the process of cooling slag by a ring cooler, a large amount of high-temperature waste gas is generated, with a temperature between 200 degrees Celsius and 300 degrees Celsius. By leading the hot waste gas of the ring cooler through a pipeline to the jet heating structure 3, the ore bin is jetted and dried through the jet heating mechanism. By introducing the hot water vapor through a pipeline into the steam heating structure 2, the hot water vapor enters from the steam inlet 211, and the outer wall of the ore bin is heated by the steam heating assembly 21, and the lump ore in the ore bin is dried through heat conduction. After the steam condenses into water in the steam heating assembly 21, it is transported to the heat preservation and heat conduction assembly through the first pipeline 23. At this time, the temperature of the condensed water in the heat preservation and heat conduction assembly is still relatively high (the temperature of the condensed water is above 60 degrees Celsius), and the lump ore in the ore bin is heated and dried through heat conduction. The lump ore in the ore bin body 1 is dried by jetting hot air through the jet heating structure 3, the lump ore in the ore bin body 1 is heated and dried by arranging the steam heating structure 2 outside the ore bin body 1, and the lump ore in the ore bin body 1 is heated and dried by the combination of the jet heating structure 3 and the steam heating structure 2. The steam heating structure 2 not only has the function of heating and drying the ore bin, but also has the function of heat preservation for the ore bin, preventing the heat in the ore bin from dissipating, and improving the drying efficiency of the lump ore in the ore bin and the utilization rate of the heat in the hot waste gas.

[0038] This device directly transforms the existing ore bin, and can dry the lump ore by using the hot waste gas of the steel plant, without the need to design and manufacture large-scale drying equipment, solving the disadvantages of large space occupation and high energy consumption of using large-scale drying equipment, greatly saving costs and reducing the floor area.

[0039] Further, the steam heating assembly 21 includes a first housing 212, a low-level liquid gauge 213, a high-level liquid gauge 214, and a first solenoid valve 215. The first housing 212 is arranged around the ore bin body 1, and a first cavity 2121 is arranged inside the first housing 212. The steam inlet 211 is arranged on the first housing 212 and communicates with the first cavity 2121. The low-level liquid gauge 213 is arranged inside the first cavity 2121 and is located at the lower part of the first cavity 2121. The high-level liquid gauge 214 is arranged inside the first cavity 2121 and is located above the low-level liquid gauge 213. The first solenoid valve 215 is arranged on the first pipe 23. The low-level liquid gauge 213 is electrically connected to the first solenoid valve 215, and the high-level liquid gauge 214 is electrically connected to the first solenoid valve 215.

[0040] Understandably, steam enters the first cavity 2121 of the first housing 212 from the steam inlet 211 and contacts the inner wall of the first cavity 2121. The temperature of the inner wall of the first cavity 2121 is lower than the temperature of the steam. Therefore, the steam condenses into water after encountering the cold, and the heat in the steam is conducted to the ore bin through the first housing 212 by heat conduction, thereby heating the lump ore in the ore bin. When the water level of the condensed water in the first cavity 2121 rises to the high-level liquid gauge 214, the high-level liquid gauge 214 sends a signal, and the first solenoid valve 215 responds to the signal sent by the high-level liquid gauge 214 and opens, so that the condensed water in the first cavity 2121 is discharged from the first pipe 23. When the water level of the condensed water in the first cavity 2121 drops to the low-level liquid gauge 213, the low-level liquid gauge 213 sends a signal, and the first solenoid valve 215 responds to the signal sent by the low-level liquid gauge 213 and closes, and so on. On the one hand, the condensed water in the first cavity 2121 is discharged in time, which is beneficial to the smooth entry of water vapor into the first cavity 2121 and keeps the first cavity 2121 in a relatively high temperature environment all the time.

[0041] A pressure sensor is also arranged in the first cavity 2121 to monitor the pressure in the first cavity 2121. When the pressure in the first cavity 2121 is too high, it is necessary to pay attention to controlling the gas pressure entering the first cavity 2121 in time, so that the first housing 212 works within the normal pressure range to prevent the first housing 212 from being damaged due to excessive pressure.

[0042] Further, the first heat preservation and heat conduction component 22 includes a second housing 221, a second pipe 222, a low water level gauge 223, a high water level gauge 224, and a second solenoid valve 225. The second housing 221 is arranged around the ore bin body 1, and a second cavity 2211 is arranged inside the second housing 221. The first pipe 23 communicates with the top of the second cavity 2211. The second pipe 222 is arranged at the bottom of the second housing 221 and communicates with the bottom of the second cavity 2211. The second pipe 222 is used for the steam outlet. The low water level gauge 223 is arranged in the lower part of the second cavity 2211, the high water level gauge 224 is arranged in the upper part of the second cavity 2211, the second solenoid valve 225 is arranged on the second pipe 222, and the low water level gauge 223 is electrically connected to the second solenoid valve 225, and the high water level gauge 224 is electrically connected to the second solenoid valve 225.

[0043] It can be understood that when the condensed water in the first cavity 2121 flows into the second cavity 2211 through the first pipe 23, the liquid level in the second cavity 2211 rises accordingly. When the liquid level in the second cavity 2211 rises to the high water level gauge 224, the high water level gauge 224 sends a signal, and the second solenoid valve 225 responds to the signal sent by the high water level gauge 224 and opens the second solenoid valve 225, so that the water in the second cavity 2211 flows out from the second pipe 222, thereby reducing the water level in the second cavity 2211. When the water level in the second cavity 2211 drops to the low water level gauge 223, the low water level gauge 223 sends a signal, and the second solenoid valve 225 responds to the signal sent by the low water level gauge 223 and closes the second solenoid valve 225, thereby enabling the water level in the second cavity 2211 to rise slowly again, and so on. During the slow rise of the water level, the heat of the condensed water in the second cavity 2211 will also be conducted to the ore bin through the wall of the second housing 221 to heat and keep warm the ore blocks in the ore bin.

[0044] Further, the ore bin body 1 includes a straight cylinder section 11 arranged above and a conical cylinder section 12 arranged below. The steam heating component 21 and the first heat preservation and heat conduction component 22 are both arranged on the outer periphery of the straight cylinder section 11. The steam heating structure 2 further includes a second heat preservation and heat conduction component 24, and the second heat preservation and heat conduction component 24 is arranged on the conical cylinder section 12 of the ore bin body 1. The second heat preservation and heat conduction component 24 includes a third housing 241, a third pipe 242, and a third solenoid valve 243. The third housing 241 is arranged around the conical cylinder section 12 of the ore bin body 1, a third cavity 2411 is arranged inside the third housing 241, the top of the third cavity 2411 communicates with the second pipe 222, the third pipe 242 is arranged at the lower part of the third housing 241, and the third pipe 242 communicates with the third cavity 2411. The third solenoid valve 243 is arranged on the third pipe 242.

[0045] Understandably, the lower part of the ore bin body 1 is arranged in a conical shape to facilitate the discharging of lumpy ore in the ore bin body 1. By arranging the second heat preservation and heat conduction assembly 24 on the outer periphery of the conical barrel section 12, the conical barrel section 12 of the ore bin is heated and insulated. The water in the second cavity 2211 flows from the second pipeline 222 into the third cavity 2411 in the third housing 241 and fills the third cavity 2411. When the temperature of the water in the third cavity 2411 drops to the set temperature, the third solenoid valve 243 is opened to drain the water in the third cavity 2411. After the water in the third cavity 2411 is completely drained, the third solenoid valve 243 is closed, and the condensed water conveyed by the second pipeline 222 continues to be stored, and this process is repeated.

[0046] Furthermore, the first heat preservation and heat conduction assembly 22 further includes a first thermometer 226. The first thermometer 226 is arranged in the second cavity 2211, below the low water level gauge 223, and the first thermometer 226 is electrically connected to the second solenoid valve 225; the second heat preservation and heat conduction assembly 24 further includes a second thermometer 244. The second thermometer 244 is arranged in the third cavity 2411, and the second thermometer 244 is electrically connected to the third solenoid valve 243.

[0047] Specifically, the temperature of the water in the second cavity 2211 is detected by the first thermometer 226, and the temperature of the water in the third cavity 2411 is detected by the second thermometer 244. The first thermometer 226 is set for temperature, and the temperature value of the first thermometer 226 is set to 60 degrees Celsius. When the first thermometer 226 detects that the temperature of the water in the second cavity 2211 is lower than 60 degrees Celsius, it sends a signal. The second solenoid valve 225 responds to the signal sent by the first thermometer 226 and opens the second solenoid valve 225 to let the water in the second cavity 2211 flow out. The second thermometer 244 is set for temperature, and the temperature value of the second thermometer 244 is set to 45 degrees Celsius. When the second thermometer 244 detects that the temperature of the water in the third cavity 2411 is lower than 45 degrees Celsius, it sends a signal. The third solenoid valve 243 responds to the signal sent by the second thermometer 244 and opens the third solenoid valve 243 to let the water in the third cavity 2411 flow out; when the second thermometer 244 detects that the temperature of the water in the third cavity 2411 is higher than 45 degrees Celsius, it sends a signal. The third solenoid valve 243 responds to the signal sent by the second thermometer 244 and closes the third solenoid valve 243 to keep the water in the third cavity 2411 in the third cavity 2411.

[0048] Understandably, the steam heating component 21, the first heat preservation and heat conduction component 22, and the second heat preservation and heat conduction component 24 are arranged in sequence from top to bottom on the outer peripheral side of the ore bin, and the temperature of the steam heating component 21 is higher than that of the first heat preservation and heat conduction component 22, and then higher than that of the second heat preservation and heat conduction component 24, forming a temperature gradient from top to bottom, and heating and drying the lump ore in the ore bin in sections. During the upward movement of the water vapor in the lump ore, it prevents the water vapor moving to the top of the ore bin from condensing into water.

[0049] Furthermore, the jet heating structure 3 includes an air supply pipe 31, a ring pipe 32, and a nozzle 33. The ring pipe 32 is arranged around the ore bin body 1. The air supply pipe 31 is communicated with the ring pipe 32. The nozzle 33 is arranged on the ring pipe 32 and is communicated with the ring pipe 32. The nozzle end of the nozzle 33 away from the ring pipe 32 extends into the ore bin body 1, and an avoidance hole is arranged on the third shell 241, and the nozzle 33 passes through from the avoidance hole.

[0050] Understandably, hot air is introduced from the outside through the air supply pipe 31, so that the hot air flows from the outside to the ring pipe 32 and is sprayed into the ore bin from the nozzles 33 on the ring pipe 32 to dry the lump ore in the ore bin. And by arranging an avoidance hole on the third shell 241, the jet end of the nozzle 33 can smoothly extend into the ore bin body 1.

[0051] Furthermore, a plurality of nozzles 33 are arranged, and the plurality of nozzles 33 are evenly arranged along the circumferential direction of the ring pipe 32.

[0052] Understandably, by spraying hot air into the ore bin simultaneously through a plurality of nozzles 33, on the one hand, the amount of sprayed hot air is increased, and on the other hand, by spraying and drying multiple positions simultaneously through a plurality of nozzles 33, the drying in the ore bin is more uniform.

[0053] Furthermore, a filter screen 331 is arranged at the nozzle of the nozzle 33, and the filter screen 331 is fixedly connected to the nozzle 33.

[0054] Understandably, by arranging the filter screen 331 at the nozzle 33, it prevents the lump ore in the ore bin from entering the inside of the nozzle 33 and causing blockage to the nozzle 33.

[0055] Furthermore, an installation hole 13 is provided on the ore bin body 1 corresponding to the nozzle 33. The nozzle 33 passes through the installation hole 13, and a sealant 34 is filled between the inner wall of the installation hole 13 and the outer wall of the nozzle 33.

[0056] Understandably, the nozzle 33 extends into the ore bin through the installation hole 13, and can directly spray the hot air conveyed by the arch air pipe into the ore bin to dry the lump ore inside the ore bin. The gap between the nozzle 33 and the inner arm of the installation hole 13 is blocked by the sealant 34 to prevent the hot air from leaking from this gap. In addition, this structure facilitates the disassembly and assembly of the nozzle 33.

[0057] Further, a maintenance opening 321 is provided at the lower part of the loop pipe 32, and a sealing plate 322 is installed at the maintenance opening 321. The maintenance opening 321 and the spray head 33 are arranged in one-to-one correspondence.

[0058] It can be understood that when the spray head 33 is damaged, the sealing plate 322 can be removed to facilitate the maintenance of the spray head 33. Additionally, when in normal use, the maintenance opening 321 is blocked by the sealing plate 322 to prevent hot air from leaking through the maintenance opening 321.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ore trough for drying lump ore, comprising an ore trough body (1), characterized in that: It also comprises a steam heating structure (2) and an air jet heating structure (3), wherein the air jet heating structure (3) is arranged on the ore chute body (1), and the air jet end of the air jet heating structure (3) extends into the ore chute body (1). The steam heating structure (2) comprises a steam heating component (21), a first heat-insulating and heat-conducting component (22) and a first pipeline (23); the steam heating component (21) and the first heat-insulating and heat-conducting component (22) are both arranged on the periphery of the ore tank body (1); the steam heating component (21) is arranged above the first heat-insulating and heat-conducting component (22); the bottom of the steam heating component (21) is connected to the top of the first heat-insulating and heat-conducting component (22) through the first pipeline (23); a steam inlet (211) is arranged at the top of the steam heating component (21); and a steam outlet is arranged at the bottom of the first heat-insulating and heat-conducting component (22).

2. The ore trough for lump ore drying according to claim 1, characterized in that: The steam heating component (21) comprises a first shell (212), a low-level liquid level gauge (213), a high-level liquid level gauge (214) and a first solenoid valve (215); the first shell (212) is arranged around the ore chute body (1); a first cavity (2121) is arranged in the first shell (212); the steam inlet (211) is arranged on the first shell (212) and communicates with the first cavity (2121); the low-level liquid level gauge (213) is arranged in the first cavity (2121) and is located at the lower part of the first cavity (2121); the high-level liquid level gauge (214) is arranged in the first cavity (2121) and is located above the low-level liquid level gauge (213); and the first solenoid valve (215) is arranged on the first pipe (23).

3. The ore trough for drying lump ore according to claim 1, characterized in that: The first heat-insulating and heat-conducting component (22) comprises a second shell (221), a second pipe (222), a low water level gauge (223), a high water level gauge (224) and a second solenoid valve (225); the second shell (221) is arranged around the ore tank body (1); a second cavity (2211) is arranged in the second shell (221); the first pipe (23) is communicated with the top of the second cavity (2211); the second pipe (222) is arranged at the bottom of the second shell (221); the second pipe (222) is communicated with the bottom of the second cavity (2211); the second pipe (222) is used for steam outlet; the low water level gauge (223) is arranged at the lower part of the second cavity (2211); the high water level gauge (224) is arranged at the upper part of the second cavity (2211); and the second solenoid valve (225) is arranged on the second pipe (222).

4. The ore trough for drying lump ore according to claim 3, characterized in that: The ore chute body (1) comprises a straight cylinder section (11) arranged at the top and a conical cylinder section (12) arranged at the bottom, the steam heating component (21) and the first heat-insulating and heat-conducting component (22) are both arranged on the outer periphery of the straight cylinder section (11). The steam heating structure (2) further comprises a second heat-insulating and heat-conducting component (24), which is arranged on the conical cylinder section (12) of the ore chute body (1), and the second heat-insulating and heat-conducting component (24) comprises a third shell (241), a third pipe (242) and a third solenoid valve (243). The third shell (241) is arranged around the conical cylinder section (12) of the ore chute body (1), a third cavity (2411) is arranged in the third shell (241), the top of the third cavity (2411) is connected to the second pipe (222), the third pipe (242) is arranged at the bottom of the third shell (241), and the third pipe (242) is connected to the third cavity (2411), and the third solenoid valve (243) is arranged on the third pipe (242).

5. The ore trough for drying lump ore according to claim 4, characterized in that: The first heat-insulating and heat-conducting component (22) further comprises a first thermometer (226), the first thermometer (226) being arranged in the second cavity (2211), the first thermometer (226) being arranged at the lower part of the low water level gauge (223), and the first thermometer (226) being electrically connected to the second solenoid valve (225); The second heat-insulating and heat-conducting component (24) further comprises a second thermometer (244), wherein the second thermometer (244) is arranged in the third cavity (2411), and the second thermometer (244) is electrically connected to the third solenoid valve (243).

6. The ore trough for lump ore drying according to claim 4 or 5, characterized in that: The jet heating structure (3) comprises an air supply pipe (31), an annular pipe (32) and a nozzle (33); the annular pipe (32) is arranged around the ore chute body (1); the air supply pipe (31) is communicated with the annular pipe (32); the nozzle (33) is arranged on the annular pipe (32) and is communicated with the annular pipe (32); the nozzle (33) extends into the interior of the ore chute body (1) away from the nozzle end of the annular pipe (32); and an avoidance hole is arranged on the third shell (241), and the nozzle (33) passes through the avoidance hole.

7. The ore trough for lump ore drying according to claim 6, characterized in that: A plurality of the nozzles (33) are arranged, and the plurality of the nozzles (33) are arranged in an annular direction along the annular tube (32).

8. The ore trough for lump ore drying according to claim 6, characterized in that: A filter screen (331) is arranged at the nozzle of the nozzle (33), and the filter screen (331) is fixedly connected to the nozzle (33).

9. The ore trough for drying lump ore according to claim 6, characterized in that: The ore trough body (1) is provided with a mounting hole (13) corresponding to the nozzle (33), the nozzle (33) is arranged through the mounting hole (13), and a sealant (34) is filled between the inner wall of the mounting hole (13) and the outer wall of the nozzle (33).

10. The ore trough for lump ore drying according to claim 7, characterized in that: The lower part of the ring pipe (32) is provided with an inspection port (321), a sealing plate (322) is installed at the inspection port (321), and the inspection port (321) and the nozzle (33) are arranged in a one-to-one correspondence.

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