Annular dryer for lump mine

Abstract

The utility model discloses a ring type dryer for lump mine. The ring type dryer comprises a rack, a rotary track, a trolley, an upper fan cover, a lower fan cover, a hot air mechanism, a material distributing mechanism, a discharging mechanism and a rotary driving mechanism. The ring type dryer is designed according to the characteristics of lump ore, can adapt to the characteristics that high-moisture lump ore is large in viscosity and prone to material blocking, can meet the medium-temperature drying working condition that the air temperature is about 300 DEG C, and is reliable in equipment operation and controllable in drying effect while large handling capacity is achieved. The material thickness can be adjusted according to the change of actual working conditions; the production efficiency is high; the investment and maintenance cost is low; the drying effect is uniform;

Description

TECHNICAL FIELD

[0001] The utility model relates to lump ore drying equipment, concretely relates to a ring dryer for lump ore belongs to lump ore drying technical field. BACKGROUND

[0002] Steel as the industrialization process irreplaceable structural, functional material, its consumption occupies more than 95% of total metal consumption in quite a long time. The raw material of pig iron required by steel industry is mainly provided by blast furnace smelting, and the improvement of blast furnace smelting technology and the reduction of cost have a profound significance for promoting the development of steel enterprises. The basic link of blast furnace intensified smelting is precision material operation, and the common furnace charge of blast furnace includes sinter, pellet and natural lump ore. The so-called reasonable blast furnace charge structure is that by adjusting the proportion of sinter, pellet and natural lump ore in the furnace iron ore, the most suitable matching ratio of different kinds of iron ore is found out, so that the economic and technical indicators of the blast furnace smelting under the charge structure are relatively ideal, and the unit pig iron smelting consumption cost is relatively lowest. Research shows that the cost of raw materials such as iron ore accounts for about 60% of the total cost of pig iron, and the market price of lump ore is basically the same as that of powder ore, and the cost price is far lower than that of sinter and pellet. Increasing the proportion of lump ore is an effective measure to reduce the cost of blast furnace raw materials. In addition, under the condition of the same pig iron scale, replacing part of sinter or pellet with lump ore is equivalent to reducing about 42 kg of standard coal consumption (replacing sinter) or about 18 kg of standard coal consumption (replacing pellet) per ton of lump ore. By increasing the proportion of lump ore and establishing a new economic charge structure, the energy consumption and pollutants in the preparation process of sinter and pellet are reduced, which is an important technical measure to realize low carbon, emission reduction and clean production.

[0003] At present, the furnace lump ore is generally high in viscosity and high in powder content, especially the overseas imported lump ore, which generally contains about 6% of water and more than 20% of powder. Due to water transportation, long transportation distance, many logistics links, open-air storage in the turnover process, increased damage in loading and unloading, etc., the powder content of lump ore is even more than 30%. At the same time, the increase of water content in lump ore causes a large amount of powder to adhere to the surface of lump ore. The screen plate of vibrating screen is often blocked during screening, so that the screening effect cannot be achieved, and the powder adhered to the surface of lump ore finally enters the blast furnace, which affects the permeability of blast furnace, increases the smelting cost of blast furnace, and affects the stable and smooth operation of blast furnace. Therefore, the reduction of water content in lump ore is of great significance to reduce the cost of ironmaking and enhance the stability of furnace condition.

[0004] In the prior art, a cylindrical dryer or a shaft furnace is generally used for lump ore drying, wherein: the cylindrical dryer can meet a large processing capacity, but needs high-temperature air drying, the hot air only contacts the surface of the lump ore material, the gas-solid heat exchange efficiency is low, the energy consumption is relatively high, the equipment wear is large, and the production cost is high; for the high-temperature dust generated during processing, the slurry generated by the spray foam dust removal not only needs to be discharged after sedimentation, but also increases the process space and discharge difficulty; during operation, due to sealing and other problems, the dust generated during drying is easy to pollute the environment. And the lump ore is dried by using the shaft furnace, which is mostly transformed from the shaft furnace for producing pellets, and has the problems of small processing capacity, many lump ore burstings, serious dust pollution, uneven drying, and clogging of the drying bed. Content of the utility model

[0005] In view of the problems of the existing drying equipment in the prior art that the drying efficiency and effect are not ideal when processing lump ore, the utility model provides a ring dryer for lump ore, which is designed according to the characteristics of lump ore, can adapt to the characteristics of high-moisture lump ore with large viscosity and easy clogging, can meet the medium-temperature drying working condition with an air temperature of about 300 DEG C, realizes a large processing capacity, the equipment operation is reliable, the drying effect is controllable, has the characteristics of high production efficiency, low investment and maintenance cost, and uniform drying effect.

[0006] In order to realize the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0007] A ring dryer for lump ore, the ring dryer comprises a rack, a rotating track, a trolley, an upper air cover, a lower air cover, a hot air mechanism, a material distribution mechanism, a discharging mechanism and a rotating drive mechanism. The rotating track is arranged on the rack, and the trolley is arranged on the rotating track. The upper air cover is arranged above the rotating track and the trolley. The lower air cover is arranged below the rotating track and the trolley air box. The hot air mechanism and the discharging mechanism are both arranged on the lower air cover. The material distribution mechanism is arranged on the upper air cover. The rotating drive mechanism is arranged on one side of the rack and connected with the rotating track and the trolley, and the rotating drive mechanism drives the rotating track and the trolley to rotate on the rack.

[0008] As a preferred, the ring dryer is sequentially divided into a feeding section, a hot air section, a transition cooling section and a discharging section along the rotating operation direction of the trolley. A feeding port connected with the material distribution mechanism is arranged on the upper air cover above the feeding section. An air inlet connected with the hot air mechanism is arranged on the lower air cover below the hot air section. A discharging port connected with the discharging mechanism is arranged on the lower air cover below the discharging section. A dust removal exhaust port is further arranged on the upper air cover above the hot air section.

[0009] Preferably, the hot air mechanism comprises a hot air blower, a hot air supply main pipe and hot air supply branch pipes. The hot air blower is connected to the air inlet end of the hot air supply main pipe. The hot air supply main pipe is connected to the air inlets of the lower air duct through the hot air supply branch pipes.

[0010] Preferably, the inside of the lower air duct below the discharging section is divided into multiple air inlet zones, each of which is independently provided with an air inlet, and the hot air supply main pipe is connected to each air inlet through multiple hot air supply branch pipes. Preferably, a flow regulating valve is independently arranged on each hot air supply branch pipe.

[0011] Preferably, the rail body of the rotating track at the discharging mechanism is upwardly protruded to form a curved track section, and a trolley resetting and jolting mechanism is further arranged below the curved track section.

[0012] Preferably, the trolley resetting and jolting mechanism comprises a resetting roller and a jolting device. The resetting roller is arranged below the curved track section through a support. The jolting device is arranged on one side of the support and connected to the support. The jolting device causes the resetting roller to vibrate synchronously by vibrating the support. Preferably, a damping base is further arranged at the bottom of the support. Preferably, the jolting device is one of a vibration motor, a jolting pendulum and a jolting air hammer.

[0013] Preferably, a first position detection switch and a second position detection switch are respectively arranged upstream and downstream of the curved track section along the running direction of the trolley. When the trolley runs to the first position detection switch, the trolley body just contacts the resetting roller. When the trolley runs to the second position detection switch, the trolley body just separates from the resetting roller.

[0014] Preferably, the bottom grate of the trolley is a flexible grate comprising a grate frame and flexible grate bars. The grate frame is a frame structure with an open middle part, and the flexible grate bars are metal chains composed of multiple metal rings connected in series. Multiple flexible grate bars are installed in the open middle part of the grate frame in a parallel manner and cover the open middle part. Preferably, the hole diameter of the metal ring, the maximum gap between any two adjacent flexible grate bars and the maximum gap between the flexible grate bar at the outer edge and the grate frame are all not greater than the minimum particle size of the block ore to be dried.

[0015] Preferably, a support bar is further arranged in the open middle part of the grate frame, which is located below the flexible grate bars and vertically or crosswise contacts the flexible grate bars.

[0016] As a preference, the material distributing mechanism comprises an upper material bin and a lower material bin. The upper material bin is designed as an inverted funnel with a narrow top and a wide bottom, and the lower material bin is designed as a funnel with a wide top and a narrow bottom. The upper opening of the lower material bin is in communication with the lower opening of the upper material bin. A distributing cone is arranged in the upper material bin. In the running direction of the trolley, the front and rear side walls of the lower material bin are inclined side walls, and the other two side walls of the lower material bin are vertical side walls. Preferably, a vibrating motor is arranged on each of the front and rear side walls of the lower material bin.

[0017] As a preference, the lower wall of the front side wall of the lower material bin is arranged vertically to form a vertical portion. A discharge port is arranged at the bottom of the vertical portion and is provided with a movable valve. An access door is further arranged on the rear side wall of the lower material bin.

[0018] As a preference, a composite sealing mechanism is further arranged between the lower air hood and the rotating track. The composite sealing mechanism comprises an inner aluminum plate layer, a middle aluminum silicate thermal insulation cotton layer and an outer elastic sealing layer. Preferably, the elastic sealing layer is a polytetrafluoroethylene layer wrapped with a spring.

[0019] As a preference, the thickness of the aluminum plate layer is 5-10 mm, preferably 6-8 mm. The thickness of the aluminum silicate thermal insulation cotton layer is 120-150 mm, preferably 125-145 mm. The thickness of the elastic sealing layer is 50-100 mm, preferably 60-90 mm.

[0020] As a preference, the material discharging mechanism is a discharging belt.

[0021] As a preference, at least one bulk material collecting belt conveyor is further arranged below the lower air hood.

[0022] In the utility model, wet lump ore is transferred into the distributing mechanism by the upstream rubber belt machine, is continuously and evenly distributed on the rotary trolley by the distributing mechanism, the trolley and the rotary frame (namely the rotary track) make horizontal circular motion on the supporting roller under the drive of the rotary drive mechanism; in the hot air section, the hot air mechanism blows about 300 DEG C hot flue gas into the lower air hood under the trolley through the blast box, the hot air passes through the grate plate of the trolley and exchanges heat with the wet lump ore under the action of positive pressure, and the moisture of the lump ore is dried to the process set value. When the trolley rotates to the unloading section, the wet lump ore is also dried to the set moisture content. At this time, the rocker arm wheel of the trolley starts to ascend along the curved track section, the trolley slowly overturns along with the trolley shaft under the gravity eccentricity of the trolley itself and the material, and the lump ore is unloaded into the chute through the unloading mechanism. After the trolley unloads, it starts to reset under the assistance of the reset roller, and the rocker arm wheel also descends along the curved track, forcing the trolley to rotate reversely until it is flat, at which time the ring dryer completes the whole drying process of the lump ore and enters the next working cycle. The material in the chute is discharged to the downstream rubber belt machine through the lower unloading port. The scattered material falling from the gap of the trolley grate plate is collected by the blast box, and the scattered material is unloaded to the fully-sealed scattered material collecting belt machine through the electric double-layer unloading valve of the blast box, and is transferred to the process scattered material rubber belt machine. The scattered material collecting mechanism can be operated automatically, the double-layer unloading valve unloading pipe is inserted into the ring belt machine cover, and a dust removal point needs to be arranged beside each insertion point. The upper air hood of the hot air section is provided with a waste gas dust removal port, and a process supporting dust removal system collects and treats the waste gas.

[0023] In the utility model, the dryer can be provided with multiple sets of rotary drive mechanisms which are completely same to ensure that the system can rotate stably and continuously, and the transmission mode can adopt pin wheel + pin tooth chain transmission mode, the pin tooth chain is installed outside the rotary frame (namely the rotary track) of the dryer, the rotary frame is greatly deformed due to thermal expansion under the influence of drying hot air, so the main transmission gear set adopts flexible long-distance compensation installation mode, which can adapt to the deformation of the rotary frame, ensure the synchronous action of the two drives, and complete the rotary action of the equipment (the rotary mode can also refer to the existing ring cooler, and other existing modes capable of meeting the rotary function can be used in the scheme).

[0024] In the utility model, the ring dryer can select the diameter of the equipment, the width of the trolley and the drying area according to the output and drying time, and has smaller occupied area compared with other types of drying equipment. The drying hot air temperature is controllable, the air duct can be divided into multiple sections in the whole drying range, each section is provided with an air inlet branch with an independent electric flow regulating valve, the number of air inlets is adjusted according to the moisture content of the lump ore raw material, the drying effect is effectively controlled, the lump ore can be prevented from being excessively heated and dried to burst and produce more powder ore.

[0025] In the utility model, the material distributing mechanism adopts special bucket shape, effectively prevents material sticking and blocking. The material distributing mechanism comprises upper bin and lower bin, the upper bin is provided with conical distributor (i.e. distributing cone) to make material evenly fall into the lower bin, and the lower bin evenly distributes material on the trolley. By setting adjustable movable valve plate at the outlet of the lower bin, the material in the bin interacts with the gate plate after accumulation to control the thickness of the material layer on the trolley and interlock with the process requirement.

[0026] Further, since the belt feeder has fluctuation and the requirement of adjusting the material thickness, the lower bin needs to have certain volume, and the lower trolley has small size, so the overall structure of the lower bin is large at the top and small at the bottom. Since the lump ore has high water content, high powder content and large viscosity, the side walls of the bucket body of the lower bin should reduce bending and cancel the stacking plate, and the front side wall and the rear side wall of the lower bin are designed as inclined side walls, and the other two side walls of the lower bin are designed as vertical side walls, which can effectively avoid material sticking and blocking caused by powder ore accumulation. In addition, stainless steel lining plates can also be laid on the inner wall of the lower bin, which can further reduce material sticking while ensuring wear resistance. In addition, a material level detection device can be arranged in the lower bin at the bottom of the distributing cone to detect the material level in the lower bin in real time, avoid the situation that the material level is too low to meet the adjustment of the material thickness, the material surface is not flat, and the material level is too high to increase the risk of blocking, and the material level detection is installed at this position to avoid material flow interference and ensure the accuracy of detection.

[0027] In the utility model, the bottom grate of the trolley adopts a flexible structure design, that is, the flexible grate bars constituting the plate surface of the flexible grate bearing body are metal chain structures. Compared with the existing louver structure grate, the chain holes of the flexible grate bars of the chain structure are more suitable for the particle size of the furnace charging lump ore, and the chain surface is smooth and does not form a connected plane, so it is difficult to accumulate dust. Further, since the metal rings constituting the chain are in a relative movable connection relationship, even if there is a small amount of dust accumulation on the surface, the small amount of dust accumulation can be easily cleaned through the vibration of the chain with the trolley, the collision and friction between the chain and the chain, the collision and friction between the metal rings in the chain, and other actions during the operation and unloading of the trolley, thereby effectively maintaining the permeability of the flexible grate bar through holes and ensuring the air passing area of the grate, reducing the resistance of the drying air passing through the grate, greatly improving the drying effect and reducing the energy consumption of the dryer. That is, the phase of the trolley changes cyclically during the working process, and the flexible grate turns over with the trolley body by more than 90 degrees in the unloading area, and the flexible grate can automatically clean the material during the turning process. It should be noted that the flexible grate works with the dryer trolley grate vibrator to achieve better cleaning effect.

[0028] It should be noted that the ring hole aperture of the metal ring of the flexible grate and the gap between the flexible grates are not greater than the minimum particle size of the block ore to be dried, and the deformation amount of the flexible grate after being installed in the middle opening of the grate frame also needs to meet the condition that the block ore with the minimum particle size is not scattered. Whether it is the ring hole aperture of the metal ring or the gap between the flexible grates or the deformation amount thereof can be reasonably selected and adjusted according to the actual working condition.

[0029] In the utility model, support strips are further arranged in the middle opening of the grate frame, and the support strips are located below the flexible grates and vertically or crosswise contact the flexible grates. The deformation amount of the flexible grates can be effectively controlled through the support strips. Further, positioning rings or tubes are further arranged on the support strips at positions corresponding to each flexible grate. Each flexible grate needs to pass through the corresponding positioning ring or tube. Through the design of the positioning ring or tube, the displacement of the flexible grate in the axial direction of the support strip can be effectively prevented, thereby being beneficial to preventing material leakage.

[0030] In the utility model, in one preferred real-time scheme, the flexible grates include long-chain grates and short-chain grates, and the long-chain grates and the short-chain grates are arranged in a long-short-long or short-long-short manner in the middle opening of the grate frame. Since the flexible grates are composed of a plurality of metal rings (generally elliptical rings) connected in sequence, the shape of each metal ring along the length of the flexible grate is alternately horizontal (i.e., the ring hole is connected in the up-down direction) and vertical (i.e., the ring hole is connected in the horizontal direction perpendicular to the up-down direction). That is, on the same flexible grate, there is a certain "notch" area between any two adjacent horizontal metal rings, and there is a certain "protrusion" area between any two adjacent vertical metal rings. The utility model adopts the long-short-long or short-long-short manner to stagger two adjacent flexible grates, so that the "notch" and "protrusion" areas of the two flexible grates are complementary, which can effectively prevent material leakage while ensuring the air passing area.

[0031] In the utility model, in order to adapt to the working condition of drying hot air about 300 DEG C, three layer composite dry seal (namely composite sealing mechanism) is used between the lower air baffle and the rotary track, the part in contact with the inside hot air is sealed aluminum plate (namely inside aluminum plate layer), the outside is mechanical spring seal (namely outside elastic sealing layer), and aluminum silicate insulation cotton (namely middle aluminum silicate insulation cotton layer) is filled between the two seals.The relative hardness of aluminum plate layer is low and toughness is high, it is arranged in the most inside and directly contacted with hot air, can adapt to the unevenness of the bottom surface of the trolley walking frame beam (generally rotary frame, namely the track beam for trolley walking), can also adapt to 300 DEG C environmental temperature, and has long service life and certain heat insulation performance.The insulation cotton layer is aluminum silicate insulation cotton, and is arranged on the outside of the aluminum plate layer, by setting and aluminum silicate insulation cotton layer, the heat loss inside can be effectively reduced, and the sealing effect is further improved.The elastic sealing layer (for example, polytetrafluoroethylene layer wrapped with spring) is further arranged on the outside of the insulation cotton layer, after the double heat insulation sealing effect of the metal plate layer and the insulation cotton layer, the temperature of the outermost side is significantly reduced, at this time, the elastic sealing layer with better sealing performance is further adopted, the air tightness effect of the sealing mechanism can be significantly improved, and the elastic sealing layer is not affected by high temperature, has the characteristics of long-term high air tightness.The composite sealing mechanism can work stably and reliably for a long time compared with common water seal (water can be quickly evaporated by hot air, and cannot adapt to hot air working condition) and rubber seal (rubber cannot be used in the environment of 260 DEG C and above for a long time, and cannot adapt to hot air working condition), effectively reduces the air leakage rate, improves the drying effect, and further reduces the energy consumption of the dryer fan.

[0032] In the utility model, in order to improve the utilization rate of drying hot air, the insulation layer is added to the outside of each component before the hot air acts on the material, including the fan, the air pipe, the air box and the air baffle, and some reduce heat loss and reduce energy consumption.

[0033] In the utility model, the part track body of the rotary track located in the unloading section is formed into a curved track section (for example, a curved track in the shape of a trapezoid or an arc) by being protruded upwards, and a first position detection switch and a second position detection switch are further respectively arranged at the upstream and downstream of the curved track section, the trolley body is slowly turned along with the trolley shaft under the gravity eccentricity of the trolley body and the material under the dragging of the rocker arm, and the lump ore is unloaded into the unloading groove. After the trolley is unloaded, the trolley body continues to move forward and starts to reset under the assistance of the reset wheel (located below the curved track section), and when the rocker arm wheel of the trolley starts to slowly descend along the curved track, the trolley is forced to rotate reversely until it is reset and enters the next working cycle. In the process of contact and separation between the trolley body and the reset wheel, when the trolley passes through the first position detection switch (at this time, the trolley body is about to contact or has just contacted the reset wheel), the first position detection switch feeds back a signal to the vibration motor so that the vibration motor starts to work, and when the trolley passes through the second position detection switch (at this time, the trolley body is about to separate or has just separated from the reset wheel), the second position detection switch feeds back a signal to the vibration motor so that the vibration motor stops working. That is to say, through the coordinated action of the upstream and downstream detection switches of the curved track section and the reset and vibration mechanism, the automatic cleaning of the residual material on the trolley body can be realized. It needs to be further explained that in order to improve the service life of the reset wheel, the surface of the reset wheel can be coated with a wear-resistant layer.

[0034] It needs to be explained that in order to better realize the turning and resetting actions of the trolley body, the height of the upward protrusion of the curved track section and the span of the curved track section in the horizontal direction (i.e. the running direction of the trolley) both have certain requirements, that is, the area contained by the lower side of the curved track section needs to meet the space for the trolley to complete the turning and resetting. In a preferred embodiment, the height of the upward protrusion of the curved track section and the span of the curved track section in the running direction of the trolley can enable the trolley body to be turned and reset by 60-100° (preferably 75-90°) under the dragging of the rocker arm after passing through the curved track section. It needs to be explained that if the space reserved on the lower side of the curved track section is too large, the space is wasted, and the site occupation and equipment investment cost are both increased, and if the reserved space is too small, the trolley cannot be smoothly turned to complete the unloading, and the cleaning is not thorough, which affects the subsequent drying.

[0035] Further, in order to better realize the cleaning of the residual material in the vehicle body, the position of the resetting and jolting mechanism in space is also strictly required. Among them: in the horizontal direction of the trolley running, the horizontal position of the resetting wheel makes the angle between the vehicle body and the horizontal direction not less than 70° (preferably 80-90°) when the vehicle body just contacts the resetting wheel; that is, the vehicle body needs to be at a large inclination angle when the vehicle body starts to contact the resetting wheel, so that the material shaken off can roll out of the vehicle body under the action of its own gravity after the resetting wheel transmits vibration to the vehicle body. In the vertical direction, the vertical height of the resetting wheel makes the angle between the vehicle body and the horizontal direction not more than 10° (preferably not more than 5°) when the vehicle body is about to separate from the resetting wheel; that is, the vehicle body needs to be in a state close to horizontal when the vehicle body starts to separate from the resetting wheel, so as to facilitate the resetting of the trolley.

[0036] In the utility model, the resetting wheel and the jolting device in the trolley resetting and jolting mechanism can be integrated, or can be independent individuals arranged side by side, as long as they can realize jolting during the resetting of the trolley.

[0037] Compared with the prior art, the utility model has the beneficial technical effects as follows:

[0038] 1: The lump ore ring dryer of the utility model can adapt to the characteristics of high-moisture lump ore and easy blocking, can meet the medium-temperature drying working condition of about 300 DEG C wind temperature, realizes large processing capacity, and the equipment operation is reliable and the drying effect is controllable.

[0039] 2: The lump ore ring dryer of the utility model does not stick to material, does not block material and uniformly distributes material, the material thickness can be adjusted according to the change of actual working condition, and the adaptability is strong.

[0040] 3: The lump ore ring dryer of the utility model also has the advantages of high production efficiency, low investment and maintenance cost, uniform drying effect, strong practicability and suitability for popularization and application. DRAWINGS

[0041] Figure 1 It is an expanded structure schematic view of the ring dryer of the utility model.

[0042] Figure 2 It is a top view structure schematic view of the ring dryer of the utility model.

[0043] Figure 3 It is a transverse sectional view of the ring dryer of the utility model.

[0044] Figure 4 It is an enlarged schematic view of the curved track section area of the utility model.

[0045] Figure 5 It is the structure schematic view of the trolley reset and jarring mechanism of the utility model.

[0046] Figure 6 It is the structure schematic view of the flexible grate plate of the utility model trolley.

[0047] Figure 7 It is the structure schematic view of the composite sealing mechanism of the utility model.

[0048] Figure 8 It is the structure schematic view of the cloth mechanism of the utility model.

[0049] The figure mark: 1: frame;2: rotary track;201: curved track section;202: first position detection switch;203: second position detection switch;3: trolley;301: grate frame;302: flexible grate strip;303: support strip;4: upper wind cover;5: lower wind cover;6: hot air mechanism;601: hot air supply fan;602: hot air supply main pipe;603: hot air supply branch pipe;7: cloth mechanism;701: upper bin;702: lower bin;703: distribution cone;704: movable valve;705: access door;8: unloading mechanism;9: trolley reset and jarring mechanism;901: reset wheel;902: jarring device;903: support;904: shock absorbing base;10: composite sealing mechanism;1001: aluminum plate layer;1002: aluminum silicate thermal insulation cotton layer;1003: elastic sealing layer;11: bulk material collecting belt conveyor;12: rotary drive mechanism. DETAILED DESCRIPTION

[0050] The technical scheme of the utility model will be illustrated below, and the scope of the utility model claimed includes but is not limited to the following embodiments.

[0051] A ring dryer for lump ore, the ring dryer comprising a frame 1, a rotary track 2, a trolley 3, an upper wind cover 4, a lower wind cover 5, a hot air mechanism 6, a cloth mechanism 7, an unloading mechanism 8 and a rotary drive mechanism 12. The rotary track 2 is arranged on the frame 1, and the trolley 3 is arranged on the rotary track 2. The upper wind cover 4 is arranged above the rotary track 2 and the trolley 3. The lower wind cover 5 is arranged below the rotary track 2 and the trolley 3. The hot air mechanism 6 and the unloading mechanism 8 are both arranged on the lower wind cover 5. The cloth mechanism 7 is arranged on the upper wind cover 4. The rotary drive mechanism 12 is arranged on one side of the frame 1 and connected with the rotary track 2 and the trolley 3, and the rotary drive mechanism 12 drives the rotary track 2 and the trolley 3 to rotate on the frame 1.

[0052] As preferred, the ring dryer is divided into feeding section, hot air section, transition cooling section and discharging section in sequence along the rotation direction of the trolley 3. A feeding port connected with the feeding mechanism 7 is opened on the upper air hood 4 above the feeding section. A hot air inlet connected with the hot air mechanism 6 is opened on the lower air hood 5 below the hot air section. A discharging port connected with the discharging mechanism 8 is opened on the lower air hood 5 below the discharging section. A dust removal exhaust port is also opened on the upper air hood 4 above the hot air section.

[0053] As preferred, the hot air mechanism 6 comprises a hot air supply fan 601, a hot air supply main pipe 602 and hot air supply branch pipes 603. The hot air supply fan 601 is connected with the air inlet end of the hot air supply main pipe 602. The hot air supply main pipe 602 is connected with the air inlets on the lower air hood 5 through the hot air supply branch pipes 603.

[0054] As preferred, the inside of the lower air hood 5 below the discharging section is divided into multiple air inlet zones, each of which is independently provided with an air inlet, and the hot air supply main pipe 602 is connected with each air inlet through multiple hot air supply branch pipes 603. Preferably, a flow regulating valve is independently arranged on each hot air supply branch pipe 603.

[0055] As preferred, the rail body of the rotation track 2 at the discharging mechanism 8 is upwardly protruded to form a curved track section 201, and a trolley resetting and jolting mechanism 9 is further arranged below the curved track section 201.

[0056] As preferred, the trolley resetting and jolting mechanism 9 comprises a resetting roller 901 and a jolting device 902. The resetting roller 901 is arranged below the curved track section 201 through a support 903. The jolting device 902 is arranged on one side of the support 903 and connected with the support 903. The jolting device 902 synchronously vibrates the resetting roller 901 by vibrating the support 903. Preferably, a damping base 904 is further arranged at the bottom of the support 903. Preferably, the jolting device 902 is one of a vibrating motor, a jolting pendulum and a jolting air hammer.

[0057] As preferred, a first position detection switch 202 and a second position detection switch 203 are further arranged upstream and downstream of the curved track section 201 along the running direction of the trolley 3. When the trolley 3 runs to the first position detection switch 202, the trolley body of the trolley 3 just contacts the resetting roller 901. When the trolley 3 runs to the second position detection switch 203, the trolley body of the trolley 3 just separates from the resetting roller 901.

[0058] As preferred, the bottom grate of the trolley 3 is a flexible grate, which comprises a grate frame 301 and flexible grate bars 302. The grate frame 301 is a frame structure with a middle opening, and the flexible grate bars 302 are metal chains composed of a plurality of metal rings connected in series. A plurality of the flexible grate bars 302 are installed in parallel in the middle opening of the grate frame 301 and cover the middle opening. Preferably, the aperture of the metal rings, the maximum gap between any two adjacent flexible grate bars 302, and the maximum gap between the flexible grate bars 302 at the outer edge and the grate frame 301 are all not greater than the minimum particle size of the block ore to be dried.

[0059] As preferred, a support bar 303 is arranged in the middle opening of the grate frame 301, which is located below the flexible grate bars 302 and vertically or transversely contacts the flexible grate bars 302.

[0060] As preferred, the feeding mechanism 7 comprises an upper hopper 701 and a lower hopper 702. The upper hopper 701 is designed as an inverted funnel with a narrow upper part and a wide lower part, and the lower hopper 702 is designed as a funnel with a wide upper part and a narrow lower part. The upper opening of the lower hopper 702 is connected to the lower opening of the upper hopper 701. A distribution cone 703 is arranged in the upper hopper 701. In the running direction of the trolley 3, the front and rear side walls of the lower hopper 702 are inclined side walls, and the other two side walls of the lower hopper 702 are vertical side walls. Preferably, a vibration motor is arranged on each of the front and rear side walls of the lower hopper 702.

[0061] As preferred, the lower wall of the front side wall of the lower hopper 702 is arranged vertically to form a vertical part. A discharge port is opened at the bottom of the vertical part and an active valve 704 is arranged. A maintenance door 705 is also arranged on the rear side wall of the lower hopper 702.

[0062] As preferred, a composite sealing mechanism 10 is arranged between the lower hood 5 and the rotating track 2. The composite sealing mechanism 10 comprises an inner aluminum plate layer 1001, a middle aluminum silicate insulation cotton layer 1002, and an outer elastic sealing layer 1003. Preferably, the elastic sealing layer 1003 is a polytetrafluoroethylene layer wrapped with springs.

[0063] As preferred, the thickness of the aluminum plate layer 1001 is 5-10 mm, preferably 6-8 mm. The thickness of the aluminum silicate insulation cotton layer 1002 is 120-150 mm, preferably 125-145 mm. The thickness of the elastic sealing layer 1003 is 50-100 mm, preferably 60-90 mm.

[0064] As preferred, the discharging mechanism 8 is a discharging belt.

[0065] As preferred, at least one bulk material collecting belt conveyor 11 is arranged below the lower hood 5.

[0066] Example 1

[0067] like Figures 1-8 As shown, a ring dryer for lump ore includes a frame 1, a rotary track 2, a trolley 3, an upper air hood 4, a lower air hood 5, a hot air mechanism 6, a material distribution mechanism 7, a discharge mechanism 8, and a rotary drive mechanism 12. The rotary track 2 is mounted on the frame 1, and the trolley 3 is mounted on the rotary track 2. The upper air hood 4 covers the rotary track 2 and the trolley 3. The lower air hood 5 covers the air boxes of the rotary track 2 and the trolley 3. The hot air mechanism 6 and the discharge mechanism 8 are both mounted on the lower air hood 5. The material distribution mechanism 7 is mounted on the upper air hood 4. The rotary drive mechanism 12 is located on one side of the frame 1 and connected to the rotary track 2 and the trolley 3, driving the rotary track 2 and the trolley 3 to rotate on the frame 1.

[0068] Example 2

[0069] Repeating Embodiment 1, except that along the rotational direction of the trolley 3, the ring dryer is sequentially divided into a feeding section, a hot air section, a transition cooling section, and a discharge section. A feeding inlet connected to the material distribution mechanism 7 is provided on the upper air hood 4 above the feeding section. An air inlet connected to the hot air mechanism 6 is provided on the lower air hood 5 below the hot air section. A discharge port connected to the discharge mechanism 8 is provided on the lower air hood 5 below the discharge section. A dust removal exhaust port is also provided on the upper air hood 4 above the hot air section.

[0070] Example 3

[0071] The embodiment 2 is repeated, except that the hot air mechanism 6 includes a hot air supply fan 601, a hot air supply main pipe 602, and a hot air supply branch pipe 603. The hot air supply fan 601 is connected to the air inlet of the hot air supply main pipe 602. The hot air supply main pipe 602 is connected to the air inlet on the lower hood 5 through the hot air supply branch pipe 603.

[0072] Example 4

[0073] The embodiment 3 is repeated, except that the interior of the lower air hood 5 located below the unloading section is divided into multiple air inlet zones, each of which has an independent air inlet. The hot air supply main pipe 602 is connected to each air inlet through multiple hot air supply branch pipes 603.

[0074] Example 5

[0075] The same method as Example 4 is used, except that each hot air supply branch pipe 603 is independently equipped with a flow regulating valve.

[0076] Example 6

[0077] The embodiment 5 is repeated, except that the rail body of the rotary track 2 located at the unloading mechanism 8 protrudes upward to form a curved track section 201, and a trolley reset and vibration mechanism 9 is also provided below the curved track section 201.

[0078] Example 7

[0079] The embodiment 6 is repeated, except that the trolley reset and vibration mechanism 9 includes a reset roller 901 and a vibration device 902. The reset roller 901 is mounted below the curved track section 201 via a support 903. The vibration device 902 is mounted on one side of the support 903 and connected to the support 903. The vibration device 902 vibrates the support 903, thereby causing the reset roller 901 to vibrate synchronously. Preferably, a shock-absorbing base 904 is also provided at the bottom of the support 903.

[0080] Example 8

[0081] Repeat Example 7, except that the vibrating device 902 is a vibrating pendulum.

[0082] Example 9

[0083] Repeat Example 7, except that the rapping device 902 is a vibration motor.

[0084] Example 10

[0085] The same principle applies to Embodiment 9, except that along the running direction of the trolley 3, a first position detection switch 202 and a second position detection switch 203 are respectively installed upstream and downstream of the curved track section 201. When the trolley 3 runs to the first position detection switch 202, the body of the trolley 3 just contacts the reset roller 901. When the trolley 3 runs to the second position detection switch 203, the body of the trolley 3 just separates from the reset roller 901.

[0086] Example 11

[0087] The embodiment 10 is repeated, except that the bottom grate of the trolley 3 is a flexible grate, including a grate frame 301 and flexible grate bars 302. The grate frame 301 is a frame structure with an opening in the middle, and the flexible grate bars 302 are metal chains composed of multiple metal rings connected in sequence. Multiple flexible grate bars 302 are laid flat in the middle opening of the grate frame 301 in a parallel manner and fill the middle opening.

[0088] Example 12

[0089] Example 11 is repeated, except that the aperture of the metal ring, the maximum gap between any two adjacent flexible grate bars 302, and the maximum gap between the flexible grate bar 302 at the outer edge and the grate frame 301 are all not greater than the minimum particle size of the ore to be dried.

[0090] Example 13

[0091] Example 12 is repeated, except that a support strip 303 is further arranged in the middle opening of the grate frame 301, which is located below and vertically or crosswise contacts the flexible grate strip 302.

[0092] Example 14

[0093] Example 13 is repeated, except that the cloth mechanism 7 comprises an upper cloth bin 701 and a lower cloth bin 702. The upper cloth bin 701 is designed as an inverted funnel with a narrow upper part and a wide lower part, and the lower cloth bin 702 is designed as a funnel with a wide upper part and a narrow lower part. The upper opening of the lower cloth bin 702 is in communication with the lower opening of the upper cloth bin 701. A cloth distribution cone 703 is arranged in the upper cloth bin 701. In the running direction of the trolley 3, the front and rear side walls of the lower cloth bin 702 are inclined side walls, and the other two side walls of the lower cloth bin 702 are vertical side walls.

[0094] Example 15

[0095] Example 14 is repeated, except that a vibration motor is arranged on each of the front and rear side walls of the lower cloth bin 702.

[0096] Example 16

[0097] Example 15 is repeated, except that a vertical part is formed by vertically arranging the lower wall of the front side wall of the lower cloth bin 702. A discharge port is opened at the bottom of the vertical part and an active valve 704 is arranged at the discharge port. An inspection door 705 is further arranged on the rear side wall of the lower cloth bin 702.

[0098] Example 17

[0099] Example 16 is repeated, except that a composite sealing mechanism 10 is further arranged between the lower hood 5 and the rotary track 2. The composite sealing mechanism 10 comprises an inner aluminum plate layer 1001, a middle aluminum silicate thermal insulation cotton layer 1002, and an outer elastic sealing layer 1003.

[0100] Example 18

[0101] Example 17 is repeated, except that the elastic sealing layer 1003 is a polytetrafluoroethylene layer wrapped with a spring.

[0102] Example 19

[0103] Example 18 is repeated, except that the thickness of the aluminum plate layer 1001 is 7 mm. The thickness of the aluminum silicate thermal insulation cotton layer 1002 is 135 mm. The thickness of the elastic sealing layer 1003 is 60 mm.

[0104] Example 20

[0105] Example 19 is repeated, except that the discharge means 8 is a discharge belt.

[0106] Example 21

[0107] Example 20 is repeated, except that at least one bulk material collecting belt 11 is provided below the lower hood 5.

Claims

1. A ring dryer for lumpy ore, characterized in that: The ring dryer comprises a frame (1), a rotating track (2), a trolley (3), an upper air cover (4), a lower air cover (5), a hot air mechanism (6), a cloth mechanism (7), a discharging mechanism (8) and a rotating driving mechanism (12); the rotating track (2) is arranged on the frame (1), and the trolley (3) is arranged on the rotating track (2); the upper air cover (4) is arranged above the rotating track (2) and the trolley (3); the lower air cover (5) is arranged below the rotating track (2) and the trolley (3); the hot air mechanism (6) and the discharging mechanism (8) are both arranged on the lower air cover (5); the cloth mechanism (7) is arranged on the upper air cover (4); the rotating driving mechanism (12) is arranged on one side of the frame (1) and connected with the rotating track (2) and the trolley (3), and the rotating driving mechanism (12) drives the rotating track (2) and the trolley (3) to rotate on the frame (1).

2. The endless dryer according to claim 1, characterized in that: The ring dryer is sequentially divided into a feeding section, a hot air section, a transition cooling section and a discharging section along the rotating direction of the trolley (3); a feeding port connected with the cloth mechanism (7) is arranged on the upper air cover (4) above the feeding section; an air inlet connected with the hot air mechanism (6) is arranged on the lower air cover (5) below the hot air section; a discharging port connected with the discharging mechanism (8) is arranged on the lower air cover (5) below the discharging section; and a dust removal exhaust port is further arranged on the upper air cover (4) above the hot air section.

3. The endless dryer according to claim 2, characterized in that: The hot air mechanism (6) comprises a hot air fan (601), a hot air main pipe (602) and a hot air branch pipe (603); the hot air fan (601) is connected with the air inlet end of the hot air main pipe (602); and the hot air main pipe (602) is connected with the air inlet on the lower air cover (5) through the hot air branch pipe (603).

4. The endless dryer according to claim 3, characterized in that: The inside of the lower air cover (5) below the discharging section is divided into multiple air inlet areas, each of which is independently provided with an air inlet, and the hot air main pipe (602) is connected with each air inlet through multiple hot air branch pipes (603).

5. The endless dryer according to claim 4, characterized in that: A flow regulating valve is independently arranged on each hot air branch pipe (603).

6. The endless tumble dryer according to any one of claims 1 to 5, characterized in that: The track body of the rotating track (2) at the discharging mechanism (8) is upwardly protruded to form a curved track section (201), and a trolley resetting and jolting mechanism (9) is further arranged below the curved track section (201).

7. The endless tumble dryer according to claim 6, characterized in that: The trolley resetting and jolting mechanism (9) comprises a resetting roller (901) and a jolting device (902); the resetting roller (901) is arranged below the curved track section (201) through a support (903); the jolting device (902) is arranged on one side of the support (903) and connected with the support (903); and the jolting device (902) drives the resetting roller (901) to synchronously vibrate through the vibrating support (903).

8. The endless dryer according to claim 7, characterized in that: A damping support (904) is further arranged at the bottom of the support (903).

9. The endless dryer according to claim 8, characterized in that: The jolting device (902) is one of a vibrating motor, a jolting pendulum and a jolting air hammer.

10. The endless dryer according to claim 7, characterized in that: First position detection switch (202) and second position detection switch (203) are respectively arranged upstream and downstream of the curved track section (201) along the running direction of the trolley (3); when the trolley (3) runs to the first position detection switch (202), the trolley body of the trolley (3) just contacts the reset roller (901); when the trolley (3) runs to the second position detection switch (203), the trolley body of the trolley (3) just separates from the reset roller (901).

11. The endless dryer according to any one of claims 1-5, 7-10, characterized in that: The bottom grate of the trolley (3) is a flexible grate, which comprises a grate frame (301) and flexible grate bars (302); the grate frame (301) is a frame structure with a middle opening, and the flexible grate bars (302) are metal chains composed of a plurality of metal rings connected in series; a plurality of the flexible grate bars (302) are installed in the middle opening of the grate frame (301) in a parallel manner and cover the middle opening.

12. The endless dryer according to claim 6, characterized in that: The bottom grate of the trolley (3) is a flexible grate, which comprises a grate frame (301) and flexible grate bars (302); the grate frame (301) is a frame structure with a middle opening, and the flexible grate bars (302) are metal chains composed of a plurality of metal rings connected in series; a plurality of the flexible grate bars (302) are installed in the middle opening of the grate frame (301) in a parallel manner and cover the middle opening.

13. The endless dryer according to claim 11, characterized in that: The aperture of the metal ring, the maximum gap between any two adjacent flexible grate bars (302), and the maximum gap between the flexible grate bar (302) at the outer edge and the grate frame (301) are all not greater than the minimum particle size of the block ore to be dried.

14. The endless dryer according to claim 12, characterized in that: The aperture of the metal ring, the maximum gap between any two adjacent flexible grate bars (302), and the maximum gap between the flexible grate bar (302) at the outer edge and the grate frame (301) are all not greater than the minimum particle size of the block ore to be dried.

15. The endless tumble dryer according to claim 13 or 14, characterized in that: A support bar (303) is further arranged in the middle opening of the grate frame (301), which is located below the flexible grate bars (302) and vertically or crosswise contacts the flexible grate bars (302).

16. The endless tumble dryer according to any one of claims 1-5, 7-10, 12-14, characterized in that: The material distribution mechanism (7) comprises an upper bin (701) and a lower bin (702); the upper bin (701) is designed as an inverted funnel with a narrow upper part and a wide lower part, and the lower bin (702) is designed as a funnel with a wide upper part and a narrow lower part; the upper opening of the lower bin (702) is connected with the lower opening of the upper bin (701); a material distribution cone (703) is arranged in the upper bin (701); in the running direction of the trolley (3), the front and rear side walls of the lower bin (702) are inclined side walls, and the other two side walls of the lower bin (702) are vertical side walls.

17. The endless dryer according to claim 6, characterized in that: The distributing mechanism (7) comprises an upper bin (701) and a lower bin (702); the upper bin (701) is designed as an inverted funnel with a narrow upper part and a wide lower part, the lower bin (702) is designed as a funnel with a wide upper part and a narrow lower part; the upper opening of the lower bin (702) is communicated with the lower opening of the upper bin (701); a distributing cone (703) is arranged in the upper bin (701); in the running direction of the trolley (3), the front and rear sidewalls of the lower bin (702) are inclined sidewalls, and the other two sidewalls of the lower bin (702) are vertical sidewalls.

18. The endless dryer according to claim 11, characterized in that: The distributing mechanism (7) comprises an upper bin (701) and a lower bin (702); the upper bin (701) is designed as an inverted funnel with a narrow upper part and a wide lower part, the lower bin (702) is designed as a funnel with a wide upper part and a narrow lower part; the upper opening of the lower bin (702) is communicated with the lower opening of the upper bin (701); a distributing cone (703) is arranged in the upper bin (701); in the running direction of the trolley (3), the front and rear sidewalls of the lower bin (702) are inclined sidewalls, and the other two sidewalls of the lower bin (702) are vertical sidewalls.

19. The endless dryer according to claim 16, characterized in that: Vibration motors are arranged on the front and rear sidewalls of the lower bin (702).

20. The endless dryer according to claim 17 or 18, characterized in that: Vibration motors are arranged on the front and rear sidewalls of the lower bin (702).

21. The endless dryer according to claim 16, characterized in that: The lower part of the front sidewall of the lower bin (702) is arranged vertically to form a vertical part; a discharge port is arranged at the bottom of the vertical part and is provided with a movable valve (704); a maintenance door (705) is further arranged on the rear sidewall of the lower bin (702).

22. The endless dryer according to claim 17 or 18, characterized in that: The lower part of the front sidewall of the lower bin (702) is arranged vertically to form a vertical part; a discharge port is arranged at the bottom of the vertical part and is provided with a movable valve (704); a maintenance door (705) is further arranged on the rear sidewall of the lower bin (702).

23. The drum-type drying machine according to any one of claims 1-5, 7-10, 12-14, 17-19, 21, characterized in that: A composite sealing mechanism (10) is further arranged between the lower wind cover (5) and the rotating track (2); the composite sealing mechanism (10) comprises an inner aluminum plate layer (1001), a middle aluminum silicate thermal cotton layer (1002) and an outer elastic sealing layer (1003).

24. The endless dryer according to claim 6, characterized in that: A composite sealing mechanism (10) is further arranged between the lower wind cover (5) and the rotating track (2); the composite sealing mechanism (10) comprises an inner aluminum plate layer (1001), a middle aluminum silicate thermal cotton layer (1002) and an outer elastic sealing layer (1003).

25. The endless dryer according to claim 11, characterized in that: A composite sealing mechanism (10) is further arranged between the lower wind cover (5) and the rotating track (2); the composite sealing mechanism (10) comprises an inner aluminum plate layer (1001), a middle aluminum silicate thermal cotton layer (1002) and an outer elastic sealing layer (1003).

26. The endless dryer according to claim 16, characterized in that: A composite sealing mechanism (10) is further arranged between the lower wind cover (5) and the rotating track (2); the composite sealing mechanism (10) comprises an inner aluminum plate layer (1001), a middle aluminum silicate thermal cotton layer (1002) and an outer elastic sealing layer (1003).

27. The endless dryer according to claim 23, characterized in that: The elastic sealing layer (1003) is a polytetrafluoroethylene layer wrapped with a spring.

28. The endless dryer according to any one of claims 24-26, characterized in that: The elastic sealing layer (1003) is a polytetrafluoroethylene layer wrapped with springs.

29. The endless dryer according to claim 23, characterized in that: The thickness of the aluminum plate layer (1001) is 5-10 mm; the thickness of the aluminum silicate insulation cotton layer (1002) is 120-150 mm; and the thickness of the elastic sealing layer (1003) is 50-100 mm.

30. The endless dryer according to any one of claims 24-26, characterized in that: The thickness of the aluminum plate layer (1001) is 5-10 mm; the thickness of the aluminum silicate insulation cotton layer (1002) is 120-150 mm; and the thickness of the elastic sealing layer (1003) is 50-100 mm.

31. The endless dryer according to claim 29, characterized in that: The thickness of the aluminum plate layer (1001) is 6-8 mm; the thickness of the aluminum silicate insulation cotton layer (1002) is 125-145 mm; and the thickness of the elastic sealing layer (1003) is 60-90 mm.

32. The endless dryer according to claim 30, characterized in that: The thickness of the aluminum plate layer (1001) is 6-8 mm; the thickness of the aluminum silicate insulation cotton layer (1002) is 125-145 mm; and the thickness of the elastic sealing layer (1003) is 60-90 mm.

33. The drum-type dryer according to any one of claims 1-5, 7-10, 12-14, 17-19, 21, 24-27, 29, 31-32, characterized in that: The unloading mechanism (8) is an unloading belt; and / or At least one bulk material collecting belt conveyor (11) is further arranged below the lower wind cover (5).

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