Lump ore and sintered cake mixed drying process and device

Abstract

The invention relates to the technical field of blast furnace ironmaking raw material pretreatment, in particular to a lump ore and sintered cake mixing and drying process and device.The lump ore and sintered cake mixing and drying device comprises a mounting frame, a sintering mechanism and a waste gas treatment mechanism are arranged on the upper surface of the mounting frame, and the sintering mechanism comprises a sintering machine fixedly connected to the upper surface of the mounting frame; a pair of connecting frames is fixedly connected to one side of the mounting frame, and a first driving motor is fixedly connected to one side of each connecting frame. Through arrangement of the sintering mechanism, the crushing mechanism and the annular cooling mechanism, high-temperature sintered cakes produced by the sintering machine are directly mixed with lump ore after being crushed by a single-roller crusher, and the lump ore is uniformly mixed; high-temperature waste heat of a sintered cake is used for providing a core heat source for lump ore drying, heating equipment such as a hot blast stove does not need to be additionally arranged, energy consumption of coal gas combusted by the hot blast stove in a traditional process is thoroughly avoided, and high-temperature mixed flue gas generated in a circular cooler area is collected through a protective cover and then fed into a waste heat boiler through a fourth conveying pipe for heat exchange and power generation. And gradient utilization of sintering waste heat drying and power generation is achieved.

Description

Technical Field

[0001] This invention relates to the field of blast furnace ironmaking raw material pretreatment technology, specifically to a process and apparatus for mixing and drying lump ore and sinter cake. Background Technology

[0002] Iron-bearing lump ore is one of the important raw materials for blast furnace ironmaking. Compared with sinter and pellets, lump ore has advantages such as stable composition, excellent high-temperature performance, and low price. However, due to transportation and storage, lump ore has a high moisture content and a certain amount of powder. If it is directly fed into the blast furnace, it will consume more fuel during combustion, which will not only increase the blast furnace smelting cost but also lead to more carbon emissions.

[0003] The defects and shortcomings of existing technologies are as follows: the dryer consumes a lot of electricity, the hot air furnace requires a large amount of gas, which increases production costs, and the equipment wear and maintenance costs are high. The dryer's rollers, rings and other parts are prone to wear due to long-term high temperature and friction, and need to be replaced frequently, which increases production costs. The equipment costs are also high, with the dryer and hot air furnace being expensive to manufacture. Summary of the Invention

[0004] The purpose of this invention is to provide a mixed drying process and apparatus for lump ore and sintered cake. The aim is to design an integrated solution that uses the high-temperature waste heat of sintered cake as the core heat source to achieve efficient drying of lump ore and recovery of sintered waste heat. By directly mixing and transferring heat between lump ore and high-temperature sintered cake, and with the addition of a waste gas circulation and purification system, the moisture content of the lump ore is reduced, while additional energy consumption is reduced, and equipment investment and maintenance costs are lowered, thus achieving cost reduction, efficiency improvement, and green and low-carbon solutions.

[0005] To achieve the above effects, the technical solution adopted by the present invention is as follows: a lump ore and sintered cake mixed drying process, based on a lump ore and sintered cake mixed drying device, the lump ore and sintered cake mixed drying device includes: a mounting frame, a sintering mechanism and a waste gas treatment mechanism are provided on the upper surface of the mounting frame, the sintering mechanism includes a sintering machine fixedly connected to the upper surface of the mounting frame, a pair of connecting frames are fixedly connected to one side of the mounting frame, a first drive motor is fixedly connected to one side of the connecting frame, two pairs of first rotating shafts are movably connected inside the sintering machine and the connecting frame, a first conveyor belt is drivenly connected to the outer wall of the two pairs of first rotating shafts, and a material funnel is fixedly connected to the lower surface of the sintering machine; The exhaust gas treatment mechanism includes a dust collector fixedly connected to the upper surface of the sintering machine. A first conveying pipe is fixedly connected to one side of the dust collector, an exhaust fan is fixedly connected to one side of the first conveying pipe, and an exhaust pipe is fixedly connected to one side of the exhaust fan.

[0006] Preferably, the output end of the first drive motor is connected to the output end of a first rotating shaft.

[0007] Preferably, the sintering machine is equipped with a crushing mechanism, which includes a second drive motor fixedly connected to one side of the sintering machine, and a single-roll crusher fixedly connected to one side of the second drive motor.

[0008] Preferably, the sintering machine is provided with a feeding mechanism, which includes a first fixed frame fixedly connected to one side of the sintering machine, a third drive motor fixedly connected to one side of the first fixed frame, a pair of third rotating shafts movably connected inside the first fixed frame, and a plate feed belt drivingly connected to the outer wall of the third rotating shafts.

[0009] Preferably, the output end of the third drive motor is connected to the output end of a third rotating shaft.

[0010] Preferably, a feeding mechanism is provided on one side of the first fixed frame. The feeding mechanism includes a second fixed frame fixedly connected to one side of the first fixed frame, a fourth drive motor fixedly connected to one side of the second fixed frame, a pair of fourth rotating shafts movably connected inside the second fixed frame, a drag-type belt scale being driven connected to the outer wall of the fourth rotating shafts, a third fixed frame fixedly connected to one side of the second fixed frame, a pair of reinforcing rods fixedly connected to one side of the pair of reinforcing rods, a connecting plate fixedly connected to one side of the connecting plate, a fifth drive motor fixedly connected to one side of the connecting plate, a pair of fifth rotating shafts movably connected inside the connecting plate, and a belt conveyor being driven connected to the outer wall of the pair of fifth rotating shafts.

[0011] Preferably, the output end of the fourth rotating shaft is connected to the output end of the fourth drive motor, and the output end of the fifth drive motor is connected to the output end of a fifth rotating shaft.

[0012] Preferably, a temporary storage mechanism is provided on one side of the third fixed frame. The temporary storage mechanism includes a feeding box fixedly connected to one side of the third fixed frame, an air pump fixedly connected to one side of the feeding box, an air rod fixedly connected to one side of the air pump, a closing gate fixedly connected to one side of the air rod, a first servo motor fixedly connected to one side of the third fixed frame, a first rotating shaft fixedly connected to one side of the first servo motor, and a plurality of stirring rods fixedly connected to the outer wall of the first rotating shaft.

[0013] Preferably, the mounting frame is provided with an annular cooling mechanism, which includes an annular cooler fixedly connected to one side of the mounting frame, a circulating fan fixedly connected to one side of the annular cooler, a second conveying pipe fixedly connected to one side of the circulating fan, a dryer fixedly connected to one side of the second conveying pipe, a third conveying pipe fixedly connected to one side of the dryer, a waste heat boiler fixedly connected to the upper surface of the annular cooler, a fourth conveying pipe fixedly connected to one side of the waste heat boiler, a protective cover fixedly connected to the upper surface of the annular cooler, a second servo motor fixedly connected to one side of the annular cooler, a pair of second rotating shafts movably connected inside the annular cooler, and a second conveyor belt drivingly connected to the outer wall of the pair of second rotating shafts.

[0014] A process for mixing and drying lump ore and sintered cake includes the following steps: Step 1: The high-temperature sintered cake produced by the sintering machine is conveyed to the tail area of ​​the equipment, where the single-roll crusher driven by the second drive motor crushes the high-temperature sintered cake into small pieces with the required particle size, while generating a large amount of high-temperature dust. Step 2: The lump ore is transported to the feed box for temporary storage via a belt conveyor. The first servo motor in the feed box drives the first rotating shaft and stirring rod to stir and prevent blockage of the lump ore. According to the drying requirements, the air pump is started to drive the air rod to open and close the gate. The lump ore falls onto the plate feed belt. The third drive motor drives the third rotating shaft and the plate feed belt to transport the lump ore to the mixing area at the tail of the sintering machine. It is mixed with the crushed high-temperature small sintered cake to form a mixture. The mixture is then conveyed into the second conveyor belt of the ring cooler. Step 3: During the mixing process, the high-temperature sintering cake heats the lump ore, and the high-temperature water vapor and high-temperature dust generated are mixed to form mixed flue gas. After being collected, the mixed flue gas enters the dust collector for purification to meet the standards, and then is drawn out by the exhaust fan through the first transport pipe to the exhaust stack for discharge. Step 4: After the mixture is placed on the second conveyor belt of the annular cooler, the high-temperature sintering cake continues to heat the ore and generate high-temperature water vapor. Meanwhile, the circulating fan on one side of the annular cooler blows medium-temperature waste gas into the mixture for cooling. After mixing, high-temperature waste gas with water vapor at a temperature higher than the condensation dew point of water vapor is formed. The flue gas is collected by the protective cover and then enters the waste heat boiler through the fourth transport pipe for heat exchange and power generation. Step 5: To prevent water vapor from accumulating in the exhaust gas, the medium-temperature exhaust gas discharged from the waste heat boiler first enters the dryer through the second transport pipe to absorb water vapor. The dehydrated exhaust gas is then led back to the circulating cooler by the circulating fan through the third transport pipe for recycling. The desiccant in the dryer can be replaced according to the usage to ensure the water vapor removal effect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up a sintering mechanism, a crushing mechanism, and an annular cooling mechanism, the high-temperature sintered cake produced by the sintering machine is crushed by a single-roll crusher and then directly mixed with the lump ore. The high-temperature waste heat of the sintered cake provides the core heat source for drying the lump ore, eliminating the need for additional heating equipment such as hot blast stoves. This completely avoids the energy consumption of burning coal gas in the hot blast stove in the traditional process. The high-temperature mixed flue gas generated in the annular cooling area is collected by a protective cover and sent to the waste heat boiler for heat exchange and power generation through the fourth transport pipe, enabling the cascade utilization of sintering waste heat for drying and power generation.

[0016] Through the setup of the feeding mechanism, loading mechanism, and temporary storage mechanism, the closing gate of the feeding box is controlled by a pneumatic pump-driven air rod switch. In conjunction with the frequency conversion adjustment of the conveyor speed of the plate feeder belt by the third drive motor, the lump ore and sintered cake can be mixed. The speed of the belt conveyor and the plate feeder belt is controlled by the coordinated control of the fifth drive motor and the third drive motor to ensure a continuous and uniform supply of lump ore. The fourth drive motor drives the fourth rotating shaft to rotate, thereby driving the drag-type belt scale to receive the lump ore falling from the temporary storage mechanism and accurately measure the flow rate of lump ore in real time. Furthermore, the running speed of the second conveyor belt of the annular cooler is adjusted by the second servo motor, which can control the residence time of the mixture in the annular cooler, so that the moisture content of the lump ore is stably reduced, thereby avoiding the incomplete drying caused by uneven hot air distribution in traditional dryers.

[0017] With the setup of the exhaust gas treatment mechanism and the ring cooling mechanism, the mixed flue gas generated during the mixing process is purified by the dust collector and then sent to the exhaust stack by the exhaust fan through the first conveying pipe. The fine particulate matter emission concentration meets the emission requirements. Moreover, the exhaust gas in the ring cooling machine area is heat exchanged by the waste heat boiler and then enters the dryer through the second conveying pipe to absorb water vapor. The dehydrated medium-temperature exhaust gas is then led back to the ring cooling machine for recycling by the circulating fan through the third conveying pipe, thereby avoiding equipment corrosion caused by water vapor accumulation. The first drive motor drives the first rotating shaft to drive the first conveyor belt, while the third drive motor drives the third rotating shaft to drive the plate feed belt. Furthermore, the stirring rod of the temporary storage mechanism is made of wear-resistant alloy material, which can be adapted to lump ore of different particle sizes and effectively prevents clogging. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the feeding mechanism, loading mechanism and temporary storage mechanism in an embodiment of the present invention; Figure 3 This is a schematic diagram of a portion of the temporary storage mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of a portion of the temporary storage mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram of the ring cooling mechanism structure according to an embodiment of the present invention.

[0020] In the diagram, 1. Mounting frame; 2. Sintering machine; 3. Connecting frame; 4. First drive motor; 5. First rotating shaft; 6. First conveyor belt; 7. Dust collector; 8. First transport pipe; 9. Exhaust fan; 10. Exhaust stack; 11. Second drive motor; 12. Single roll crusher; 13. First fixed frame; 14. Third drive motor; 15. Third rotating shaft; 16. Plate feed belt; 17. Second fixed frame; 18. Fourth drive motor; 19. Fourth rotating shaft; 20. Carrying belt scale; 21. Third fixed frame; 22. Reinforcing rod; 2 3. Connecting plate; 24. Fifth drive motor; 25. Fifth rotating shaft; 26. Belt conveyor; 27. Feed box; 28. Air pump; 29. ​​Air rod; 30. Closing gate; 31. First servo motor; 32. First rotating shaft; 33. Stirring rod; 34. Material hopper; 35. Circulating cooler; 36. Circulating fan; 37. Second conveying pipe; 38. Dryer; 39. Third conveying pipe; 40. Waste heat boiler; 41. Fourth conveying pipe; 42. Protective cover; 43. Second servo motor; 44. Second rotating shaft; 45. Second conveyor belt. Detailed Implementation

[0021] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: Please see Figures 1 to 5 As shown, this embodiment discloses a lump ore and sintered cake mixed drying device, which is based on the lump ore and sintered cake mixed drying device, including: a mounting frame 1, a sintering mechanism and a waste gas treatment mechanism are provided on the upper surface of the mounting frame 1, the sintering mechanism includes the mounting frame 1, a sintering machine 2, a connecting frame 3, a first drive motor 4, a first rotating shaft 5, a first conveyor belt 6 and a material funnel 34, the sintering machine 2 is fixedly connected to the upper surface of the mounting frame 1, a pair of connecting frames 3 are fixedly connected to one side of the mounting frame 1, the first drive motor 4 is fixedly connected to one side of the connecting frame 3, two pairs of first rotating shafts 5 are movably connected inside the sintering machine 2 and the connecting frame 3, the first conveyor belt 6 is drivenly connected to the outer wall of the two pairs of first rotating shafts 5, the material funnel 34 is fixedly connected to the lower surface of the sintering machine 2, and the output end of the first drive motor 4 is connected to the output end of one of the first rotating shafts 5. In a preferred embodiment of the present invention, after the sintering machine 2 completes the production of high-temperature sintered cake, it transports the sintered cake to the tail end. Before the transport, the first drive motor 4 is started, and the first drive motor 4 drives the first rotating shaft 5 to rotate. The first rotating shaft 5 will drive the first conveyor belt 6 to run in a cycle, and smoothly transport the high-temperature sintered cake produced by the sintering machine 2 to the inside of the material funnel 34.

[0023] The exhaust gas treatment mechanism includes a dust collector 7, a first conveying pipe 8, an exhaust fan 9, and an exhaust stack 10. The dust collector 7 is fixedly connected to the upper surface of the sintering machine 2. The first conveying pipe 8 is fixedly connected to one side of the dust collector 7. The exhaust fan 9 is fixedly connected to one side of the first conveying pipe 8. The exhaust stack 10 is fixedly connected to one side of the exhaust fan 9. In a preferred embodiment of the present invention, after the exhaust fan 9 is started, the negative pressure generated acts on the dust collector 7 through the first transport pipe 8, driving the mixed flue gas to quickly enter the dust collector 7. The dust collector 7 can efficiently intercept dust particles in the flue gas to ensure that the flue gas purification meets the standards. The purified clean flue gas enters the exhaust fan 9 through the first transport pipe 8 and is discharged at high altitude through the exhaust pipe 10 under the power of the fan.

[0024] The sintering machine 2 is equipped with a crushing mechanism, which includes a second drive motor 11 and a single roll crusher 12. The second drive motor 11 is fixedly connected to one side of the sintering machine 2, and the single roll crusher 12 is fixedly connected to one side of the second drive motor 11. In a preferred embodiment of the present invention, when the first conveyor belt 6 of the sintering mechanism transports the high-temperature sintering cake to the crushing area at the tail of the sintering machine 2, the crushing chamber of the single-roll crusher 12 is precisely aligned with the sintering cake conveying path. After the second drive motor 11 is started, the second drive motor 11 drives the roller of the single-roll crusher 12 to rotate at high speed, thereby squeezing and shearing the high-temperature sintering cake.

[0025] The sintering machine 2 is equipped with a feeding mechanism, which includes a first fixed frame 13, a third drive motor 14, a third rotating shaft 15, and a plate feed belt 16. The first fixed frame 13 is fixedly connected to one side of the sintering machine 2, and the third drive motor 14 is fixedly connected to one side of the first fixed frame 13. A pair of third rotating shafts 15 are movably connected inside the first fixed frame 13. The plate feed belt 16 is drivenly connected to the outer wall of the third rotating shaft 15. The output end of one side of the third drive motor 14 is connected to the output end of one of the third rotating shafts 15. In a preferred embodiment of the present invention, when the ore block of the temporary storage mechanism falls onto the plate feed belt 16, the output end of the third drive motor 14 is connected to the third rotating shaft 15, thereby driving the plate feed belt 16 to run in a cycle, thereby mixing the ore block with the crushed sintered cake.

[0026] A feeding mechanism is provided on one side of the first fixed frame 13. The feeding mechanism includes a second fixed frame 17 fixedly connected to one side of the first fixed frame 13. A fourth drive motor 18 is fixedly connected to one side of the second fixed frame 17. A pair of fourth rotating shafts 19 are movably connected inside the second fixed frame 17. A drag-type belt scale 20 is drivenly connected to the outer wall of the fourth rotating shafts 19. A third fixed frame 21 is fixedly connected to one side of the second fixed frame 17. A pair of reinforcing rods 22 are fixedly connected to one side of the third fixed frame 21. A connecting plate 23 is fixedly connected to one side of the pair of reinforcing rods 22. A fifth drive motor 24 is fixedly connected to one side of the connecting plate 23. A pair of fifth rotating shafts 25 are movably connected inside the connecting plate 23. A belt conveyor 26 is drivenly connected to the outer wall of the pair of fifth rotating shafts 25. The output end of the fourth rotating shaft 19 is connected to the output end of the fourth drive motor 18. The output end of the fifth drive motor 24 is connected to the output end of one of the fifth rotating shafts 25. In a preferred embodiment of the present invention, after the fifth drive motor 24 is started, the output end drives the fifth rotating shaft 25 to rotate, thereby driving the belt conveyor 26 to run in a cycle, smoothly conveying the ore falling from the temporary storage mechanism to the plate feed belt 16 of the feeding mechanism. The fourth drive motor 18 drives the fourth rotating shaft 19 to rotate, thereby driving the drag-type belt scale 20 to receive the ore falling from the temporary storage mechanism and accurately measure the ore flow rate in real time.

[0027] A temporary storage mechanism is provided on one side of the third fixed frame 21. The temporary storage mechanism includes a feeding box 27, an air pump 28, an air rod 29, a closing gate 30, a first servo motor 31, a first rotating shaft 32, and stirring rods 33. The feeding box 27 is fixedly connected to one side of the third fixed frame 21. The air pump 28 is fixedly connected to one side of the feeding box 27. The air rod 29 is fixedly connected to one side of the air pump 28. The closing gate 30 is fixedly connected to one side of the air rod 29. The first servo motor 31 is fixedly connected to one side of the third fixed frame 21. The first rotating shaft 32 is fixedly connected to one side of the first servo motor 31. Several stirring rods 33 are fixedly connected to the outer wall of the first rotating shaft 32. In a preferred embodiment of the present invention, after the lump ore enters the feed box 27, the first servo motor 31 is started to drive the first rotating shaft 32 to rotate at a constant speed. The first rotating shaft 32 drives several stirring rods 33 to rotate, effectively breaking up the bridging and clumping phenomenon caused by the high moisture content of the lump ore, and avoiding blockage of the discharge port of the feed box 27. When lump ore is needed, the air pump 28 is started according to the feeding requirements. The air pump 28 drives the extension and retraction stroke of the air rod 29, thereby adjusting the opening degree of the closed gate 30. When feeding is not needed, the air pump 28 works in reverse to drive the air rod 29 to reset, and the closed gate 30 tightly fits the feed port of the feed box 27.

[0028] The mounting frame 1 is equipped with a cooling mechanism, which includes a cooling machine 35, a circulating fan 36, a second conveyor pipe 37, a dryer 38, a third conveyor pipe 39, a waste heat boiler 40, a fourth conveyor pipe 41, a protective cover 42, a second servo motor 43, a second rotating shaft 44, and a second conveyor belt 45. The cooling machine 35 is fixedly connected to one side of the mounting frame 1, the circulating fan 36 is fixedly connected to one side of the cooling machine 35, and the second conveyor pipe 37 is fixedly connected to one side of the circulating fan 36. A dryer 38 is fixedly connected to one side of the device, a third transport pipe 39 is fixedly connected to one side of the dryer 38, a waste heat boiler 40 is fixedly connected to the upper surface of the ring cooler 35, a fourth transport pipe 41 is fixedly connected to one side of the waste heat boiler 40, a protective cover 42 is fixedly connected to the upper surface of the ring cooler 35, a second servo motor 43 is fixedly connected to one side of the ring cooler 35, a pair of second rotating shafts 44 are movably connected inside the ring cooler 35, and a second conveyor belt 45 is drivenly connected to the outer wall of the pair of second rotating shafts 44. In a preferred embodiment of the present invention, the mixture of lump ore and small sintered cake after mixing at the tail end of the sintering machine 2 falls onto the second conveyor belt 45 inside the annular cooler 35. The second servo motor 43 drives the second rotating shaft 44 to drive the second conveyor belt 45 to run at a uniform speed, smoothly conveying the mixture to the high-temperature section of the annular cooler 35. The protective cover 42 efficiently collects the mixed flue gas generated in the high-temperature section and introduces it into the waste heat boiler 40 through the fourth transport pipe 41. The flue gas exchanges heat with the heat exchange medium in the boiler. The second transport pipe 37 sends it into the dryer 38, where the water vapor carried in the waste gas is adsorbed by the internal desiccant. The dehydrated waste gas is then drawn back into the annular cooler 35 by the circulating fan 36 through the third transport pipe 39.

[0029] In use, the present invention is as follows: Step 1: The high-temperature sintered cake produced by the sintering machine 2 is conveyed to the tail area of ​​the equipment, and the single roller crusher 12 driven by the second drive motor 11 crushes the high-temperature sintered cake to form small pieces with the required particle size, while generating a large amount of high-temperature smoke and dust. Step 2: The lump ore is transported to the feed box 27 via the belt conveyor 26 for temporary storage. The first servo motor 31 in the feed box 27 drives the first rotating shaft 32 and the stirring rod 33 to stir and prevent blockage of the lump ore. According to the drying requirements, the air pump 28 is started to drive the air rod 29 to open the closing gate 30, and the lump ore falls to the plate feed belt 16. The third drive motor 14 drives the third rotating shaft 15 and the plate feed belt 16 to transport the lump ore to the mixing area at the tail of the sintering machine 2, where it is mixed with the crushed high-temperature small sintered cake to form a mixture. The mixture is then conveyed into the second conveyor belt 45 of the ring cooler 35. Step 3: During the mixing process, the high-temperature sintering cake heats the lump ore, and the high-temperature water vapor and high-temperature dust generated are mixed to form mixed flue gas. After being collected, the mixed flue gas enters the dust collector 7 for purification to meet the standards, and is then drawn by the exhaust fan 9 through the first transport pipe 8 to the exhaust stack 10 for external discharge. Step 4: After the mixture is placed on the second conveyor belt 45 of the annular cooler 35, the high-temperature sintering cake continues to heat the lump ore and generate high-temperature water vapor. Meanwhile, the circulating fan 36 on one side of the annular cooler 35 blows the medium-temperature waste gas into the mixture for cooling. After mixing, a high-temperature waste gas with water vapor mixed with the mixture is formed at a temperature higher than the condensation dew point of water vapor. After the flue gas is collected by the protective cover 42, it enters the waste heat boiler 40 through the fourth transport pipe 41 for heat exchange and power generation. Step 5: To prevent water vapor from accumulating in the exhaust gas, the medium-temperature exhaust gas discharged from the waste heat boiler 40 first enters the dryer 38 through the second transport pipe 37 to absorb water vapor. The dehydrated exhaust gas is then led back to the circulating cooler 35 by the circulating fan 36 through the third transport pipe 39 for recycling. The desiccant in the dryer 38 can be replaced according to the usage to ensure the water vapor removal effect.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A process for mixing and drying lump ore and sintered cake, characterized in that, Includes the following steps: Step 1: The high-temperature sintered cake produced by the sintering machine (2) is transported to the tail area of ​​the equipment. The single roller crusher (12) driven by the second drive motor (11) crushes the high-temperature sintered cake to form small pieces with the required particle size, while generating a large amount of high-temperature dust. Step 2: The lump ore is transported to the feed box (27) via the belt conveyor (26) for temporary storage. The first servo motor (31) in the feed box (27) drives the first rotating shaft (32) and the stirring rod (33) to stir and prevent blockage of the lump ore. According to the drying requirements, the air pump (28) is started to drive the air rod (29) to open the closing gate (30). The lump ore falls to the plate feed belt (16). The third drive motor (14) drives the third rotating shaft (15) and the plate feed belt (16) to transport the lump ore to the mixing area at the tail of the sintering machine (2). It is mixed with the crushed high-temperature small sintered cake to form a mixture. The mixture is then transported to the second conveyor belt (45) of the ring cooler (35). Step 3: During the mixing process, the high-temperature sintering cake heats the lump ore, and the high-temperature water vapor and high-temperature dust mixed to form mixed flue gas, which is collected and enters the dust collector (7) for purification to meet the standards, and then is drawn by the exhaust fan (9) through the first transport pipe (8) to the exhaust stack (10) for external discharge. Step 4: After the mixture is placed on the second conveyor belt (45) of the ring cooler (35), the high-temperature sintering cake continues to heat the ore and generate high-temperature water vapor. Meanwhile, the circulating fan (36) on one side of the ring cooler (35) blows the medium-temperature waste gas into the mixture for cooling. After mixing, a high-temperature waste gas with water vapor mixed with the mixture is formed at a temperature higher than the condensation dew point of water vapor. After the flue gas is collected by the protective cover (42), it enters the waste heat boiler (40) through the fourth transport pipe (41) for heat exchange and power generation. Step 5: To prevent water vapor from accumulating in the waste gas, the medium-temperature waste gas discharged from the waste heat boiler (40) first enters the dryer (38) through the second transport pipe (37) to absorb water vapor. The dehydrated waste gas is then drawn back to the circulating cooler (35) through the third transport pipe (39) by the circulating fan (36) for recycling. The desiccant in the dryer (38) can be replaced according to the usage to ensure the water vapor removal effect.

2. The drying process for mixing lump ore and sintered cake according to claim 1, characterized in that, This is achieved using a lump ore and sintered cake mixed drying device, which includes: a mounting frame (1), on one side of which is a cooling ring mechanism and a sintering mechanism; the cooling ring mechanism includes a cooling ring machine (35) fixedly connected to one side of the mounting frame (1); a circulating fan (36) fixedly connected to one side of the cooling ring machine (35); a second transport pipe (37) fixedly connected to one side of the circulating fan (36); and a dryer (38) fixedly connected to one side of the second transport pipe (37). A third transport pipe (39) is fixedly connected to one side of the ring cooler (35), a waste heat boiler (40) is fixedly connected to the upper surface of the ring cooler (35), a fourth transport pipe (41) is fixedly connected to one side of the waste heat boiler (40), a protective cover (42) is fixedly connected to the upper surface of the ring cooler (35), a second servo motor (43) is fixedly connected to one side of the ring cooler (35), a pair of second rotating shafts (44) are movably connected inside the ring cooler (35), and a second conveyor belt (45) is drivenly connected to the outer wall of the pair of second rotating shafts (44). The sintering mechanism includes a sintering machine (2) fixedly connected to the upper surface of the mounting frame (1). A pair of connecting frames (3) are fixedly connected to one side of the mounting frame (1). A first drive motor (4) is fixedly connected to one side of the connecting frame (3). Two pairs of first rotating shafts (5) are movably connected inside the sintering machine (2) and the connecting frame (3). A first conveyor belt (6) is drivenly connected to the outer wall of the two pairs of first rotating shafts (5). A material funnel (34) is fixedly connected to the lower surface of the sintering machine (2).

3. The drying process for mixing lump ore and sintered cake according to claim 2, characterized in that: The output end of the first drive motor (4) is connected to the output end of a first rotating shaft (5).

4. The drying process for mixing lump ore and sintered cake according to claim 1, characterized in that: The upper surface of the sintering machine (2) is provided with a waste gas treatment mechanism. The waste gas treatment mechanism includes a dust collector (7) fixedly connected to the upper surface of the sintering machine (2). A first transport pipe (8) is fixedly connected to one side of the dust collector (7). A blower (9) is fixedly connected to one side of the first transport pipe (8). An exhaust pipe (10) is fixedly connected to one side of the blower (9).

5. The drying process for mixing lump ore and sintered cake according to claim 2, characterized in that: The sintering machine (2) is equipped with a crushing mechanism inside. The crushing mechanism includes a second drive motor (11) fixedly connected to one side of the sintering machine (2), and a single roller crusher (12) is fixedly connected to one side of the second drive motor (11).

6. The drying process for mixing lump ore and sintered cake according to claim 2, characterized in that: The sintering machine (2) is equipped with a feeding mechanism inside. The feeding mechanism includes a first fixed frame (13) fixedly connected to one side of the sintering machine (2). A third drive motor (14) is fixedly connected to one side of the first fixed frame (13). A pair of third rotating shafts (15) are movably connected inside the first fixed frame (13). A plate feed belt (16) is drivenly connected to the outer wall of the third rotating shaft (15).

7. The drying process for mixing lump ore and sintered cake according to claim 6, characterized in that: The output end of the third drive motor (14) is connected to the output end of a third rotating shaft (15).

8. The drying process for mixing lump ore and sintered cake according to claim 6, characterized in that: A feeding mechanism is provided on one side of the first fixed frame (13). The feeding mechanism includes a second fixed frame (17) fixedly connected to one side of the first fixed frame (13). A fourth drive motor (18) is fixedly connected to one side of the second fixed frame (17). A pair of fourth rotating shafts (19) are movably connected inside the second fixed frame (17). A drag-type belt scale (20) is drivenly connected to the outer wall of the fourth rotating shafts (19). A third fixed frame (21) is fixedly connected to one side of the second fixed frame (17). A pair of reinforcing rods (22) are fixedly connected to one side of the third fixed frame (21). A connecting plate (23) is fixedly connected to one side of the pair of reinforcing rods (22). A fifth drive motor (24) is fixedly connected to one side of the connecting plate (23). A pair of fifth rotating shafts (25) are movably connected inside the connecting plate (23). A belt conveyor (26) is drivenly connected to the outer wall of the pair of fifth rotating shafts (25).

9. The drying process for mixing lump ore and sintered cake according to claim 8, characterized in that: The output end of the fourth rotating shaft (19) is connected to the output end of the fourth drive motor (18), and the output end of the fifth drive motor (24) is connected to the output end of a fifth rotating shaft (25).

10. The drying process for mixing lump ore and sintered cake according to claim 8, characterized in that: A temporary storage mechanism is provided on one side of the third fixed frame (21). The temporary storage mechanism includes a feeding box (27) fixedly connected to one side of the third fixed frame (21). An air pump (28) is fixedly connected to one side of the feeding box (27). An air rod (29) is fixedly connected to one side of the air pump (28). A closing gate (30) is fixedly connected to one side of the air rod (29). A first servo motor (31) is fixedly connected to one side of the third fixed frame (21). A first rotating shaft (32) is fixedly connected to one side of the first servo motor (31). Several stirring rods (33) are fixedly connected to the outer wall of the first rotating shaft (32).

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