A rotary kiln for rapid roasting and heating of lithium ores

Abstract

The application discloses a rotary kiln for rapid roasting and heating of lithium ore, which comprises a kiln body that is inclined to the right and upward, a kiln tail end cover is sleeved on the left end of the kiln body, a burner that burns and sprays fire into the kiln body is fixed on the left end of the kiln tail end cover, a discharge pipe is fixed on the lower side of the kiln tail end cover, a kiln head end cover is sleeved on the right end of the kiln body, and a smoke discharge cylinder that discharges smoke to the right side is fixed on the right end surface of the kiln head end cover. The burner sprays fire into the kiln body to heat, at this time, part of the heat energy generated by the combustion of the burner enters the heating channel and flows to the right end of the inner roller to externally heat, and the heat energy in the inner roller is simultaneously used to internally heat, so that the heating speed of the inner roller on the material is greatly improved. Meanwhile, the flue gas is discharged to the right side through the smoke discharge cylinder, and the waste heat of the flue gas is used to preheat the material in the feeding cylinder, so that the heating time of the material is greatly reduced, and the heating efficiency of the material is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, specifically to a rotary kiln for rapid roasting and heating of lithium ore. Background Technology

[0002] Rotary kilns are widely used in many production industries such as building materials, metallurgy, chemicals, and environmental protection. They are rotary cylindrical equipment used to mechanically, physically, or chemically process solid materials.

[0003] Chinese patent CN103528072A discloses a rotary kiln, including a kiln head, kiln body, kiln tail, tire, support roller, large gear ring, transmission device, and foundation. The support roller is mounted on the foundation via bearings, and the tire passes through and is fixedly connected to the kiln body. The kiln body is mounted on the support roller via the tire. The large gear ring is fixedly mounted on the kiln body, and the transmission device is mounted on the foundation, with its output end meshing with the gear of the large gear ring. A lifting plate is installed in the kiln body, and a kiln head hood is provided on the kiln head. The kiln head is equipped with an activated sludge feeding device and a combustible waste feeding device. The lifting plate is an O-shaped chain, which is installed on the inner wall of the kiln body. The sealing structure between the kiln head and the kiln body is a labyrinth seal and a fish-scale seal. The sealing structure between the kiln tail and the kiln body is a labyrinth seal and a fish-scale seal. A flue gas outlet is provided above the kiln head hood, and a temperature measuring device is provided at the flue gas outlet. The rotary kiln drying process for PTA activated sludge results in complete combustion, good incineration effect, excellent sludge drying efficiency, energy saving, and good sealing performance.

[0004] The rotary kiln described above heats the kiln body by spraying fire into it through a burner installed at the kiln tail. However, the burner can only heat the left end of the kiln body quickly, resulting in a limited heating area. This means that the material inside the kiln cannot be heated evenly over a large area, leading to low heating efficiency. Summary of the Invention

[0005] To address the issue of low heating efficiency of materials within the kiln body in the aforementioned rotary kilns, this application provides a rotary kiln for rapid roasting and heating of lithium ore, employing the following technical solution:

[0006] A rotary kiln for rapid roasting and heating of lithium ore includes a kiln body inclined to the upper right. A kiln tail end cover is fitted to the left end of the kiln body, and a burner for injecting flames into the kiln body is fixed to the left end of the kiln tail end cover. A discharge pipe is fixed to the lower side of the kiln tail end cover. A kiln head end cover is fitted to the right end of the kiln body, and an exhaust pipe for venting smoke to the right is fixed to the right end face of the kiln head end cover. A feeding mechanism is arranged transversely inside the exhaust pipe. The feeding mechanism includes a feeding cylinder, the left end of which extends to the inner side of the right port of the kiln body, and a gap is left between the outer side of the feeding cylinder and the exhaust pipe. The kiln body includes an outer drum, and an inner drum is arranged inside the outer drum. A spiral blade is arranged between the outer surface of the inner drum and the inner surface of the outer drum. The spiral blade, the inner drum, and the outer drum are interconnected to form a spiral heating channel.

[0007] By adopting the above technical solution, the burner injects fire into the kiln body for heating. At this time, part of the heat energy generated by the burner enters the heating channel and flows to the right end of the inner drum for external heating. Together with the heat energy inside the inner drum, it simultaneously heats a large area inside and outside, thereby greatly improving the heating speed of the material by the inner drum. At the same time, the flue gas is discharged to the right through the exhaust stack, and the residual heat of the flue gas is used to preheat the material in the feeding cylinder, thereby greatly reducing the heating time of the material and effectively improving the heating efficiency of the material.

[0008] Optionally, a toothed ring is fixedly fitted at the middle position of the outer side of the outer roller, and the left end of the outer roller is longer than the left end of the inner roller.

[0009] By adopting the above technical solution, the outer roller is driven and connected to the rolling drive seat through the gear ring. The left end of the outer roller is longer than the left end of the inner roller, so that while the burner sprays fire into the inner roller, a portion of the heat energy can be sent into the heating channel.

[0010] Optionally, a smoke exhaust pipe is fixed to the upper side of the smoke exhaust pipe near the right end, and an installation port is provided on the right end face of the smoke exhaust pipe.

[0011] By adopting the above technical solution, the exhaust stack discharges the smoke through the exhaust pipe, thereby achieving smoke exhaust to the right.

[0012] Optionally, multiple transverse heat-conducting fins are fixed on the outer surface of the feeding cylinder, and the multiple heat-conducting fins are arranged radially and evenly. A feed pipe is fixed on the upper side of the end of the feeding cylinder that passes through the mounting port on the right end.

[0013] By adopting the above technical solution, the feeding cylinder can more efficiently conduct heat from the flue gas into the feeding cylinder through the heat-conducting fins to preheat the material.

[0014] Optionally, a transverse spiral blade rod is provided on the inner side of the feeding cylinder, a drive motor is fixed to the right end of the feeding cylinder, and the output shaft of the drive motor is fixedly connected to the spiral blade rod, and a grinding block is fixedly connected to the left end of the spiral blade rod.

[0015] By adopting the above technical solution, the drive motor drives the spiral blade rod to rotate, thereby conveying the material to the left. At the same time, the grinding block rotates under the drive of the spiral blade rod, thereby crushing the larger particles in the material flowing between the grinding block and the inner wall of the feeding cylinder, thus ensuring the roasting quality of the material.

[0016] Optionally, a transmission rod is fixed at the center of the helical blade rod, and a directional plug is fixed at the left end of the transmission rod.

[0017] By adopting the above technical solution, the helical blade rod is connected to the grinding block through the plug at the end of the transmission rod.

[0018] Optionally, a conical head is fixed to the right end of the grinding block, and evenly arranged breaking teeth are fixed to the outer circumferential surface of the grinding block. A slot for engaging with the plug is opened on the right end face of the conical head, and a countersunk hole communicating with the slot is opened on the left end of the grinding block.

[0019] By adopting the above technical solution, the grinding block crushes larger particles in the material through the crushing teeth while rotating, and is connected to the plug through the slot, and then locked and fixed by the screw passing through the countersunk hole.

[0020] Optionally, a rolling drive seat is provided on the lower side of the kiln body, and rolling support seats are provided on both the left and right sides of the rolling drive seat.

[0021] By adopting the above technical solution, the rolling support seat provides rolling support for the kiln body, while the rolling drive seat drives the kiln body to roll.

[0022] Optionally, the rolling support includes an upwardly opening first housing, with support rollers installed on the inner side of the upper port of the first housing near both the front and rear ends.

[0023] By adopting the above technical solution, the kiln body is supported by two front and rear support rollers.

[0024] Optionally, the rolling drive seat includes an upward-opening second housing, with toothed posts installed on the inner side of the upper port of the second housing near both the front and rear ends, and a rotating motor fixedly connected to one end of the toothed post through the side wall of the second housing.

[0025] By adopting the above technical solution, the rotating motor drives the gear column to rotate, and the gear column drives the gear ring to rotate the kiln body.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. In the technical solution of the present invention, the burner injects fire into the kiln body for heating. At this time, part of the heat energy generated by the burner combustion enters the heating channel and flows to the right end of the inner drum for external heating. It works in conjunction with the heat energy inside the inner drum to heat a large area inside and outside at the same time, thereby greatly improving the heating speed of the material by the inner drum. At the same time, the flue gas is discharged to the right through the flue, and the residual heat of the flue gas is used to preheat the material in the feeding cylinder in advance, thereby greatly reducing the heating time of the material and effectively improving the heating efficiency of the material.

[0028] 2. At the same time, the spiral blade rod is driven by the drive motor to rotate, thereby conveying the material to the left. Meanwhile, the grinding block rotates under the drive of the spiral blade rod, thereby crushing the larger particles in the material flowing between the grinding block and the inner wall of the feeding cylinder, thus ensuring the roasting quality of the material. Attached Figure Description

[0029] 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 of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a rotary kiln for rapid roasting and heating of lithium ore according to the present invention.

[0031] Figure 2 This is a schematic diagram of the kiln body for rapid roasting and heating of lithium ore, as shown in this invention.

[0032] Figure 3 This is a schematic diagram of the flue of a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0033] Figure 4 This is a schematic diagram of the feeding mechanism of a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0034] Figure 5 This is a schematic diagram of the spiral blade rod of a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0035] Figure 6 This is a schematic diagram of a grinding block in a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0036] Figure 7 This is a schematic diagram of the rolling support base of a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0037] Figure 8 This is a schematic diagram of the rolling drive seat of a rotary kiln for rapid roasting and heating of lithium ore, as shown in this invention.

[0038] In the diagram: 1. Burner; 2. Kiln tail end cover; 21. Discharge pipe; 3. Rolling support seat; 31. First shell; 32. Support roller; 4. Rolling drive seat; 41. Second shell; 42. Rotary motor; 43. Gear column; 5. Kiln body; 51. Outer drum; 52. Inner drum; 53. Gear ring; 54. Spiral blade; 55. Heating channel; 6. Kiln head end cover; 7. Exhaust pipe; 71. Exhaust pipe; 72. Mounting socket; 8. Feeding mechanism; 81. Grinding block; 811. Crushing tooth; 812. Conical head; 813. Slot; 814. Countersunk hole; 82. Feeding cylinder; 83. Heat-conducting fins; 84. Spiral blade rod; 841. Plug; 842. Transmission rod; 85. Feed pipe; 86. Drive motor. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0040] Reference Figure 1 , Figure 2 and Figure 4As shown, a rotary kiln for rapid roasting and heating of lithium ore includes a kiln body 5 tilted upwards to the right. A kiln tail end cover 2 is fitted to the left end of the kiln body 5, and a burner 1 for injecting flames into the kiln body 5 is fixed to the left end of the kiln tail end cover 2. A discharge pipe 21 is fixed to the lower side of the kiln tail end cover 2. A kiln head end cover 6 is fitted to the right end of the kiln body 5, and an exhaust pipe 7 for venting smoke to the right is fixed to the right end face of the kiln head end cover 6. A feeding mechanism 8 is laterally inserted into the inner side of the exhaust pipe 7. The feeding mechanism 8 includes a feeding cylinder 82, the left end of which extends to the inner side of the right port of the kiln body 5, and a gap is left between the outer side of the feeding cylinder 82 and the exhaust pipe 7. The kiln body 5 includes an outer roller 51, and an inner roller 52 is provided inside the outer roller 51. A spiral blade 54 is provided between the outer surface of the inner drum 52 and the inner surface of the outer drum 51. The spiral blade 54, the inner drum 52 and the outer drum 51 are connected to form a spiral heating channel 55. The burner 1 sprays fire into the kiln body 5 for heating. At this time, part of the heat energy generated by the combustion of the burner 1 enters the heating channel 55 and flows to the right end of the inner drum 52 for external heating. It works in conjunction with the heat energy inside the inner drum 52 to heat a large area inside and outside at the same time, thereby greatly improving the heating speed of the material by the inner drum 52. At the same time, the flue gas is discharged to the right through the flue gas 7, and the residual heat of the flue gas is used to preheat the material in the feeding cylinder 82, thereby greatly reducing the heating time of the material and effectively improving the heating efficiency of the material.

[0041] Reference Figure 2 As shown, a toothed ring 53 is fixedly fitted on the middle position of the outer side of the outer roller 51. The outer roller 51 is driven and connected to the rolling drive seat 4 through the toothed ring 53. The left end of the outer roller 51 is longer than the left end of the inner roller 52. The left end of the outer roller 51 is longer than the left end of the inner roller 52, so that while the burner 1 sprays fire into the inner roller 52, a portion of the heat energy can be sent into the heating channel 55.

[0042] Reference Figure 3 As shown, a smoke exhaust pipe 71 is fixed on the upper side of the smoke exhaust 7 near the right end. The smoke exhaust 7 exhausts the smoke through the smoke exhaust pipe 71 to achieve smoke exhaust to the right. An installation socket 72 is provided on the right end face of the smoke exhaust 7 for installation and cooperation with the feeding cylinder 82.

[0043] Reference Figure 4 As shown, multiple transverse heat-conducting fins 83 are fixed on the outer surface of the feeding cylinder 82. The heat-conducting fins 83 can more efficiently conduct heat from the flue gas into the feeding cylinder 82 to preheat the material. The multiple heat-conducting fins 83 are arranged radially and evenly, thus forming multiple channels between the multiple heat-conducting fins 83 for the flow of flue gas. A feed pipe 85 is fixed on the upper side of the end of the right end of the feeding cylinder 82 that passes through the mounting port 72 for feeding the material into the feeding cylinder 82.

[0044] Reference Figure 4 and Figure 5 As shown, a transverse spiral blade rod 84 is provided on the inner side of the feeding cylinder 82. A transmission rod 842 is fixed at the center of the spiral blade rod 84, and a directional plug 841 is fixed at the left end of the transmission rod 842. The spiral blade rod 84 is connected to the grinding block 81 through the plug 841 at the end of the transmission rod 842. A drive motor 86 is fixed at the right end of the feeding cylinder 82, and the output shaft of the drive motor 86 is fixedly connected to the spiral blade rod 84. The grinding block 81 is fixedly connected to the left end of the spiral blade rod 84. The drive motor 86 drives the spiral blade rod 84 to rotate, thereby conveying the material to the left. At the same time, the grinding block 81 rotates under the drive of the spiral blade rod 84, thereby crushing larger particles in the material flowing between the grinding block 81 and the inner wall of the feeding cylinder 82, thus ensuring the roasting quality of the material.

[0045] Reference Figure 6 As shown, a conical head 812 is fixed to the right end of the grinding block 81 to guide the material flow, causing the material to flow towards the edge of the grinding block 81. The outer circumferential surface of the grinding block 81 is fixed with evenly arranged crushing teeth 811. While the grinding block 81 rotates, it crushes larger particles in the material through the crushing teeth 811. The right end face of the conical head 812 is provided with a slot 813 that mates with the plug 841. The left end of the grinding block 81 is provided with a countersunk hole 814 that communicates with the slot 813. The slot 813 is used to connect with the plug 841, and then the screw passing through the countersunk hole 814 is used to lock and fix it.

[0046] Reference Figure 1 , Figure 7 and Figure 8 As shown, a rolling drive seat 4 is provided on the lower side of the kiln body 5. The rolling drive seat 4 includes a second housing 41 with an upward opening. Toothed columns 43 are installed on the inner side of the upper port of the second housing 41 near the front and rear ends. One end of the center of the toothed column 43 passes through the side wall of the second housing 41 and is fixedly connected to a rotating motor 42. The rotating motor 42 drives the toothed column 43 to rotate, and drives the toothed ring 53 to roll the kiln body 5. Rolling support seats 3 are provided on the left and right sides of the rolling drive seat 4. The rolling support seats 3 include a first housing 31 with an upward opening. Support rollers 32 are installed on the inner side of the upper port of the first housing 31 near the front and rear ends. The kiln body 5 is rolled and supported by the two support rollers 32.

[0047] Working principle: When roasting materials, they are fed into the feeding cylinder 82 through the feed pipe 85. At this time, the drive motor 86 drives the spiral blade rod 84 to rotate and convey the materials to the left. Meanwhile, the grinding block 81 rotates under the drive of the spiral blade rod 84 to crush larger particles in the material flowing between the grinding block 81 and the inner wall of the feeding cylinder 82 and feed them into the inner drum 52. At the same time, the burner 1 continuously sprays flames into the inner drum 52 for heating. At the same time, some of the heat enters the heating channel 55 to heat the inner drum 52 from the outside. The rotating inner drum 52 then heats and roasts the materials. Finally, the materials are discharged through the discharge pipe 21. The hot air flow in the inner drum 52 and the heating channel 55 flows to the flue 7 and is discharged through the flue pipe 71. When the flue flows through the heat-conducting fins 83, it transfers heat to the feeding cylinder 82, thereby completing the preheating of the materials.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A fast roasting heating rotary kiln for lithium ore, comprising a kiln body (5) which is inclined to the right and upwards, characterized in that: The left end of the kiln body (5) is fitted with a kiln tail end cover (2), and a burner (1) for burning and spraying flames into the kiln body (5) is fixed to the left end of the kiln tail end cover (2). A discharge pipe (21) is fixed to the lower side of the kiln tail end cover (2). The right end of the kiln body (5) is fitted with a kiln head end cover (6), and a flue (7) for venting smoke to the right is fixed to the right end face of the kiln head end cover (6). A feeding mechanism (8) is provided transversely inside the flue (7). The feeding mechanism (8) includes a feeding cylinder (82). The left end of the feeding cylinder (82) extends to the inside of the right port of the kiln body (5), and a gap is left between the outer side of the feeding cylinder (82) and the flue (7). The kiln body (5) includes an outer drum (51), an inner drum (52) is provided on the inner side of the outer drum (51), and a spiral blade (54) is provided between the outer surface of the inner drum (52) and the inner surface of the outer drum (51). The spiral blade (54), the inner drum (52) and the outer drum (51) are connected to each other to form a spiral heating channel (55). A transverse spiral blade rod (84) is provided on the inner side of the feeding cylinder (82). A drive motor (86) is fixed at the right end of the feeding cylinder (82), and the output shaft of the drive motor (86) is fixedly connected to the spiral blade rod (84). A grinding block (81) is fixedly connected to the left end of the spiral blade rod (84).

2. A fast calcining heated rotary kiln for lithium ore according to claim 1, characterized in that, A toothed ring (53) is fixedly fitted at the middle position of the outer side of the outer roller (51), and the left end of the outer roller (51) is longer than the left end of the inner roller (52).

3. A fast calcining heated rotary kiln for lithium minerals according to claim 1, characterized in that, The upper side of the exhaust pipe (7) is fixed with an exhaust pipe (71) near the right end, and an installation socket (72) is opened on the right end face of the exhaust pipe (7).

4. A fast calcining heated rotary kiln for lithium minerals according to claim 3, characterized in that, The outer surface of the feeding cylinder (82) is fixed with multiple transverse heat-conducting fins (83), and the multiple heat-conducting fins (83) are arranged radially and evenly. The upper side of the right end of the feeding cylinder (82) through the mounting socket (72) is fixed with a feed pipe (85).

5. A fast calcining heated rotary kiln for lithium minerals according to claim 4, characterized in that, The center of the spiral blade rod (84) is fixed with a transmission rod (842), and the left end of the transmission rod (842) is fixed with a directional plug (841).

6. A fast calcining heated rotary kiln for lithium minerals according to claim 5, characterized in that, The grinding block (81) has a conical head (812) fixed at the right end, and the outer circumferential surface of the grinding block (81) has evenly arranged breaking teeth (811). The right end face of the conical head (812) is provided with a slot (813) that mates with the plug (841). The left end of the grinding block (81) is provided with a countersunk hole (814) that communicates with the slot (813).

7. A fast calcining heated rotary kiln for lithium ore according to claim 1, characterized in that, A rolling drive seat (4) is provided on the lower side of the kiln body (5), and rolling support seats (3) are provided on both the left and right sides of the rolling drive seat (4).

8. A rotary kiln for rapid roasting and heating of lithium ore according to claim 7, characterized in that, The rolling support (3) includes an upward-opening first housing (31), and support rollers (32) are installed on the inner side of the upper port of the first housing (31) near both the front and rear ends.

9. A rotary kiln for rapid roasting and heating of lithium ore according to claim 7, characterized in that, The rolling drive seat (4) includes an upward-opening second housing (41). A toothed column (43) is installed on the inner side of the upper port of the second housing (41) near both the front and rear ends. A rotating motor (42) is fixedly connected to the center of the toothed column (43) through the side wall of the second housing (41).

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