Two-section type roasting equipment

Abstract

Two-section type roasting equipment comprises a placing table, a first rotary kiln and a second rotary kiln are arranged on the upper side of the placing table, a certain height difference exists between the first rotary kiln and the second rotary kiln, a connecting pipe is arranged between the first rotary kiln and the second rotary kiln, the first rotary kiln and the second rotary kiln are both obliquely arranged relative to the placing table, and an independent transmission gear, a wheel belt and a dragging wheel are arranged outside the first rotary kiln. An independent transmission gear, a wheel belt and a tug are arranged outside the second rotary kiln, an elastic baffle is arranged in the middle of the connecting pipe, and a vibration supporting frame is arranged outside the connecting pipe. The first rotary kiln can quickly dry phosphate tailing materials, after the materials enter the second rotary kiln, the high kiln temperature can make the phosphate tailing materials fully heated and react, the baffles at the connecting pipes can prevent the tailing materials from being too light and being blown to the kiln tail by kiln head airflow, and the supporting frame plays a supporting role and also plays a role in drying. And the materials can be conveyed from the first rotary kiln to the second rotary kiln quickly, so that the problem of uniform heating of the rotary kilns is solved, and meanwhile, the problem that mineral powder is easily brought into a dust remover by airflow is solved.

Description

Technical Field

[0001] The present application relates to a roasting device, in particular to a two-stage roasting device, and belongs to the technical field of roasting equipment. Background Art

[0002] During the flotation process of phosphate ore, tailings accounting for nearly 30-45% of the total amount will be discharged to the tailings dam in the form of tailings slurry. The storage of a large amount of floating and washed phosphate tailings not only occupies a large amount of land resources, but also brings serious pollution to the environment and poses huge safety hazards. The flotation phosphate tailings slurry has a large water content, and it is a global problem to develop it for economically valuable resource use. The preparation of soil conditioners by rotary kiln pyrolysis can not only solve the problem of phosphate tailings storage, but also activate the valuable calcium, magnesium and silicon resources in it to provide soil, which is a good soil remediation material. When using a rotary kiln to prepare soil conditioners for phosphate tailings by pyrolysis, due to the high moisture content of phosphate tailings, when passing through a single rotary kiln, the phosphate tailings will agglomerate due to the rapid high temperature, resulting in material waste; the phosphate tailings have a fine particle size and a low density after roasting, and are easily blown to the dust collector at the end of the kiln by the blower, which also causes material waste. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a two-stage roasting equipment to solve the problems raised in the above-mentioned background technology. The first rotary kiln in the utility model can speed up the drying efficiency of relatively wet phosphorus tailings material, and can break up the material to prevent agglomeration; the connecting pipe can make the material enter the second rotary kiln evenly, and the middle baffle can prevent the blower from causing the material to flow back to the first rotary kiln; the temperature of the second rotary kiln is relatively high, so that the inside and outside of the material are heated evenly, fully reacted, and the quality of the roasted product is improved.

[0004] To achieve the above-mentioned purpose, the technical solution of the present application is: a two-stage roasting equipment, including a placing table, characterized in that: a first rotary kiln and a second rotary kiln are installed on the upper side of the placing table, there is a certain height difference between the first rotary kiln and the second rotary kiln, a connecting pipe is connected between the first rotary kiln and the second rotary kiln, the first rotary kiln and the second rotary kiln are arranged at an angle on the placing table, the first rotary kiln and the second rotary kiln are respectively provided with independent transmission gears, wheel belts and tugboats, a baffle is provided inside the connecting pipe, a support frame is provided outside the connecting pipe, and a transmission gear meshing with the independent transmission gear is provided on the placing table.

[0005] Furthermore, the diameter of the first rotary kiln is smaller than that of the second rotary kiln, and the length of the first rotary kiln is greater than that of the second rotary kiln.

[0006] Furthermore, the inner walls of the first rotary kiln and the second rotary kiln are respectively provided with a plurality of staggered protruding plates along the length direction of the rotary kiln.

[0007] Furthermore, the independent transmission gears are respectively located in the middle of the first rotary kiln and the second rotary kiln, and the independent transmission gears are externally embedded gears. Wheel belts are respectively provided at both ends of the first rotary kiln and the second rotary kiln, and each wheel belt corresponds to two tugwheels, which are respectively located on both sides of the rotary kiln.

[0008] Furthermore, the baffle is arranged in the middle position inside the connecting tube, the upper end of the baffle is rotatably connected to the top end of the connecting tube through a movable connecting rod, the bottom end of the baffle is not connected to the connecting tube, the baffle is arranged at 90° to the ground, and a return spring is arranged between the baffle and the top end of the connecting tube to restore the baffle to 90° with the ground.

[0009] Furthermore, a vibration generating device is installed between the support frame and the placement table, and multiple rows of vibration springs are placed inside the support frame.

[0010] Furthermore, fixing buckles are installed between the placement table and the first rotary kiln and the second rotary kiln respectively, temperature sensors are installed on the upper sides of the first rotary kiln and the second rotary kiln, a feed port and an exhaust device are installed on the upper side of the first rotary kiln, and a discharge port and an ignition device are installed on the second rotary kiln.

[0011] The beneficial effects of this application are:

[0012] The present application adopts a two-stage first rotary kiln and a second rotary kiln. The first rotary kiln preheats and mixes the materials, and the second rotary kiln can fully heat the materials.

[0013] The present application installs staggered protruding plates in the first rotary kiln and the second rotary kiln, and the materials can be transported to a high place and dropped by different protruding plates, so that the materials can be fully scattered and turned over, so that the materials are heated more evenly inside and outside.

[0014] The present application installs a rotatable and automatically resettable baffle in the connecting pipe. When the material moves in the connecting pipe, the baffle is in a semi-open state. After the material enters the second rotary kiln, it is greatly affected by the wind force, and the baffle can effectively prevent the material from flowing back.

[0015] 4. The present application has a reasonable structure. A support frame is installed under the connecting pipe. The support frame is composed of a vibration generating device and a spring. It can not only play a supporting role, but also change the material transportation rate when changing the vibration frequency, thereby preventing material accumulation in the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0017] Figure 2 It is a cross-sectional schematic diagram of the present application.

[0018] In the figure: 1. placing table; 2. first rotary kiln; 3. second rotary kiln; 4. connecting pipe; 5. independent transmission gear; 6. wheel belt; 7. tugboat; 8. baffle; 9. support frame; 10. transmission gear; 11. movable connecting rod; 12. reset spring; 13. vibration generating device; 14. multiple rows of vibration springs; 15. fixing buckle; 16. temperature sensor; 17. feed port; 18. exhaust device; 19. discharge port; 20. ignition device; 21. offset protrusion plate. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] See also Figure 1 to Figure 2 A two-stage roasting equipment of the present application includes a placing table 1, a first rotary kiln 2 and a second rotary kiln 3 are installed on the upper side of the placing table 1, the first rotary kiln 2 and the second rotary kiln 3 have a certain height difference and a connecting pipe 4 is installed between them, the first rotary kiln 2 and the second rotary kiln 3 are placed at 15° to the placing table 1, the first rotary kiln 2 and the second rotary kiln 3 are provided with independent transmission gears 5, wheel belts 6, and tugboats 7, a baffle 8 is provided in the connecting pipe 4, a support frame 9 is provided outside the connecting pipe, and a transmission gear 10 is provided in the placing table 1 to mesh with the transmission gear 5.

[0021] In this embodiment, the first rotary kiln 2 has a smaller diameter and a longer length, and the second rotary kiln 3 has a larger diameter and a shorter length. The inner walls of the first rotary kiln 2 and the second rotary kiln 3 are provided with a dislocated protruding plate 21, which is placed parallel to the placement table 1. The transmission gear 5 is located in the middle of the first rotary kiln 2 and the second rotary kiln 3 and is an externally embedded gear. There are 4 wheel belts 6, which are respectively located at the two ends of the first rotary kiln 2 and the second rotary kiln 3. There are 8 tug wheels 7, which are respectively located on both sides of the first rotary kiln 2 and the second rotary kiln 3 and fit with the wheel belt 6.

[0022] The baffle 8 is arranged inside the connecting pipe 4 at the same distance from the first rotary kiln 2 and the second rotary kiln 3. The baffle 8 is connected to the top of the connecting pipe 4 by a movable connecting rod 11. There is a certain distance between the bottom end of the baffle 8 and the connecting pipe 4. It is placed at 90° to the ground and has a reset spring 12 at the connection with the connecting pipe 4. A vibration generating device 13 is installed between the support frame 9 and the placement table. Multiple rows of vibration springs 14 are placed inside the support frame. Fixed buckles 15 are installed between the placement table 1 and the first rotary kiln 2 and the second rotary kiln 3. Temperature sensors 16 are installed on the upper sides of the first rotary kiln 2 and the second rotary kiln 3. A feed port 17 and an exhaust device 18 are installed on the upper side of the first rotary kiln 2. A discharge port 19 and an ignition device 20 are installed in the second rotary kiln 3.

[0023] Specifically, when the rotary kiln is used, the phosphorus tailings material is added into the first rotary kiln 2 from the feed port, the first rotary kiln 2 and the second rotary kiln 3 start to rotate, the material is fully dispersed and mixed by the offset protruding plate 21 in the first rotary kiln 2, and moves to the second rotary kiln 3 by gravity and centripetal force, when the material passes through the connecting pipe 4, the baffle 8 is forced to rotate around the movable connecting rod 11 to be in an open state, the vibration generating device 13 and the vibration spring 14 in the support frame 9 vibrate to accelerate the passage of the material, and the baffle 8 is reset by the top reset spring 12 after the material passes through, and the phosphorus tailings material is fully dispersed and evenly heated in the second rotary kiln 3 by the offset protruding plate 21, and the material is discharged from the discharge port by the rotation of the offset protruding plate 21 and the second rotary kiln 3. The first rotary kiln 2 is mainly used to quickly dry and evenly mix the phosphorus tailings material, the connecting pipe 4 is mainly used to transport the material to the second rotary kiln 3 at a uniform temperature, and prevent the material from flowing back, and the second rotary kiln 3 is mainly used to heat the material evenly and fully react to obtain a high-quality soil conditioner product. Under the synergistic effect of the first rotary kiln 2, the connecting pipe 4, the second rotary kiln 3, the baffle 8, the dislocation protrusion plate 21 and other components, the phosphorus tailings pyrometallurgical preparation of soil conditioners is more efficient and of better quality.

[0024] The above content is a further detailed description of the present application in combination with the specific implementation methods. It cannot be considered that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, simple modifications and replacements made without departing from the concept of the present application should be deemed to fall within the scope of protection of the present application.

Claims

1. A two-stage roasting device, comprising a placing table (1), characterized in that: A first rotary kiln (2) and a second rotary kiln (3) are mounted on the upper side of the placement platform (1). There is a certain height difference between the first rotary kiln (2) and the second rotary kiln (3). A connecting pipe (4) is connected between the first rotary kiln (2) and the second rotary kiln (3). The first rotary kiln (2) and the second rotary kiln (3) are arranged obliquely on the placement platform (1). Independent transmission gears (5), wheel belts (6) and tugs (7) are respectively provided on the first rotary kiln (2) and the second rotary kiln (3). A baffle (8) is provided inside the connecting pipe (4). A support frame (9) is provided outside the connecting pipe (4). A transmission gear (10) meshing with the independent transmission gear (5) is provided on the placement platform (1).

2. A two-stage roasting equipment according to claim 1, characterized in that: The diameter of the first rotary kiln (2) is smaller than that of the second rotary kiln (3), and the length of the first rotary kiln (2) is greater than that of the second rotary kiln (3).

3. A two-stage roasting equipment according to claim 1, characterized in that: The first rotary kiln (2) and the second rotary kiln (3) are respectively provided with a plurality of staggered protruding plates (21) along the length direction of the rotary kiln on their inner walls.

4. A two-stage roasting equipment according to claim 1, characterized in that: The independent transmission gears (5) are respectively located in the middle of the first rotary kiln (2) and the second rotary kiln (3); the independent transmission gears (5) are externally embedded gears; wheel belts (6) are respectively provided at both ends of the first rotary kiln (2) and the second rotary kiln (3); each wheel belt (6) corresponds to two tug wheels (7); and the two tug wheels (7) are respectively located on both sides of the rotary kiln.

5. A two-stage roasting equipment according to claim 1, characterized in that: The baffle (8) is arranged at a middle position in the connecting pipe (4); the upper end of the baffle (8) is rotatably connected to the top end of the connecting pipe (4) via a movable connecting rod (11); the bottom end of the baffle (8) is not connected to the connecting pipe (4); the baffle (8) is arranged at 90 degrees to the ground; and a return spring (12) is arranged between the baffle (8) and the top end of the connecting pipe (4).

6. A two-stage roasting equipment according to claim 1, characterized in that: A vibration generating device (13) is installed between the support frame (9) and the placement table, and multiple rows of vibration springs (14) are placed inside the support frame (9).

7. A two-stage roasting equipment according to claim 1, characterized in that: A fixing buckle (15) is installed between the placement platform (1) and the first rotary kiln (2) and the second rotary kiln (3), respectively; a temperature sensor (16) is installed on the upper side of the first rotary kiln (2) and the second rotary kiln (3); a feed port (17) and an exhaust device (18) are installed on the upper side of the first rotary kiln (2); and a discharge port (19) and an ignition device (20) are installed on the second rotary kiln (3).

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