Pellet sintering rotary kiln

Abstract

The utility model discloses a pellet sintering rotary kiln which comprises a kiln body, a feeding device arranged on the outer side of the kiln tail of the kiln body and used for controlling feeding, a rotating device arranged in the middle of the kiln body and used for driving the kiln body to rotate, and an inclined discharging device arranged at the bottom of the kiln tail of the kiln body and used for driving the kiln body to incline so as to rotate pellets out of the kiln head of the kiln body. Tilting and rotating combined discharging is adopted, whole-process automatic control is achieved, manual contact at high temperature is avoided, the scalding risk is reduced, and the operation reliability and stability of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the field of rotary kilns, and in particular discloses a pelletizing sintering rotary kiln. Background Art

[0002] The sintering rotary kiln adopts the principle of high-temperature reduction and oxidation. An appropriate amount of fuel is added to the kiln body to burn it, generate high-temperature gas, and heat the material to a high temperature state. The high-temperature gas can reduce the oxide to metal or semi-metal substances, so that the material can be sintered into blocks and finally form the desired product. At the same time, as the kiln body rotates, the material can be evenly heated, sintered and cooled, effectively improving production efficiency and product quality. However, the existing sintering rotary kiln is prone to ring formation and has a low degree of automation.

[0003] Therefore, the existing sintering rotary kiln is prone to ring formation and has a low degree of automation, which is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model provides a pelletizing sintering rotary kiln, aiming to solve the technical problems of easy ring formation and low automation degree in the existing sintering rotary kiln.

[0005] The utility model relates to a pellet sintering rotary kiln, comprising a kiln body, a feeding device arranged at the outer side of the kiln body and used for controlling the feeding, a rotating device arranged in the middle of the kiln body and used for driving the kiln body to rotate, and an inclined discharging device arranged at the bottom of the kiln body and used for driving the kiln body to tilt so as to rotate the pellets out of the kiln head.

[0006] Furthermore, the feeding device includes a door frame arranged on the outer wall of the kiln body and located at the kiln body inlet, a push door correspondingly installed on the door frame, and a push door mechanism connected to the push door for driving the push door to perform opening and closing control.

[0007] Furthermore, the door pushing mechanism adopts a hydraulic cylinder.

[0008] Furthermore, the rotating device comprises a motor, a transmission gear sleeved on the main shaft of the motor, and a gear ring arranged at the middle part of the outer side of the kiln body and meshing with the transmission gear.

[0009] Furthermore, the rotating device also includes a base, a roller arranged on the base, and a rolling ring sleeved on the outer side of the kiln body and matched with the roller.

[0010] Furthermore, the inclined discharging device includes an electric push rod and a support rod connected to the electric push rod.

[0011] Furthermore, a burner is arranged in the kiln body.

[0012] Furthermore, a thermocouple for detecting the furnace temperature is arranged inside the kiln body.

[0013] Furthermore, the thermocouple adopts a platinum-rhodium thermocouple.

[0014] Furthermore, a corundum protective sheath is provided on the thermocouple.

[0015] The beneficial effects achieved by the utility model are:

[0016] The utility model provides a pellet sintering rotary kiln, which comprises a kiln body, a feeding device arranged at the outer side of the kiln body to control the feeding, a rotating device arranged at the middle of the kiln body to drive the kiln body to rotate, and an inclined discharging device arranged at the bottom of the kiln body to drive the kiln body to tilt so as to rotate the pellets out of the kiln head. The pellet sintering rotary kiln provided by the utility model adopts tilting + rotating combined discharging, and is fully automated to avoid manual contact at high temperatures, reduce the risk of scalding, and improve the operating reliability and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a pelletizing sintering rotary kiln of the utility model;

[0018] Figure 2 for Figure 1 The front structural diagram of the pelletizing sintering rotary kiln shown in FIG.

[0019] Figure 3 for Figure 1 The schematic diagram of the top view structure of the pelletizing sintering rotary kiln is shown in FIG.

[0020] Description of Figure Numbers:

[0021] 10. Kiln body; 20. Feeding device; 30. Rotating device; 40. Inclined discharging device; 21. Door frame; 22. Push door; 23. Push door mechanism; 31. Motor; 32. Transmission gear; 33. Gear ring; 34. Base; 35. Roller; 36. Rolling ring. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figures 1 to 3As shown, the first embodiment of the utility model proposes a pellet sintering rotary kiln, including a kiln body 10, a feeding device 20 arranged at the outer side of the kiln tail of the kiln body 10 for controlling the feeding, a rotating device 30 arranged at the middle of the kiln body 10 for driving the kiln body 10 to rotate, and an inclined discharging device 40 arranged at the bottom of the kiln tail of the kiln body 10 for driving the kiln body 10 to tilt so as to rotate the pellets out of the kiln head of the kiln body 10. In this embodiment, the feeding device 20 can adopt a hydraulic feeding device or an electric feeding device. The rotating device 30 can adopt a gear rotating device, a roller rotating device or a bearing rotating device. The inclined discharging device 40 can adopt an electric inclined discharging device or a hydraulic inclined discharging device, all of which are within the protection scope of this patent.

[0024] Further, see Figures 1 to 3 In the pelletizing sintering rotary kiln provided in this embodiment, the feeding device 20 includes a door frame 21 provided on the outer wall of the kiln body 10 and located at the inlet of the kiln body 10, a push door 22 correspondingly installed on the door frame 21, and a push door mechanism 23 connected to the push door 22 for driving the push door 22 to open and close. In this embodiment, the push door mechanism 23 adopts a hydraulic cylinder.

[0025] Preferably, see Figures 1 to 3 The pellet sintering rotary kiln provided in this embodiment, the rotating device 30 includes a motor 31, a transmission gear 32 sleeved on the main shaft of the motor 31, and a gear ring 33 provided at the middle of the outer side of the kiln body 10 and meshing with the transmission gear 32. In this embodiment, the rotating device 30 also includes a base 34, a roller 35 provided on the base 34, and a roller ring 36 sleeved on the outer side of the kiln body 10 and matched with the roller 35. The pellet sintering rotary kiln provided in this embodiment, through the motor 31, drives the transmission gear 32, the gear ring 33 and the kiln body 10 to move in sequence, so that the pellets are discharged in a tilting + rotating manner, which well solves the technical problem of pellet ringing, and has a high degree of automation.

[0026] Further, see Figures 1 to 3 The pelletizing sintering rotary kiln provided in this embodiment, the inclined discharging device 40 includes an electric push rod and a support rod connected to the electric push rod. The support rod is supported below the tail of the kiln body 10. In this embodiment, the electric push rod drives the support rod to move, and the tail of the kiln body 10 is lifted up, so that the kiln body 10 is rotated and tilted about 30°. At the same time, the kiln body 10 is rotated by the rotating device 30 to rotate the pellets out of the head of the kiln body 10. A burner is provided in the body of the kiln body 10. A thermocouple for detecting the furnace temperature is provided in the body of the kiln body 10. The thermocouple adopts a platinum-rhodium thermocouple. A corundum protective cover is provided on the thermocouple. The pelletizing sintering rotary kiln provided in this embodiment adopts a thermocouple to monitor the temperature in the body of the kiln body 10, and has a high degree of automation.

[0027] like Figures 1 to 3As shown, the pelletizing sintering rotary kiln provided in this embodiment has the following working principle:

[0028] The pellet sintering rotary kiln provided in this embodiment is preheated to 800°C before feeding. When feeding, the feeding device 20 is driven to open the push door 22 at the kiln tail of the kiln body 10, and the materials are added from the kiln tail. After the materials are added, the burner is ignited, and the kiln body 10 continues to heat the pellets. When the heating reaches the time specified by the process, the burner is turned horizontally, and then the electric push rod on the inclined discharge device 40 lifts up the kiln tail side, so that the kiln body 10 rotates and tilts about 30°. At the same time, the rotating device 30 rotates the kiln body 10, and the pellets are rotated out from the kiln head of the kiln body 10.

[0029] In order to prevent the surface temperature of the kiln body 10 from being too high, the inner layer in contact with the pellets is made of high-aluminum corundum material with a thickness of 50 mm, and the outer layer is made of lightweight castable material with low thermal conductivity with a thickness of 100 mm.

[0030] The pellet sintering rotary kiln is surrounded by guardrails to prevent students from accidentally touching the kiln and getting burned. A 300mm high skirting board is set at the bottom of the guardrail to prevent high-temperature pellets from falling to the ground and rolling outside the guardrail to burn people passing by.

[0031] A platinum-rhodium thermocouple with a corundum protective cover is used to detect the furnace temperature, and the thermocouple protrudes slightly from the inner wall by 5 to 10 mm.

[0032] The flue gas coming out of the kiln tail hood passes through the water-cooled flue gas duct and is reduced to below 800 degrees Celsius. It then enters the heat exchange duct. The fresh air and flue gas exchange heat through the tubes. The current more efficient heat exchanger has an efficiency of about 65%.

[0033] After the exhaust gas is heat exchanged, the exhaust gas temperature is adjusted by controlling the opening and closing degree of the exhaust gas supplementary cooling air valve through thermocouple temperature measurement. The target exhaust gas temperature is controlled to be lower than 150℃.

[0034] Compared with the prior art, the pellet sintering rotary kiln provided in this embodiment adopts a kiln body, a feeding device arranged outside the kiln body kiln tail for controlling the feeding, a rotating device arranged in the middle of the kiln body for driving the kiln body to rotate, and an inclined discharging device arranged at the bottom of the kiln body kiln tail for driving the kiln body to tilt so as to rotate the pellets out of the kiln head of the kiln body. The pellet sintering rotary kiln provided in this embodiment adopts tilting + rotating combined discharging, and is fully automated to avoid manual contact at high temperatures, reduce the risk of scalding, and improve the operating reliability and stability of the equipment.

[0035] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pelletizing rotary kiln, It is characterized in that The invention comprises a kiln body (10), a feeding device (20) arranged at the outer side of the kiln tail of the kiln body (10) for controlling the feeding, a rotating device (30) arranged at the middle of the kiln body (10) for driving the kiln body (10) to rotate, and an inclined discharging device (40) arranged at the bottom of the kiln tail of the kiln body (10) for driving the kiln body (10) to tilt so as to rotate the pellets out of the kiln head of the kiln body (10).

2. The pelletizing rotary kiln according to claim 1, It is characterized in that The feeding device (20) comprises a door frame (21) arranged on the outer wall of the kiln body (10) and located at the feeding port of the kiln body (10), a push door (22) correspondingly mounted on the door frame (21), and a push door mechanism (23) connected to the push door (22) and used to drive the push door (22) to perform opening and closing control.

3. The pelletizing rotary kiln according to claim 2, It is characterized in that The door pushing mechanism (23) adopts a hydraulic cylinder.

4. The pelletizing rotary kiln according to claim 1, It is characterized in that The rotating device (30) comprises a motor (31), a transmission gear (32) sleeved on the main shaft of the motor (31), and a gear ring (33) disposed at the middle of the outer side of the kiln body (10) and meshing with the transmission gear (32).

5. The pelletizing rotary kiln according to claim 4, It is characterized in that The rotating device (30) further comprises a base (34), a roller (35) arranged on the base (34), and a rolling ring (36) sleeved on the outside of the kiln body (10) and matched with the roller (35).

6. The pelletizing rotary kiln according to claim 1, It is characterized in that The inclined discharging device (40) comprises an electric push rod and a support rod connected to the electric push rod.

7. The pelletizing rotary kiln according to claim 1, It is characterized in that The kiln body (10) is provided with a burner.

8. The pelletizing rotary kiln according to claim 1, It is characterized in that The kiln body (10) is provided with a thermocouple for detecting the furnace temperature.

9. The pelletizing rotary kiln according to claim 8, It is characterized in that The thermocouple is a platinum-rhodium thermocouple.

10. The pelletizing rotary kiln according to claim 8, It is characterized in that The thermocouple is covered with a corundum protective cover.

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