Nickel ore roasting kiln capable of recycling waste heat

Abstract

The invention discloses a nickel ore roasting kiln for waste heat recovery, and relates to the technical field of nickel ore roasting kilns, the nickel ore roasting kiln comprises a base plate and a heat recovery assembly, the heat recovery assembly is arranged above the base plate, and the heat recovery assembly comprises a discharging frame, a discharging groove, a partition frame, an air adding cover, a rotating groove, an air inlet pipe, an air adding groove, an air inlet, an inclined hole, a heat insulation shell and a heat absorption coil pipe; a discharging frame is arranged above one side of the chassis, and discharging grooves are symmetrically formed in one side of the discharging frame. When the device is used, heat emitted by the shell can be recycled, air is heated through the heat, the air supply temperature is increased, then the roasting efficiency is improved, heat of high-temperature tail gas can be used for conducting waste heat on raw materials, the roasting efficiency is improved, the raw materials are smashed before preheating, insufficient roasting caused by the fact that the raw materials are too large is avoided, and the service life of the raw materials is prolonged. During roasting, the raw materials can be turned and conveyed, and the suspension time of the raw materials is prolonged, so that the mixing effect of the raw materials and air is improved, and the roasting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nickel ore roasting kilns, in particular to a nickel ore roasting kiln with waste heat recovery. Background Art

[0002] Currently, the nickel resources available for human development and utilization are limited to terrestrial nickel sulfide ores and laterite nickel ores. With the increasing scarcity of sulfide ore resources, the expansion of nickel production will mainly come from laterite nickel ores. Laterite nickel ore roasting kiln refers to production equipment specially designed for the production of laterite nickel. Laterite nickel ore roasting equipment generally uses a rotary kiln.

[0003] During the process of roasting laterite nickel ore in a rotary kiln, the outer shell of the rotary kiln has a certain high temperature due to the conduction of internal heat on the outer shell of the rotary kiln. However, due to the lack of an effective radiation heat collection device on the outside of the rotary kiln cylinder, the heat on the outer shell of the rotary kiln cylinder is generally directly dissipated into the outdoor air, making it impossible to effectively recover and utilize the radiant heat of the rotary kiln, thereby wasting the thermal energy resources generated by the rotary kiln.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a nickel ore roasting kiln with waste heat recovery is proposed. Summary of the invention

[0005] The object of the present invention is to provide a nickel ore roasting kiln with waste heat recovery to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a nickel ore roasting kiln for waste heat recovery, comprising a chassis and a heat recovery component, wherein a heat recovery component is arranged above the chassis, and the heat recovery component comprises a discharge frame, a discharge trough, a partition frame, a gas hood, a rotating trough, an air inlet pipe, a gas trough, an air inlet, an inclined hole, a heat insulation shell and a heat absorption coil, a discharge frame is arranged above one side of the chassis, and a discharge trough is symmetrically arranged on one side of the discharge frame, a partition frame is arranged on the other side of the discharge frame, and a gas hood is connected to one side of the partition frame, a rotating trough is provided on one side of the gas hood, and an air inlet pipe is connected to the other side of the gas hood, a gas trough is provided in the gas hood, and an air inlet is provided on one side of the gas hood, inclined holes are symmetrically provided on the inner side of the gas trough, an insulation shell is connected to the top of the discharge frame, and a heat absorption coil is arranged in the insulation shell.

[0007] Furthermore, the discharge trough is obliquely distributed in the discharge frame, and the discharge frame is connected to the interior of the heat insulation shell, and the heat absorption coil is connected to the gas supply trough through the air inlet.

[0008] Furthermore, a rotating drum is arranged inside the heat-insulating shell, and a feeding plate is connected to the inside of the rotating drum. Partition plates are symmetrically connected to the inner wall of the rotating drum, and a discharge port is opened on one side of the rotating drum.

[0009] Furthermore, the rotating drum is rotatably connected to the gas hood via a rotating groove, and the rotating drum is fitted with a partition frame, the discharge port is located in the partition frame, and the feeding plate is spirally distributed in the rotating drum.

[0010] Furthermore, a gear ring is connected to the other side of the rotating drum, and a driving wheel is meshedly provided on one side of the gear ring, and a driving motor is connected to one side of the driving wheel, and the driving motor is fixed on the chassis.

[0011] Furthermore, a feed bin is arranged above the other side of the chassis, and a smoke exhaust pipe is arranged above the feed bin, an air supply pipe is arranged in the smoke exhaust pipe, and a blower is connected to one side of the air supply pipe, and the air supply pipe is connected to the heat absorbing coil.

[0012] Furthermore, a receiving plate is obliquely arranged at the lower part of the feed bin, and a feed pipe is connected to the side of the feed bin close to the rotating drum. The feed pipe is rotatably connected to the rotating drum, and the inner cavity of the feed pipe is inclined.

[0013] Furthermore, a heating cylinder is arranged in the middle of the feed bin, and a feeding pipe is connected below the heating cylinder. A feed cylinder is connected to the upper part of the feed bin, and fixing rods are symmetrically connected inside the feed cylinder.

[0014] Furthermore, an annular groove is provided on one side of the heating cylinder and the feeding cylinder, and a fan ring is rotatably connected in the annular groove. Scraper rods are symmetrically connected to the outside of the fan ring, and the scraper rods on the upper and lower sides of the fan ring are respectively attached to the feeding cylinder and the heating cylinder.

[0015] Furthermore, a secondary crushing rod is connected to the inner side of the fan ring, and a spiral rod is connected to one side of the secondary crushing rod, and a primary crushing rod is connected to the other side of the secondary crushing rod, and the primary crushing rod and the fixed rod are staggered inside the feed barrel.

[0016] The present invention provides a nickel ore roasting kiln with waste heat recovery, which has the following beneficial effects: when in use, the heat emitted by the shell can be recovered and used to heat the air, thereby increasing the air supply temperature and thus improving the roasting efficiency; the heat of the high-temperature exhaust gas can be used to recover the waste heat of the raw materials, thereby improving the roasting efficiency; the raw materials can be crushed before preheating to avoid insufficient roasting due to excessive raw materials; the raw materials can be turned and transported during roasting to extend their suspension time, thereby improving the mixing effect of the raw materials and air, thereby improving the roasting efficiency.

[0017] 1. When the present invention is in use, the heat-insulating shell can gather the radiant heat generated by the drum during roasting, and use it to heat the air in the heat-absorbing coil. The heated air enters the aeration tank from the heat-absorbing coil through the air inlet, and then is evenly blown into the inner side of the aeration hood through the inclined hole, and enters the drum together with the gas sprayed into the aeration hood from the air inlet pipe to roast the raw materials, and heats the gas to increase the gas delivery temperature. After the roasted materials enter the discharge frame, they can slide along the inclined surface inside the discharge frame and then leave the discharge frame through the discharge trough. The material frame is cooled during the sliding process, and the hot air emitted by the material can enter the insulation shell from the discharge frame to assist in heating the air in the heat-absorbing coil. The partition frame can seal the discharge side of the drum to prevent the material from scattering, while gathering the heat emitted by the material and reheating the air entering the drum through the drum to increase the intake temperature again. In summary, when in use, the radiant heat of the drum and the heat of the discharge material can be recycled to heat the incoming air and gas, thereby increasing the air supply temperature.

[0018] 2. During roasting, the present invention can drive the drum to rotate by driving the gear ring through the transmission wheel. After the raw materials are fed into the drum, the drum can transport the raw materials through the feed plate by rotation, and the partition can receive the materials between the feed plates, so that they move with the rotation of the drum. When the partition moves the materials to the upper part of the drum, the materials can slide down along the partition, thereby being briefly suspended on the inside of the drum and mixed with the injected gas, thereby improving the roasting efficiency. After roasting, the materials move to the discharge port with the rotation and fall into the discharge frame to complete the unloading. In summary, the raw materials can be turned over and transported during roasting to extend their suspension time, thereby improving the mixing effect of the raw materials and air, thereby improving the roasting efficiency.

[0019] 3. When the present invention is in use, the raw materials are put into the feeding barrel, and the high-temperature flue gas generated during roasting can heat the raw materials in the feeding barrel through the heating barrel, and the inclined feeding tube can prevent the flue gas from entering the heating barrel from the feeding tube and blowing up the raw material powder, and the funnel-shaped heating barrel can make the raw materials accumulate in the heating barrel, thereby extending its heating time and achieving a better preheating effect. When the flue gas rises in the feeding bin, it can drive the fan ring to rotate in the ring groove, so that the primary crushing rod cooperates with the fixed rod to perform the primary crushing of the raw materials. After the raw materials fall to the fan ring, the secondary crushing rod can perform the secondary crushing of the raw materials as the fan ring rotates, thereby reducing the volume of the raw materials and facilitating their roasting. After the materials fall into the heating barrel and accumulate therein, as the fan ring rotates, the secondary crushing rod can drive the spiral The rod rotates to squeeze the material in the heating cylinder and squeeze it into the feeding pipe. After the material falls from the feeding pipe, it can enter the rotating cylinder from the feeding pipe along the receiving plate for roasting. After the flue gas enters the exhaust pipe from the feed bin, the air sent into the air supply pipe by the blower can be heated for the first time. After being heated in the air supply pipe, the air enters the heat absorbing coil. When the fan ring rotates, it can drive the scraper rod to move along the outer wall of the heating cylinder and the feeding cylinder, thereby cleaning the dust adhering to the outer wall of the heating cylinder and the feeding cylinder to prevent the dust from eroding the outer wall of the heating cylinder and the feeding cylinder. In summary, when in use, the heat of the high-temperature exhaust gas can be used to treat the raw materials as waste heat, thereby improving the roasting efficiency, and the raw materials can be crushed before preheating to avoid insufficient roasting due to excessive raw materials, and automatic cleaning can be performed at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a half-cutaway three-dimensional exploded structure of a heat recovery component of a nickel ore roasting kiln for waste heat recovery according to the present invention; Figure 2 It is a schematic diagram of a half-cut three-dimensional side view of the structure of a discharge frame of a nickel ore roasting kiln with waste heat recovery according to the present invention; Figure 3 It is a schematic diagram of a half-exploded three-dimensional structure of a rotary drum of a nickel ore roasting kiln for waste heat recovery according to the present invention; Figure 4 This is a schematic diagram of the overall three-dimensional structure of a nickel ore roasting kiln with waste heat recovery according to the present invention; Figure 5 It is a schematic diagram of the cross-sectional front view of a nickel ore roasting kiln with waste heat recovery according to the present invention; Figure 6 It is a schematic diagram of the overall half-section three-dimensional structure of a nickel ore roasting kiln for waste heat recovery according to the present invention; Figure 7 It is a schematic diagram of a half-exploded three-dimensional structure of a feed bin of a nickel ore roasting kiln with waste heat recovery according to the present invention.

[0021] In the figure: 1. chassis; 2. heat recovery component; 201. discharge frame; 202. discharge trough; 203. partition frame; 204. gas hood; 205. rotating trough; 206. air inlet pipe; 207. gas trough; 208. air inlet; 209. inclined hole; 210. insulation shell; 211. heat absorbing coil; 3. rotating drum; 4. feeding plate; 5. partition; 6. discharge port; 7. gear ring; 8. driving wheel; 9. driving motor; 10. feeding bin; 11. smoke exhaust pipe; 12. air supply pipe; 13. air supply fan; 14. receiving plate; 15. feeding pipe; 16. heating cylinder; 17. feeding pipe; 18. feeding cylinder; 19. fixing rod; 20. ring groove; 21. fan ring; 22. scraper rod; 23. secondary crushing rod; 24. spiral rod; 25. primary crushing rod. DETAILED DESCRIPTION

[0022] See also Figures 1 to 7 The present invention provides a technical solution: a nickel ore roasting kiln for waste heat recovery, comprising a chassis 1 and a heat recovery component 2, the heat recovery component 2 is arranged above the chassis 1, the heat recovery component 2 comprises a discharge frame 201, a discharge trough 202, a partition frame 203, a gas cover 204, a rotating trough 205, an air inlet pipe 206, a gas adding trough 207, an air inlet 208, an inclined hole 209, an insulation shell 210 and a heat absorbing coil 211, a discharge frame 201 is arranged above one side of the chassis 1, and a discharge trough is symmetrically arranged on one side of the discharge frame 201 202, a partition frame 203 is arranged on the other side of the discharge frame 201, and a gas-filling hood 204 is connected to one side of the partition frame 203, a rotating groove 205 is provided on one side of the gas-filling hood 204, and an air inlet pipe 206 is connected to the other side of the gas-filling hood 204, a gas-filling groove 207 is provided in the gas-filling hood 204, and an air inlet 208 is provided on one side of the gas-filling hood 204, inclined holes 209 are symmetrically provided on the inner side of the gas-filling groove 207, an insulating shell 210 is connected to the top of the discharge frame 201, and a heat-absorbing coil 211 is provided in the insulating shell 210.

[0023] See also Figures 1 to 6 , the discharge trough 202 is obliquely distributed in the discharge frame 201, and the discharge frame 201 is connected to the inside of the insulation shell 210, the heat absorbing coil 211 is connected to the gas filling trough 207 through the air inlet 208, a rotating drum 3 is arranged on the inner side of the insulation shell 210, and a feeding plate 4 is connected to the inner side of the rotating drum 3, a partition plate 5 is symmetrically connected to the inner wall of the rotating drum 3, and a discharge port 6 is opened on one side of the rotating drum 3, the rotating drum 3 is rotatably connected to the gas filling hood 204 through the rotating trough 205, and the rotating drum 3 is fitted with the partition frame 203, the discharge port 6 is located in the partition frame 203, the feeding plate 4 is spirally distributed in the rotating drum 3, a gear ring 7 is connected to the other side of the rotating drum 3, and a driving wheel 8 is meshed with one side of the gear ring 7, a driving motor 9 is connected to one side of the driving wheel 8, and the driving motor 9 is fixed on the chassis 1; The specific operation is as follows: when in use, the heat-insulating shell 210 can gather the radiant heat generated by the drum 3 during roasting, and use it to heat the air in the heat-absorbing coil 211. The heated air enters the gas-filling tank 207 from the heat-absorbing coil 211 through the air inlet 208, and then is evenly blown into the inner side of the gas-filling hood 204 through the inclined hole 209, and enters the drum 3 together with the gas sprayed into the gas-filling hood 204 from the air inlet pipe 206 to roast the raw materials, and heat the gas to increase the delivery temperature. After the roasted material enters the discharge frame 201, it can slide along the inclined surface inside the discharge frame 201 and then leave the discharge frame 201 through the discharge chute 202. It is cooled during the sliding process, and the hot air emitted by the material can enter the insulation shell 210 from the discharge frame 201 to assist in heating the air in the heat absorbing coil 211. The partition frame 203 can close the discharge side of the drum 3 to prevent the material from scattering, while gathering the heat emitted by the material and heating the heat entering the drum 3. The air in the drum 3 is heated twice to increase the intake temperature again. In summary, when in use, the radiant heat of the drum 3 and the heat of the discharged material can be recycled and utilized, and the supplied air and fuel gas can be heated to increase the supply air temperature. During roasting, the driving motor 9 can drive the drum 3 to rotate through the transmission wheel to make the gear ring 7 drive the drum 3 to rotate. After the raw materials are fed into the drum 3, the drum 3 can transport the raw materials through the feeding plate 4 by rotation, and the partition 5 can receive the materials between the feeding plates 4, so that they move with the rotation of the drum 3. When the partition 5 moves the materials to the upper part of the drum 3, the materials can slide down along the partition 5, so as to be briefly suspended on the inside of the drum 3 and mixed with the injected fuel gas, so as to improve the roasting efficiency. After the roasting is completed, the materials move to the discharge port 6 with the rotation and fall into the discharge frame 201 to complete the unloading. In summary, the raw materials can be turned and transported during roasting to extend their suspension time, so as to improve the mixing effect of the raw materials and air, thereby improving the roasting efficiency.

[0024] See also Figures 4 to 7A feed bin 10 is arranged above the other side of the chassis 1, and a smoke exhaust pipe 11 is arranged above the feed bin 10, an air supply pipe 12 is arranged in the smoke exhaust pipe 11, and a blower 13 is connected to one side of the air supply pipe 12, and the air supply pipe 12 is connected to the heat absorbing coil 211, a receiving plate 14 is arranged obliquely at the lower part of the feed bin 10, and a feed pipe 15 is connected to the side of the feed bin 10 close to the rotating drum 3, the feed pipe 15 is rotatably connected to the rotating drum 3, and the inner cavity of the feed pipe 15 is inclined, a heating cylinder 16 is arranged in the middle part of the feed bin 10, and a feeding pipe 17 is connected below the heating cylinder 16, and a feeder 17 is connected to the upper part of the feed bin 10. The material barrel 18 is provided with a fixing rod 19 symmetrically connected to the inside of the material barrel 18. The heating barrel 16 and the feeding barrel 18 are provided with an annular groove 20 on one side thereof, and a fan ring 21 is rotatably connected to the inside of the annular groove 20. The outside of the fan ring 21 is symmetrically connected with a scraper rod 22, and the scraper rods 22 on the upper and lower sides of the fan ring 21 are respectively attached to the material barrel 18 and the heating barrel 16. The inside of the fan ring 21 is connected with a secondary crushing rod 23, and one side of the secondary crushing rod 23 is connected with a spiral rod 24, and the other side of the secondary crushing rod 23 is connected with a primary crushing rod 25, and the primary crushing rod 25 and the fixing rod 19 are staggeredly distributed on the inside of the feeding barrel 18. The specific operation is as follows. When in use, the raw material is put into the feed barrel 18. The high-temperature flue gas generated during roasting can heat the raw material inside through the heating barrel 16, and the inclined feeding pipe 17 can prevent the flue gas from entering the heating barrel 16 from the feed pipe 15 and blowing up the raw material powder. The funnel-shaped heating barrel 16 can make the raw material accumulate in the heating barrel 16, thereby extending its heating time and achieving a better preheating effect. When the flue gas rises in the feed bin 10, it can drive the fan ring 21 to rotate in the ring groove 20, so that the primary crushing rod 25 cooperates with the fixed rod 19 to perform the primary crushing of the raw material. After the raw material falls to the fan ring 21, the secondary crushing rod 23 can perform the secondary crushing of the raw material as the fan ring 21 rotates, thereby reducing the volume of the raw material and facilitating its roasting. After the material falls to the heating barrel 16 and accumulates therein, as the fan ring 21 rotates, the secondary crushing rod 23 can drive the spiral rod 2 4 rotates to squeeze the material in the heating cylinder 16 and squeeze it into the feeding pipe 17. After the material falls from the feeding pipe 17, it can enter the rotating cylinder 3 from the feeding pipe 15 along the receiving plate 14 for roasting. After the smoke enters the exhaust pipe 11 from the feeding bin 10, the air sent into the air supply pipe 12 by the blower 13 can be initially heated. After being heated in the air supply pipe 12, the air enters the heat absorbing coil 211. When the fan ring 21 rotates, it can drive the scraper 22 to move along the outer walls of the heating cylinder 16 and the feeding cylinder 18, so as to clean the dust adhering to the outer walls of the heating cylinder 16 and the feeding cylinder 18, so as to avoid the dust from eroding the outer walls of the heating cylinder 16 and the feeding cylinder 18. In summary, when in use, the heat of the high-temperature exhaust gas can be used to treat the raw materials with waste heat, so as to improve the roasting efficiency, and the raw materials can be crushed before preheating to avoid insufficient roasting due to excessive raw materials, and automatic cleaning can be performed at the same time.

[0025] In summary, when the nickel ore roasting kiln with waste heat recovery is used, the raw materials are first put into the feed tube 18, and the high-temperature flue gas generated during roasting can heat the raw materials therein through the heating tube 16, and the inclined feeding tube 17 can prevent the flue gas from entering the heating tube 16 from the feed tube 15 and blowing up the raw material powder, and the funnel-shaped heating tube 16 can make the raw materials accumulate in the heating tube 16, thereby extending its heating time and achieving a better preheating effect. When the flue gas rises in the feed bin 10, it can drive the fan ring 21 to rotate in the ring groove 20, so that the primary crushing rod 25 cooperates with the fixed rod 19 to perform the primary crushing on the raw materials. After the raw materials fall to the fan ring 21, the secondary crushing rod 23 can perform the secondary crushing on the raw materials as the fan ring 21 rotates. Thereby reducing the volume of the raw materials and facilitating their roasting. After the materials fall into the heating cylinder 16 and accumulate therein, as the fan ring 21 rotates, the secondary crushing rod 23 can drive the spiral rod 24 to rotate, squeeze the materials in the heating cylinder 16, and squeeze them into the feeding pipe 17. After the materials fall from the feeding pipe 17, they can enter the rotating cylinder 3 from the feeding pipe 15 along the receiving plate 14 for roasting. After the smoke enters the exhaust pipe 11 from the feeding bin 10, the air sent into the air supply pipe 12 by the blower 13 can be heated for the first time. After the air is heated in the air supply pipe 12, it enters the heat absorbing coil 211. When the fan ring 21 rotates, it can drive the scraper rod 22 to move in contact with the outer wall of the heating cylinder 16 and the feeding cylinder 18, thereby crushing the materials adhering to the heating cylinder 1 6 and the outer wall of the feed cylinder 18 are cleaned to prevent the dust from corroding the outer wall of the heating cylinder 16 and the feed cylinder 18. During roasting, the driving motor 9 can drive the gear ring 7 to drive the drum 3 to rotate through the transmission wheel. After the raw materials are fed into the drum 3, the drum 3 can transport the raw materials through the feeding plate 4 by rotation, and the partition 5 can receive the materials between the feeding plates 4, so that they can move with the rotation of the drum 3. When the partition 5 moves the materials to the upper part of the drum 3, the materials can slide down along the partition 5, so as to be briefly suspended on the inside of the drum 3 and mixed with the injected gas, so as to improve the roasting efficiency. After the roasting is completed, the materials move to the discharge port 6 with the rotation and fall into the discharge frame 201 to complete the unloading. The heat insulation shell 210 can gather the radiant heat generated by the drum 3 during roasting, and use it to heat the air in the heat absorbing coil 211. The heated air enters the gas filling groove 207 from the heat absorbing coil 211 through the air inlet 208, and then is evenly blown into the inner side of the gas filling hood 204 through the inclined hole 209, and enters the drum 3 together with the gas sprayed into the gas filling hood 204 from the air inlet pipe 206 to roast the raw materials, and heat the gas to increase the gas delivery temperature. After the roasted materials enter the discharge frame 201, they can slide along the inclined surface inside the discharge frame 201 and then leave the discharge frame 201 through the discharge groove 202, and cool down during the sliding process. The hot air emitted by the materials can enter the heat insulation shell 210 from the discharge frame 201.The air in the heat absorbing coil 211 is auxiliary heated, and the partition frame 203 can seal the discharge side of the drum 3 to prevent the material from scattering, while collecting the heat emitted by the material, and reheat the air entering the drum 3 through the drum 3 to increase the intake temperature again.

[0026] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A nickel ore roasting kiln with waste heat recovery, characterized in that: The invention comprises a chassis (1) and a heat recovery component (2), wherein the heat recovery component (2) is arranged above the chassis (1), and the heat recovery component (2) comprises a discharge frame (201), a discharge trough (202), a partition frame (203), an air supply cover (204), a rotating trough (205), an air intake pipe (206), an air supply trough (207), an air intake port (208), an inclined hole (209), a heat insulation shell (210), and a heat absorbing coil (211), wherein the discharge frame (201) is arranged above one side of the chassis (1), and the discharge trough (202) is symmetrically arranged on one side of the discharge frame (201), and the discharge frame (201) is provided with a heat recovery component (201). 1) A partition frame (203) is provided on the other side, and a gas-filling hood (204) is connected to one side of the partition frame (203), a rotation groove (205) is provided on one side of the gas-filling hood (204), and an air inlet pipe (206) is connected to the other side of the gas-filling hood (204), a gas-filling groove (207) is provided in the gas-filling hood (204), and an air inlet (208) is provided on one side of the gas-filling hood (204), and oblique holes (209) are symmetrically provided on the inner side of the gas-filling groove (207), and a heat-insulating shell (210) is connected to the top of the discharge frame (201), and a heat-absorbing coil (211) is provided in the heat-insulating shell (210).

2. A nickel ore roasting kiln with waste heat recovery according to claim 1, characterized in that: The discharge trough (202) is distributed obliquely in the discharge frame (201), and the discharge frame (201) is connected to the interior of the heat-insulating shell (210), and the heat-absorbing coil (211) is connected to the gas supply trough (207) via the air inlet (208).

3. The nickel ore roasting kiln with waste heat recovery according to claim 1, characterized in that: A rotating drum (3) is arranged inside the heat-insulating shell (210), and a feeding plate (4) is connected to the inside of the rotating drum (3). A partition plate (5) is symmetrically connected to the inner wall of the rotating drum (3), and a discharge port (6) is provided on one side of the rotating drum (3).

4. A nickel ore roasting kiln with waste heat recovery according to claim 3, characterized in that: The rotating drum (3) is rotatably connected to the gas hood (204) via a rotating groove (205), and the rotating drum (3) is fitted with a partition frame (203). The discharge port (6) is located in the partition frame (203), and the feeding plate (4) is spirally distributed in the rotating drum (3).

5. The nickel ore roasting kiln with waste heat recovery according to claim 3, characterized in that: The other side of the rotating drum (3) is connected to a gear ring (7), and one side of the gear ring (7) is meshed with a driving wheel (8), and one side of the driving wheel (8) is connected to a driving motor (9), and the driving motor (9) is fixed on the chassis (1).

6. The nickel ore roasting kiln with waste heat recovery according to claim 3, characterized in that: A feed bin (10) is arranged above the other side of the chassis (1), and a smoke exhaust pipe (11) is arranged above the feed bin (10). An air supply pipe (12) is arranged inside the smoke exhaust pipe (11), and a blower (13) is connected to one side of the air supply pipe (12). The air supply pipe (12) is connected to the heat absorbing coil (211).

7. A nickel ore roasting kiln with waste heat recovery according to claim 6, characterized in that: A receiving plate (14) is obliquely arranged at the lower part of the feed bin (10), and a feed pipe (15) is connected to a side of the feed bin (10) close to the rotating drum (3). The feed pipe (15) is rotatably connected to the rotating drum (3), and the inner cavity of the feed pipe (15) is inclined.

8. The nickel ore roasting kiln with waste heat recovery according to claim 6, characterized in that: A heating cylinder (16) is arranged in the middle of the feed bin (10), and a feeding pipe (17) is connected below the heating cylinder (16). A feed cylinder (18) is connected to the upper part of the feed bin (10), and fixing rods (19) are symmetrically connected inside the feed cylinder (18).

9. A nickel ore roasting kiln with waste heat recovery according to claim 8, characterized in that: An annular groove (20) is provided on one side of the heating tube (16) and the feeding tube (18) that are close to each other, and a fan ring (21) is rotatably connected in the annular groove (20). Scraping rods (22) are symmetrically connected to the outside of the fan ring (21), and the scraping rods (22) on the upper and lower sides of the fan ring (21) are respectively attached to the feeding tube (18) and the heating tube (16).

10. A nickel ore roasting kiln with waste heat recovery according to claim 9, characterized in that: A secondary crushing rod (23) is connected to the inner side of the fan ring (21), and a spiral rod (24) is connected to one side of the secondary crushing rod (23), and a primary crushing rod (25) is connected to the other side of the secondary crushing rod (23), and the primary crushing rod (25) and the fixed rod (19) are staggeredly distributed inside the feed barrel (18).

Images