Space tubular reduction roasting furnace

Abstract

The utility model discloses a space pipe type reduction roasting furnace which comprises a furnace body, an ash discharging spiral is welded at the bottom of the furnace body, a plurality of fuel adding holes are formed in the side wall of the bottom of the furnace body, a plurality of transverse layers are transversely welded on the inner side wall of the furnace body in a staggered mode, pipe bodies are arranged in channels on the two sides of the transverse layers, and the bottommost pipe body is communicated with a discharging pipe. A stock bin is welded to the top of the furnace body, a tail gas pipeline is welded to the stock bin, the bottom of the stock bin is communicated with a pipe body, a connecting rod is arranged in the pipe body, the end of the connecting rod is in bolted connection with a hydraulic propeller, and a plurality of opening and closing structures are fixedly connected to the two sides of the connecting rod. According to the rotary kiln, the roasting treatment capacity far exceeding that of a rotary kiln of the same model is achieved, the industrial yield is improved, the roundabout high-temperature flue gas channel structure enables heat exchange between minerals and heat energy to be more efficient, higher heat efficiency is achieved, and meanwhile the problems that in the prior art, the reduction rate is low, and mineral oxidation is serious are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of roasting equipment and relates to a space tube type reduction roasting furnace. Background Art

[0002] Reduction roasters are important mineral reduction equipment. In a reducing atmosphere, they can reduce metal oxides in ores or concentrates to metals or low-valent oxides of the metal. Reduction roasters are widely used to reduce a variety of metal powders, including iron powder, copper powder, cobalt powder, nickel powder, tungsten powder, molybdenum powder, etc. In addition, they can also be used to calcine metal salts such as cobalt oxalate and APT. In the prior art, belt reduction furnaces are used in the production of metal powders, ceramic products, and other fields, such as the preparation of stainless steel powder and the production of cemented carbide and other materials. However, belt reduction furnaces have high requirements for the purity of raw materials. If the raw materials contain impurities or oxidizing components, it will affect the stability of the furnace atmosphere, thereby affecting the treatment effect. In addition, the internal structure of belt reduction furnaces is relatively complex, and the maintenance cost is high, which cannot meet the production requirements of cost reduction and efficiency improvement.

[0003] The patent application text with publication number CN209508359U, "A Rotary Tube Furnace Roasting System" (publication date October 18, 2019), discloses a rotary tube furnace roasting system. The rotary tube furnace roasting system has a simple and reasonable structure, uniform roasting without sintering, stable discharge and effective collection of roasting fly ash and flue gas. However, this rotary tube furnace roasting system has the problems of low filling rate of reducing materials and severe mineral oxidation. Utility Model Content

[0004] The purpose of the utility model is to provide a space tube type reduction roasting furnace, which solves the problems of low reduction rate and serious mineral oxidation in the prior art.

[0005] The technical solution adopted by the utility model is a spatial tubular reduction roasting furnace, comprising a furnace body, an ash discharge spiral welded at the bottom of the furnace body, a plurality of fuel adding holes opened on the side wall of the bottom of the furnace body, a plurality of horizontal layers welded transversely and staggeredly on the inner wall of the furnace body, tube bodies are arranged in the channels on both sides of the plurality of horizontal layers, the bottommost tube body is connected with a discharge pipe, adjacent tube bodies are welded and connected with a connecting pipe, the connecting pipe is bolted with a temperature measuring thermocouple, a silo is welded at the top of the furnace body, an exhaust gas pipe is welded to the silo, the bottom of the silo is connected with the tube body, a connecting rod is arranged in the tube body, a hydraulic thruster is bolted to the end of the connecting rod, and a plurality of opening and closing structures are fixedly connected on both sides of the connecting rod.

[0006] The utility model is also characterized in that:

[0007] Several horizontal layers are staggered and arranged in the furnace cavity to form a Z-shaped channel.

[0008] The top and the bottom of the furnace cavity are provided with corresponding slots, and a plurality of columns are fixed in the slots. The columns vertically penetrate the horizontal layer, and the columns are arranged in two rows in parallel.

[0009] An electric grate plate is provided in the furnace body, and the position of the electric grate plate in the vertical direction is between the fuel ash discharge spiral and the fuel adding hole.

[0010] The electric grate plate is located between the two rows of columns along the horizontal direction.

[0011] The tail gas pipeline is connected to the flue gas dust collector through a normal pressure pipeline.

[0012] The fuel adding holes are located between the ash discharge spiral and the bottommost tube body.

[0013] An insulation layer is provided on the side of the pipe body away from the hydraulic thruster; a sealing cover is provided between the pipe body and the hydraulic thruster, and a plurality of supporting wheels are provided on the side of the pipe body close to the ash discharge spiral, each supporting wheel is located between two adjacent opening and closing structures.

[0014] The opening and closing structure includes a fixed plate, which is fixedly connected to the connecting rod. The two fixed plates are rotatably connected to a rotating shaft, and the fan blades are fixedly connected to the rotating shaft. A baffle is provided on one side of the fan blade, and the baffle is fixedly connected between the two fixed plates.

[0015] The temperature measuring couple is connected to the temperature controller through a wire; the hydraulic propeller is connected to the motor controller through a wire; the motor controller is also connected to the electric grate plate and the ash discharging spiral through a wire.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a space tube type reduction roasting furnace, which is provided with a plurality of thermal heating elements and temperature measuring couples. The temperature measuring couples monitor the temperature in real time and control the entire roasting furnace body through a control unit and power. The spatial distribution structure is utilized to lengthen the length of the roasting section, thereby achieving a roasting processing capacity far exceeding that of a rotary kiln of the same type, thereby improving industrial output. The circuitous high-temperature flue gas channel structure enables a more efficient heat exchange between minerals and thermal energy, thereby achieving a higher thermal efficiency and reducing the roasting fuel cost. The static roasting pipeline structure and operation mode reduce the equipment cost and solve the problems of low reduction rate and severe mineral oxidation in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the space tube type reduction roasting furnace of the utility model;

[0019] Figure 2 This is a top view of the space tube type reduction roasting furnace of the utility model;

[0020] Figure 3This is a schematic diagram of the opening and closing fan blades of the space tube type reduction roasting furnace of the utility model;

[0021] Figure 4 It is a schematic diagram of the closed state of the opening and closing fan blades of the space tube type reduction roasting furnace of the utility model.

[0022] In the figure: 1. Silo; 2. Exhaust gas duct; 3. Furnace body; 4. Hydraulic thruster; 5. Sealing cover; 6. Connecting rod; 7. Support wheel; 8. Opening and closing structure; 801. Fixed plate; 802. Rotating shaft; 803. Fan blade; 804. Baffle; 9. Pipe body; 10. Insulation layer; 11. Column; 12. Horizontal layer; 13. Connecting pipe; 14. Fuel addition hole; 15. Electric grate; 16. Discharge pipe; 17. Ash discharge spiral; 18. Flue gas dust collector; 19. Thermocouple; 20. Temperature controller; 21. Motor controller. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Space tube reduction roasting furnace, such as Figure 1 As shown, it includes a furnace body 3, an ash discharge spiral 17 is welded to the bottom of the furnace body 3, a number of fuel addition holes 14 are opened on the side wall of the bottom of the furnace body 3, a number of horizontal layers 12 are welded on the inner wall of the furnace body 3 in a horizontal and staggered manner, and pipe bodies 9 are provided in the channels on both sides of the number of horizontal layers 12. The bottommost pipe body is connected to the discharge pipe 16, and the adjacent pipe bodies 9 are welded and connected to the connecting pipe 13. The connecting pipe 13 is bolted to the temperature measuring couple 19, a silo 1 is welded to the top of the furnace body 3, and the silo 1 is welded to the exhaust pipe 2. The bottom of the silo 1 is connected to the pipe body 9, and a connecting rod 6 is provided in the pipe body 9. The end of the connecting rod 6 is bolted to the hydraulic thruster 4, and a number of opening and closing structures 8 are fixedly connected to both sides of the connecting rod 6.

[0025] Several horizontal layers 12 are staggered and arranged in the cavity of the furnace body 3 to form a Z-shaped channel. The top and bottom of the cavity of the furnace body 3 are provided with corresponding slots, such as Figure 2 As shown, several upright posts 11 are fixed in the slots. These posts 11 extend vertically through the horizontal layer 12 and are arranged in two parallel rows. A motorized grate 15 is installed within the furnace body 3. The motorized grate 15 is vertically positioned between the fuel ash discharge spiral 17 and the fuel addition port 14. Along the horizontal layer 12, the motorized grate 15 is positioned between the two rows of upright posts 11.

[0026] The exhaust pipe 2 is connected to a flue gas dust collector 18 via a normal pressure pipe. Several fuel injection holes 14 are located between the ash discharge spiral 17 and the bottommost tube body 9. An insulation layer 10 is provided on the side of the tube body 9 away from the hydraulic thruster 4. A sealing cover 5 is located between the tube body 9 and the hydraulic thruster 4. Several support rollers 7 are located inside the tube body 9 near the ash discharge spiral 17, each located between two adjacent opening and closing structures 8.

[0027] like Figure 3 、 4 As shown, the opening and closing structure 8 includes a fixed plate 801, which is fixedly connected to the connecting rod 6. The two fixed plates 801 are centrally connected to a rotating shaft 802, and a fan blade 803 is fixedly connected to the rotating shaft 802. A baffle 804 is provided on one side of the fan blade 803, and the baffle 804 is fixedly connected between the two fixed plates 801. The temperature measuring couple 19 is connected to the temperature controller 20 via a wire; the hydraulic thruster is connected to the motor controller 21 via a wire, and the motor controller 21 is also connected to the electric grate plate 15 and the ash discharge spiral 17 via wires.

[0028] During operation, fuel is added through the fuel adding hole (14), and then the fuel is ignited. The heat diffuses upward from the bottom, and the gaps between the horizontal layers (12) allow the heat to shuttle through and heat the entire space of the tubular reduction roasting furnace. The temperature measuring couple (19) set in the furnace can measure the temperature and the temperature controller (20) can be used to monitor and control the temperature in the furnace in real time. After the temperature reaches the specified temperature, roasting material is added from the hopper (1), and the motor controller (21) is started. The motor controller (21) drives the hydraulic propeller (4) to work, and the hydraulic propeller (4) drives the connecting rod (6) to reciprocate.

[0029] When the connecting rod 6 moves from the hydraulic propeller (4) side to the insulation layer (10) side, as shown in FIG. Figure 3 As shown, the opening and closing structure (8) on the connecting rod 6 is in the open state, and the mineral powder runs in the series-connected tube body (9) and simultaneously performs a reverse heat exchange operation, and finally the roasted material is discharged from the discharge pipe (16) connected to the bottom of the bottom tube body (9).

[0030] When the connecting rod 6 moves from the side of the insulation layer (10) to the side of the hydraulic thruster (4), Figure 4 As shown, the opening and closing structure (8) on the connecting rod 6 is in a closed state, which realizes the one-way transportation of the mineral powder, facilitates the addition of new mineral powder d, and improves the transportation efficiency. In addition, the utility model adds a column (11), which increases the internal strength and can support the pipe body (9) to prevent it from softening and deforming due to high temperature and weight. The flue gas after combustion enters the flue gas dust collector (18) through the exhaust pipe (2), reducing the harm of the flue gas to the environment during production operations.

[0031] Example 1

[0032] Space tube reduction roasting furnace, such as Figure 1As shown, it includes a furnace body 3, an ash discharge spiral 17 is welded to the bottom of the furnace body 3, a number of fuel addition holes 14 are opened on the side wall of the bottom of the furnace body 3, a number of horizontal layers 12 are welded on the inner wall of the furnace body 3 in a horizontal and staggered manner, and pipe bodies 9 are provided in the channels on both sides of the number of horizontal layers 12. The bottommost pipe body is connected to the discharge pipe 16, and the adjacent pipe bodies 9 are welded and connected to the connecting pipe 13. The connecting pipe 13 is bolted to the temperature measuring couple 19, a silo 1 is welded to the top of the furnace body 3, and the silo 1 is welded to the exhaust pipe 2. The bottom of the silo 1 is connected to the pipe body 9, and a connecting rod 6 is provided in the pipe body 9. The end of the connecting rod 6 is bolted to the hydraulic thruster 4, and a number of opening and closing structures 8 are fixedly connected to both sides of the connecting rod 6.

[0033] Several horizontal layers 12 are staggered and arranged in the cavity of the furnace body 3 to form a Z-shaped channel. The top and bottom of the cavity of the furnace body 3 are provided with corresponding slots, such as Figure 2 As shown, several upright posts 11 are fixed in the slots. These posts 11 extend vertically through the horizontal layer 12 and are arranged in two parallel rows. A motorized grate 15 is installed within the furnace body 3. The motorized grate 15 is vertically positioned between the fuel ash discharge spiral 17 and the fuel addition port 14. Along the horizontal layer 12, the motorized grate 15 is positioned between the two rows of upright posts 11.

[0034] Example 2

[0035] Space tube reduction roasting furnace, such as Figure 1 As shown, it includes a furnace body 3, an ash discharge spiral 17 is welded to the bottom of the furnace body 3, a number of fuel addition holes 14 are opened on the side wall of the bottom of the furnace body 3, a number of horizontal layers 12 are welded on the inner wall of the furnace body 3 in a horizontal and staggered manner, and pipe bodies 9 are provided in the channels on both sides of the number of horizontal layers 12. The bottommost pipe body is connected to the discharge pipe 16, and the adjacent pipe bodies 9 are welded and connected to the connecting pipe 13. The connecting pipe 13 is bolted to the temperature measuring couple 19, a silo 1 is welded to the top of the furnace body 3, and the silo 1 is welded to the exhaust pipe 2. The bottom of the silo 1 is connected to the pipe body 9, and a connecting rod 6 is provided in the pipe body 9. The end of the connecting rod 6 is bolted to the hydraulic thruster 4, and a number of opening and closing structures 8 are fixedly connected to both sides of the connecting rod 6.

[0036] Several horizontal layers 12 are staggered and arranged in the cavity of the furnace body 3 to form a Z-shaped channel. The top and bottom of the cavity of the furnace body 3 are provided with corresponding slots, such as Figure 2 As shown, several upright posts 11 are fixed in the slots. These posts 11 extend vertically through the horizontal layer 12 and are arranged in two parallel rows. A motorized grate 15 is installed within the furnace body 3. The motorized grate 15 is vertically positioned between the fuel ash discharge spiral 17 and the fuel addition port 14. Along the horizontal layer 12, the motorized grate 15 is positioned between the two rows of upright posts 11.

[0037] The exhaust pipe 2 is connected to a flue gas dust collector 18 via a normal pressure pipe. Several fuel injection holes 14 are located between the ash discharge spiral 17 and the bottommost tube body 9. An insulation layer 10 is provided on the side of the tube body 9 away from the hydraulic thruster 4. A sealing cover 5 is located between the tube body 9 and the hydraulic thruster 4. Several support rollers 7 are located inside the tube body 9 near the ash discharge spiral 17, each located between two adjacent opening and closing structures 8.

[0038] Example 3

[0039] Space tube reduction roasting furnace, such as Figure 1 As shown, it includes a furnace body 3, an ash discharge spiral 17 is welded to the bottom of the furnace body 3, a number of fuel addition holes 14 are opened on the side wall of the bottom of the furnace body 3, a number of horizontal layers 12 are welded on the inner wall of the furnace body 3 in a horizontal and staggered manner, and pipe bodies 9 are provided in the channels on both sides of the number of horizontal layers 12. The bottommost pipe body is connected to the discharge pipe 16, and the adjacent pipe bodies 9 are welded and connected to the connecting pipe 13. The connecting pipe 13 is bolted to the temperature measuring couple 19, a silo 1 is welded to the top of the furnace body 3, and the silo 1 is welded to the exhaust pipe 2. The bottom of the silo 1 is connected to the pipe body 9, and a connecting rod 6 is provided in the pipe body 9. The end of the connecting rod 6 is bolted to the hydraulic thruster 4, and a number of opening and closing structures 8 are fixedly connected to both sides of the connecting rod 6.

[0040] Several horizontal layers 12 are staggered and arranged in the cavity of the furnace body 3 to form a Z-shaped channel. The top and bottom of the cavity of the furnace body 3 are provided with corresponding slots, such as Figure 2 As shown, several upright posts 11 are fixed in the slots. These posts 11 extend vertically through the horizontal layer 12 and are arranged in two parallel rows. A motorized grate 15 is installed within the furnace body 3. The motorized grate 15 is vertically positioned between the fuel ash discharge spiral 17 and the fuel addition port 14. Along the horizontal layer 12, the motorized grate 15 is positioned between the two rows of upright posts 11.

[0041] The exhaust pipe 2 is connected to a flue gas dust collector 18 via a normal pressure pipe. Several fuel injection holes 14 are located between the ash discharge spiral 17 and the bottommost tube body 9. An insulation layer 10 is provided on the side of the tube body 9 away from the hydraulic thruster 4. A sealing cover 5 is located between the tube body 9 and the hydraulic thruster 4. Several support rollers 7 are located inside the tube body 9 near the ash discharge spiral 17, each located between two adjacent opening and closing structures 8.

[0042] like Figure 3 、 4As shown, the opening and closing structure 8 includes a fixed plate 801, which is fixedly connected to the connecting rod 6. The two fixed plates 801 are centrally connected to a rotating shaft 802, and a fan blade 803 is fixedly connected to the rotating shaft 802. A baffle 804 is provided on one side of the fan blade 803, and the baffle 804 is fixedly connected between the two fixed plates 801. The temperature measuring couple 19 is connected to the temperature controller 20 via a wire; the hydraulic thruster is connected to the motor controller 21 via a wire, and the motor controller 21 is also connected to the electric grate plate 15 and the ash discharge spiral 17 via wires.

Claims

1. Space tube reduction roasting furnace, characterized in that, The invention comprises a furnace body (3), wherein an ash discharge spiral (17) is welded at the bottom of the furnace body (3), a plurality of fuel addition holes (14) are opened on the side wall of the bottom of the furnace body (3), a plurality of transverse layers (12) are welded on the inner side wall of the furnace body (3), a plurality of tube bodies (9) are arranged in the channels on both sides of the plurality of transverse layers (12), the tube body at the bottom is connected to a discharge pipe (16), the adjacent tube bodies (9) are welded to a connecting pipe (13), the connecting pipe (13) is bolted to a temperature measuring thermocouple (19), a silo (1) is welded at the top of the furnace body (3), an exhaust gas pipe (2) is welded to the silo (1), the bottom of the silo (1) is connected to the tube body (9), a connecting rod (6) is arranged in the tube body (9), the end of the connecting rod (6) is bolted to a hydraulic thruster (4), and a plurality of opening and closing structures (8) are fixedly connected to both sides of the connecting rod (6).

2. The space tube type reduction roasting furnace according to claim 1, characterized in that: A plurality of the transverse layers (12) are staggeredly arranged in the cavity of the furnace body (3) to form a Z-shaped channel.

3. The space tube type reduction roasting furnace according to claim 1, characterized in that: The top and bottom of the cavity of the furnace body (3) are provided with corresponding slots, and a plurality of columns (11) are fixed in the slots. The columns (11) vertically penetrate the horizontal layer (12), and the columns (11) are arranged in two rows.

4. The space tube type reduction roasting furnace according to claim 3, characterized in that: An electric grate plate (15) is provided in the furnace body (3), and the electric grate plate (15) is located between the fuel ash discharge spiral (17) and the fuel addition hole (14) in the vertical direction.

5. The space tube type reduction roasting furnace according to claim 4, characterized in that: The electric grate plate (15) is located between two rows of upright posts (11) along the horizontal layer (12) direction.

6. The space tube type reduction roasting furnace according to claim 1, characterized in that: The tail gas pipeline (2) is connected to a flue gas dust collector (18) via a normal pressure pipeline.

7. The space tube type reduction roasting furnace according to claim 1, characterized in that: The plurality of fuel addition holes (14) are located between the ash discharge spiral (17) and the tube body (9) at the bottom.

8. The space tube type reduction roasting furnace according to claim 1, characterized in that: A heat-insulating layer (10) is provided on the side of the tube body (9) away from the hydraulic thruster (4); a sealing cover (5) is provided between the tube body (9) and the hydraulic thruster (4); and a plurality of supporting wheels (7) are provided on the side of the tube body (9) close to the ash discharge spiral (17), each supporting wheel (7) being located between two adjacent opening and closing structures (8).

9. The space tube type reduction roasting furnace according to claim 1, characterized in that: The opening and closing structure (8) comprises a fixed plate (801), the fixed plate (801) being fixedly connected to the connecting rod (6), the two fixed plates (801) being centrally rotatably connected to a rotating shaft (802), a fan blade (803) being fixedly connected to the rotating shaft (802), a baffle (804) being provided on one side of the fan blade (803), and the baffle (804) being fixedly connected between the two fixed plates (801).

10. The space tube type reduction roasting furnace according to claim 1, characterized in that: The temperature measuring couple (19) is connected to a temperature controller (20) via a wire; the hydraulic propeller is connected to a motor controller (21) via a wire; and the motor controller (21) is further connected to an electric grate plate (15) and an ash discharge spiral (17) via a wire.

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