A rotary reduction furnace for the production of high-purity tungsten powder

Abstract

The present invention relates to a reduction furnace, and in particular to a rotary reduction furnace for the production of high-purity tungsten powder. It is necessary to design a rotary reduction furnace for the production of high-purity tungsten powder that can carry a large amount of raw materials for production and reduce tungsten powder with high purity. A rotary reduction furnace for the production of high-purity tungsten powder includes a positioning bottom box, a supporting bottom frame, a sealing cover plate and an air intake pipe. The bottom of the positioning bottom box is fixedly connected to the supporting bottom frame, the front middle of the positioning bottom box is rotatably connected to the sealing cover plate, and the left middle of the positioning bottom box is connected to the air intake pipe. The present invention pours an appropriate amount of tungsten powder into a heating drum, loosens the baffle plate to seal the heating drum, starts the servo motor, reverses the heating drum to make the tungsten powder start to roll, and then hydrogen is discharged into the heating drum to react with the tungsten powder, so that the tungsten powder is produced and reduced to a higher purity. In this way, a large amount of raw materials can be carried for production, and the reduced tungsten powder is high in purity.

Description

Technical Field

[0001] The invention relates to a reduction furnace, in particular to a rotary reduction furnace used for producing high-purity tungsten powder. Background Art

[0002] Tungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys, and is an important industrial raw material. At present, most people use the hydrogen reduction method to prepare high-purity tungsten powder.

[0003] Patent application CN204373394U discloses a tungsten powder reduction furnace, including a furnace shell, a furnace tube, an electric heating wire, and a thermocouple. It is characterized in that the furnace chamber in the furnace shell is composed of furnace wall bricks and upper furnace wire bricks and lower furnace wire bricks on both sides. The upper furnace wire bricks and the lower furnace wire bricks are respectively connected with electric heating wires. The furnace tubes are evenly arranged and staggered in the furnace chamber. The furnace chamber is supported by three or more rows of load-bearing insulation bricks. Aluminum silicate insulation cotton is filled between the furnace chamber and the furnace shell, between the load-bearing insulation bricks and the furnace shell, and between the load-bearing insulation bricks. The tungsten powder reduction furnace of the present invention adopts a new layout structure and uses aluminum silicate insulation cotton instead of lightweight insulation bricks, so that the thermal efficiency of the furnace can be increased by 25-30%, the service life of the heating element is extended, thereby reducing the production cost of tungsten powder reduction, and the quality of the products produced is better and more stable. Although the above patent can reduce tungsten powder, the equipment has a small raw material carrying capacity and is not suitable for large-scale industrial production, and the purity of the reduced tungsten powder is low.

[0004] Based on the defects in the above patents, we propose a rotary reduction furnace for the production of high-purity tungsten powder, which can carry a large amount of raw materials for production and reduce tungsten powder with high purity. Summary of the invention

[0005] In order to overcome the shortcomings of the equipment having a small raw material carrying capacity, being unsuitable for large-scale industrial production, and having low purity of reduced tungsten powder, the present invention provides a rotary reduction furnace for producing high-purity tungsten powder that can carry a large amount of raw materials for production and has high purity of reduced tungsten powder.

[0006] The technical solution of the present invention is:

[0007] A rotary reduction furnace for producing high-purity tungsten powder comprises a positioning bottom box, a supporting bottom frame, a sealing cover plate, an air inlet pipe, an air outlet pipe, a heating drum, a driving mechanism and a material blocking mechanism. The supporting bottom frame is fixedly connected to the bottom of the positioning bottom box, the sealing cover plate is rotatably connected to the middle of the front of the positioning bottom box, the air inlet pipe is connected to the middle of the left part of the positioning bottom box, the air outlet pipe is rotatably connected to the middle of the right part of the positioning bottom box, a heating drum is rotatably connected between the air inlet pipe and the air outlet pipe, a driving mechanism for providing power is connected between the positioning bottom box and the heating drum, and a material blocking mechanism for sealing is connected to the heating drum.

[0008] Furthermore, the driving mechanism includes a servo motor, a driving shaft, a driving gear and a first driven gear. The servo motor is connected to the middle and rear part of the left side of the positioning bottom box by bolt connection. The driving shaft is connected to the output shaft of the servo motor. The driving gear is fixed to the right part of the driving shaft, and the first driven gear is fixed to the left part of the heating drum.

[0009] Furthermore, the material blocking mechanism includes a material blocking plate, a positioning soft rope, a movable slider, a positioning spring and a fixed base. The front of the heating drum is rotatably connected to the material blocking plate, the upper rear side of the heating drum is symmetrically embedded with a fixed base, the left and right fixed bases are slidably connected to the movable sliders, the front side surfaces of the left and right movable sliders are respectively connected to the inner side surfaces of the left and right fixed bases with positioning springs, the left and right movable sliders are connected to positioning soft ropes, and the left and right positioning soft ropes are fixedly connected to the material blocking plate.

[0010] Furthermore, it also includes a power recovery mechanism for reducing the output power of the servo motor, the power recovery mechanism includes an exhaust duct, a bevel gear disc, a reversing bevel gear, a fixed bottom cover, a driven impeller and a transmission vertical shaft, the exhaust duct is connected to the exhaust pipe by bolt connection, the exhaust duct is fixedly connected to the positioning bottom box, a bevel gear disc is fixedly connected to the right side of the outer side of the heating drum, a fixed bottom cover is fixedly connected to the upper middle position of the right part of the positioning bottom box, the fixed bottom cover is connected to the exhaust duct, a transmission vertical shaft is rotatably connected in the fixed bottom cover, a reversing bevel gear is fixedly connected to the bottom end of the transmission vertical shaft, the reversing bevel gear is meshed with the bevel gear disc, a driven impeller is fixedly connected to the upper part of the transmission vertical shaft, and the driven impeller is located in the fixed bottom cover.

[0011] Furthermore, it also includes a positioning mechanism for limiting the material baffle plate, the positioning mechanism includes an electromagnetic guide rail, a positioning cross bar, a fixed short seat, a return spring, a positioning sliding seat and a positioning roller, the electromagnetic guide rails are fixedly connected to the left and right sides of the positioning bottom box, the fixed short seats are symmetrically fixed to the top wall of the heating drum, the lower parts of the left and right fixed short seats are slidably connected to the positioning cross bars for limiting the material baffle plate, the left and right positioning cross bars both pass through the rear of the heating drum, the left and right positioning cross bars are slidably connected to the heating drum, the rear parts of the left and right positioning cross bars are rotatably connected to the positioning rollers, the outer rear wall of the heating drum is respectively connected to the rear parts of the left and right positioning cross bars, the left and right electromagnetic guide rails are slidably connected to the positioning sliding seats, and the left and right positioning rollers can be reversed to contact the left and right positioning sliding seats.

[0012] Furthermore, it also includes a turning mechanism for further turning the tungsten powder, the turning mechanism includes a fixed outer gear ring, a turning roller, a fixed horizontal axis, a connecting short frame, a second driven gear, a fixed sleeve and a buffer spring, the right part of the air inlet pipe and the left part of the air outlet pipe are fixedly connected with a fixed outer gear ring, the rear parts of the left and right positioning cross bars are fixedly connected with fixed sleeves, the left and right fixed sleeves are slidably connected with connecting short frames, the top ends of the left and right connecting short frames are respectively connected to the insides of the left and right fixed sleeves with buffer springs, the lower parts of the left and right connecting short frames are rotatably connected, the middle part of the fixed horizontal axis is fixedly connected with a turning roller for further turning the tungsten powder, the left and right sides of the fixed horizontal axis are fixedly connected with second driven gears, the left and right second driven gears can move inwards to engage with the fixed outer gear rings on the left and right sides respectively.

[0013] Furthermore, it also includes a dustproof mechanism for dust-proof protection of the heating drum, the dustproof mechanism includes a dust cover and a positioning vane, the dust cover is connected to the right side of the top of the positioning bottom box by bolt connection, the dust cover is connected to the exhaust duct, and three positioning vanes for dust protection are rotatably connected to the upper part of the dust cover at intervals.

[0014] Furthermore, a handle is included, and the handle is fixedly connected to the lower part of the sealing cover plate.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention pours an appropriate amount of tungsten powder into the heating drum, loosens the baffle plate to seal the heating drum, starts the servo motor, reverses the heating drum to make the tungsten powder start to roll, and then discharges hydrogen into the heating drum to react with the tungsten powder, so that the tungsten powder is reduced to a higher purity. In this way, a large amount of raw materials can be carried for production, and the purity of the reduced tungsten powder is high.

[0017] 2. Under the action of the material turning mechanism of the present invention, the fixed horizontal axis rotates to drive the turning roller to rotate, and the turning roller rotates to further turn the tungsten powder. In this way, the tungsten powder can be further turned to avoid tungsten powder agglomeration.

[0018] 3. Under the action of the dust-proof mechanism of the present invention, the positioning blade rotates and resets to a horizontal state, thereby preventing dust from entering the heating drum through the exhaust duct. In this way, dust can be prevented from entering the heating drum and affecting subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of a first partial cross-sectional structure of the present invention.

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the driving mechanism of the present invention.

[0022] Figure 4 It is a partial cross-sectional structural schematic diagram of the material blocking mechanism of the present invention.

[0023] Figure 5 It is an enlarged schematic diagram of part A of the present invention.

[0024] Figure 6 It is a schematic diagram of a second partial cross-sectional structure of the present invention.

[0025] Figure 7 It is a schematic diagram of a first partial cross-sectional structure of the power recovery mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of a second partial cross-sectional structure of the power recovery mechanism of the present invention.

[0027] Fig. 9 It is a schematic diagram of a first partial cross-sectional structure of the positioning mechanism of the present invention.

[0028] Fig.10 It is a schematic diagram of a second partial cross-sectional structure of the positioning mechanism of the present invention.

[0029] Fig.11 It is a schematic diagram of a third partial cross-sectional structure of the positioning mechanism of the present invention.

[0030] Fig.12 It is a schematic diagram of a third partial cross-sectional structure of the present invention.

[0031] Fig.13 It is a schematic diagram of a first partial cross-sectional structure of the material turning mechanism of the present invention.

[0032] Fig.14 It is an enlarged schematic diagram of part B of the present invention.

[0033] Fig.15 It is a schematic diagram of a second partial cross-sectional structure of the material turning mechanism of the present invention.

[0034] Fig.16 It is a partial cross-sectional structural schematic diagram of the dustproof mechanism of the present invention.

[0035] Figure numbers: 1_positioning bottom box, 2_supporting bottom frame, 3_sealing cover plate, 31_handle, 4_inlet pipe, 5_outlet pipe, 6_heating drum, 7_driving mechanism, 71_servo motor, 72_driving shaft, 73_driving gear, 74_first driven gear, 8_material blocking mechanism, 81_material blocking plate, 82_positioning soft rope, 83_movable slider, 84_positioning spring, 85_fixed base, 9_power recovery mechanism, 91_exhaust duct, 92_bevel gear disc, 93_reversing bevel gear, 94_fixed bottom cover , 95_driven impeller, 96_transmission vertical shaft, 10_positioning mechanism, 101_electromagnetic guide rail, 102_positioning cross bar, 103_fixed short seat, 104_reset spring, 105_positioning sliding seat, 106_positioning roller, 11_turning mechanism, 111_fixed outer gear ring, 112_turning roller, 113_fixed horizontal shaft, 114_connecting short frame, 115_second driven gear, 116_fixed sleeve plate, 117_buffer spring, 12_dustproof mechanism, 121_dust cover, 122_positioning blade plate. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0037] A rotary reduction furnace for the production of high purity tungsten powder, such as Figure 1-Figure 5 As shown, it includes a positioning bottom box 1, a supporting bottom frame 2, a sealing cover plate 3, an air inlet pipe 4, an air outlet pipe 5, a heating drum 6, a driving mechanism 7 and a material blocking mechanism 8. The supporting bottom frame 2 is fixedly connected to the bottom of the positioning bottom box 1, the sealing cover plate 3 is rotatably connected to the middle of the front of the positioning bottom box 1, the air inlet pipe 4 is connected to the middle of the left part of the positioning bottom box 1, the air outlet pipe 5 is rotatably connected to the middle of the right part of the positioning bottom box 1, the heating drum 6 is rotatably connected between the air inlet pipe 4 and the air outlet pipe 5, the driving mechanism 7 is connected between the positioning bottom box 1 and the heating drum 6, the driving mechanism 7 can provide power to drive the heating drum 6 to rotate, the heating drum 6 is connected with the material blocking mechanism 8, and the material blocking mechanism 8 can seal the heating drum 6.

[0038] like Figure 1 As shown, a handle 31 is also included, and the handle 31 is fixedly connected to the lower part of the sealing cover plate 3.

[0039] like Figure 2 and Figure 3 As shown, the driving mechanism 7 includes a servo motor 71, a driving shaft 72, a driving gear 73 and a first driven gear 74. The servo motor 71 is connected to the middle and rear portion of the left side of the positioning bottom box 1 by bolt connection. The driving shaft 72 is connected to the output shaft of the servo motor 71. The driving gear 73 is fixedly connected to the right portion of the driving shaft 72. The first driven gear 74 is fixedly connected to the left portion of the heating drum 6.

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, the material blocking mechanism 8 includes a material blocking plate 81, a positioning soft rope 82, a movable slider 83, a positioning spring 84 and a fixed base 85. The front portion of the heating drum 6 is rotatably connected to the material blocking plate 81, and the upper rear portion of the heating drum 6 is symmetrically embedded with a fixed base 85. The fixed bases 85 on both sides are slidably connected to the movable sliders 83. Positioning springs 84 are connected between the front side surfaces of the movable sliders 83 on both sides and the inner side surfaces of the fixed bases 85 on both sides respectively. Positioning soft ropes 82 are connected to the movable sliders 83 on both sides, and the positioning soft ropes 82 on both sides are fixedly connected to the material blocking plate 81.

[0041] First, the operator connects the air intake pipe 4 to the external pipeline, then opens the sealing cover 3 through the handle 31, and then pulls the baffle plate 81 to swing backward. The baffle plate 81 swings backward and drives the left and right movable sliders 83 to move forward through the left and right positioning soft ropes 82 respectively. The left and right positioning springs 84 are compressed. Then, an appropriate amount of tungsten powder is poured into the heating drum 6, and the baffle plate 81 is loosened. Due to the action of the left and right positioning springs 84, the left and right movable sliders 83 drive the baffle plate 81 to swing forward and reset through the left and right positioning soft ropes 82 respectively. The baffle plate 81 swings forward to seal the heating drum 6, and then the sealing cover 3 is closed, and the servo motor 71 is started. The servo motor 71 drives the drive shaft 72 to rotate forward, and the drive shaft 72 rotates forward to drive the drive The gear 73 rotates forward, and the driving gear 73 rotates forward to drive the first driven gear 74 to reverse, and the first driven gear 74 reverses to drive the heating drum 6 to reverse. The reversal of the heating drum 6 causes the tungsten powder to begin to tumble, and then the pretreated hydrogen is discharged into the heating drum 6 through the air inlet pipe 4. The hydrogen reacts with the tungsten powder, thereby reducing the tungsten powder to a higher purity, and the hydrogen is discharged through the air outlet pipe 5. This is repeated to continuously reduce the tungsten powder. After all the tungsten powder is reduced, the servo motor 71 is turned off, and the driving shaft 72 stops driving the first driven gear 74 through the driving gear 73. The heating drum 6 also stops reversing, and at the same time stops discharging the pretreated hydrogen into the heating drum 6, and stops taking out the tungsten powder according to the above operation for subsequent processing. Example 2

[0042] On the basis of Example 1, Figure 6-Figure 8As shown, it also includes a power recovery mechanism 9, which includes an exhaust duct 91, a bevel gear disc 92, a reversing bevel gear 93, a fixed bottom cover 94, a driven impeller 95 and a transmission vertical shaft 96. The exhaust duct 91 is connected to the exhaust pipe 5 by bolt connection, and the exhaust duct 91 is fixedly connected to the positioning bottom box 1. A bevel gear disc 92 is fixedly connected to the right side of the heating drum 6. A fixed bottom cover 94 is fixedly connected to the upper middle position of the right part of the positioning bottom box 1. The fixed bottom cover 94 is connected to the exhaust duct 91. A transmission vertical shaft 96 is rotatably connected in the fixed bottom cover 94. The reversing bevel gear 93 is fixedly connected to the bottom end of the transmission vertical shaft 96. The reversing bevel gear 93 is meshed with the bevel gear disc 92. A driven impeller 95 is fixedly connected to the upper part of the transmission vertical shaft 96, and the driven impeller 95 is located in the fixed bottom cover 94.

[0043] like Figure 6 , Fig. 9 , Fig.10 and Fig.11 As shown, it also includes a positioning mechanism 10, which includes an electromagnetic guide rail 101, a positioning cross bar 102, a fixed short seat 103, a reset spring 104, a positioning sliding seat 105 and a positioning roller 106. The electromagnetic guide rails 101 are fixedly connected to the left and right sides of the positioning bottom box 1, and the fixed short seats 103 are fixedly connected to the top wall of the heating drum 6 symmetrically on the left and right sides. The lower parts of the fixed short seats 103 on the left and right sides are slidably connected with the positioning cross bar 102. The positioning cross bar 102 can limit the baffle plate 81. The right side positioning cross bars 102 both pass through the rear part of the heating drum 6, the left and right side positioning cross bars 102 are both slidably connected to the heating drum 6, the rear parts of the left and right side positioning cross bars 102 are rotatably connected with positioning rollers 106, and the outer rear walls of the heating drum 6 are respectively connected to the rear parts of the left and right side positioning cross bars 102 with return springs 104, and the left and right side electromagnetic guide rails 101 are slidably connected with positioning sliding seats 105, and the left and right side positioning rollers 106 can be reversed to contact the left and right side positioning sliding seats 105 respectively.

[0044] like Figure 12-Figure 15As shown, it also includes a turning mechanism 11, which includes a fixed outer gear ring 111, a turning roller 112, a fixed horizontal shaft 113, a connecting short frame 114, a second driven gear 115, a fixed sleeve 116 and a buffer spring 117. The right part of the intake pipe 4 and the left part of the outlet pipe 5 are fixedly connected to the fixed outer gear ring 111, the rear parts of the positioning cross bars 102 on the left and right sides are fixedly connected to the fixed sleeves 116, and the connecting short frames 114 are slidably connected in the fixed sleeves 116 on the left and right sides. A buffer spring 117 is connected between the top of the short connecting frame 114 and the inside of the fixed sleeve plates 116 on the left and right sides respectively. A fixed horizontal shaft 113 is rotatably connected between the lower parts of the short connecting frames 114 on the left and right sides. A turning roller 112 is fixedly connected to the middle of the fixed horizontal shaft 113. The turning roller 112 can further turn the tungsten powder. Second driven gears 115 are fixedly connected to the left and right sides of the fixed horizontal shaft 113. The second driven gears 115 on the left and right sides can move inwards to engage with the fixed outer gear rings 111 on the left and right sides respectively.

[0045] When the pretreated hydrogen is discharged into the heating drum 6, the hydrogen reacts with the tungsten powder, thereby changing the tungsten powder production into a higher purity, and then the hydrogen is discharged through the outlet pipe 5 and the exhaust duct 91, and the hydrogen blows the driven impeller 95 to reverse, and the reverse rotation of the driven impeller 95 drives the transmission vertical shaft 96 to reverse, and the reverse rotation of the transmission vertical shaft 96 drives the reversing bevel gear 93 to reverse, and the reversing of the reversing bevel gear 93 drives the bevel gear disc 92 to reverse, and the reversal of the bevel gear disc 92 drives the heating drum 6 to reverse, thereby reducing the output power of the servo motor 71. After all the tungsten powder is reduced, stop discharging the pretreated hydrogen into the heating drum 6, and the hydrogen is no longer discharged through the outlet pipe 5 and the exhaust duct 91, and the driven impeller 95 stops driving the reversing bevel gear 93 to reverse through the transmission vertical shaft 96, and the heating drum 6 also stops reversing, thus reducing the output power of the servo motor 71.

[0046] When the servo motor 71 is working, the reversal of the heating drum 6 drives the reversal of the left and right positioning cross bars 102, and the reversal of the left and right positioning cross bars 102 drives the left and right positioning rollers 106 to reverse respectively. The reversal of the left and right positioning rollers 106 contacts the left and right positioning sliding seats 105 respectively, and the left and right positioning sliding seats 105 respectively make the left and right positioning rollers 106 move inwards a certain distance. The inward movement of the left and right positioning rollers 106 drives the left and right positioning cross bars 102 to move inwards respectively, and the left and right reset springs 104 are compressed. The inward movement of the left and right positioning cross bars 102 supports and limits the baffle plate 81 After that, the left and right positioning rollers 106 continue to reverse and respectively drive the left and right positioning sliding seats 105 to reverse, and the left and right positioning sliding seats 105 reverse and slide in the left and right electromagnetic guide rails 101 respectively. After all the tungsten powder is restored, the servo motor 71 is turned off, and the heating drum 6 stops driving the left and right positioning cross bars 102 to reverse. Due to the action of the left and right reset springs 104, the left and right positioning cross bars 102 respectively drive the left and right positioning rollers 106 to move outward and reset, and the left and right positioning cross bars 102 move outward and stop limiting the material baffle plate 81. In this way, the material baffle plate 81 can be further limited to increase the sealing effect.

[0047] When the servo motor 71 is working, the left and right positioning cross bars 102 move inwards and respectively drive the left and right fixed sleeves 116 to move inwards, the left and right fixed sleeves 116 move inwards and respectively drive the left and right connecting short frames 114 to move inwards, the left and right connecting short frames 114 move inwards and both drive the fixed horizontal shaft 113 to move inwards, the left and right buffer springs 117 respectively buffer the left and right connecting short frames 114, the fixed horizontal shaft 113 moves inwards and both drives the left and right second driven gears 115 to move inwards, the left and right second driven gears 115 move inwards and respectively mesh with the left and right fixed outer gear rings 111, at the same time, the left and right positioning cross bars 102 reverse and respectively drive the left and right fixed sleeves 116 to reverse, the left and right fixed sleeves 116 reverse and drive the left and right connecting short frames 114 to reverse, The reversal of the left and right connecting short frames 114 drives the fixed horizontal shaft 113 to reverse, and the reversal of the fixed horizontal shaft 113 drives the second driven gears 115 on the left and right sides to reverse, and the reversal of the second driven gears 115 on the left and right sides respectively starts to rotate through the fixed outer gear rings 111 on the left and right sides, and the rotation of the second driven gears 115 on the left and right sides drives the fixed horizontal shaft 113 to rotate, and the rotation of the fixed horizontal shaft 113 drives the turning roller 112 to rotate, and the rotation of the turning roller 112 further turns the tungsten powder. After all the tungsten powder is restored, the servo motor 71 is turned off, and the positioning cross bars 102 on the left and right sides respectively drive the fixed sleeve plates 116 on the left and right sides to move outward and reset, and the second driven gears 115 on the left and right sides are respectively disengaged from the fixed outer gear rings 111 on the left and right sides, and the turning roller 112 stops rotating. In this way, the tungsten powder can be further turned to avoid tungsten powder agglomeration. Example 3

[0048] On the basis of Example 1 and Example 2, Fig.12 and Fig.16 As shown, it also includes a dustproof mechanism 12, which includes a dust cover 121 and a positioning vane 122. The dust cover 121 is connected to the right side of the top of the positioning bottom box 1 by bolt connection. The dust cover 121 is connected to the exhaust duct 91. Three positioning vanes 122 are rotatably connected to the upper part of the dust cover 121 at intervals. The positioning vanes 122 can prevent dust from entering the heating drum 6.

[0049] When hydrogen is discharged through the exhaust duct 91, the hydrogen blows the positioning blade 122 to rotate to a vertical state. Similarly, after all the tungsten powder is reduced, hydrogen is no longer discharged. Due to the action of gravity, the positioning blade 122 rotates and returns to a horizontal state, thereby preventing dust from entering the heating drum 6 through the exhaust duct 91. In this way, dust can be prevented from entering the heating drum 6 and affecting subsequent use.

[0050] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A rotary reduction furnace for producing high-purity tungsten powder, comprising a positioning bottom box (1), a supporting bottom frame (2), a sealing cover plate (3), an air inlet pipe (4), an air outlet pipe (5) and a heating drum (6), wherein the bottom of the positioning bottom box (1) is fixedly connected to the supporting bottom frame (2), the sealing cover plate (3) is rotatably connected to the middle of the front of the positioning bottom box (1), the middle of the left part of the positioning bottom box (1) is connected to the air inlet pipe (4), the middle of the right part of the positioning bottom box (1) is rotatably connected to the air outlet pipe (5), and the heating drum (6) is rotatably connected between the air inlet pipe (4) and the air outlet pipe (5), characterized in that: It also includes a driving mechanism (7) and a material blocking mechanism (8); the driving mechanism (7) for providing power is connected between the positioning bottom box (1) and the heating drum (6); and the material blocking mechanism (8) for sealing is connected to the heating drum (6); The material blocking mechanism (8) comprises a material blocking plate (81), a positioning soft rope (82), a movable slider (83), a positioning spring (84) and a fixed base (85); the front of the heating drum (6) is rotatably connected to the material blocking plate (81); the upper rear side of the heating drum (6) is symmetrically embedded with the fixed base (85); the fixed bases (85) on both sides are slidably connected to the movable sliders (83); the front side surfaces of the movable sliders (83) on both sides are respectively connected to the inner side surfaces of the fixed bases (85) on both sides; the movable sliders (83) on both sides are connected to the positioning soft ropes (82); and the positioning soft ropes (82) on both sides are fixedly connected to the material blocking plate (81).

2. A rotary reduction furnace for producing high-purity tungsten powder according to claim 1, characterized in that: The driving mechanism (7) comprises a servo motor (71), a driving shaft (72), a driving gear (73) and a first driven gear (74); the servo motor (71) is connected to the middle rear portion of the left side of the positioning bottom box (1) by bolt connection; the driving shaft (72) is connected to the output shaft of the servo motor (71); the driving gear (73) is fixedly connected to the right portion of the driving shaft (72); and the first driven gear (74) is fixedly connected to the left portion of the heating drum (6).

3. The rotary reduction furnace for producing high-purity tungsten powder according to claim 2, characterized in that: The invention also includes a power recovery mechanism (9) for reducing the output power of the servo motor (71). The power recovery mechanism (9) includes an exhaust duct (91), a bevel gear disc (92), a reversing bevel gear (93), a fixed bottom cover (94), a driven impeller (95) and a transmission vertical shaft (96). The exhaust duct (91) is connected to the exhaust pipe (5) by bolt connection. The exhaust duct (91) is fixedly connected to the positioning bottom box (1). The outer right side of the heating drum (6) is fixedly connected to a bevel gear disc (92). The disk (92) is fixedly connected to a fixed bottom cover (94) at the middle upper side of the right part of the positioning bottom box (1), the fixed bottom cover (94) is communicated with the exhaust duct (91), a transmission vertical shaft (96) is rotatably connected inside the fixed bottom cover (94), a reversing bevel gear (93) is fixedly connected to the bottom end of the transmission vertical shaft (96), the reversing bevel gear (93) is meshed with the bevel gear disk (92), a driven impeller (95) is fixedly connected to the upper part of the transmission vertical shaft (96), and the driven impeller (95) is located inside the fixed bottom cover (94).

4. A rotary reduction furnace for producing high-purity tungsten powder according to claim 3, characterized in that: The device also includes a positioning mechanism (10) for limiting the position of the baffle plate (81). The positioning mechanism (10) includes an electromagnetic guide rail (101), a positioning cross bar (102), a fixed short seat (103), a return spring (104), a positioning sliding seat (105) and a positioning roller (106). The electromagnetic guide rails (101) are fixedly connected to the left and right sides of the positioning bottom box (1). The fixed short seats (103) are fixedly connected to the top wall of the heating drum (6) in a symmetrical manner. The lower parts of the fixed short seats (103) on the left and right sides are slidably connected to the positioning cross bars (102) for limiting the position of the baffle plate (81). The left and right positioning cross bars (102) both pass through the rear part of the heating drum (6), the left and right positioning cross bars (102) are both slidably connected to the heating drum (6), the rear parts of the left and right positioning cross bars (102) are rotatably connected to positioning rollers (106), the outer rear wall of the heating drum (6) and the rear parts of the left and right positioning cross bars (102) are respectively connected to return springs (104), the left and right electromagnetic guide rails (101) are both slidably connected to positioning sliding seats (105), and the left and right positioning rollers (106) can be reversed to contact the left and right positioning sliding seats (105).

5. The rotary reduction furnace for producing high-purity tungsten powder according to claim 4, characterized in that: The invention also includes a material turning mechanism (11) for further turning the tungsten powder. The material turning mechanism (11) includes a fixed outer gear ring (111), a material turning roller (112), a fixed horizontal shaft (113), a connecting short frame (114), a second driven gear (115), a fixed sleeve (116) and a buffer spring (117). The right part of the air inlet pipe (4) and the left part of the air outlet pipe (5) are both fixedly connected to the fixed outer gear ring (111). The rear parts of the positioning cross bars (102) on the left and right sides are both fixedly connected to the fixed sleeves (116). The fixed sleeves (116) on the left and right sides are both slidably connected to the connecting member. A short frame (114), a buffer spring (117) is connected between the top of the left and right short frames (114) and the inside of the left and right fixed sleeve plates (116), a fixed horizontal shaft (113) is rotatably connected between the lower parts of the left and right short frames (114), a turning roller (112) for further turning the tungsten powder is fixedly connected to the middle of the fixed horizontal shaft (113), and a second driven gear (115) is fixedly connected to the left and right sides of the fixed horizontal shaft (113), and the second driven gears (115) on the left and right sides can respectively mesh with the fixed outer gear rings (111) on the left and right sides when they move inward.

6. The rotary reduction furnace for producing high-purity tungsten powder according to claim 5, characterized in that: The invention also includes a dustproof mechanism (12) for protecting the heating drum (6) from dust. The dustproof mechanism (12) includes a dust cover (121) and a positioning blade (122). The dust cover (121) is connected to the right side of the top of the positioning bottom box (1) by bolt connection. The dust cover (121) is connected to the exhaust duct (91). Three positioning blades (122) for dust protection are rotatably connected to the upper part of the dust cover (121) at intervals.

7. The rotary reduction furnace for producing high-purity tungsten powder according to claim 6, characterized in that: It also includes a handle (31), and the handle (31) is fixedly connected to the lower part of the sealing cover plate (3).

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