Rotary tube furnace for tungsten powder reduction with a metered charging structure
The rotary kiln with a metered feeding structure addresses the issue of imprecise feed rates by using weighing sensors and separating plates to ensure accurate metering, improving tungsten powder purity and particle size stability.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- GANZHOU BOLI TECH CO LTD
- Filing Date
- 2026-01-14
- Publication Date
- 2026-05-07
AI Technical Summary
The manual addition of starting material to rotary kilns for tungsten powder reduction results in imprecise feed rates, leading to overdosing and stoichiometric imbalances, which negatively impact the purity and particle size stability of the tungsten powder.
A rotary kiln with a metered feeding structure that includes weighing sensors and rotatable separating plates to precisely control the feed rate, ensuring accurate metering and separation of excess material.
Achieves precise metering of starting materials, reducing raw material waste and maintaining stoichiometric equilibrium, thereby stabilizing tungsten powder purity and particle size, and enhancing production efficiency.
Smart Images
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Abstract
Description
Technical area
[0001] The present utility model relates to the technical field of tungsten powder processing plants, in particular a rotary tube furnace for tungsten powder reduction with a metered feeding structure. State of the art
[0002] The rotary kiln for tungsten powder reduction is a key piece of equipment for the production of metallic tungsten powder. Its primary function is to convert precursor materials such as ammonium paratungstate (APT) into high-purity tungsten powder via hydrogen reduction. The kiln body is an inclined cylinder that rotates to ensure uniform heating of the material. Together with the heating system for precise temperature control, this enables staged reduction processes (e.g., deammonization, depth reduction). Its advantages include high throughput capacity, high thermal efficiency, uniform and controllable product particle size, and good sealing, which minimizes the introduction of foreign matter. The rotary kiln is suitable for the demands of large-scale production and is a core component of tungsten metallurgy.
[0003] Currently, the addition of the starting material to the rotary kiln for tungsten powder reduction is still done manually: The powder is fed into a screw conveyor, and the transport is controlled by switching the conveyor on and off. However, since the screw conveyor is inherently a volumetric conveying device, it is difficult to precisely meter the feed rate per revolution at a fixed speed and angle of inclination. It can only be roughly controlled by the number of on / off cycles, which easily leads to an excessive feed rate per cycle. Such overdosing not only wastes raw material but also disrupts the stoichiometric equilibrium of the reduction reaction, negatively impacting the purity and particle size stability of the tungsten powder. Content of the utility model
[0004] The purpose of this utility model is to provide a rotary kiln for tungsten powder reduction with a metered feeding system. The inclusion of a metering component solves the problem of the prior art, in which the feed material is manually filled into the screw conveyor and its conveying is controlled solely by switching the screw conveyor on and off. However, the feed rate cannot be precisely controlled during transport of the material through the screw conveyor, which easily leads to overdosing.
[0005] The technical solution of the present utility model is as follows: A rotary kiln for tungsten powder reduction with a metered feeding structure comprises a support frame, wherein a furnace body is installed inside the support frame, a feeding tube is connected to one side of the furnace body, and a first screw conveyor is installed inside the feeding tube. A weighing component is arranged on one side of the feeding tube, comprising a material distribution tube connected to one side of the feeding tube, two weighing sensors installed inside the material distribution tube, a support seat installed on the top of one weighing sensor and a fixing seat installed on the top of the other weighing sensor, a fixing tube installed on the top of the support seat, and a weighing housing installed on one side of the fixing tube.A metering component is further arranged on one side of the weighing housing. The metering component comprises a rotary axis movably connected inside the weighing housing, a first separating plate and a second separating plate installed on the surface of the rotary axis, as well as a discharge opening and a material distribution opening formed on the surface of the weighing housing.
[0006] Preferably, the dosing component further comprises a drive motor installed on the top of the fixing seat, a rotary plate installed on the surface of the rotary axis, and a cover installed on one side of the rotary plate.
[0007] Preferably, the output end of the drive motor is fixedly connected to the axis of rotation and the fixing tube is movably connected to the inner wall of the cover via a bearing.
[0008] Preferably, an inclined plate is arranged on the underside of the material distribution opening, a collection box is arranged on the underside of the inclined plate, and a fixing housing is arranged on the underside of the collection box.
[0009] Preferably, one side of the fixing housing is firmly connected to the inner wall of the material distribution pipe, and both sides of the inclined plate are each firmly connected to the inner wall of the material distribution pipe.
[0010] Preferably, a feed opening is formed on the top of the weighing housing, a guide tube is arranged on the top of the feed opening, a second screw conveyor is arranged on the top of the guide tube, and a storage housing is connected to the top of the second screw conveyor.
[0011] Preferably, a bracket is firmly attached to one side of the second screw conveyor and the other side of the bracket is firmly attached to the material distribution pipe.
[0012] The advantageous effect of the present utility model is as follows: Through the coordinated cooperation of the weighing and dosing components, a precisely metered feed of starting material is achieved during the tungsten powder reduction process. The weighing sensors monitor the material weight in real time, and together with the rotatable first and second separating plates, they enable excess material to be separated into the collection box when there is an excess weight, and the material to be precisely fed into the feed tube when the weight matches the target weight. This solves the problem of the inability to precisely control the feed rate of conventional screw conveyors, avoids raw material waste and stoichiometric imbalances in chemical reactions, ensures the stability of the purity and particle size homogeneity of tungsten powder products, and improves production efficiency. Description of the attached drawings
[0013] In order to explain the technical solution of the embodiments of the present utility model more clearly, a brief description of the drawings required to describe the embodiments is given below. Fig. Figure 1 is a perspective view of a rotary kiln for tungsten powder reduction with a metered feeding structure; Fig. Figure 2 is a schematic representation of a surface structure of the feed tube of the rotary kiln for tungsten powder reduction with a metered feed structure; Fig. Figure 3 is a sectional view of a feed tube of the rotary kiln for tungsten powder reduction with a metered feed structure; Fig. Figure 4 is a schematic representation of the structure of a weighing component of the rotary kiln for tungsten powder reduction with a metered feeding structure; Fig. Figure 5 is a sectional view of a weighing housing of the rotary tube furnace for tungsten powder reduction with a metered feeding structure; Fig. Figure 6 is a schematic representation of the rotation of a first separating plate of the rotary tube furnace for tungsten powder reduction with a metered feeding structure.
[0014] Explanation of reference numbers: 1. Support frame; 2. Furnace body; 3. Feed pipe; 4. First screw conveyor; 5. Weighing component; 51. Material distribution pipe; 52. Weighing sensor; 53. Support seat; 54. Fixing seat; 55. Fixing tube; 56. Weighing housing; 6. Metering component; 61. Rotary axis; 62. First divider plate; 63. Second divider plate; 64. Discharge outlet; 65. Material distribution outlet; 66. Drive motor; 67. Rotary plate; 68. Cover; 7. Inclined plate; 8. Collection box; 9. Fixing housing; 10. Feed opening; 11. Guide tube; 12. Second screw conveyor; 13. Storage housing; 14. Bracket. Detailed description
[0015] The technical solutions of the embodiments of this utility model are described clearly and completely below with reference to the accompanying drawings. The described embodiments represent only a portion of the embodiments of this utility model, not all of them. Example 1
[0016] With reference to Fig. 1 and Fig. Section 3 describes the first embodiment of the present utility model, wherein this embodiment provides a rotary kiln for tungsten powder reduction with a metered feeding structure. The rotary kiln for tungsten powder reduction with a metered feeding structure comprises a support frame 1, wherein a kiln body 2 is installed inside the support frame 1, a feeding tube 3 is connected to one side of the kiln body 2, and a first screw conveyor 4 is installed inside the feeding tube 3.A weighing component 5 is arranged on one side of the feed tube 3, the weighing component 5 comprising a material distribution tube 51 connected to one side of the feed tube 3, two weighing sensors 52 installed inside the material distribution tube 51, a support seat 53 installed on the top of one weighing sensor 52 and a fixing seat 54 installed on the top of the other weighing sensor 52, a fixing tube 55 installed on the top of the support seat 53, and a weighing housing 56 installed on one side of the fixing tube 55. A dosing component 6 is further arranged on one side of the weighing housing 56. The metering component 6 comprises a rotary axis 61 movably connected inside the weighing housing 56, a first separating plate 62 and a second separating plate 63 installed on the surface of the rotary axis 61, as well as a discharge opening 64 and a material distribution opening 65 formed on the surface of the weighing housing 56.
[0017] When adding feed material to the interior of the furnace body 2, the operator first fills the storage housing 13 with the feed material, then starts the second screw conveyor 12. The second screw conveyor 12 conveys the feed material in the storage housing 13 and directs it through the guide tube 11 into the feed opening 10. After passing through the feed opening 10, the feed material enters the weighing housing 56. The weight of the feed material exerts pressure on the two weighing sensors 52 via the weighing housing 56, the support seat 53, and the locking seat 54. The two weighing sensors 52 monitor the weight of the added feed material in real time. As soon as the weight reaches the set value, the second screw conveyor 12 is switched off to stop the conveying, and the two weighing sensors 52 perform a reweighing of the feed material in the weighing housing 56.
[0018] When the weight of the input material in the weighing housing 56 exceeds the set value, the drive motor 66 is started. The drive motor 66 drives the rotary axis 61. This drives the first separating plate 62 and the second separating plate 63 so that they rotate counterclockwise, as shown in Fig. Figure 6 illustrates this. During the rotation of the first separating plate 62, the input material is pushed towards the material distribution opening 65. Simultaneously with the rotation of the rotary axis 61, the rotating plate 67 and the cover 68 rotate synchronously. The rotation of the cover 68 lifts the cover of the material distribution opening 65, allowing the excess input material to drain and be directed through the inclined plate 7 into the collection box 8 for collection, thus ensuring precise weighing. When the weight of the input material in the weighing housing 56 reaches the set value, the drive motor 66 is activated to rotate clockwise. The drive motor 66 drives the rotary axis 61, which in turn drives the first separating plate 62 and the second separating plate 63 to rotate clockwise.The second separating plate 63 pushes the feed material into the discharge opening 64 and introduces it into the feed pipe 3 via the material distribution pipe 51. The first screw conveyor 4 is then started, which introduces the feed material into the furnace body 2, thus achieving metered feeding and improving reaction efficiency.
[0019] The furnace body 2 serves to carry out the reduction reaction of the tungsten powder. The feed tube 3 acts as a channel for the material to enter the furnace body 2. The first screw conveyor 4 is located inside the feed tube 3 and is responsible for conveying the weighed material to the furnace body 2. The material distribution tube 51 provides a flow path for the material and forms an independent weighing area. The two weighing sensors 52 located inside the material distribution tube 51 monitor the weight of the weighing housing 56 and the material in real time with high accuracy. The support seat 53 and the fixing seat 54 are each installed on top of the two weighing sensors 52 and serve to support the upper structures and transmit weight signals. The fixing tube 55 is installed on top of the support seat 53 and serves as a rigid component for connection and support.The weighing housing 56 is installed on one side of the fixing tube 55 and is designed to hold the material to be weighed. The dosing component 6, located on one side of the weighing housing 56, controls the sorting and dispensing of the material based on the weighing results. Example 2
[0020] With reference to Fig. 2 to Fig. Section 4 describes the second embodiment of the present utility model, which is based on the previous embodiment.
[0021] In detail, it is as follows: the dosing component 6 further comprises a drive motor 66 installed on the top of the fixing seat 54, a rotary plate 67 installed on the surface of the rotary axis 61, and a cover 68 installed on one side of the rotary plate 67. The output end of the drive motor 66 is fixedly connected to the rotary axis 61, and the fixing tube 55 is movably connected to the inner wall of the cover 68 via a bearing. An inclined plate 7 is arranged on the underside of the material distribution opening 65, a collection box 8 is arranged on the underside of the inclined plate 7, and a fixing housing 9 is arranged on the underside of the collection box 8.
[0022] The rotary axis 61 serves as the core of the rotary drive unit. The first separating plate 62, installed on the rotary axis 61, pushes the material towards the material distribution opening 65 when it is overweight. The second separating plate 63, also installed on the rotary axis 61, pushes the material towards the discharge opening 64 when a certain weight is reached. The discharge opening 64, formed on the surface of the weighing housing 56, serves to discharge the material of the required quality into the feed tube 3, while the material distribution opening 65 is designed to discharge the excess material. The drive motor 66 provides the power for the rotation of the rotary axis 61. The rotary plate 67 rotates together with the rotary axis 61 and drives the cover 68. The cover 68 opens or closes the material distribution opening 65 during rotation and controls the timing of the discharge of the excess material.The output end of the drive motor 66 is directly connected to the rotary axis 61 to ensure precise power transmission. The fixing tube 55 is movably connected to the inner wall of the cover 68 via a bearing, allowing the cover 68 to rotate stably. The inclined plate 7, located below the material distribution opening 65, guides the excess material towards the collection box 8. The collection box 8 serves for the temporary storage of the excess material. The fixing housing 9, located below the collection box 8, provides support for the collection box 8. One side of the fixing housing 9 is attached to the inner wall of the material distribution tube 51, thus creating a stable connection between the structures. Example 3
[0023] With reference to Fig.Section 6 describes the third embodiment of the present utility model, which is based on the two previous embodiments.
[0024] In detail, it is as follows: One side of the fixing housing 9 is fixedly connected to the inner wall of the material distribution pipe 51, and both sides of the inclined plate 7 are each fixedly connected to the inner wall of the material distribution pipe 51. A feed opening 10 is formed on the top of the weighing housing 56, a guide tube 11 is arranged on the top of the feed opening 10, a second screw conveyor 12 is arranged on the top of the guide tube 11, and a storage housing 13 is connected to the top of the second screw conveyor 12. A bracket 14 is fixedly connected to one side of the second screw conveyor 12, and the other side of the bracket 14 is fixedly connected to the material distribution pipe 51.
[0025] Both sides of the inclined plate 7 are also attached to the inner wall of the material distribution pipe 51 to ensure a smooth flow path. The feed opening 10, located at the top of the weighing housing 56, receives the material from above. The guide tube 11, located above the feed opening 10, directs the material from the second screw conveyor 12 into the weighing housing 56. The second screw conveyor 12 conveys the material in the storage housing 13 to the weighing housing 56. The storage housing 13 serves to hold the raw materials to be processed. One side of the second screw conveyor 12 is secured by the bracket 14, and the other side of the bracket 14 is connected to the material distribution pipe 51, thus increasing the stability of the entire feeding structure.
[0026] It should be noted that the above embodiments serve only to illustrate, and not to limit, the technical solution of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, it should be obvious to those skilled in the art that the technical solution of the present utility model can be modified or replaced by equivalent alternatives without departing from the spirit and scope of the technical solution of the present utility model. All such modifications and alternatives shall fall within the scope of protection of the claims of the present utility model.
Claims
[1] A rotary kiln for tungsten powder reduction with a metered charging structure, comprising a support frame (1), wherein a kiln body (2) is installed inside the support frame (1), a charging tube (3) is connected to one side of the kiln body (2), and a first screw conveyor (4) is installed inside the charging tube (3), characterized by, that a weighing component (5) is arranged on one side of the feed tube (3), the weighing component (5) comprising a material distribution tube (51) connected to one side of the feed tube (3), two weighing sensors (52) installed inside the material distribution tube (51), a support seat (53) installed on the top of one weighing sensor (52) and a fixing seat (54) installed on the top of the other weighing sensor (52), a fixing tube (55) installed on the top of the support seat (53) and a weighing housing (56) installed on one side of the fixing tube (55); that furthermore a metering component (6) is arranged on one side of the weighing housing (56);and that the metering component (6) comprises a rotary axis (61) movably connected inside the weighing housing (56), a first separating plate (62) and a second separating plate (63) installed on the surface of the rotary axis (61), as well as a discharge opening (64) and material distribution opening (65) formed on the surface of the weighing housing (56). [2] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 1, characterized by , that the metering component (6) further comprises a drive motor (66) installed on the top of the fixing seat (54), a rotary plate (67) installed on the surface of the rotary axis (61) and a cover (68) installed on one side of the rotary plate (67). [3] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 2, characterized by, that the output end of the drive motor (66) is fixedly connected to the axis of rotation (61) and the fixing tube (55) is movably connected to the inner wall of the cover (68) via a bearing. [4] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 1, characterized by , that a slanted plate (7) is arranged on the underside of the material distribution opening (65), a collection box (8) is arranged on the underside of the slanted plate (7) and a fixing housing (9) is arranged on the underside of the collection box (8). [5] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 4, characterized by , that one side of the fixing housing (9) is firmly connected to the inner wall of the material distribution tube (51) and both sides of the inclined plate (7) are each firmly connected to the inner wall of the material distribution tube (51). [6] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 1, characterized by , that a feed opening (10) is formed on the top of the weighing housing (56), a guide tube (11) is arranged on the top of the feed opening (10), a second screw conveyor (12) is arranged on the top of the guide tube (11), and a storage housing (13) is connected to the top of the second screw conveyor (12). [7] The rotary kiln for tungsten powder reduction with a metered charging structure according to claim 6, characterized by , that a support (14) is firmly attached to one side of the second screw conveyor (12) and the other side of the support (14) is firmly attached to the material distribution pipe (51).