Drying device for ammonia-free tungsten smelting

Abstract

The utility model relates to the technical field of tungsten smelting equipment, and provides an ammonia-free tungsten smelting drying device which comprises a first support, a drying cylinder is fixedly connected to the first support, an air inlet, a feeding port, a vacuumizing port and an air outlet are formed in the upper end of the drying cylinder, a discharging port is formed in the lower end of the drying cylinder, and a stirring shaft is arranged in the drying cylinder. The stirring shaft is used for stirring materials in the drying cylinder, and a driving mechanism is arranged on the left side of the drying cylinder and used for driving the stirring shaft to rotate. The middle parts of the connecting rods are fixedly connected with the stirring shaft, and the two ends of the connecting rods are fixedly connected with buckets. When the device is used for drying the tungstic acid, the tungstic acid can be greatly stirred, the heating is more uniform, the water vapor emission is more sufficient, and the drying quality and efficiency are improved; the hot air making contact with tungstic acid is conveyed to the dehumidifier, water vapor in the hot air is removed, then the dried hot air is conveyed into the drying cylinder again through the circulating fan, and energy waste is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of tungsten smelting equipment, specifically to a drying device for ammonia-free tungsten smelting. Background Technology

[0002] Tungsten plays a vital role in modern industrial applications due to its unique physical and chemical properties. Its applications are wide-ranging, including aerospace, nuclear energy, shipbuilding, automotive, electrical, electronics, and chemical industries. Particularly in high-temperature alloys, cemented carbides, electronic devices, and lighting equipment, tungsten is an indispensable material due to its high melting point, high density, high hardness, and excellent corrosion resistance.

[0003] With the deepening of the concept of green production, tungsten smelting processes are constantly being innovated. Among them, ammonia-free smelting technology, through innovative processes, fundamentally eliminates the generation of ammonia nitrogen pollutants, effectively avoids the diffusion of ammonia nitrogen during the smelting process, and significantly reduces the difficulty and cost of ammonia nitrogen pollutant treatment, providing strong support for the green transformation of the tungsten smelting industry.

[0004] In the ammonia-free tungsten smelting process developed by our company, scheelite undergoes acid washing, acidolysis, coordination leaching, and pressure filtration to obtain a crude tungstic acid solution. This crude tungstic acid solution is then extracted to remove molybdenum, yielding a pure tungstic acid solution. This pure solution is then subjected to precipitation filtration, centrifugation, and drying to obtain powdered tungstic acid, which is subsequently dried and calcined to obtain tungsten trioxide. The drying of tungstic acid is a crucial step; however, the existing drum dryers used in the tungstic acid drying process have several drawbacks. For example, the rotation of the drying drum cannot significantly agitate the tungstic acid, limiting drying efficiency and quality. Furthermore, the hot air containing the dried moisture after contact with the tungstic acid contains a large amount of unused heat; directly discharging this hot air results in energy waste. These problems indicate that existing drying technologies need further improvement to enhance energy efficiency and product quality while reducing environmental impact. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a drying device for ammonia-free tungsten smelting, comprising:

[0006] Support 1, on which a drying cylinder is fixedly connected. The upper end of the drying cylinder is provided with an air inlet, a material inlet, a vacuum port, and an air outlet. The lower end of the drying cylinder is provided with a material outlet. Inside the drying cylinder is a stirring shaft, which is used to stir the material inside the drying cylinder. The left side of the drying cylinder is provided with a drive mechanism, which is used to drive the stirring shaft to rotate.

[0007] Furthermore, the stirring shaft is fixedly connected to several connecting rods, with the middle of the connecting rods fixedly connected to the stirring shaft and buckets fixedly connected to both ends of the connecting rods.

[0008] Furthermore, adjacent connecting rods are arranged in a perpendicular manner.

[0009] Furthermore, the bucket is spoon-shaped.

[0010] Furthermore, the drive mechanism includes a second bracket and a motor. The second bracket is located on the left side of the first bracket, and the motor is fixedly connected to the second bracket. The output shaft of the motor is fixedly connected to the left end of the stirring shaft.

[0011] Furthermore, a third bracket is provided on the rear side of the first bracket, on which a dehumidifier is fixedly connected. A circulating fan is fixedly connected on the third bracket behind the dehumidifier. An air outlet pipe is fixedly connected to the upper end of the air outlet, and an air inlet pipe is fixedly connected to the upper end of the air inlet. One end of the first circulating pipe is connected to the inlet of the dehumidifier, and the other end is connected to the rear of the air outlet pipe. One end of the second circulating pipe is connected to the outlet of the dehumidifier, and the other end is connected to the inlet of the circulating fan. One end of the third circulating pipe is connected to the outlet of the circulating fan, and the other end is connected to the rear of the air inlet pipe.

[0012] Furthermore, an end cap is fixedly connected to the upper end of the air outlet duct, and a filter element is fixedly connected to the bottom of the end cap. The filter element is embedded inside the air outlet and the air outlet duct.

[0013] Furthermore, the air inlet, feed inlet, vacuum outlet, and air outlet are arranged in order from left to right.

[0014] Furthermore, the air inlet is tilted towards the left end of the drying cylinder.

[0015] Furthermore, a pneumatic feeder is connected to the discharge port.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. Improved Quality and Efficiency. By installing a stirring shaft inside the drying drum and mounting multiple sets of connecting rods with buckets at both ends, a dynamic stirring effect is achieved, lifting tungstic acid from the bottom of the drying drum to the upper part and then allowing it to fall during the drying process. This design ensures deep stirring of the tungstic acid during drying, guaranteeing uniform heating, promoting full dissipation of moisture, and significantly improving drying quality and efficiency. Compared to traditional drum-rotating stirring methods, this stirring method, driven by a stirring shaft and connecting rods and buckets, greatly reduces the load, demonstrating higher economy and energy efficiency. By tilting the air inlet towards the left end of the drying drum, hot air first gathers at the left end and then slowly diffuses throughout the entire drum, filling the entire interior with hot air and further improving drying efficiency.

[0018] 2. Energy-saving and environmentally friendly. By introducing hot air containing moisture that has come into contact with tungstic acid into a dehumidifier, the moisture is effectively removed. A circulating fan then returns this dried hot air, now free of moisture, to the drying drum, forming a highly efficient closed-loop hot air circulation system. This circulation not only ensures that the tungstic acid inside the drying drum is effectively dried in a continuous stream of hot air, but also maintains the continuous dryness of the hot air during the drying process, further improving drying efficiency and quality. Simultaneously, this method avoids the energy waste caused by the direct emission of hot air in traditional drying processes, achieving efficient energy utilization and environmental sustainability. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a drying device for ammonia-free tungsten smelting. Figure 1 .

[0021] Figure 2 A schematic diagram of a drying device for ammonia-free tungsten smelting. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the internal structure of the drying cylinder.

[0023] Figure 4 This is a schematic diagram of the structure of the stirring shaft, connecting rod, and bucket.

[0024] Figure 5 yes Figure 3 Enlarged view of a portion of point A in the middle.

[0025] The labels in the attached diagram are as follows: 10, Support 1; 20, Drying cylinder; 201, Air inlet; 202, Feed inlet; 203, Vacuum outlet; 204, Air outlet; 205, Discharge outlet; 206, Air inlet pipe; 207, Air outlet pipe; 208, Filter element; 30, Stirring shaft; 301, Connecting rod; 302, Bucket; 40, Support 2; 50, Motor; 60, Support 3; 70, Dehumidifier; 701, Circulation pipe 1; 702, Circulation pipe 2; 80, Circulation fan; 801, Circulation pipe 3. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the technical solutions in the specific embodiments of this utility model are clearly and completely described below to further illustrate this utility model. Obviously, the specific embodiments described are only a part of the embodiments of this utility model, and not all of them.

[0027] The structure of the drying device for ammonia-free tungsten smelting of this utility model is as follows: Figures 1-5 As shown, the device includes a support frame 10, on which a drying cylinder 20 is fixedly connected. From left to right, the upper end of the drying cylinder 20 has an air inlet 201, a feed inlet 202, a vacuum port 203, and an air outlet 204. The lower end of the drying cylinder 20 has a discharge port 205. To facilitate material feeding, a pneumatic feeder is connected to the discharge port 205 in this embodiment. A stirring shaft 30 is installed inside the drying cylinder 20 to stir the tungstic acid inside. A drive mechanism is located on the left side of the drying cylinder 20 to drive the stirring shaft 30 to rotate.

[0028] The tungstic acid to be dried enters the drying cylinder 20 through the feed inlet 202. Hot air enters through the air inlet 201 to dry the tungstic acid. The vacuum port 203 is connected to a vacuum pump to evacuate the inside of the drying cylinder 20 before the drying operation. The hot air containing moisture is discharged through the air outlet 204. To ensure that the hot air fills the entire interior of the drying cylinder 20, the air inlet 201 is tilted towards the left end of the interior of the drying cylinder 20. In this way, the hot air first gathers at the left end of the interior of the drying cylinder 20 and then slowly diffuses to the entire interior of the drying cylinder 20, which can improve the drying efficiency.

[0029] The drive mechanism includes a second bracket 40 and a motor 50. The second bracket 40 is located on the left side of the first bracket 10, and the motor 50 is fixedly connected to the second bracket 40. The output shaft of the motor 50 is fixedly connected to the left end of the stirring shaft 30. Several connecting rods 301 are fixedly connected to the stirring shaft 30. The middle part of the connecting rods 301 is fixedly connected to the stirring shaft 30, and two adjacent connecting rods 301 are arranged in a vertical state. A scoop 302 is fixedly connected to both ends of the connecting rods 301. The scoop 302 is spoon-shaped, which provides better stirring effect.

[0030] During the drying process, the bucket 302 carries the tungstic acid from the bottom of the drying drum 20 to the upper part of the drum 20 before it falls back down, resulting in significant agitation of the tungstic acid during drying, more even heating, and more complete moisture dissipation. The agitation of the tungstic acid is achieved by rotating the connecting rod 301 and the bucket 302 via the agitation shaft 30, replacing the traditional method of rotating the drum to agitate the material. This method results in a lower load and is more economical.

[0031] A bracket 3 60 is located on the rear side of bracket 1 10. A dehumidifier 70 is fixedly connected to bracket 3 60. A circulating fan 80 is fixedly connected to bracket 3 60 on the rear side of dehumidifier 70. An air outlet duct 207 is fixedly connected to the upper end of air outlet 204. An air inlet duct 206 is fixedly connected to the upper end of air inlet 201. One end of circulating duct 1 701 is connected to the inlet of dehumidifier 70, and the other end is connected to the rear of air outlet duct 207. One end of circulating duct 2 702 is connected to the outlet of dehumidifier 70, and the other end is connected to the inlet of circulating fan 80. One end of circulating duct 3 801 is connected to the outlet of circulating fan 80, and the other end is connected to the rear of air inlet duct 206. An end cap is fixedly connected to the upper end of air outlet duct 207. A filter element 208 is fixedly connected to the bottom of the end cap. The filter element 208 is embedded inside air outlet 204 and air outlet duct 207.

[0032] When hot air comes into contact with tungstic acid, it carries moisture. The dehumidifier 70 dehumidifies the hot air discharged from the drying drum 20, filtering out the moisture. The dried hot air is then returned to the drying drum 20 by the circulating fan 80, thus saving energy. When the hot air is discharged from the air outlet 204, the filter element 208 prevents the tungstic acid from being discharged along with it. When it is necessary to clean or replace the filter element 208, the end cap at the top of the air outlet 207 can be opened.

[0033] When using this device, the inside of the drying cylinder 20 is first evacuated through the vacuum equipment connected to the vacuum port 203 to ensure the dryness and efficiency of the drying environment. Then, the tungstic acid to be dried is transported into the drying cylinder 20 through the feed port 202. The motor 50 is turned on, and the motor 50 drives the stirring shaft 30 to rotate. The stirring shaft 30 drives the connecting rod 301 and the bucket 302 to rotate, stirring the tungstic acid. Hot air enters the drying cylinder 20 through the air inlet 201 from the air inlet pipe 206 to dry the tungstic acid. The hot air in contact with the tungstic acid is discharged to the dehumidifier 70 through the air outlet 204, the air outlet pipe 207, and the first circulation pipe 701. The dehumidifier 70 dries the hot air containing moisture. The dried hot air continues to be transported to the circulating fan 80 through the second circulation pipe 702. The circulating fan 80 pumps the hot air back to the air inlet pipe 206 through the third circulation pipe 801 and re-enters the drying cylinder 20, forming a closed loop to continuously provide dry hot air for drying. In this way, the tungstic acid inside the drying cylinder 20 can be effectively dried under continuous hot air circulation, while ensuring that the hot air remains dry throughout the drying process, thus improving drying efficiency and quality. Finally, the dried tungstic acid will be discharged from the discharge port 205 at the bottom of the drying cylinder 20.

[0034] The main technical features, basic principles, and related advantages of this utility model have been described above. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the concept or basic characteristics of this utility model. Therefore, the above-described embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0035] Furthermore, it should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drying apparatus for ammonia-free tungsten smelting, characterized in that, Includes a support frame (10), on which a drying cylinder (20) is fixedly connected. The upper end of the drying cylinder (20) is provided with an air inlet (201), a feed inlet (202), a vacuum port (203), and an air outlet (204). The lower end of the drying cylinder (20) is provided with a discharge port (205). Inside the drying cylinder (20) is a stirring shaft (30), which is used to stir the material inside the drying cylinder (20). On the left side of the drying cylinder (20) is a driving mechanism, which is used to drive the stirring shaft (30) to rotate.

2. The drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, The stirring shaft (30) is fixedly connected to several connecting rods (301). The middle part of the connecting rod (301) is fixedly connected to the stirring shaft (30), and the two ends of the connecting rod (301) are fixedly connected to the bucket (302).

3. The drying apparatus for ammonia-free tungsten smelting according to claim 2, characterized in that, The two adjacent connecting rods (301) are arranged in a vertical position.

4. The drying apparatus for ammonia-free tungsten smelting according to claim 2, characterized in that, The bucket (302) is spoon-shaped.

5. The drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, The drive mechanism includes a second bracket (40) and a motor (50). The second bracket (40) is located on the left side of the first bracket (10). The motor (50) is fixedly connected to the second bracket (40). The output shaft of the motor (50) is fixedly connected to the left end of the stirring shaft (30).

6. The drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, A bracket three (60) is provided on the rear side of bracket one (10). A dehumidifier (70) is fixedly connected to bracket three (60). A circulating fan (80) is fixedly connected to bracket three (60) on the rear side of dehumidifier (70). An air outlet (204) is fixedly connected to the upper end of an air outlet (207). An air inlet (201) is fixedly connected to the upper end of an air inlet (206). One end of circulating pipe one (701) is connected to the inlet of dehumidifier (70), and the other end is connected to the rear of air outlet (207). One end of circulating pipe two (702) is connected to the outlet of dehumidifier (70), and the other end is connected to the inlet of circulating fan (80). One end of circulating pipe three (801) is connected to the outlet of circulating fan (80), and the other end is connected to the rear of air inlet (206).

7. A drying apparatus for ammonia-free tungsten smelting according to claim 6, characterized in that, An end cap is fixedly connected to the upper end of the air outlet pipe (207), and a filter element (208) is fixedly connected to the bottom of the end cap. The filter element (208) is embedded inside the air outlet (204) and the air outlet pipe (207).

8. The drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, The air inlet (201), feed inlet (202), vacuum port (203) and air outlet (204) are arranged from left to right.

9. A drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, The air inlet (201) is inclined to the left end of the inside of the drying cylinder (20).

10. A drying apparatus for ammonia-free tungsten smelting according to claim 1, characterized in that, The discharge port (205) is connected to a pneumatic feeder.

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