A drying system for preparing a multi-alloy feedstock

Abstract

The application provides a drying system for preparing multi-element alloy raw materials, which comprises a rotating cylinder body arranged obliquely, a feeding device connected to the front end of the rotating cylinder body, and a hot air system connected to the tail end of the rotating cylinder body. The hot air provided by the hot air system is heated inert gas. The inner wall of the rotating cylinder body is uniformly provided with vortex-shaped leaf plates, and a groove is formed between the vortex-shaped leaf plates and the inner wall of the cylinder body for increasing the residence time of the materials and uniformly falling the materials. At least one set of circuitous mixing components is arranged in the middle of the cylinder body for improving the uniformity of the material mixing. The feeding device comprises a vacuum feeder and an air-lock feeder, and realizes intermittent closed feeding. A discharging cover is arranged at the tail end of the cylinder body and is sealingly connected to the cylinder body through a rotary sealing structure. The discharging cover is connected to a discharging port and a discharging pipeline. A pneumatic butterfly valve is installed on the discharging pipeline to realize closed discharging. The application can avoid oxidation of metal powder, improve the uniformity of mixing, and realize high-quality drying of multi-element alloy raw materials.

Description

Technical Field

[0001] This utility model belongs to the field of alloy raw material drying technology, specifically relating to a drying system for preparing multi-element alloy raw materials. Background Technology

[0002] Existing rotary dryers are typically used for drying conventional bulk materials such as ores, sand, gravel, and chemical raw materials. Their basic principle is to continuously tumble and heat the material in the hot airflow through the rotation of the cylinder and the lifting of the internal lifting plates, thereby accelerating the evaporation of moisture. These devices have a relatively simple structure and are suitable for the continuous drying of bulk raw materials, and have been widely used in the field of traditional powder processing.

[0003] However, existing rotary dryers cannot meet the specific requirements of metal powder raw materials for multi-component alloys. For example, metal powders are extremely sensitive to oxygen, and open or semi-closed drying environments easily lead to oxidation. Secondly, traditional lifting plates cause particle grading and stratification during the turning process, disrupting the homogeneity of the multi-component components. In addition, the feeding and discharging links generally lack closed and inert atmosphere protection, making it difficult to achieve material transfer in an oxygen-free environment. Therefore, existing rotary dryers are not suitable for high-quality drying processes of multi-component alloy powder raw materials. Summary of the Invention

[0004] The present invention aims to provide a drying system for preparing multi-component alloy raw materials, thereby solving the technical problem that existing rotary dryers are not suitable for drying multi-component alloy raw materials.

[0005] To address the aforementioned issues, this application provides a drying system for preparing multi-element alloy raw materials, comprising an inclined rotating cylinder, a feeding device connected to the front end of the rotating cylinder, a hot air system connected to the rear end of the rotating cylinder, a plurality of lifting plates evenly distributed on the inner wall of the rotating cylinder, and the hot air provided by the hot air system being an inert gas. The lifting plates on the inner wall of the rotating cylinder are vortex-shaped blades, and grooves for temporarily storing raw materials are formed between the vortex-shaped blades and the inner wall of the rotating cylinder. At least one set of meandering mixing components is fixed inside the rotating cylinder, and the meandering mixing components are arranged along the axis of the rotating cylinder; The feeding device includes a vacuum feeder and an airlock feeder. The outlet of the vacuum feeder is connected to the inlet of the airlock feeder, and the outlet of the airlock feeder is sealed to the head end of the rotating cylinder. Furthermore, the tail end of the rotating cylinder is fitted with a discharge cover, which is sealed to the rotating cylinder through a rotary sealing structure; at least one discharge port is opened on the side wall of the rotating cylinder, which is connected to the inner cavity of the discharge cover, and a discharge pipe is connected to the discharge cover, on which a pneumatic butterfly valve is installed.

[0006] Furthermore, the meandering mixing assembly includes several mixing plates connected side by side, each group of mixing plates consisting of two mutually perpendicular semi-circular folds.

[0007] Furthermore, the semi-circular folding plate is made of stainless steel.

[0008] Furthermore, the rotary sealing structure is a double-end mechanical seal.

[0009] Furthermore, the meandering mixing components are arranged in 2 to 4 groups at equal intervals in the middle of the rotating cylinder.

[0010] Furthermore, the material conveying pipe of the vacuum feeder is fitted with an anti-static protective layer.

[0011] Furthermore, the outer wall of the rotating cylinder is provided with a heat insulation layer.

[0012] Furthermore, the drying system for preparing multi-element alloy raw materials also includes a control system. The rotating cylinder is equipped with a temperature monitoring device and an oxygen content monitoring device. The control system is connected to the temperature monitoring device, the oxygen content monitoring device, and the hot air system.

[0013] Furthermore, the inert gas is nitrogen. The technical advantages of this application are as follows: The drying system for preparing multi-component alloy raw materials provided by this utility model, through the combined design of vortex-shaped lifting plates and meandering mixing components inside the rotating cylinder, allows the material to be gently agitated during the drying process, and subjected to shearing and diffusion during its descent. This effectively reduces powder stratification and particle classification, ensuring the uniformity of mixing of the multi-component components. The hot air system uses heated inert gas as the drying medium, avoiding the risk of oxidation of metal powder under high-temperature conditions and improving the stability of material quality. The feeding end is equipped with a sealed combination of a vacuum feeder and a lock-air feeder to achieve intermittent, oxygen-free feeding; the discharging end uses a rotary sealing structure, a discharge hood, and a pneumatic butterfly valve to achieve fully sealed, inert atmosphere-protected discharging. The outer wall of the rotating cylinder is equipped with a heat insulation layer, and combined with temperature and oxygen content monitoring devices, the temperature and atmosphere can be controlled in real time through the control system, further improving the safety and reliability of the drying process.

[0014] In summary, this invention can effectively solve the problem that existing rotary dryers are not suitable for drying multi-element alloy powder raw materials, and has the advantages of uniform drying, avoiding oxidation, airtight safety and high energy efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a drying system for preparing multi-element alloy raw materials; Figure 2 This is a sectional view of the rotating cylinder; Figure 3 This is a schematic diagram of the installation of vortex-shaped blades inside a rotating cylinder. Figure 4 This is a cross-sectional view of the rotating cylinder; Figure 5 This is a schematic diagram of the structure of the circuitous hybrid component; Explanation of reference numerals in the attached figures: 1. Rotating cylinder; 2. Hot air system; 3. Vortex blades; 4. Vacuum feeder; 5. Airlock feeder; 6. Discharge hood; 7. Double-end mechanical seal; 8. Discharge port; 9. Discharge pipe; 10. Pneumatic butterfly valve; 11. Detour mixing assembly; 12. Semi-circular folding plate; 13. Insulation layer; 14. Temperature sensor; 15. Oxygen content sensor. Detailed Implementation

[0016] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0017] Specific embodiment one of the drying system for preparing multi-element alloy raw materials provided by this utility model: like Figure 1-4 As shown, a drying system for preparing multi-element alloy raw materials includes an inclined rotating cylinder 1. A feeding device is connected to the first end of the rotating cylinder 1, and a hot air system 2 is connected to the last end. This embodiment improves upon an existing rotary dryer. All the above components are part of the rotary dryer, which also includes a drive unit for driving the rotating cylinder to rotate. The specific structure and working principle of the rotary dryer will not be described in detail here. The inner wall of the rotating cylinder 1 is evenly distributed with several vortex-shaped blades 3. Grooves are formed between the vortex-shaped blades 3 and the inner wall of the rotating cylinder 1, which can temporarily store the raw materials during the rotation of the rotating cylinder 1, increasing the residence time of the material within the rotating cylinder 1 and allowing it to gently fall in a "blanket-like" manner, greatly reducing dust and particle grading.

[0018] The existing hot air system 2 can provide hot nitrogen at a constant temperature. The nitrogen is heated to a set temperature before entering the rotating cylinder 1. It flows through the tail end of the rotating cylinder 1 and enters the interior, making full contact with the falling alloy powder to complete the drying. In addition, the heat source nitrogen can prevent it from reacting with the material and ensure the stability of the material properties.

[0019] The feeding device adopts a combination of vacuum feeder 4 and airlock feeder 5. The discharge port of vacuum feeder 4 is connected to the inlet of airlock feeder 5, and the discharge port of airlock feeder 5 is sealed to the head end of rotating cylinder 1 to achieve intermittent, sealed feeding and prevent air from entering rotating cylinder 1.

[0020] The rotating cylinder 1 has a discharge cover 6 at its tail end, which is connected to the tail end of the rotating cylinder 1 via a double-end mechanical seal 7. The rotating cylinder 1 has a discharge port 8 on its side wall, which communicates with the inner cavity of the discharge cover 6. The discharge cover 6 is equipped with a discharge pipe 9, which is equipped with a pneumatic butterfly valve 10, enabling quantitative and sealed discharge. The discharge process is carried out under an inert atmosphere.

[0021] A second specific embodiment of the drying system for preparing multi-element alloy raw materials provided by this utility model: Based on Example 1, such as Figure 2 and Figure 5 As shown, two sets of meandering mixing components 11 are equally spaced in the middle of the rotating cylinder 1. Each meandering mixing component 11 includes several mixing plates connected side by side. Each set of mixing plates consists of two mutually perpendicular semi-circular folding plates 12. The semi-circular folding plates 12 are made of stainless steel, which is corrosion-resistant and high-temperature resistant.

[0022] When the material is picked up and falls by the vortex-shaped blades 3 inside the rotating cylinder 1, it will pass through these semi-circular baffles 12 and be subjected to significant shearing and diffusion effects, thereby breaking up the material stratification caused by differences in particle size and density and improving the mixing uniformity of the multi-element alloy powder components.

[0023] Meanwhile, in the feeding device section, an anti-static protective layer is added to the outer wall of the conveying pipe of the vacuum feeder 4. This effectively eliminates the static electricity accumulation that may be generated by the friction of metal powder during the conveying process, reduces the risk of spark discharge, and improves operational safety. The anti-static protective layer can be a conductive coating, a conductive plastic sheath, or a conductive fiber braided layer, used to dissipate static electricity generated by the friction of powder conveying.

[0024] Specific embodiment three of the drying system for preparing multi-element alloy raw materials provided by this utility model: Based on Embodiments 1 and 2, a temperature monitoring and atmosphere control module is further provided. Specifically, the outer wall of the rotating cylinder 1 is covered with an insulation layer 13 to reduce heat loss, ensure stable internal temperature of the rotating cylinder 1, and improve energy utilization. The insulation layer 13 can be made of thermal insulation materials such as ceramic fiber cotton, aluminum silicate cotton, or high-temperature resistant insulation coating.

[0025] Temperature sensor 14 and oxygen content sensor 15 are installed on the rotating drum 1 to monitor the drying environment inside the rotating drum 1 in real time. The sensor signals are connected to the control system, which can automatically adjust the heating power and nitrogen flow rate of the hot air system 2 according to the detection results, thereby achieving stable temperature control and ensuring that the oxygen concentration is below the preset threshold, so as to ensure that the material is dried safely and stably in a low-oxygen environment.

[0026] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A drying system for preparing multi-element alloy raw materials, comprising an inclined rotating cylinder (1), a feeding device connected to the front end of the rotating cylinder (1), and a hot air system (2) connected to the rear end of the rotating cylinder (1), wherein a plurality of lifting plates are evenly distributed on the inner wall of the rotating cylinder (1), characterized in that: The inner wall of the rotating cylinder (1) has a vortex-shaped blade (3), and a groove for temporarily storing raw materials is formed between the vortex-shaped blade (3) and the inner wall of the rotating cylinder (1); at least one set of meandering mixing components (11) is fixed inside the rotating cylinder (1), and the meandering mixing components (11) are arranged along the axis of the rotating cylinder (1). The feeding device includes a vacuum feeder (4) and a lock air feeder (5). The outlet of the vacuum feeder (4) is connected to the inlet of the lock air feeder (5), and the outlet of the lock air feeder (5) is sealed to the head end of the rotating cylinder (1). The tail of the rotating cylinder (1) is fitted with a discharge cover (6), which is sealed to the rotating cylinder (1) through a rotating sealing structure (7).

2. The drying system for preparing multi-element alloy raw materials according to claim 1, characterized in that: The rotating cylinder (1) has at least one discharge port (8) on its side wall. The discharge port (8) is connected to the inner cavity of the discharge cover (6). The discharge cover (6) is connected to a discharge pipe (9), and a pneumatic butterfly valve (10) is installed on the discharge pipe (9).

3. The drying system for preparing multi-element alloy raw materials according to claim 1, characterized in that: The meandering hybrid assembly (11) includes several hybrid plates connected side by side, each set of hybrid plates consisting of two mutually perpendicular semi-circular folding plates (12).

4. The drying system for preparing multi-element alloy raw materials according to claim 3, characterized in that: The semi-circular folding plate (12) is made of stainless steel.

5. The drying system for preparing multi-element alloy raw materials according to claim 4, characterized in that: The rotary sealing structure (7) is a double-end mechanical seal.

6. A drying system for preparing multi-element alloy raw materials according to any one of claims 1-5, characterized in that: The meandering mixing components (11) are arranged in 2 to 4 groups at equal intervals in the rotating cylinder (1).

7. The drying system for preparing multi-element alloy raw materials according to claim 6, characterized in that: The material conveying pipe of the vacuum feeder (4) is covered with an anti-static protective layer.

8. The drying system for preparing multi-element alloy raw materials according to claim 1, characterized in that: The outer wall of the rotating cylinder (1) is provided with a heat insulation layer (13).

9. The drying system for preparing multi-element alloy raw materials according to claim 1, characterized in that: It also includes a control system, on which a temperature monitoring device (14) and an oxygen content monitoring device (15) are provided, and the control system is connected to the temperature monitoring device (14), the oxygen content monitoring device (15) and the hot air system (2).

10. A drying system for preparing multi-element alloy raw materials according to claim 1, characterized in that: The hot air provided by the hot air system (2) is an inert gas.

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