A molybdenum concentrate purification treatment device and method

Abstract

The present application relates to molybdenum ore screening purification technical field, specifically is a kind of molybdenum concentrate purification treatment device and method, including vibrating screen, vibrating screen upper side vertical sliding is provided with lifting plate, lifting plate lower side is fixedly installed with cover plate, cover plate axis position is rotatably provided with rotary cylinder, rotary cylinder lower side is along its circumferential direction equidistantly provided with vortex scraper connected with its rotation, vortex scraper is along its length direction equidistantly set with several rubbing and twisting cylinders, the molybdenum powder is scraped by the vortex scraper driven by the rotary cylinder in the present application, simultaneously, the vortex scraper and rubbing and twisting cylinder cooperate to actively disperse the agglomerate on the vibrating screen, in addition, the rotary cylinder is driven by the synchronous motor to alternately rotate, the molybdenum powder can be quickly laid and moved back and forth on the screen by the vortex scraper, so that the fine material with qualified particle size after dispersion can pass through the screen in time and directly.

Description

Technical Field

[0001] This invention relates to the field of molybdenum ore screening and purification technology, specifically to a molybdenum concentrate purification and treatment device and method. Background Technology

[0002] As an important industrial raw material, the purity of molybdenum concentrate directly affects subsequent processing technology and the performance of the final product. In the processing of molybdenum concentrate, it is often necessary to screen and purify molybdenum powder. This process is crucial to ensuring the quality and performance of the final molybdenum products. Currently, in industrial production, the swing vibrating screen is one of the commonly used equipment for screening and purifying such powders.

[0003] The movement of a vibrating screen simulates the swaying motion and up-and-down vibration of manual sieving. Its main separation force comes from the frictional force generated by the relative motion between the material and the screen. However, for fine powders such as molybdenum powder, due to their small particle size and large specific surface area, they are prone to forming solid agglomerates during production and storage due to van der Waals forces, electrostatic forces, etc. The relatively gentle sieving force provided by the vibrating screen is often insufficient to effectively break up these solid agglomerates. As a result, a large amount of fine powder that has already met the qualified standards is encapsulated or adhered inside the agglomerates and is sent to the discharge end along with the coarse material, resulting in the loss of fine powder and a reduction in recovery rate.

[0004] Furthermore, the material in a gyratory screen typically moves from the center to the periphery along an approximately spiral trajectory under the combined action of vibration and gravity. This trajectory is relatively fixed and singular. In the later stages of the screening process, some fine materials that have already dispersed or whose particle size is within acceptable limits may be trapped in the coarse material layer or restricted by the movement path, making it difficult for them to pass through the screen in a timely and direct manner. This results in decreased screening efficiency, prolonged screening time, and often unsatisfactory final screening effect, affecting the overall purification efficiency and product quality. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a molybdenum concentrate purification and processing device and method, including a vibrating screen, a lifting plate vertically slidingly arranged on the upper side of the vibrating screen, a cover plate fixedly installed on the lower side of the lifting plate, a rotating cylinder rotatably arranged at the axis position of the cover plate, a vortex scraper rotatably connected to the rotating cylinder at equal intervals along its circumference at the lower side of the rotating cylinder, and a plurality of kneading cylinders slidably connected to the vortex scraper at equal intervals along its length direction.

[0006] The purification and processing device also includes an air-inflating mechanism. The air-inflating mechanism introduces air into the kneading drum, causing the kneading drum to press down on the screen of the vibrating screen under the action of air pressure, thereby kneading and breaking up the agglomerates. A synchronous motor is fixedly installed on the upper side of the lifting plate, and the output shaft of the synchronous motor is connected to the rotating drum through a belt mechanism.

[0007] The synchronous motor drives the rotating drum to rotate alternately in the forward and reverse directions, causing the vortex scraper to scrape the molybdenum powder on the vibrating screen alternately in and out.

[0008] Preferably, the inflation mechanism includes an air inlet cover rotatably mounted on the upper side of the rotating drum, and an air guide pipe fixedly mounted on the outer side of the rotating drum, corresponding one-to-one with the vortex scraper. The air guide pipe is connected to the vortex scraper through a flexible hose for blowing air into the inside of the kneading drum.

[0009] Preferably, a hydraulic cylinder is provided between the vibrating screen and the lifting plate, and the air inlet cover pipe is connected to an external air pump.

[0010] Preferably, the kneading cylinder has a stepped structure with a larger diameter at the top and a smaller diameter at the bottom, and the lower part of the kneading cylinder with a smaller diameter is slidably connected to and sealed with the vortex scraper.

[0011] Preferably, the lower side of the kneading cylinder is provided with air blowing holes at equal intervals along its circumference. When the high-pressure gas inside the kneading cylinder pushes the kneading cylinder downward to extend to the lower side of the vortex scraper, the airflow inside the kneading cylinder blows the molybdenum powder through the air blowing holes.

[0012] Preferably, the lower end of the kneading cylinder is provided with several spiral grooves at equal intervals along its circumference. When the kneading cylinder rotates, the molybdenum powder is gradually pushed to its lower end for kneading through the inclined surfaces of the spiral grooves.

[0013] Preferably, a plurality of cutting plates with blades at their lower ends are fixedly installed on the spiral groove inclined surface of the kneading drum. The cutting plates are used to cut the molybdenum powder while the kneading drum is kneading it.

[0014] Preferably, the lower side of the vortex scraper has a stepped structure that is low in the middle and high on both sides. When kneading molybdenum powder, the vortex scraper swings back and forth, so that the edges of the stepped structure on the lower side of the vortex scraper break up the agglomerated molybdenum powder.

[0015] Preferably, a swing plate is fixedly installed on the rotating shaft of the vortex scraper, and a connecting rod is rotatably connected to the upper end of the swing plate. A linkage block that is rotatably connected to all the connecting rods is slidably arranged on the inner side of the rotating cylinder. A hydraulic cylinder with a telescopic section that is rotatably connected to the linkage block is fixedly installed on the cover plate.

[0016] Preferably, the present invention also provides a method for purifying molybdenum concentrate, the specific steps of which are as follows: S1, pour the molybdenum powder to be screened and purified into the upper layer of the vibrating screen, lower the cover plate to cover the vibrating screen, start the vibrating screen to screen the molybdenum powder, and at the same time, alternately rotate the rotating cylinder in both directions to scrape the molybdenum powder inside and out through the vortex scraper, so as to make full use of the screen area of ​​the vibrating screen.

[0017] S2. After the vortex scraper pushes the molybdenum powder inside and outside for a period of time, the rotating cylinder moves upward, causing the kneading cylinder to extend the vortex scraper downward. The vortex scraper is kept rotating in both directions, so that the kneading cylinder kneads and disperses the molybdenum powder.

[0018] S3. When kneading molybdenum powder with a kneading drum, the alternating forward and reverse micro-oscillating vortex scraper presses and divides the agglomerates from below, further breaking them up.

[0019] S4. The broken agglomerated molybdenum powder is continuously pushed by the alternating inward and outward movement of the vortex scraper, and then passes through the screen holes of the vibrating screen for downward sieving, thereby completing the purification.

[0020] The beneficial effects of this invention are as follows: First, this invention uses a rotating cylinder to drive a vortex scraper to scrape molybdenum powder. At the same time, the vortex scraper and the kneading cylinder work together to actively break up the agglomerates on the vibrating screen. In addition, the rotating cylinder, which rotates alternately in the forward and reverse directions by a synchronous motor, can push the molybdenum powder to spread quickly and move back and forth on the screen through the vortex scraper, so that the fine material with qualified particle size after being broken up can pass through the screen in a timely and direct manner.

[0021] Second, this invention employs an air-inflating mechanism to introduce air into the kneading cylinder when the vortex scraper is moved to a position where it is no longer in contact with the vibrating screen. This causes the cylinder to extend automatically under air pressure. The vortex scraper then drives the kneading cylinder through the spiral groove inclined surface on its lower side, gradually pushing the molybdenum powder to its lower end for kneading. Simultaneously, a cutting plate performs real-time cutting of the molybdenum powder during the kneading process, preventing the molybdenum powder from forming cakes and improving the dispersing effect and sieving uniformity.

[0022] Third, this invention employs a method where, while kneading molybdenum powder in a kneading drum, the reciprocating motion of a telescopic section of a hydraulic cylinder drives a vortex scraper to oscillate alternately in both directions with slight amplitude. The stepped structure and sharp edges on the lower side of the vortex scraper press and break up the agglomerated molybdenum powder, further enhancing the decomposition and dispersal of the agglomerates.

[0023] Fourth, the present invention employs an airflow that blows onto the molybdenum powder through the air blowing hole when the kneading drum extends to the underside of the vortex scraper. This kneads the molybdenum powder while simultaneously turning it over, which on the one hand promotes the dispersal of agglomerates, and on the other hand increases the contact opportunity between the molybdenum powder and the vibrating screen mesh, thereby enabling qualified fine materials to pass through the screen mesh in a timely manner, improving screening efficiency and finished product recovery rate. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a partial cross-sectional view of the lifting plate, inflation mechanism, synchronous motor and rotating cylinder in this invention.

[0027] Figure 3 This is a partial cross-sectional view of the cover plate, air inlet cover, hydraulic cylinder 1, and air guide pipe in this invention.

[0028] Figure 4 This is a partial cross-sectional view of the rotating cylinder, linkage block, swing plate, and connecting rod in this invention.

[0029] Figure 5 This is a partial cross-sectional view of the vortex scraper, kneading cylinder, air guide tube, and air blowing hole in this invention.

[0030] Figure 6 This is a schematic diagram of the structure of the kneading cylinder, air blowing hole and cutting plate in this invention.

[0031] In the diagram: 1. Vibrating screen; 2. Lifting plate; 3. Cover plate; 4. Rotating drum; 5. Vortex scraper; 6. Kneading drum; 7. Air filling mechanism; 8. Synchronous motor; 21. Hydraulic cylinder two; 51. Swing plate; 52. Connecting rod; 53. Linkage block; 54. Hydraulic cylinder one; 61. Air blowing hole; 62. Cutting plate; 71. Air inlet cover; 72. Air guide pipe. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] See Figure 1 , Figure 2 , Figure 4 and Figure 5 A molybdenum concentrate purification and processing device includes a vibrating screen 1, a lifting plate 2 vertically slidingly disposed on the upper side of the vibrating screen 1, a cover plate 3 fixedly installed on the lower side of the lifting plate 2, a rotating cylinder 4 rotatably disposed on the axis of the cover plate 3, a vortex scraper 5 rotatably connected to the rotating cylinder 4 rotatably disposed at equal intervals along its circumference on the lower side of the rotating cylinder 4, and a plurality of kneading cylinders 6 slidably connected to the vortex scraper 5 rotatably disposed at equal intervals along its length direction.

[0034] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The purification and processing device also includes an air-pressing mechanism 7. The air-pressing mechanism 7 presses the kneading drum 6 downwards onto the vibrating screen 1 under the action of air pressure, thereby kneading and breaking up the agglomerates. A synchronous motor 8 is fixedly installed on the upper side of the lifting plate 2. The output shaft of the synchronous motor 8 is connected to the rotating drum 4 through a belt mechanism.

[0035] It should be noted that the vibrating screen 1 in this invention adopts the multi-stage vibrating screen machine in the prior art. The vibrating screen 1 has multiple screen plates distributed vertically. The diameter of the screen holes of the screen plates gradually decreases from top to bottom. Therefore, the vibrating screen 1 can screen molybdenum powder step by step.

[0036] See Figure 1 and Figure 2 The synchronous motor 8 drives the rotating cylinder 4 to rotate alternately in the forward and reverse directions, so that the vortex scraper 5 alternately scrapes the molybdenum powder on the vibrating screen 1 inside and out. The vibrating screen 1 and the lifting plate 2 are both equipped with a hydraulic cylinder 21.

[0037] When molybdenum powder needs to be screened and purified, the operator first pours the molybdenum powder into the vibrating screen 1, so that the molybdenum powder is located at the top of the screen of the vibrating screen 1. Then, the telescopic section of the hydraulic cylinder 21 is retracted, which drives the cover plate 3 to move downward, so that the cover plate 3 drives the lower side of the vortex scraper 5 to abut against the top of the screen of the vibrating screen 1 through the rotating cylinder 4. Then, the synchronous motor 8 and the vibrating screen 1 are started, so that the vibrating screen 1 vibrates and screens the molybdenum powder, while the synchronous motor 8 drives the vortex scraper 5 to rotate intermittently in both directions through the rotating cylinder 4.

[0038] It should be noted that, as Figure 1 and Figure 2 As shown, a hopper for feeding is provided on the upper side of the cover plate 3. The molybdenum powder to be screened can be added to the vibrating screen 1 in real time through the hopper, so that the screening operation can be carried out continuously without frequently moving the cover plate 3 upwards.

[0039] When the vortex scraper 5 rotates in the forward direction, it pushes the molybdenum powder outward through its convex side. When the vortex scraper 5 rotates in the reverse direction, it pushes the molybdenum powder inward through its concave side. This causes the molybdenum powder to move back and forth on the uppermost screen of the vibrating screen 1. By actively moving the molybdenum powder, the screen area is fully utilized, increasing the probability that fine material can directly pass through the uppermost screen, thereby improving the purification rate and screening efficiency.

[0040] See Figure 2 , Figure 3 , Figure 5 and Figure 6 The inflation mechanism 7 includes an air inlet cover 71 rotatably mounted on the upper side of the rotating cylinder 4, and an air guide pipe 72 fixedly mounted on the outer side of the rotating cylinder 4 corresponding to the vortex scraper 5. The air guide pipe 72 is connected to the vortex scraper 5 through a hose for blowing air into the inside of the kneading cylinder 6. The air inlet cover 71 is connected to an external air pump.

[0041] It should be noted that a rubber sealing ring is provided between the air inlet cover 71 and the rotating cylinder 4 to ensure airtightness.

[0042] See Figure 5 and Figure 6 The kneading cylinder 6 has a stepped structure with a larger diameter at the top and a smaller diameter at the bottom. The lower part of the kneading cylinder 6 with a smaller diameter is slidably connected to and sealed with the vortex scraper 5.

[0043] Continue reading Figure 5 and Figure 6The lower end of the kneading cylinder 6 is provided with several spiral grooves at equal intervals along its circumference. When the vortex scraper 5 rotates, the kneading cylinder 6 gradually pushes the molybdenum powder to its lower end for kneading through the inclined surface of the spiral grooves.

[0044] See Figure 6 Several cutting plates 62 with blades at their lower ends are fixedly installed on the spiral groove inclined surface of the kneading cylinder 6. The cutting plates 62 are used to cut the molybdenum powder while the kneading cylinder 6 is kneading it.

[0045] After the vortex scraper 5 rotates against the uppermost screen for a period of time, the telescopic section of the hydraulic cylinder 21 extends, causing the vortex scraper 5 to move upward. At the same time, air is blown into the air inlet cover 71 by an external air pump, so that the airflow flows into the air guide pipe 72 along the rotating cylinder 4, and then flows into each kneading cylinder 6 through the air guide pipe 72. This prevents the kneading cylinder 6 from moving upward with the vortex scraper 5 under the push of the airflow, so that the lower end face of the kneading cylinder 6 abuts against the uppermost screen.

[0046] It should be noted that a cavity is provided inside the vortex scraper 5 corresponding to the position of the kneading cylinder 6, and the cavity is connected to the external space on the upper side of the vortex scraper 5. In the initial state, the kneading cylinder 6 extends downward from the vortex scraper 5 by its own gravity, and is stuck inside the vortex scraper 5 by the large diameter part of the upper part of the kneading cylinder 6, preventing the kneading cylinder 6 from falling down out of the vortex scraper 5. Since the cavity is connected to the outside, the large diameter part of the kneading cylinder 6 does not compress air when it moves inside the vortex scraper 5, thus ensuring the smooth movement of the kneading cylinder 6.

[0047] When the vortex scraper 5 rotates, the molybdenum powder is gradually pushed to its lower end for kneading through the spiral groove inclined surface of the kneading cylinder 6. At the same time, the cutting plate 62 cuts the molybdenum powder in real time during the kneading process to prevent the molybdenum powder from forming cakes and to improve the dispersing effect and sieving uniformity.

[0048] It should be emphasized that the air pressure supplied by the external air pump into the kneading drum 6 is obtained through repeated experiments by those skilled in the art, and is able to push the kneading drum 6 against the uppermost screen of the vibrating screen 1 with appropriate force, so as to prevent the kneading drum 6 from pulverizing the molybdenum powder in the sieving process.

[0049] To improve the dispersing effect on agglomerated molybdenum powder, the present invention designs the following structure: (See reference) Figure 5 The lower side of the vortex scraper 5 has a stepped structure that is low in the middle and high on both sides. When kneading molybdenum powder, the vortex scraper 5 swings back and forth, so that the edges of the stepped structure on the lower side of the vortex scraper 5 break up the agglomerated molybdenum powder.

[0050] See Figure 3 and Figure 4A swing plate 51 is fixedly installed on the rotating shaft of the vortex scraper 5. A connecting rod 52 is rotatably connected to the upper end of the swing plate 51. A linkage block 53, which is rotatably connected to all the connecting rods 52, is slidably installed on the inner side of the rotating cylinder 4. A hydraulic cylinder 54, which is rotatably connected to the linkage block 53, is fixedly installed on the cover plate 3. When the kneading drum 6 kneads the molybdenum powder, the reciprocating micro-telescopic hydraulic cylinder 54 extends and retracts, causing the linkage block 53 to move up and down. The linkage block 53 drives the swing plate 51 to swing back and forth via the connecting rod 52. The swing plate 51 drives the vortex scraper 5 to swing back and forth synchronously and alternately with small amplitude. This allows the vortex scraper 5 to press and break up the agglomerated molybdenum powder using the edges of its stepped structure on the lower side, further enhancing the breaking up of the agglomerates. The forward and reverse swing of the vortex scraper 5 can automatically adapt to the forward and reverse rotation of the vortex scraper 5, ensuring that the vortex scraper 5 can break up the agglomerated molybdenum powder in both directions of rotation. The intermittent swing of the vortex scraper 5 can prevent the kneading drum 6 from being in an inclined state for a long time, thereby ensuring the kneading effect of the kneading drum 6 on the molybdenum powder.

[0051] It should be emphasized that the swing angle of the vortex scraper 5 has been adjusted by those skilled in the art so that the vortex scraper 5 will not interfere with the screen of the vibrating screen 1 when it swings. In addition, since the air guide pipe 72 is connected to the vortex scraper 5 through a flexible hose, the air guide pipe 72 will not obstruct the swing of the vortex scraper 5.

[0052] To promote the dispersal of agglomerates and increase the contact opportunities between molybdenum powder and the screen of vibrating screen 1, the present invention designs the following structure: (See attached diagram) Figure 5 and Figure 6 The lower side of the kneading cylinder 6 is provided with air blowing holes 61 at equal intervals along its circumference. When the high-pressure gas inside the kneading cylinder 6 pushes the kneading cylinder 6 downward to extend to the lower side of the vortex scraper 5, the airflow inside the kneading cylinder 6 blows the molybdenum powder through the air blowing holes 61.

[0053] When the kneading drum 6 extends downward to the lower part of the vortex scraper 5, the air blowing hole 61 on the kneading drum 6 moves down to the outside of the vortex scraper 5, so that part of the high-speed airflow inside the kneading drum 6 flows out through the air blowing hole 61, thereby allowing the airflow to be blown towards the molybdenum powder through the air blowing hole 61, turning the molybdenum powder over during kneading, so that qualified fine material can pass through the screen in time, improving screening efficiency and finished product recovery rate.

[0054] This invention adds a kneading cylinder 6 and a vortex scraper 5 to the upper part of a traditional vibrating screen 1 to process molybdenum powder. This enables the active movement of molybdenum powder on the vibrating screen 1 and directly decomposes and disperses molybdenum powder agglomerates through active kneading. This allows fine materials with qualified particle size to pass through the screen in a timely and direct manner, ensuring screening efficiency while improving the purification and screening effect of molybdenum powder. Although this increases costs, there are no precision-fitting parts, and the cost is a one-time investment. The resulting high screening efficiency and quality can quickly offset the initial cost investment.

[0055] In addition, the present invention provides a method for purifying molybdenum concentrate, the steps of which are as follows: S1, pour the molybdenum powder to be screened and purified into the upper layer of the vibrating screen 1, lower the cover plate 3 to cover the vibrating screen 1, start the vibrating screen 1 to screen the molybdenum powder, and at the same time, alternately rotate the rotating cylinder 4 in both directions to scrape the molybdenum powder inside and outside through the vortex scraper 5, so as to make full use of the screen area of ​​the vibrating screen 1.

[0056] S2. After the vortex scraper 5 pushes the molybdenum powder inside and outside for a period of time, the rotating cylinder 4 moves upward and blows air into the kneading cylinder 6, so that the kneading cylinder 6 extends the vortex scraper 5 downward. At the same time, the vortex scraper 5 is kept to alternately rotate forward and backward, so that the kneading cylinder 6 gradually pushes the molybdenum powder to its lower end for kneading and dispersing through the spiral groove inclined surface on it.

[0057] S3. When kneading molybdenum powder with the kneading drum 6, the vortex scraper 5 alternately swings forward and backward, so that the vortex scraper 5 presses and divides the agglomerates from below, further breaking up the agglomerates.

[0058] S4. The broken agglomerated molybdenum powder is continuously pushed in and out by the vortex scraper 5, and is continuously contacted by the screen of the vibrating screen 1. It passes through the screen holes of the vibrating screen 1 and is screened downwards, thereby completing the purification.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A molybdenum concentrate purification and processing device, comprising a vibrating screen, characterized in that, A lifting plate is vertically slidably installed on the upper side of the vibrating screen, and a cover plate is fixedly installed on the lower side of the lifting plate. A rotating cylinder is rotatably installed at the axis position of the cover plate. A vortex scraper connected to the rotating cylinder is equidistantly arranged along its circumference on the lower side of the rotating cylinder. Several kneading cylinders are equidistantly arranged along its length and slidably connected to the vortex scraper. The purification device also includes an air-pressing mechanism. The air-pressing mechanism presses the kneading drum downwards onto the screen of the vibrating screen under the action of air pressure, thereby kneading and breaking up the agglomerates. A synchronous motor is fixedly installed on the upper side of the lifting plate. The output shaft of the synchronous motor is connected to the rotating drum through a belt mechanism. The synchronous motor drives the rotating drum to rotate alternately in the forward and reverse directions, which causes the vortex scraper to scrape the molybdenum powder on the vibrating screen in and out alternately. A swing plate is fixedly installed on the rotating shaft of the vortex scraper. A connecting rod is rotatably connected to the upper end of the swing plate. A linkage block that is rotatably connected to all the connecting rods is slidably arranged up and down on the inner side of the rotating cylinder. A hydraulic cylinder with a telescopic section that is rotatably connected to the linkage block is fixedly installed on the cover plate.

2. The molybdenum concentrate purification and processing device according to claim 1, characterized in that, The inflation mechanism includes an air inlet cover that is rotatably mounted on the upper side of the rotating drum, and an air guide pipe that is fixedly installed on the outside of the rotating drum and corresponds one-to-one with the vortex scraper. The air guide pipe is connected to the vortex scraper through a flexible hose for blowing air into the inside of the kneading drum.

3. The molybdenum concentrate purification and processing device according to claim 2, characterized in that, A hydraulic cylinder is installed between the vibrating screen and the lifting plate, and the air inlet cover pipe is connected to an external air pump.

4. The molybdenum concentrate purification and processing device according to claim 1, characterized in that, The kneading cylinder has a stepped structure with a larger diameter at the top and a smaller diameter at the bottom. The lower part of the kneading cylinder with a smaller diameter is slidably connected to and sealed with the vortex scraper.

5. The molybdenum concentrate purification and processing device according to claim 1, characterized in that, The lower side of the kneading cylinder is provided with air blowing holes at equal intervals along its circumference. When the gas inside the kneading cylinder pushes the kneading cylinder downwards to extend to the lower side of the vortex scraper, the airflow inside the kneading cylinder blows the molybdenum powder through the air blowing holes.

6. The molybdenum concentrate purification and processing device according to claim 1, characterized in that, The lower end of the kneading cylinder is provided with several spiral grooves at equal intervals along its circumference. When the vortex scraper rotates, the kneading cylinder gradually pushes the molybdenum powder to its lower end for kneading through the inclined surface of the spiral grooves.

7. The molybdenum concentrate purification and processing device according to claim 6, characterized in that, Several cutting plates with blades at their lower ends are fixedly installed on the spiral groove inclined surface of the kneading drum. The cutting plates are used to cut the molybdenum powder while the kneading drum is kneading it.

8. The molybdenum concentrate purification and processing device according to claim 1, characterized in that, The lower side of the vortex scraper has a stepped structure that is low in the middle and high on both sides. When kneading molybdenum powder, the vortex scraper swings back and forth, so that the edges of the stepped structure on the lower side of the vortex scraper break up the agglomerated molybdenum powder.

9. A method for purifying molybdenum concentrate, using the molybdenum concentrate purification apparatus according to any one of claims 1 to 8, characterized in that, The specific processing steps are as follows: S1. Pour the molybdenum powder to be screened and purified into the upper layer of the vibrating screen, lower the cover plate to cover the vibrating screen, start the vibrating screen to screen the molybdenum powder, and at the same time, alternately rotate the rotating drum in the forward and reverse directions to scrape the molybdenum powder inside and out through the vortex scraper to make full use of the screen area of ​​the vibrating screen. S2. After the vortex scraper pushes the molybdenum powder inside and outside for a period of time, the rotating cylinder moves upward, so that the kneading cylinder extends the vortex scraper downward. The vortex scraper alternates between forward and reverse rotation, so that the kneading cylinder kneads and disperses the molybdenum powder. S3. When kneading molybdenum powder with a kneading drum, the vortex scraper is alternately oscillating in both directions, so that the vortex scraper presses and divides the agglomerates from below, breaking up the agglomerates. S4. The broken agglomerated molybdenum powder is continuously pushed by the alternating inward and outward movement of the vortex scraper, and then passes through the screen holes of the vibrating screen for downward sieving, thereby completing the purification.

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