A horizontal screening device for regenerating composite chrome corundum

Abstract

The utility model provides a horizontal screening device for the preparation of regenerative composite chrome corundum, including the box, the synchronous rotation connection of box inside installation has the outer sieve cylinder and the inner sieve cylinder, the inner sieve cylinder is located the inside position of outer sieve cylinder, the circumferential direction of inner sieve cylinder and outer sieve cylinder all are equipped with the sieve hole of uniform arrangement, the sieve hole size on the inner sieve cylinder is greater than the sieve hole size on the outer sieve hole, installs the baffle respectively in the position above outer sieve cylinder and inner sieve cylinder, the utility model discloses a baffle mode is set in the top of outer sieve cylinder and inner sieve cylinder, and the baffle wraps the upper area of two sieve cylinders, on one hand can prevent the material movement to the upper part because of the sieve cylinder rotation, subsequently falls into the center sieve cylinder again The situation occurs, avoids the decline of work efficiency caused by the repeated screening of material, on the other hand still can utilize the structure that the baffle and sieve cylinder outer wall are pasted, the material that is stuck in the sieve hole is removed to a certain extent, improves the effect of screening.

Description

Technical Field

[0001] This utility model belongs to the technical field of chromium corundum production equipment, specifically relating to a horizontal screening device for the preparation of recycled composite chromium corundum. Background Technology

[0002] Composite chromium corundum is a refractory material made primarily of alumina with a certain proportion of chromium oxide, produced through high-temperature electrofusion. It combines the high strength and hardness of corundum with the excellent corrosion resistance and thermal stability imparted by chromium oxide, making it widely used in high-temperature industries such as steel and non-ferrous metal smelting. Recycled chromium corundum refers to raw materials that are reused after processing waste chromium corundum products generated during use, such as crushing and screening. This reduces production costs and achieves resource recycling, aligning with the trend of green and environmentally friendly development.

[0003] In the preparation of recycled chromium corundum, the crushed material needs to be screened to obtain raw materials of different particle sizes. A common screening method is the vibrating screen, but vibrating screens are noisy, energy-intensive, and have limited screening efficiency. Therefore, existing technologies often use horizontal screening equipment to replace vibrating screens. However, existing horizontal screening equipment still has drawbacks: it typically uses center feeding, with the material passing through multiple screen cylinders sequentially. For example, when three-stage screening is required, if the material in the first-stage screen cylinder is not completely screened, the remaining material will move directly to the tail end of the screen cylinder and fall off, causing a mixture of second- and third-stage materials to be discharged simultaneously through the second-stage outlet, resulting in untimely screening and poor performance. Furthermore, during the rotation of the screen cylinder, some of the screened material is carried to the top of the cylinder and falls back into the central screen cylinder, causing repeated screening and reducing overall efficiency. In addition, because the recycled chromium corundum raw material particles are irregularly shaped, they easily get stuck in the screen holes, which also seriously affects the screening effect. Utility Model Content

[0004] This utility model provides a horizontal high-power mixer for mining, which solves the problems mentioned in the background art of existing horizontal screening devices such as untimely screening, easy mixing of materials of different grades, low screening efficiency, and easy clogging of screen holes.

[0005] The technical solution adopted by this utility model is: a horizontal sieving device for the preparation of recycled composite chromium corundum, including a box body, an outer sieve cylinder and an inner sieve cylinder installed inside the box body and rotated synchronously, the inner sieve cylinder being located inside the outer sieve cylinder, and both the inner and outer sieve cylinders having uniformly arranged sieve holes in their circumferential direction, the size of the sieve holes on the inner sieve cylinder being larger than the size of the sieve holes on the outer sieve cylinder, baffles being installed above the outer sieve cylinder and the inner sieve cylinder respectively, the baffles being fixed inside the box body, the cross-section of the baffles being arc-shaped, the inner walls of the two baffles being in contact with the outer walls of the outer sieve cylinder and the inner sieve cylinder respectively, and the downward projection width of the two baffles being larger than the diameter of the outer sieve cylinder and the inner sieve cylinder respectively.

[0006] Both the outer and inner screen cylinders are conical structures. The inner screen cylinder has a feed inlet at one of its central ends. The inner diameter of the outer and inner screen cylinders gradually increases from the end closer to the feed inlet to the end farther away from the feed inlet.

[0007] A guide plate is installed on the side wall of the box body away from the feed inlet. The guide plate has an arc-shaped cross-section. The other end of the guide plate extends downward at an angle toward the feed inlet of the inner screen cylinder. The guide plate is located between the inner screen cylinder and the outer screen cylinder.

[0008] The width of the guide plate projected downwards is greater than the diameter of the inner screen cylinder.

[0009] It also includes a feeding mechanism installed at the feed inlet end of the housing and near the inner screen cylinder.

[0010] The feeding mechanism includes a conveying cylinder installed on the side wall of the box, a rotatable main shaft installed inside the conveying cylinder, spiral blades installed on the main shaft, and a feeding hopper installed above the conveying cylinder, with the feeding hopper communicating with the inner cavity of the conveying cylinder.

[0011] One end of the main shaft extends into the inner screen cylinder, and evenly distributed supports are installed around the circumference of the main shaft. The supports are connected to the inner screen cylinder, and are configured to drive the inner screen cylinder and the outer screen cylinder to rotate together when the main shaft rotates.

[0012] A fan is installed on the top of the enclosure, and a dust removal pipe is connected to the air outlet of the fan.

[0013] It also includes a primary discharge pipe, a secondary discharge pipe and a tertiary discharge pipe installed at the end of the box. The primary discharge pipe is connected to the inner cavity of the inner screen cylinder, the secondary discharge pipe is connected to the inner cavity of the outer screen cylinder, and the tertiary discharge pipe is connected to the inner cavity at the bottom of the box.

[0014] The inner bottom wall of the box is an inclined surface.

[0015] The beneficial effects of this utility model are as follows: This invention uses baffles at the top of the outer and inner screen cylinders, which cover the upper part of both screen cylinders. This prevents materials from being moved to the top by the rotation of the screen cylinders and then falling back into the central screen cylinder, thus avoiding repeated screening and reducing work efficiency. On the other hand, the structure of the baffles fitting against the outer wall of the screen cylinders can remove some of the materials stuck in the screen holes, improving the screening effect.

[0016] This invention features a guide plate in the area between the inner and outer screen cylinders, allowing the material screened at the tail of the inner cylinder to move along the guide plate to the middle or front of the outer screen cylinder. This prevents the mixed secondary and tertiary materials from being discharged from the secondary discharge pipe due to insufficient screening time, thus improving the screening effect. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a longitudinal sectional view of the present invention; Figure 3 This is a perspective view of the outer baffle of this utility model.

[0018] in: 1. Box body; 2. Outer screen cylinder; 3. Inner screen cylinder; 4. Guide plate; 5. Primary discharge pipe; 6. Secondary discharge pipe; 7. Tertiary discharge pipe; 8. Support; 9. Main shaft; 10. Inner baffle; 11. Outer baffle; 12. Fan; 13. Dust removal pipe; 14. Feed hopper; 15. Motor; 16. Spiral blades; 17. Conveying cylinder. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As shown in the figure, a horizontal screening device for the preparation of recycled composite chromium corundum includes a housing 1. Inside the housing 1, an outer screen cylinder 2 and an inner screen cylinder 3 are installed and rotated synchronously. The inner screen cylinder 3 is located inside the outer screen cylinder 2. Both the inner screen cylinder 3 and the outer screen cylinder 2 have uniformly arranged screen holes in their circumference. The size of the screen holes on the inner screen cylinder 3 is larger than that on the outer screen cylinder. Both the outer screen cylinder 2 and the inner screen cylinder 3 are conical structures. The inner screen cylinder 3 has a feed inlet at one of its central ends. The inner diameter of the outer screen cylinder 2 and the inner screen cylinder 3 gradually increases from the end closer to the feed inlet to the end farther away from the feed inlet. After the inner screen cylinder 3 and the outer screen cylinder 2 are fixedly connected to form an integral double-layer cylinder structure, they are installed inside the housing 1 by bearings. The outer screen cylinder 2 and the inner screen cylinder 3 are designed as conical structures so that during the rotation of the two screen cylinders and the screening of materials, the material on the screen can gradually move from the feed inlet to the outlet, achieving the effect of continuous feeding and screening.

[0021] Baffles are installed above the outer screen cylinder 2 and the inner screen cylinder 3, respectively. The baffles are fixed inside the housing 1 and have an arc-shaped cross-section. Specifically, the two baffles are the outer baffle 11 located at the top of the outer screen cylinder 2 and the inner baffle 10 located at the top of the inner screen cylinder 3. The inner walls of the two baffles are in contact with the outer walls of the outer screen cylinder 2 and the inner screen cylinder 3, respectively. The downward projection width of the two baffles is greater than the diameter of the outer screen cylinder 2 and the inner screen cylinder 3, respectively. That is, the two baffles cover the top of the two screen cylinders. With this arrangement, when the material moves to the top position with the screen cylinder (specifically the outer screen cylinder 2), the screened material falling downwards can be blocked by the inner baffle 10, preventing the material from re-entering the inner screen cylinder 3 and causing repeated screening. In addition, since the two baffles are in contact with the two screen cylinders, that is, the two screen cylinders and the baffles can slide relative to each other, when the material stuck at the screen hole comes into contact with the baffle, the baffle can be used to remove the material from the screen hole, which is beneficial to improving the screening effect. To prevent material from getting stuck in contact with the baffles, the edges of the two baffles near the screen cylinder can be designed with a chamfered structure.

[0022] A guide plate 4 is installed on the side wall of the box body 1 away from the feed inlet. The cross-section of the guide plate 4 is arc-shaped. The other end of the guide plate 4 extends downward at an angle towards the feed inlet of the inner screen cylinder 3. The guide plate 4 is located between the inner screen cylinder 3 and the outer screen cylinder 2. Specifically, the width of the downward projection of the guide plate 4 is greater than the diameter of the inner screen cylinder 3. That is, the undersize material screened near the tail of the inner screen cylinder 3 can move along the guide plate 4 to the middle or front area of ​​the outer screen cylinder 2, so that the material can have enough time to be screened in the outer screen cylinder 2, thereby avoiding the secondary and tertiary mixtures from being discharged from the secondary discharge pipe 6 due to insufficient screening time.

[0023] It also includes a feeding mechanism installed at the inlet end of the housing 1 and close to the inner screen cylinder 3. Specifically, the feeding mechanism includes a conveying cylinder 17 installed on the side wall of the housing 1. A rotatable main shaft 9 is installed inside the conveying cylinder 17. A spiral blade 16 is installed on the main shaft 9. A feeding hopper 14 is installed above the conveying cylinder 17. The feeding hopper 14 is connected to the inner cavity of the conveying cylinder 17. A motor 15 connected to the main shaft 9 is installed outside the conveying cylinder 17. After the motor 15 is started, it drives the main shaft 9 to rotate, and the material can be fed into the inner screen cylinder 3 by spiral conveying.

[0024] One end of the main shaft 9 extends into the inner screen cylinder 3, and the main shaft 9 is equipped with evenly distributed supports 8 in the circumferential direction. The supports 8 are connected to the inner screen cylinder 3 and are configured to drive the inner screen cylinder 3 and the outer screen cylinder 2 to rotate simultaneously when the main shaft 9 rotates. With this configuration, the material conveying and the rotation of the two screen cylinders can be achieved through one main shaft 9, which has the advantages of simple structure and low cost.

[0025] A fan 12 is installed on the top of the box 1, and a dust removal pipe 13 is connected to the air outlet of the fan 12. Since dust is generated during the screening process, the installation of the fan 12 on the top of the box 1 can achieve the dust removal effect.

[0026] It also includes a primary discharge pipe 5, a secondary discharge pipe 6 and a tertiary discharge pipe 7 installed at the end of the box body 1. The primary discharge pipe 5 is connected to the inner cavity of the inner screen cylinder 3, the secondary discharge pipe 6 is connected to the inner cavity of the outer screen cylinder 2, and the tertiary discharge pipe 7 is connected to the inner cavity at the bottom of the box body 1.

[0027] The inner bottom wall of the box 1 is an inclined surface. When the tertiary material is screened down from the outer screen cylinder 2, it can fall to the bottom of the box 1 and move along the inclined surface to the tertiary discharge pipe 7 for discharge.

[0028] In operation, this horizontal screening device for the preparation of recycled composite chromium corundum is used as follows: The crushed material to be screened is first fed into the feed hopper 14. Driven by the motor 15, the main shaft 9 rotates the spiral blades 16, thereby conveying the material along the conveying cylinder 17 to the feed inlet of the inner screen cylinder 3. With the linkage between the extended end of the main shaft 9 and the support 8, the main shaft 9 can simultaneously drive the inner screen cylinder 3 and the outer screen cylinder 2 to rotate synchronously while conveying the material.

[0029] The material fed into the inner screen cylinder 3 gradually moves towards the tail end of the inner screen cylinder 3 under the action of the cylinder rotation and its own gravity, and is screened through the screen holes during the movement. Since the screen hole size of the inner screen cylinder 3 is larger than that of the outer screen cylinder 2, the inner screen cylinder 3 can achieve primary coarse screening of the material. The small particles that pass through the screen enter the outer screen cylinder 2, while the large particles that fail to pass through the screen holes of the inner screen cylinder 3 are finally discharged through the primary discharge pipe 5.

[0030] The material entering the outer screen cylinder 2 moves further towards the tail end under its rotation, and is screened a second time through the smaller screen holes on the outer screen cylinder 2 during the movement. Fine particles that can pass through the screen holes of the outer screen cylinder 2 fall to the bottom of the box 1 and are collected along the bottom inclined surface to the third-stage discharge pipe 7, thereby realizing the collection of third-stage materials; while intermediate-sized particles that fail to pass through the screen holes of the outer screen cylinder 2 are finally discharged through the second-stage discharge pipe 6.

[0031] When the material rotates to the top position with the cylinder, if any screened particles are carried to a high position due to the rotation, the inner baffle 10 can block them, thereby preventing the material from falling back into the inner screen cylinder 3 and causing repeated screening. At the same time, the two baffles keep in contact with the outer wall of the corresponding screen cylinder. When there is stuck material at the screen hole, the baffle can remove the stuck material during the relative sliding process with the cylinder wall, which plays a role in preventing blockage and effectively improving the screening effect.

[0032] In addition, the guide plate 4 near the tail end of the inner screen cylinder 3 can guide the material under screening at the tail end, so that it falls back into the middle or front area of ​​the outer screen cylinder 2, thereby providing the material with a longer movement and screening time in the outer screen cylinder 2, and preventing materials of different grades from being discharged together due to insufficient separation time.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A horizontal screening device for the preparation of recycled composite chromium corundum, characterized in that, The device includes a housing, inside which are installed an outer screen cylinder and an inner screen cylinder that are synchronously rotated and connected. The inner screen cylinder is located inside the outer screen cylinder. Both the inner and outer screen cylinders have uniformly arranged screen holes along their circumference. The size of the screen holes on the inner screen cylinder is larger than that on the outer screen cylinder. Baffles are installed above the outer and inner screen cylinders respectively. The baffles are fixed inside the housing and have an arc-shaped cross-section. The inner walls of the two baffles are in contact with the outer walls of the outer and inner screen cylinders respectively. The downward projection width of the two baffles is larger than the diameter of the outer and inner screen cylinders respectively.

2. The horizontal screening device for preparing recycled composite chromium corundum according to claim 1, characterized in that, Both the outer and inner screen cylinders are conical structures. The inner screen cylinder has a feed inlet at one end of its center. The inner diameter of the outer and inner screen cylinders gradually increases from the end closer to the feed inlet to the end farther away from the feed inlet.

3. A horizontal screening device for preparing recycled composite chromium corundum according to claim 2, characterized in that, A guide plate is installed on the side wall of the box away from the feed inlet. The cross-section of the guide plate is arc-shaped. The other end of the guide plate extends downward at an angle towards the feed inlet of the inner screen cylinder. The guide plate is located between the inner screen cylinder and the outer screen cylinder.

4. A horizontal screening device for preparing recycled composite chromium corundum according to claim 1, characterized in that, The width of the guide plate projected downwards is greater than the diameter of the inner screen cylinder.

5. A horizontal screening device for preparing recycled composite chromium corundum according to claim 1, characterized in that, It also includes a feeding mechanism installed at the inlet end of the housing near the inner screen cylinder.

6. A horizontal screening device for preparing recycled composite chromium corundum according to claim 5, characterized in that, The feeding mechanism includes a conveying cylinder installed on the side wall of the box, a rotatable main shaft installed inside the conveying cylinder, spiral blades installed on the main shaft, and a feeding hopper installed above the conveying cylinder, with the feeding hopper communicating with the inner cavity of the conveying cylinder.

7. A horizontal screening device for preparing recycled composite chromium corundum according to claim 6, characterized in that, One end of the main shaft extends into the inner screen cylinder, and evenly distributed supports are installed around the circumference of the main shaft. The supports are connected to the inner screen cylinder, and are configured to drive both the inner and outer screen cylinders to rotate simultaneously when the main shaft rotates.

8. A horizontal screening device for preparing recycled composite chromium corundum according to claim 7, characterized in that, A fan is installed on the top of the enclosure, and a dust removal pipe is connected to the fan's outlet.

9. A horizontal screening device for preparing recycled composite chromium corundum according to claim 1, characterized in that, It also includes a primary discharge pipe, a secondary discharge pipe and a tertiary discharge pipe installed at the end of the box. The primary discharge pipe is connected to the inner cavity of the inner screen cylinder, the secondary discharge pipe is connected to the inner cavity of the outer screen cylinder, and the tertiary discharge pipe is connected to the inner cavity at the bottom of the box.

10. A horizontal screening device for preparing recycled composite chromium corundum according to claim 1, characterized in that, The bottom wall of the box is sloping.

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