A wet screening and impurity removal device for laterite nickel ore

Abstract

This invention provides a wet screening and impurity removal device for laterite nickel ore, comprising a frame, with blade shafts evenly arranged in rows inside the frame. Both ends of the blade shafts are rotatably connected to anti-reverse devices inside the frames on both sides. A first and second geared motor group are rotatably connected to the outer side of the anti-reverse devices. A connecting plate is installed between the two ends of the frame, with fixed blades installed inside the connecting plate. A conveyor slope is installed below one side of the frame, with its lower end facing the return ore belt. Multiple belt drive shafts are installed inside the return ore belt, with its end facing the raw material discharge port. This invention, by using 10 5.5kW geared motors at the front end and 18 4kW geared motors at the rear end, ensures stable discharge speed, saves energy, avoids waste, and reduces costs. Furthermore, each geared motor controls one blade shaft, and the gap between the rotating blades on the blade shafts is fixed, ensuring a stable separation particle size of 100mm, thus efficiently separating foreign matter from nickel ore.

Description

Technical Field

[0001] This utility model relates to the technical field of laterite nickel ore screening devices, specifically a wet screening and impurity removal device for laterite nickel ore. Background Technology

[0002] Nickel is an important strategic metal, possessing good toughness and ductility, as well as high temperature resistance, corrosion resistance, and strong chemical stability. It is widely used in numerous fields of military manufacturing and civilian industry. The main process for processing laterite nickel ore is the rotary kiln-electric arc furnace (RKEF) process. Electric arc furnace smelting has strict requirements for the selection of laterite nickel ore, generally requiring a nickel content greater than 2% and an iron content less than 25%, for smelting high-nickel ferroalloys with a nickel content greater than 15%. Using low-grade laterite nickel ore would significantly increase the smelting cost of the RKEF process and reduce economic efficiency.

[0003] However, due to the high crystal water content and viscosity of laterite nickel ore, as well as the unstable chemical properties between different types of ore, the sintering process suffers from poor permeability, high energy consumption, and low yield. The laterite nickel ore has a high water content of 35%, resulting in a large amount of stones and debris in the raw material. When large stones and debris enter the raw material feeding system, they cause blockages at the discharge port, requiring frequent cleaning. This leads to low efficiency, increases the workload of workers, and the large stones entering the feeding conveyor belt increase the belt load, leading to increased equipment load. Irregular stones or debris can cause belt tears or jamming, requiring frequent equipment replacement and maintenance, resulting in a significant increase in costs. Utility Model Content

[0004] The purpose of this invention is to provide a wet screening and impurity removal device for laterite nickel ore to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wet screening and impurity removal device for laterite nickel ore includes:

[0007] The frame has blade shafts evenly arranged in rows inside. The two ends of the blade shafts are rotatably connected to anti-reverse devices inside the two side frames. The outer side of the anti-reverse devices is rotatably connected to a first geared motor group and a second geared motor group. A connecting plate is installed between the two ends of the frame. A fixed blade is installed inside the connecting plate. A conveyor slope is installed below one side of the frame. The lower end of the conveyor slope faces the return ore belt. Multiple belt drive shafts are installed inside the return ore belt. The end of the return ore belt faces the raw material discharge port.

[0008] Preferably, the first geared motor assembly includes a first geared motor, and the output end of the first geared motor is rotatably connected to a first coupling.

[0009] Preferably, the second geared motor assembly includes a second geared motor, and the output end of the second geared motor is rotatably connected to a second coupling.

[0010] Preferably, rotating blades are evenly spaced on the blade shaft.

[0011] Preferably, the frame and the first support are fixedly connected by an H-shaped connecting steel, the first and second geared motor sets are connected to the blade shaft, the blade shaft and the motor sets are connected by bearings, and the bearings are connected in bearing seats.

[0012] Preferably, a third bracket is fixedly installed on both sides of the conveying slope by bolts.

[0013] Preferably, a drive motor is connected to the outside of the belt drive shaft.

[0014] Preferably, the first geared motor group is located in the front half of the device, and the output power of the first geared motor is 5.5kw. The second geared motor group is located in the rear half of the device, and the output power of the second geared motor is 4kw.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses 10 5.5kW geared motors at the front end and 18 4kW geared motors at the rear end to ensure stable discharge speed, save energy and avoid waste, thereby reducing costs. Furthermore, each geared motor controls one blade shaft, and the gap between the rotating blades on the blade shafts is fixed, so that the separation particle size is stable at 100mm, thus efficiently separating foreign objects from nickel ore.

[0017] In this invention, the rotating blade is made of wear-resistant material, and the blade shaft and the geared motor are connected by a coupling. At the same time, anti-backflow devices are installed on both sides of the shaft to ensure the stable operation of the rotating blade shaft during operation, prevent the blade shaft and rotating blade from falling off, increase the service life of the equipment, reduce the number of maintenance times, and thus reduce costs. Attached Figure Description

[0018] Figure 1 This is a front view of the overall structure of this utility model connected to the chain plate feeder;

[0019] Figure 2 This is a top view of the overall structure of this utility model and its connection with the chain plate feeder;

[0020] Figure 3 This is a top view of the impurity removal device of this utility model;

[0021] Figure 4 Side view of the installation of the return ore conveyor belt and impurity removal device of this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram showing the connection of the first set of blade shaft, rotating blade, coupling and geared motor group of this utility model.

[0023] Figure 6 This is a three-dimensional schematic diagram showing the connection between the second set of blade shaft, rotating blade, coupling and geared motor group of this utility model.

[0024] In the diagram: 1-Frame; 101-Connecting plate; 102-Fixed blade; 103-First support; 105-H-type connecting steel; 2-First geared motor unit; 201-First geared motor; 202-First coupling; 203-Bearing seat; 3-Second geared motor unit; 301-Second geared motor; 302-Second coupling; 4-Anti-reverse device; 401-Anti-reverse washer; 5-Blade shaft; 501-Rotating blade; 6-Return ore belt; 7-Belt drive shaft; 701-Second support; 8-Feeding slope; 9-Third support; 10-Raw material discharge port; 11-Chain plate feeder. Detailed Implementation

[0025] 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.

[0026] Example:

[0027] Please see Figures 1 to 3 This utility model provides a technical solution:

[0028] A wet screening and impurity removal device for laterite nickel ore includes:

[0029] The frame 1 has blade shafts 5 evenly arranged inside. The two ends of the blade shafts 5 are rotatably connected to anti-reverse devices 4 inside the two sides of the frame 1. The outer side of the anti-reverse devices 4 is rotatably connected to a first reduction motor group 2 and a second reduction motor group 3. A connecting plate 101 is installed between the two ends of the frame 1. A fixed blade 102 is installed inside the connecting plate 101. A conveying slope 8 is installed below one side of the frame 1. The lower end of the conveying slope 8 faces the return ore belt 6. Multiple belt drive shafts 7 are installed inside the return ore belt 6. The end of the return ore belt 6 faces the raw material discharge port 10.

[0030] In this embodiment, the front half of the frame 1 is provided with 10 sets of first geared motor sets 2 at even intervals, and the rear half is provided with 18 sets of second geared motor sets 3 at even intervals (e.g., ...). Figure 1 The first geared motor 201 of the first geared motor group 2 is a 5.5kw geared motor, and the second geared motor 301 of the second geared motor group 3 is a 4kw geared motor. There are 18 such motors. When the laterite nickel ore enters the impurity removal device, the material is conveyed forward as the blade shaft 5 rotates, and some material falls from between the blade shaft 5, so that the forward load of the entire device gradually decreases and the required motor power is relatively reduced. By reducing the power of the geared motors in the second geared motor group 3, energy can be saved and waste can be avoided while ensuring a stable discharge speed, thereby reducing costs.

[0031] Specifically, the first geared motor assembly 2 includes a first geared motor 201, and the output end of the first geared motor 201 is rotatably connected to a first coupling 202.

[0032] Specifically, the second geared motor group 3 includes a second geared motor 301, and the output end of the second geared motor 301 is rotatably connected to a second coupling 302.

[0033] The first geared motor group 2 is located in the front half of the device, and the output power of the first geared motor 201 is 5.5kw. The second geared motor group 3 is located in the rear half of the device, and the output power of the second geared motor 301 is 4kw.

[0034] The preferred model for the first geared motor 201 is R08-17.08-5.5KW / 4P-M1.

[0035] The preferred second geared motor 301 is model TR78-17.82-4KW / 4P-M1.

[0036] Specifically, the first coupling 202 and the second coupling 302 are nylon rod pin couplings, which have a simple structure, are easy to manufacture, do not require lubrication, do not require vulcanization bonding with metal, are easy to replace the elastic sleeve, do not require moving the half coupling, and have a certain compensation for relative misalignment of the two shafts and vibration damping buffer performance.

[0037] In this embodiment, both the first geared motor group 2 and the second geared motor group 3 are connected to a blade shaft 5. The spacing between each transmission shaft is controlled at 180mm. Multiple rotating blades 501 are evenly spaced on the blade shaft 5, and the spacing between the rotating blades 501 on adjacent blade shafts 5 is fixed (e.g., ...). Figure 1The impurity removal device separates particles up to 100mm. When the blade shaft 5 rotates, the rotating blade 501 moves the material forward while scraping off the laterite nickel ore from the stones. Mud and stones ≤100mm fall from the gap of the rotating blade 501 to the bottom of the frame 1 and are transported to the raw material discharge port 10 via the return ore belt 6. Materials >100mm in diameter move forward and fall to one side of the impurity removal device, piling up outside the discharge port. They are then transported by a loader to the crusher discharge port for crushing, thus allowing the laterite nickel ore to enter the next process. Larger stones are transported to the impurity removal device, thereby quickly completing the screening and impurity removal of the laterite nickel ore.

[0038] Specifically, rotating blades 501 are evenly spaced on the blade shaft 5.

[0039] Specifically, the rotating blade 501 is a wear-resistant blade made of 14mm Mn13 steel plate, which has a long service life.

[0040] Specifically, the frame 1 and the first support 103 are fixedly connected by an H-shaped connecting steel 105. The first reduction motor group 2 and the second reduction motor group 3 are connected to the blade shaft 5. The blade shaft 5 and the motor group are connected by a bearing, which is connected in the bearing seat 203.

[0041] In this embodiment, since the amount of laterite nickel ore in the latter half is reduced, a conveying slope 8 is set below the frame 1 so that the laterite nickel ore in the latter half falls onto the conveying slope 8, thereby reducing the length of the return belt 6 and reducing the energy required to maintain operation.

[0042] Specifically, the two sides of the conveying slope 8 are fixedly installed with third brackets 9 by bolts.

[0043] Specifically, a drive motor is connected to the outside of the belt drive shaft 7, and the belt drive shaft 7 is rotatably connected to the second bracket 701.

[0044] Specifically, the anti-reverse device 4 consists of an anti-reverse screw, an anti-reverse nut, and an anti-reverse washer 401, which can prevent the stability of the rotating blade 501 during the rotation of the blade shaft 5 and prevent the rotating blade 501 and the blade shaft 5 from loosening and falling off.

[0045] Specifically, both the first geared motor group 2 and the second geared motor group 3 are equipped with protective shells (not shown in the figure).

[0046] Specifically, the impurity removal device is fed by a chain plate feeder 11 (e.g., Figure 1The chain plate feeder 11 can uniformly and stably convey laterite nickel ore to the impurity removal device, ensuring the continuous operation of the impurity removal device and avoiding problems such as unstable load on the cutter shaft due to uneven feeding. The chain plate feeder 11 has high structural strength and is suitable for conveying materials with certain particle size and weight, such as laterite nickel ore. It can effectively reduce the wear of materials on the equipment and extend the service life of the equipment. The preferred chain plate feeder 11 is GBL-500, which has strong conveying capacity, stable and reliable operation, and relatively convenient maintenance.

[0047] In use, the laterite nickel ore is fed from the side of the first reduction motor unit 2 above the frame 1 to the impurity removal device via the chain plate feeder 11. The laterite nickel ore gradually moves forward under the drive of the blade shaft 5 and the rotating blade 501 on the blade shaft 5. At the same time, the rotating blade 501 scrapes the laterite nickel ore off the stone. Mud and stone that meet the specifications (material ≤100mm) fall from the gap of the rotating blade 501 to the bottom of the frame 1 and are conveyed to the raw material discharge port 10 via the return ore belt 6. Meanwhile, materials with a diameter >100mm move forward and fall to the side of the impurity removal device, piled up outside the discharge port, and are transferred to the crusher discharge port by a loader for crushing.

[0048] All other parts of this utility model not described herein are the same as existing technology, or are known technology, or can be implemented using existing technology, and will not be described in detail here.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for wet screening and removing impurities from laterite nickel ore, characterized by, include: The frame (1) has blade shafts (5) arranged in even rows inside the frame (1). The two ends of the blade shafts (5) are rotatably connected to the anti-reverse devices (4) inside the two side frames (1). The outer side of the anti-reverse devices (4) is rotatably connected to the first reduction motor group (2) and the second reduction motor group (3). A connecting plate (101) is installed between the two ends of the frame (1). A fixed blade (102) is installed on the inner side of the connecting plate (101). A conveying slope (8) is installed below one side of the frame (1). The lower end of the conveying slope (8) faces the return ore belt (6). Multiple belt drive shafts (7) are installed inside the return ore belt (6). The end of the return ore belt (6) faces the raw material discharge port (10).

2. The device for screening and removing impurities of laterite nickel ore by wet method according to claim 1, characterized in that: The first geared motor assembly (2) includes a first geared motor (201), and the output end of the first geared motor (201) is rotatably connected to a first coupling (202).

3. The device for screening and removing impurities of laterite nickel ore by wet method according to claim 1, characterized in that: The second geared motor assembly (3) includes a second geared motor (301), and the output end of the second geared motor (301) is rotatably connected to a second coupling (302).

4. The wet screening and impurity removal device for laterite nickel ore according to claim 1, characterized in that: Rotating blades (501) are evenly spaced on the blade shaft (5).

5. The wet screening and impurity removal device for laterite nickel ore according to claim 1, characterized in that: The frame (1) is fixedly connected to the first support (103) by an H-shaped connecting steel (105). The first geared motor group (2) and the second geared motor group (3) are connected to the blade shaft (5). The blade shaft (5) is connected to the motor group by a bearing. The bearing is connected in the bearing seat (203).

6. The wet screening and impurity removal device for laterite nickel ore according to claim 1, characterized in that: The material conveying slope (8) is fixed to both sides by bolts with a third bracket (9).

7. The wet screening and impurity removal device for laterite nickel ore according to claim 1, characterized in that: A drive motor is connected to the outside of the belt drive shaft (7).

8. The wet screening and impurity removal device for laterite nickel ore according to claim 1, characterized in that: The first geared motor group (2) is located in the front half of the device, and the output power of the first geared motor (201) is 5.5kw. The second geared motor group (3) is located in the rear half of the device, and the output power of the second geared motor (301) is 4kw.

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