A laterite nickel ore stage washing line

Abstract

The application discloses a lateritic nickel ore level ore washing line, which comprises ore washing equipment and ore dressing equipment arranged in a ladder level along a ladder-shaped mountain; the ore washing equipment comprises a chain plate feeder, a cylinder ore washing machine and a double-spiral scrubbing machine connected in sequence from top to bottom along the ladder-shaped mountain; the ore dressing equipment comprises a cyclone, a spiral chute, a shaking table and a magnetic separator connected in sequence from top to bottom along the ladder-shaped mountain; wherein the slurry outlet of the double-spiral scrubbing machine is connected with the cyclone. The application is constructed based on the ladder-shaped mountain, so that the ore slurry between the equipment flows naturally from the upper equipment to the lower equipment under the action of gravity, the power source for ore slurry transportation is avoided to be additionally arranged, the energy consumption of ore slurry driving is reduced, and then the construction cost and the later operation cost are reduced. Meanwhile, the above equipment is carried by the ladder-shaped mountain, the construction cost of the equipment rack body is reduced, and thus the overall construction cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of laterite nickel ore processing equipment, specifically to a laterite nickel ore layer washing line. Background Technology

[0002] Lateritic nickel ore is a loose, clayey aggregate containing oxides of elements such as nickel, iron, magnesium, cobalt, silicon, and aluminum, formed from nickel-bearing olivine bedrock in tropical or subtropical regions through long-term weathering, leaching, dissemination, and alteration. The iron in it is severely oxidized to a +3 valence state, giving it an overall reddish-brown appearance, hence the name lateritic nickel ore. Unlike sulfide nickel ore, lateritic nickel ore is a difficult-to-process oxide ore, and nickel cannot be effectively enriched through beneficiation methods; therefore, washing is necessary.

[0003] Patent CN111545341A describes a chromium removal process for laterite nickel ore, comprising S1, a washing process, and S2, a chromium beneficiation process. The laterite nickel ore is washed to separate a raw ore slurry with a particle size of -1.5 mm. This slurry is then further classified into coarse raw ore slurries with particle sizes ranging from +0.058 mm to -1.5 mm. The coarse raw ore slurry enters a spiral chute to obtain tailings and concentrate. The concentrate is screened on a first-stage shaking table to obtain first-stage shaking table tailings and first-stage shaking table concentrate. The first-stage shaking table concentrate is then further screened on a second-stage shaking table to obtain second-stage shaking table tailings, second-stage shaking table middlings, and second-stage shaking table concentrate. The second-stage shaking table middlings are ground and then returned to the second-stage shaking table for further screening. The first-stage and second-stage shaking table tailings are ground and then subjected to magnetic separation.

[0004] However, the existing technologies mentioned above mostly use power sources to transport slurry between various devices, resulting in high energy consumption and high production costs. Utility Model Content

[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a laterite nickel ore layer washing line to solve the technical problem that the slurry between various devices in the existing technology is mostly transported by power sources, resulting in high energy consumption and high production costs.

[0006] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:

[0007] This application provides a laterite nickel ore stratification washing line, including washing equipment and beneficiation equipment arranged in a stepped manner along a stepped mountain;

[0008] The ore washing equipment includes a chain plate feeder, a cylindrical ore washing machine, and a double spiral scrubbing machine connected sequentially from top to bottom along the stepped mountain.

[0009] The mineral processing equipment includes a hydrocyclone, a spiral chute, a shaking table, and a magnetic separator connected sequentially from top to bottom along the stepped mountain.

[0010] The slurry outlet of the twin-spiral scrubbing machine is connected to the hydrocyclone.

[0011] In some embodiments, the ore washing equipment and the ore beneficiation equipment are arranged sequentially from top to bottom along the stepped mountain.

[0012] In some embodiments, the ore washing equipment and the ore beneficiation equipment are arranged alternately on the mountainside, and the slurry outlet of the double spiral scrubbing machine is connected to the hydrocyclone through a feed pump.

[0013] In some embodiments, the cylindrical washing machine has a first inlet, a first outlet, and a second outlet. The first outlet is used to discharge large-sized gravel, and the second outlet is used to discharge slurry. The second outlet is connected to the feed end of the twin-spiral scrubbing machine.

[0014] In some embodiments, the laterite nickel ore washing line further includes a first conveyor belt connected to the first outlet.

[0015] In some embodiments, the twin-spiral scrubbing machine has a second inlet, a third outlet, and a fourth outlet. The second inlet is connected to the cylindrical washing machine, the third outlet is used to discharge small-sized gravel, and the fourth outlet is used to discharge slurry. The fourth outlet is connected to the hydrocyclone via a feed pump.

[0016] In some embodiments, the ore washing equipment further includes a linear vibrating screen located downstream of the twin-spiral scrubber, the third outlet being connected to the feed end of the linear vibrating screen, and the slurry outlet of the linear vibrating screen being connected to the hydrocyclone via a feed pump.

[0017] In some embodiments, the ore washing equipment further includes a mixing tank, the feed end of which is connected to the fourth outlet and the slurry outlet of the linear vibrating screen, and the discharge end of which is connected to the hydrocyclone via a feed pump.

[0018] In some embodiments, the laterite nickel ore washing line further includes a second conveyor belt connected to the gravel outlet of the linear vibrating screen.

[0019] In some embodiments, multiple shaking tables are provided, and the multiple shaking tables are arranged sequentially from top to bottom along the mountainside.

[0020] Compared with existing technologies, the laterite nickel ore tiered washing line provided in this application features a chain plate feeder, a cylindrical washing machine, and a double-spiral scrubbing machine arranged in a stepped configuration along the mountainside from top to bottom. Similarly, the hydrocyclone, spiral chute, shaking table, and magnetic separator are also arranged in a stepped configuration along the mountainside. The cylindrical washing machine and double-spiral scrubbing machine are used for washing ore and screening gravel, while the hydrocyclone, spiral chute, shaking table, and magnetic separator are used for slurry gravity separation. The combined use of washing and beneficiation equipment serves as a pre-processing step for laterite nickel ore. Furthermore, the stepped arrangement of the equipment along the mountainside allows the slurry to flow naturally from the upper to the lower equipment under gravity, eliminating the need for an additional power source for slurry transport, reducing energy consumption for slurry driving, and thus lowering beneficiation operating costs. Moreover, using the stepped mountainside to support the equipment reduces the cost of constructing the equipment frame, thereby lowering the overall construction cost.

[0021] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it according to the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. The specific implementation methods of this application are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a flowchart of an embodiment of a laterite nickel ore layer washing line provided in this application;

[0023] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a washing line for laterite nickel ore layers;

[0024] Figure 3 This is a flowchart of another embodiment of the laterite nickel ore layer washing line provided in this application;

[0025] Figure 4 yes Figure 3 A three-dimensional schematic diagram of a washing line for laterite nickel ore layers.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Chain plate feeder, 2-Cylindrical ore washing machine, 3-Double spiral scrubbing machine, 4-Linear vibrating screen, 5-Agitator, 6-Hydrocyclone, 7-Spiral chute, 8-Shaking table, 9-Concentrate pump tank, 10-Magnetic separator. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] To address the technical problem of high energy consumption and production costs caused by the use of power sources for slurry transportation between various devices in existing technologies, this application provides a laterite nickel ore layered washing line. The equipment is arranged in a stepped, tiered manner along a stepped mountain slope, allowing the slurry to flow naturally from the upper to the lower equipment under gravity. This eliminates the need for additional power sources for slurry transportation, reducing energy consumption for slurry driving and thus lowering beneficiation operating costs. Furthermore, using the stepped mountain slope to support the equipment reduces the cost of constructing the equipment frame, thereby lowering the overall construction cost.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a laterite nickel ore washing line in one embodiment of this application.

[0031] This application provides a laterite nickel ore stratified washing line, including washing equipment and beneficiation equipment arranged in a stepped manner along a stepped mountain; the washing equipment includes a chain plate feeder 1, a cylindrical washing machine 2, and a double spiral scrubbing machine 3 connected sequentially from top to bottom along the stepped mountain; the beneficiation equipment includes a hydrocyclone 6, a spiral chute 7, a shaking table 8, and a magnetic separator 10 connected sequentially from top to bottom along the stepped mountain; wherein, the slurry outlet of the double spiral scrubbing machine 3 is connected to the hydrocyclone 6.

[0032] In this embodiment, the chain feeder 1, the cylindrical washing machine 2, and the double spiral scrubbing machine 3 are arranged in a stepped manner from top to bottom along the mountain. Similarly, the hydrocyclone 6, the spiral chute 7, the shaking table 8, and the magnetic separator 10 are also arranged in a stepped manner from top to bottom along the mountain. The cylindrical washing machine 2 and the double spiral scrubbing machine 3 are used for washing ore and screening gravel, while the hydrocyclone 6, the spiral chute 7, the shaking table 8, and the magnetic separator 10 are used for slurry gravity separation. The combined use of the washing and beneficiation equipment serves as a pre-processing step for laterite nickel ore. Furthermore, the stepped arrangement of these devices along the mountain allows the slurry to flow naturally from the upper to the lower devices under gravity, avoiding the need for an additional power source for slurry transport, reducing energy consumption for slurry driving, and thus lowering beneficiation operating costs. Moreover, using the stepped mountain to support the equipment reduces the cost of constructing the equipment frame, thereby lowering the overall construction cost.

[0033] At the laterite nickel mine site, as the mining of laterite nickel ore causes the circumference of the mine pit to gradually form a stepped mountain. This application utilizes the stepped mountain on site to set up the washing and beneficiation equipment on the mountain steps, so that the above equipment can be arranged in a stepwise manner from top to bottom. The slurry can be transported between the equipment by relying on the gravity of the slurry itself, which is cost-effective.

[0034] It is easy to understand that the equipment in this application, such as the chain plate feeder 1, the cylindrical washing machine 2, the double spiral scrubbing machine 3, the hydrocyclone 6, the spiral chute 7, the shaking table 8, and the magnetic separator 10, can all be existing conventional equipment.

[0035] In one embodiment, please refer to Figures 1 to 2 The ore washing equipment and the ore beneficiation equipment are arranged sequentially from top to bottom along the stepped mountain.

[0036] When the mountain is high enough and has enough steps, the chain plate feeder 1, the cylindrical washing machine 2, the double spiral scrubbing machine 3, the hydrocyclone 6, the spiral chute 7, the shaking table 8 and the magnetic separator 10 can be arranged in steps from top to bottom along the mountain. The double spiral scrubbing machine 3 is connected to the hydrocyclone 6 through a feed pump.

[0037] In one embodiment, please refer to Figures 3 to 4 The ore washing equipment and the ore beneficiation equipment are arranged alternately on the mountain, and the linear vibrating screen 4 is connected to the hydrocyclone 6 through a feed pump.

[0038] When the mountain is low and its steps are insufficient to allow for a straight arrangement of the above equipment, the chain feeder 1, the cylindrical washing machine 2, and the double spiral scrubbing machine 3 can be arranged in one row, and the hydrocyclone 6, the spiral chute 7, the shaking table 8, and the magnetic separator 10 can be arranged in another row. The two rows of equipment are arranged alternately on the mountain, and the slurry outlet of the double spiral scrubbing machine 3 is connected to the hydrocyclone 6 through a feed pump. With this arrangement, only one feed pump is needed to complete the slurry transportation of the entire production line, which can reduce production costs.

[0039] It is understood that the number of the ore washing equipment and the ore beneficiation equipment is not limited and can be set according to the actual situation.

[0040] In one embodiment, the cylindrical washing machine 2 has a first inlet, a first outlet, and a second outlet. The first outlet is used to discharge large-sized gravel, and the second outlet is used to discharge slurry. The second outlet is connected to the feed end of the twin-spiral scrubbing machine 3.

[0041] In one embodiment, the laterite nickel ore washing line further includes a first conveyor belt connected to the first outlet.

[0042] In this embodiment, the cylindrical washing machine 2 includes a screen cylinder that rotates along its axis. The screen cylinder is open at both ends, with one end being the first inlet and the other end forming the first outlet. The screen holes around the circumference of the screen cylinder form the second outlet. The chain plate feeder 1 is connected to the first inlet. In actual use, a dump truck pours the ore into the feeding channel, which is connected to the feeding end of the chain plate feeder 1. The chain plate feeder 1 conveys the ore into the screen cylinder of the cylindrical washing machine 2. Water is then sprayed into the screen cylinder to wash the ore. Larger gravel cannot pass through the screen holes of the screen cylinder and is conveyed away from the first outlet via the first conveyor belt. Smaller particles of ore mix with water to form a slurry, which then enters the double spiral scrubbing machine 3 through the second outlet.

[0043] In one embodiment, the twin-spiral scrubbing machine 3 has a second inlet, a third outlet, and a fourth outlet. The second inlet is connected to the cylindrical washing machine 2, the third outlet is used to discharge small-sized gravel, and the fourth outlet is used to discharge slurry. The fourth outlet is connected to the hydrocyclone 6 via a feed pump.

[0044] It should be noted that the terms "large gravel" and "small gravel" in this embodiment are only relative concepts and do not limit their size. In principle, the size of the large gravel should be larger than that of the small gravel. In practical applications, the above-mentioned purpose of this embodiment can be achieved by setting the screen diameter of the cylindrical washing machine 2 to a set value, such as 2cm.

[0045] In one embodiment, the ore washing equipment further includes a linear vibrating screen 4 located downstream of the twin-spiral scrubbing machine 3, the third outlet being connected to the feed end of the linear vibrating screen 4, and the slurry outlet of the linear vibrating screen 4 being connected to the hydrocyclone 6 via a feed pump.

[0046] In this embodiment, after the material enters the double spiral scrubber 3 for cleaning, the resulting slurry meets the requirements for subsequent mineral processing and can be transported to the hydrocyclone 6 via the feed pump through the fourth outlet. Small-sized gravel is discharged through the third outlet. Since a small amount of slurry is still attached to the surface of the small-sized gravel, a linear vibrating screen 4 is also provided downstream of the double spiral scrubber 3 to avoid waste. The third outlet is connected to the feed end of the linear vibrating screen 4 to transport the small-sized gravel to the linear vibrating screen 4 for further cleaning and sorting. It can be understood that the linear vibrating screen 4 also has two outlets, one for discharging slurry as a slurry outlet and the other for discharging small-sized gravel as a gravel outlet. The slurry outlet of the linear vibrating screen 4 is connected to the hydrocyclone 6 via the feed pump, thereby transporting the slurry attached to the gravel surface to the hydrocyclone 6 for further refining. This arrangement avoids waste.

[0047] In one embodiment, the ore washing equipment further includes a mixing tank 5, the feed end of which is connected to the fourth outlet and the slurry outlet of the linear vibrating screen 4, and the discharge end of the mixing tank 5 is connected to the hydrocyclone 6 via a feed pump.

[0048] In this embodiment, the cylindrical washing machine 2, the double spiral scrubbing machine 3, and the linear vibrating screen 4 produce a large number of fine particles in the slurry obtained from the water washing of laterite nickel ore. To prevent these particles from settling at the bottom of the equipment and preventing them from being transported to the beneficiation equipment, a mixing tank 5 is also provided. The feed end of the mixing tank 5 is connected to the fourth outlet and the slurry outlet of the linear vibrating screen 4. The discharge end of the mixing tank 5 is connected to the hydrocyclone 6 via a feed pump. The slurry after passing through the double spiral scrubbing machine 3 and the linear vibrating screen 4 enters the mixing tank 5. The mixing paddle in the mixing tank 5 continuously stirs the slurry, effectively preventing particle deposition. Since the processing efficiency of the washing equipment is not the same as that of the beneficiation equipment, the mixing tank 5 can also serve as a temporary storage unit. The mixing tank 5 can control the flow rate of the slurry transported to the beneficiation equipment, ensuring that the slurry is transported to the beneficiation equipment at a reasonable rate.

[0049] In actual production, each piece of equipment may break down or require maintenance, affecting the processing efficiency of the entire production line. By setting up the mixing tank 5 to temporarily store the slurry, even when some equipment breaks down or requires maintenance, the mixing tank 5 can still hold or transport the slurry, ensuring the continuous operation of the entire production line and preventing a single piece of equipment from affecting the entire line. Furthermore, in actual production, multiple washing and beneficiation equipment are often installed. In this case, the mixing tank 5 can act as a transitional link, meaning that slurry from all washing equipment is transported to the mixing tank 5, which then rationally distributes the slurry to each beneficiation unit, thus helping to improve the overall processing efficiency of the production line.

[0050] It should be noted that in this application, "inlet" and "outlet" should be interpreted broadly. For example, the second outlet of the cylindrical washing machine 2 refers to the screen holes of the cylindrical washing machine 2. Furthermore, in this application, the term "connected" should also be interpreted broadly. For example, the connection between the second inlet of the double spiral scrubbing machine 3 and the second outlet of the cylindrical washing machine 2 can mean that the second inlet of the double spiral scrubbing machine 3 and the second outlet of the cylindrical washing machine 2 are connected through a pipe, or it can mean that the second inlet of the double spiral scrubbing machine 3 is located below the second outlet of the cylindrical washing machine 2, and the ore discharged from the second outlet of the cylindrical washing machine 2 can flow directly into the second inlet of the double spiral scrubbing machine 3. Both of these interpretations indicate that the inlet of the double spiral scrubbing machine 3 is connected to the second outlet of the cylindrical washing machine 2, and are not limited to a physical pipe connection.

[0051] In one embodiment, multiple shaking tables 8 are provided, and the multiple shaking tables 8 are arranged sequentially from top to bottom along the mountain.

[0052] In this embodiment, the multiple shaking tables 8 are respectively a first-stage shaking table and a second-stage shaking table. The first-stage shaking table and the second-stage shaking table are arranged sequentially along the slurry flow direction. This arrangement can further separate the slurry so that the particle size of the slurry meets the standards of subsequent processes.

[0053] In this embodiment, the chain plate feeder 1 is arranged near the top of the mountain and connected to the feeding channel on the mountain. The chain plate feeder 1 is connected to the first inlet to convey ore to the cylindrical washing machine 2. The feeding channel can be used by transport vehicles to directly dump laterite nickel ore into it.

[0054] It should be noted that the above-mentioned equipment is all existing technology, and its specific structure and working principle will not be described in detail here.

[0055] In this embodiment, a concentrate pump tank 9 is also provided between the shaking table 8 and the magnetic separator 10.

[0056] To better understand this application, the following is combined with... Figures 1 to 4 The technical solution of this application is described in detail below:

[0057] The chain feeder 1, the cylindrical washing machine 2, the double spiral scrubbing machine 3, the linear vibrating screen 4, the mixing tank 5, the hydrocyclone 6, the spiral chute 7, the shaking table 8, the concentrate pump tank 9, and the magnetic separator 10 are connected in sequence. Specifically, the chain feeder 1 is connected to the first inlet, the first outlet is connected to the first conveyor belt, the second outlet is connected to the second inlet, the third outlet is connected to the feed end of the linear vibrating screen 4, and the fourth outlet is connected to the feed end of the mixing tank 5. The gravel outlet of screen 4 is connected to the second conveyor belt, and the slurry outlet of the linear vibrating screen 4 is connected to the feed end of the mixing tank 5. The discharge end of the mixing tank 5 is connected to the hydrocyclone 6 via a feed pump. In actual use, a dump truck pours the ore into the feed channel, which is connected to the feed end of the chain feeder 1. The chain feeder 1 transports the ore from the first inlet to the cylindrical washing machine 2. The cylindrical washing machine 2 cleans and pre-screens the ore, wherein large-sized gravel is discharged from the first outlet and passes through the first... The conveyor belt carries away the slurry, while the slurry is transported from the second outlet to the double spiral scrubber 3. The double spiral scrubber 3 performs secondary washing and screening of the slurry. Small-sized gravel is transported from the third outlet to the linear vibrating screen 4 for further washing and screening. The slurry discharged from the fourth outlet is directly transported to the mixing tank 5. The small gravel washed by the linear vibrating screen 4 is transported away by the second conveyor belt, while the slurry is also transported to the mixing tank 5. The mixing tank 5 agitates the slurry to prevent particle sedimentation and sequentially transports the slurry... The slurry is fed into the hydrocyclone 6, spiral chute 7, first-stage shaking table, second-stage shaking table, and magnetic separator 10 for separation, finally obtaining a slurry that meets the requirements of subsequent processing steps. This application relies on the existing stepped mountains around the mine for construction, allowing the slurry between the equipment to flow naturally from the upper equipment to the lower equipment under the action of gravity, avoiding the need for an additional power source for slurry transportation, reducing the energy consumption of slurry driving, and thus reducing the operating cost of mineral processing. At the same time, the stepped mountains support the above-mentioned equipment, reducing the construction cost of the equipment frame, thereby reducing the overall construction cost.

[0058] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. A laterite nickel ore stratified washing line, characterized in that, This includes ore washing and beneficiation equipment arranged in a stepped manner along the terraced mountainside; The ore washing equipment includes a chain plate feeder, a cylindrical ore washing machine, and a double spiral scrubbing machine connected sequentially from top to bottom along the stepped mountain. The mineral processing equipment includes a hydrocyclone, a spiral chute, a shaking table, and a magnetic separator connected sequentially from top to bottom along the stepped mountain. The slurry outlet of the twin-spiral scrubbing machine is connected to the hydrocyclone.

2. The laterite nickel ore layer washing line according to claim 1, characterized in that, The ore washing equipment and the ore beneficiation equipment are arranged sequentially from top to bottom along the stepped mountain.

3. The laterite nickel ore layer washing line according to claim 1, characterized in that, The ore washing equipment and the ore beneficiation equipment are arranged alternately on the mountainside, and the slurry outlet of the double spiral scrubbing machine is connected to the hydrocyclone through a feed pump.

4. The laterite nickel ore layer washing line according to claim 1, characterized in that, The cylindrical washing machine has a first inlet, a first outlet, and a second outlet. The first outlet is used to discharge large-sized gravel, and the second outlet is used to discharge slurry. The second outlet is connected to the feed end of the twin-spiral scrubbing machine.

5. The laterite nickel ore layer washing line according to claim 4, characterized in that, The laterite nickel ore washing line also includes a first conveyor belt, which is connected to the first outlet.

6. The laterite nickel ore layer washing line according to claim 1, characterized in that, The twin-spiral scrubbing machine has a second inlet, a third outlet, and a fourth outlet. The second inlet is connected to the cylindrical washing machine. The third outlet is used to discharge small-sized gravel, and the fourth outlet is used to discharge slurry. The fourth outlet is connected to the hydrocyclone via a feed pump.

7. The laterite nickel ore layer washing line according to claim 6, characterized in that, The ore washing equipment also includes a linear vibrating screen located downstream of the twin-spiral scrubbing machine. The third outlet is connected to the feed end of the linear vibrating screen, and the slurry outlet of the linear vibrating screen is connected to the hydrocyclone via a feed pump.

8. The laterite nickel ore layer washing line according to claim 7, characterized in that, The ore washing equipment also includes a mixing tank, the feed end of which is connected to the fourth outlet and the slurry outlet of the linear vibrating screen, and the discharge end of which is connected to the hydrocyclone via a feed pump.

9. The laterite nickel ore layer washing line according to claim 7, characterized in that, The laterite nickel ore washing line also includes a second conveyor belt, which is connected to the gravel outlet of the linear vibrating screen.

10. The laterite nickel ore layer washing line according to claim 1, characterized in that, The shaking table is provided in multiple units, and the multiple shaking tables are arranged sequentially from top to bottom along the mountain.

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