Laterite nickel ore beneficiation device and process

Abstract

The present invention relates to a laterite nickel ore beneficiation device and process, the device comprises: a cylindrical ore washer, a trough ore washer, a vibrating screen, a hydrocyclone connected to the trough ore washer and the vibrating screen, a first thickener connected to the hydrocyclone, a spiral chute connected to the hydrocyclone, a first ball mill connected to the spiral chute, and a second thickener connected to the first ball mill, connected in sequence; the process comprises: sequentially performing three-stage sorting and re-selection on a ore material; performing settling on the ore material that meets the requirements after the three-stage sorting and re-selection; and performing crushing, grinding, and settling on the ore material that meets the requirements. The present invention makes full use of the ore, reduces the waste of the ore, and improves the collection rate of nickel.

Description

A laterite nickel ore dressing equipment and process Technical Field

[0001] The present invention relates to the technical field of nickel ore processing, and in particular to laterite nickel ore beneficiation equipment and a process. Background Art

[0002] Nickel is an important strategic nonferrous metal with excellent ductility, toughness, corrosion resistance, and plasticity. It can be highly polished and is widely used in a wide range of applications, including stainless steel, battery materials, electroplating, pigments, ceramics, catalysts, and magnetically sensitive materials. Currently, the growing demand for stainless steel in emerging economies, represented by China, India, and Brazil, and the large-scale use of nickel-rich cathode materials in ternary lithium-ion power batteries, are driving strong global nickel market demand. Nickel has an average abundance of 0.008% in the Earth's crust, ranking 24th. While nickel ore resources are common globally, their natural concentration is far lower than that of elements like iron and aluminum. Therefore, artificial enrichment of nickel is crucial for its development and utilization. Currently, there are two main types of ore resources suitable for nickel extraction: nickel sulfide ores and laterite nickel ores. Nickel sulfide ores account for approximately 28% of nickel resources, while laterite nickel ores account for approximately 55%. Nickel sulfide has excellent hydrophobicity, making flotation a powerful method for effectively enriching it and reducing smelting costs. Nickel sulfide ore resources provide approximately 59% of the world's nickel and nickel chemicals, making it the primary source of nickel. Unfortunately, the declining reserves of large-scale nickel sulfide mines and the increasing depths of mining have made mining increasingly difficult and expensive. With nickel sulfide ore facing depletion, researchers are turning their attention to laterite nickel ore, which offers abundant nickel reserves.

[0003] Laterite nickel ore is a loose, clay-like 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 geological processes such as weathering, leaching, dissemination, and alteration. The iron element is severely oxidized to a +3 valence state, resulting in an overall reddish-brown appearance, hence the name laterite nickel ore. Unlike nickel sulfide ore, laterite nickel ore is a difficult-to-separate oxide ore, making it difficult to effectively enrich nickel through mineral processing methods. Prior art, such as patent CN200910079266.9, provides a laterite ore washing system comprising: a drum washer with an ore feed inlet, a slurry outlet, and a waste rock outlet; and a trough scrubber with a slurry inlet, a slurry overflow outlet, and a return sand outlet. The trough scrubber is located downstream of the drum washer along the washing process flow, with its slurry inlet connected to the drum washer's slurry outlet.

[0004] However, there are the following problems: the mineral processing adopts a step-by-step screening method, which often loses a large part of the nickel and wastes part of the ore, resulting in a low nickel collection rate.

[0005] Summary of the Invention

[0006] In view of this, the present invention provides a laterite nickel ore dressing device and process, which reduces ore waste and improves the nickel collection rate.

[0007] In order to achieve the above-mentioned object, the technical solution of the present invention is to provide a laterite nickel ore beneficiation equipment, comprising: a cylindrical ore washer, wherein the cylindrical ore washer has an ore inlet, a first ore outlet for discharging larger-sized ore, and a second ore outlet for discharging smaller-sized ore;

[0008] A trough-type ore washer, the trough-type ore washer having a washing material inlet, a first washing material outlet for discharging larger-sized washing materials, and a second washing material outlet for discharging smaller-sized washing materials, the washing material inlet being connected to the second ore outlet;

[0009] a vibrating screen having a screening material inlet, a first screening material outlet for discharging larger-sized screening materials, and a second screening material outlet for discharging smaller-sized screening materials, wherein the screening material inlet is connected to the first washing material outlet;

[0010] A hydrocyclone having a cyclone material inlet, a first cyclone material outlet for discharging larger-sized cyclone material, and a second cyclone material outlet for discharging smaller-sized cyclone material, wherein the cyclone material inlet is connected to the second screening material outlet and the second washing material outlet;

[0011] a first thickener, wherein the feed port of the first thickener is connected to the second cyclone material outlet, and the discharge port of the first thickener outputs the slurry to be acid leached;

[0012] a spiral chute having a heavy material separation inlet, a first heavy material separation outlet for discharging heavier materials, and a second heavy material separation outlet for discharging lighter materials, wherein the heavy material separation inlet is connected to the first cyclone material outlet;

[0013] a first ball mill, wherein the feed inlet of the first ball mill is connected to the second heavy material selection outlet;

[0014] A second thickener, wherein the feed port of the second thickener is connected to the discharge port of the ball mill, and the discharge port of the second thickener outputs the slurry to be acid leached.

[0015] Furthermore, it includes a magnetic separation mechanism, which has a feed end, a first discharge end for discharging non-magnetic ore pulp and a second discharge end for magnetic ore pulp, and the feed end is connected to the first heavy separation outlet.

[0016] Furthermore, it also includes a crusher, a second ball mill, and a third thickener. The crusher has a crushed material inlet and a crushed material outlet, the crushed material inlet is connected to the first mineral material outlet and the first screening material outlet, the feed port of the second ball mill is connected to the crushed material outlet of the crusher, the feed port of the third thickener is connected to the discharge port of the second ball mill, and the discharge port of the third thickener outputs the ore pulp to be neutralized.

[0017] Furthermore, the first mineral material outlet is used to discharge mineral materials with a particle size greater than 350 mm, and the second mineral material outlet is used to discharge mineral materials with a particle size not greater than 350 mm.

[0018] Furthermore, the first washing material outlet is used to discharge mineral materials with a particle size of 1.5-350 mm, and the second washing material outlet is used to discharge mineral materials with a particle size not greater than 1.5 mm.

[0019] Furthermore, the first screening material outlet is used to discharge mineral materials with a particle size of 1.5-350 mm, and the second screening material outlet is used to discharge mineral materials with a particle size not greater than 1.5 mm.

[0020] Furthermore, the first cyclone material outlet is used to discharge mineral materials with a particle size of 53 μm-1.5 mm, and the second cyclone material outlet is used to discharge mineral materials with a particle size not greater than 53 μm.

[0021] Furthermore, the particle size of the products of the first ball mill and the second ball mill is not greater than 72 μm.

[0022] Furthermore, the particle size of the products of the first ball mill and the second ball mill is not greater than 53 μm.

[0023] A laterite nickel ore beneficiation process of the present invention, based on any of the above-mentioned laterite nickel ore beneficiation equipment, comprises the following steps:

[0024] The drum ore washer performs primary sorting of the ore according to the first particle size requirement;

[0025] The trough-type ore washer performs secondary sorting of the ore that meets the first particle size requirement according to the second particle size requirement;

[0026] The vibrating screen performs supplementary sorting on the secondary sorted ore according to the second particle size requirement;

[0027] The hydrocyclone performs three-stage separation of the ore materials that meet the second particle size requirement according to the third particle size requirement;

[0028] The first thickener settles the ore that meets the third particle size requirement and outputs the ore pulp to be acid leached;

[0029] The spiral chute reselects the ore that does not meet the third particle size requirement;

[0030] The first ball mill is used to ball mill the lighter ore in the gravity separation;

[0031] The second thickener settles the ball-milled ore and outputs the ore slurry to be acid-leached.

[0032] Furthermore, the method further comprises the following steps: crushing and pelletizing the ore materials that do not meet the first particle size requirement;

[0033] After grinding and sedimentation, the ore pulp to be neutralized is outputted, which meets the fourth particle size requirement.

[0034] Furthermore, the first particle size is required to be no greater than 350 mm.

[0035] Furthermore, the second particle size is required to be no greater than 1.5 mm.

[0036] Furthermore, the third particle size is required to be no greater than 53 μm.

[0037] Furthermore, the fourth particle size requirement is no greater than 72 μm.

[0038] Compared with the prior art, the laterite nickel ore dressing equipment provided by the present invention has the following beneficial effects:

[0039] Compared with the prior art, the present invention is equipped with a spiral chute, a first ball mill and a second thickener, and the larger cyclone material discharged from the hydrocyclone is subjected to gravity separation, crushing and thickening treatment in sequence, so that the material discarded in the prior art can be used as raw material slurry after treatment, reducing ore waste and improving the nickel collection rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic diagram of a laterite nickel ore beneficiation equipment provided by the present invention;

[0041] In the figure: 1-cylinder ore washer, 101-ore inlet, 102-first ore outlet, 103-second ore outlet, 2-trough ore washer, 201-washing material inlet, 202-first washing material outlet, 203-second washing material outlet, 3-vibrating screen, 301-screening material inlet, 302-first screening material outlet, 303-second screening material outlet, 4-hydrocyclone, 401-cyclone material inlet, 402-first cyclone material outlet, 403-second cyclone material outlet, 5-first thickener, 6-spiral chute, 601-gravity separation material inlet, 602-first gravity separation material outlet, 603-second gravity separation material outlet, 7-first ball mill, 8-second thickener, 9-acid leaching mechanism, 10-neutralization mechanism, 11-magnetic separation mechanism, 12-crusher, 13-second ball mill, 14-third thickener. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] Please refer to Figure 1. A laterite nickel ore beneficiation equipment provided by the present invention includes: a drum ore washer 1, the drum ore washer 1 having an ore inlet 101, a first ore outlet 102 for discharging larger-sized ore, and a second ore outlet 103 for discharging smaller-sized ore; a trough ore washer 2, the trough ore washer 2 having a washing material inlet 201, a first washing material outlet 202 for discharging larger-sized washed material, and a second washing material outlet 203 for discharging smaller-sized washed material, the washing material inlet 201 being connected to the second ore outlet 103; a vibrating screen 3, the vibrating screen 3 having a screening material inlet 301, a first screening material outlet 302 for discharging larger-sized screen material, and a second screening material outlet 303 for discharging smaller-sized screen material, the screening material inlet 301 being connected to the first screening material outlet 202; a hydrocyclone 4, the hydrocyclone 4 having a cyclone material inlet 401, a cyclone material outlet 402 for discharging larger-sized cyclone material, and a second cyclone material outlet 403 for discharging smaller-sized screen material. a first cyclone material outlet 402 for discharging cyclone material of smaller size and a second cyclone material outlet 403 for discharging cyclone material of smaller size, the cyclone material inlet 401 being connected to the second screening material outlet 303 and the second washing material outlet 203; a first thickener 5, the feed port of the first thickener 5 being connected to the second cyclone material outlet 403; a spiral chute 6, the spiral chute 6 having a gravity separation inlet 601, a first gravity separation outlet 602 for discharging heavier materials, and a second gravity separation outlet 603 for discharging lighter materials, the gravity separation inlet 601 being connected to the first cyclone material outlet 402; a first ball mill 7, the feed port of the first ball mill 7 being connected to the second gravity separation outlet 603; a second thickener 8, the feed port of the second thickener 8 being connected to the discharge port of the first ball mill 7; and an acid leaching mechanism 9, the feed port of the acid leaching mechanism 9 being connected to the discharge ports of the first thickener 5 and the second thickener 8.

[0044] Compared with the prior art, the present invention is equipped with a spiral chute 6, a first ball mill 7 and a second thickener 8, and the larger cyclone material discharged from the hydrocyclone 4 is subjected to gravity separation, crushing and thickening treatment in sequence, so that the material discarded in the prior art can be used as raw material slurry after treatment, reducing ore waste and improving the nickel recovery rate.

[0045] It should be noted that, in the present invention, “inlet” and “outlet” should be understood in a broad sense. For example, the second ore outlet 103 of the drum ore washer 1 refers to the mesh of the drum ore washer 1 . In addition, in the present invention, the term "connected" should also be understood in a broad sense. For example, the washing inlet 201 of the trough type ore washer 2 is connected to the second mineral outlet 103 of the drum ore washer 1. The washing inlet 201 of the trough type ore washer 2 and the second mineral outlet 103 of the drum ore washer 1 can be connected through a pipeline, or the washing inlet 201 of the trough type ore washer 2 is located below the second mineral outlet 103 of the drum ore washer 1, and the mineral material discharged from the second mineral outlet 103 of the drum ore washer 1 can flow directly into the washing inlet 201 of the trough type ore washer 2. This indicates that the washing inlet 201 of the trough type ore washer 2 is connected to the second mineral outlet 103 of the drum ore washer 1, and is not limited to being connected through an actual pipeline.

[0046] Specifically, the particle size of the ore separated by the drum ore washer 1 is generally about 50 mm or more. The minimum particle size of the separated ore can be changed by changing the mesh size of the drum ore washer 1. Typically, the maximum particle size of the laterite ore entering the drum ore washer 1 is 500 mm. Therefore, the particle size of the ore separated by the drum ore washer 1 is approximately between 50 and 500 mm. In this embodiment, the first ore outlet 102 of the drum ore washer 1 is used to discharge ore with a particle size greater than 350 mm, and the second ore outlet 103 is used to discharge ore with a particle size not greater than 350 mm.

[0047] Specifically, the mineral material with a particle size not greater than 350 mm then enters the trough type ore washer 2 for washing. Generally, the particle size of the laterite ore in the slurry after washing by the trough type ore washer 2 is less than 2 mm. In this embodiment, the first washing outlet 202 of the trough type ore washer 2 is used to discharge mineral material with a particle size of 1.5-350 mm, and the second washing outlet 203 is used to discharge mineral material with a particle size not greater than 1.5 mm.

[0048] Specifically, the mineral material with a particle size not greater than 1.5 mm enters the vibrating screen 3 for screening. In this embodiment, the function of the vibrating screen 3 is to perform secondary screening on the mineral material with a particle size not greater than 1.5 mm. The first screening material outlet 302 is used to discharge the mineral material with a particle size of 1.5-350 mm, and the second screening material outlet 303 is used to discharge the mineral material with a particle size not greater than 1.5 mm.

[0049] Specifically, ore with a particle size of 1.5 mm or less enters the hydrocyclone 4, a classifying device that uses centrifugal force to accelerate the settling velocity of slurry particles and separates them based on size, shape, and specific gravity. In this embodiment, the first hydrocyclone outlet 402 is used to discharge ore with a particle size of 53 μm to 1.5 mm, and the second hydrocyclone outlet 403 is used to discharge ore with a particle size of 53 μm or less.

[0050] Specifically, ore with a particle size of no greater than 53 μm is fed into the first thickener 5 for sedimentation. The first thickener 5 is a solid-liquid separation mechanism based on gravity sedimentation. With the help of a slowly rotating rake installed in the first thickener 5, the thickened underflow slurry is discharged from the discharge port at the bottom of the first thickener 5.

[0051] Specifically, ore with a particle size between 53 μm and 1.5 mm is fed into the spiral chute 6, which gravity-separates the ore, separating heavier and lighter materials. Heavier materials include magnetite and chromite. Chromite, with its greater hardness, can cause wear and tear on subsequent equipment at high flow rates, reducing its service life.

[0052] Specifically, the lighter ore is fed into the first ball mill 7, which crushes and grinds the ore to produce ore of smaller particle size. In this embodiment, the particle size of the product produced by the first ball mill 7 is no greater than 72 μm. In a more preferred embodiment, the particle size of the product produced by the first ball mill 7 is 53 μm.

[0053] Specifically, the ore crushed by the first ball mill 7 is sent to the second thickener 8 for sedimentation treatment. The second thickener 8 is a solid-liquid separation mechanism based on gravity sedimentation. With the help of a slowly running rake installed in the second thickener 8, the thickened underflow slurry is discharged from the discharge port at the bottom of the second thickener 8.

[0054] Specifically, the slurry settled by the first thickener 5 and the slurry settled by the second thickener 8 are fed into the acid leaching mechanism 9 for acid leaching. The inner surface of the acid leaching mechanism 9 has a titanium-infiltrated layer, which can resist corrosion and extend service life.

[0055] Furthermore, the ore body 10 is connected to the acid leaching mechanism 9, and the ore body after acid leaching is sent to the neutralization mechanism 10 for neutralization. The neutralizing agent is generally lime.

[0056] Furthermore, a magnetic separation mechanism 11 is included. The magnetic separation mechanism 11 has a feed end, a first discharge end for discharging non-magnetic ore pulp, and a second discharge end for magnetic ore pulp. The feed end is connected to the first heavy separation outlet 602. The purpose of providing the magnetic separation mechanism is to separate heavier ore into non-magnetic chromite ore and magnetic magnetite ore.

[0057] Furthermore, the device further includes a crusher 12, a second ball mill 13, and a third thickener 14. The crusher 12 has a crushed material inlet and a crushed material outlet, the crushed material inlet being connected to the first ore outlet 102 and the first screening outlet 302. The feed inlet of the second ball mill 13 is connected to the crushed material outlet of the crusher 12. The feed inlet of the third thickener 14 is connected to the discharge outlet of the second ball mill 13, and the discharge outlet of the third thickener 14 is connected to the neutralization mechanism 10. The product after processing by the crusher 12, the second ball mill 13, and the third thickener 14 has a low nickel content and is not used as raw ore pulp for acid leaching. Instead, it is added to the neutralization mechanism after acid leaching as a neutralizing agent to replace a portion of the lime. This reduces the amount of calcium added and also contains a small amount of nickel, further improving the nickel recovery rate.

[0058] The crusher 12 is used to crush the ore to obtain ore with smaller particle size. In this embodiment, the particle size of the product of the crusher 12 is no more than 2 mm.

[0059] The second ball mill 13 is used to crush and grind the ore to obtain ore with smaller particle size. In this embodiment, the particle size of the product produced by the second ball mill 13 is no greater than 72 μm. In a more preferred embodiment, the particle size of the product produced by the second ball mill 13 is 53 μm.

[0060] The third thickener 14 is a solid-liquid separation mechanism based on gravity sedimentation. With the help of a slow-running rake installed in the third thickener 14, the thickened underflow slurry is discharged from the discharge port at the bottom of the third thickener 14.

[0061] During use, the raw ore is fed into the drum ore washer 1 for washing and separation to produce product 1 (particle size greater than 350mm) and product 2 (particle size less than 350mm). Product 2 enters the trough ore washer 2 for separation to produce product 3 (particle size less than 1.5mm) and product 4 (particle size greater than 1.5mm and less than 350mm). Product 4 enters the vibrating screen 3 to produce product 5 (particle size less than 1.5mm) and product 6 (particle size greater than 1.5mm and less than 350mm). Product 5 and product 3 are combined to produce product 7, which enters the hydrocyclone 4 to produce product 8 (particle size less than 53μm) and product 9 (particle size 53μm to 1.5mm). Product 8 enters the first thickener 5 for thickening to produce product 10. Product 9 enters the spiral chute 6 for gravity separation, producing a lighter product 11 and a heavier product 12. Product 11 enters the first ball mill 7 for ball milling to produce product 13 (particle size no greater than 72 μm). Product 12 is sent to the magnetic separation mechanism 11 for screening and separation to obtain magnetic magnetite and non-magnetic chromite. Product 13 is sent to the second thickener 8 for thickening to produce product 14. Product 14 and product 10 together serve as the slurry for subsequent acid leaching and are sent to the acid leaching mechanism 9 for acid leaching. After acid leaching, the slurry is sent to the neutralization mechanism 10 for neutralization. Product 1 and product 6, as large ore, enter the crusher 12, the second ball mill 13, and the third thickener 14 in sequence to produce product 15 (particle size no greater than 72 μm). Product 15 has a low nickel content and is not used as the raw slurry for acid leaching. Instead, it is used as a neutralizing agent to replace some lime in the pre-neutralization step after acid leaching. This not only reduces the amount of calcium added, but also contains a small amount of nickel, further improving the nickel recovery rate.

[0062] The present invention also provides a laterite nickel ore beneficiation process, based on the above-mentioned laterite nickel ore beneficiation equipment, comprising the following steps:

[0063] The drum ore washer performs primary sorting of the ore according to the first particle size requirement;

[0064] The trough-type ore washer performs secondary sorting of the ore that meets the first particle size requirement according to the second particle size requirement;

[0065] The vibrating screen performs supplementary sorting on the secondary sorted ore according to the second particle size requirement;

[0066] The hydrocyclone performs three-stage separation of the ore materials that meet the second particle size requirement according to the third particle size requirement;

[0067] The first thickener settles the ore that meets the third particle size requirement and outputs the ore pulp to be acid leached;

[0068] The spiral chute reselects the ore that does not meet the third particle size requirement;

[0069] The first ball mill is used to ball mill the lighter ore in the gravity separation;

[0070] The second thickener settles the ball-milled ore and outputs the ore slurry to be acid-leached.

[0071] Furthermore, the method further includes the following steps: crushing, ball milling and sedimentation of the ore materials that do not meet the first particle size requirement, and outputting the ore pulp to be neutralized that meets the fourth particle size requirement.

[0072] Furthermore, the first particle size is required to be no greater than 350 mm.

[0073] Furthermore, the second particle size is required to be no greater than 1.5 mm.

[0074] Furthermore, the third particle size is required to be no greater than 53 μm.

[0075] Furthermore, the fourth particle size requirement is no greater than 72 μm.

[0076] Compared with the prior art, the present invention has the following advantages:

[0077] Compared with the prior art, the present invention is equipped with a spiral chute, a first ball mill and a second thickener, and the larger cyclone material discharged from the hydrocyclone is subjected to gravity separation, crushing and thickening treatment in sequence, so that the material discarded in the prior art can be used as raw material slurry after treatment, reducing ore waste and improving the nickel collection rate.

[0078] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laterite nickel ore dressing equipment, characterized in that: include: a drum ore washer having an ore inlet, a first ore outlet for discharging larger sized ore, and a second ore outlet for discharging smaller sized ore; A trough type ore washer, the trough type ore washer having a material washing inlet, a first material washing outlet for discharging larger-sized material washing, and a second material washing outlet for discharging smaller-sized material washing, the material washing inlet being connected to the second material washing outlet; A vibrating screen, the vibrating screen having a screening material inlet, a first screening material outlet for discharging screening materials of larger sizes, and a second screening material outlet for discharging screening materials of smaller sizes, the screening material inlet being connected to the first washing material outlet; A hydrocyclone, wherein the hydrocyclone has a cyclone material inlet, a first cyclone material outlet for discharging cyclone materials of larger size, and a second cyclone material outlet for discharging cyclone materials of smaller size, wherein the cyclone material inlet is connected to the second screening material outlet and the second washing material outlet; a first thickener, wherein the feed port of the first thickener is connected to the second cyclone material outlet, and the discharge port of the first thickener outputs the slurry to be acid leached; A spiral chute, the spiral chute having a heavy material selection inlet, a first heavy material selection outlet for discharging heavier materials, and a second heavy material selection outlet for discharging lighter materials, the heavy material selection inlet being connected to the first cyclone material outlet; a first ball mill, wherein a feed inlet of the first ball mill is connected to the second reselection material outlet; A second thickener, wherein the feed port of the second thickener is connected to the discharge port of the ball mill, and the discharge port of the second thickener outputs the ore pulp to be acid leached.

2. The laterite nickel ore dressing equipment according to claim 1, characterized in that: It also includes a magnetic separation mechanism, which has a feed end, a first discharge end for discharging non-magnetic ore pulp and a second discharge end for magnetic ore pulp, and the feed end is connected to the first heavy separation material outlet.

3. The laterite nickel ore dressing equipment according to claim 2, characterized in that: It also includes a crusher, a second ball mill, and a third thickener. The crusher has a crushed material inlet and a crushed material outlet, the crushed material inlet is connected to the first mineral material outlet and the first screening material outlet, the feed inlet of the second ball mill is connected to the crushed material outlet of the crusher, the feed inlet of the third thickener is connected to the discharge port of the second ball mill, and the discharge port of the third thickener outputs the slurry to be neutralized.

4. The laterite nickel ore dressing equipment according to claim 1, characterized in that: The first mineral material outlet is used to discharge mineral materials with a particle size greater than 350 mm, and the second mineral material outlet is used to discharge mineral materials with a particle size not greater than 350 mm.

5. The laterite nickel ore dressing equipment according to claim 1, characterized in that: The first material washing outlet is used to discharge mineral materials with a particle size of 1.5-350 mm, and the second material washing outlet is used to discharge mineral materials with a particle size not greater than 1.5 mm.

6. The laterite nickel ore dressing equipment according to claim 1, characterized in that: The first screening material outlet is used to discharge mineral materials with a particle size of 1.5-350 mm, and the second screening material outlet is used to discharge mineral materials with a particle size not greater than 1.5 mm.

7. The laterite nickel ore dressing equipment according to claim 1, characterized in that: The first cyclone material outlet is used to discharge mineral material with a particle size of 53 μm-1.5 mm, and the second cyclone material outlet is used to discharge mineral material with a particle size not greater than 53 μm.

8. The laterite nickel ore dressing equipment according to claim 3, characterized in that: The particle size of the products of the first ball mill and the second ball mill is no greater than 72 μm.

9. The laterite nickel ore dressing equipment according to claim 8, characterized in that: The particle size of the products of the first ball mill and the second ball mill is no greater than 53 μm.

10. A laterite nickel ore beneficiation process, based on the laterite nickel ore beneficiation equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: The drum ore washer performs primary sorting of the ore according to the first particle size requirement; The trough ore washer performs secondary sorting of the ore materials that meet the first particle size requirements according to the second particle size requirements; The vibrating screen performs supplementary sorting on the secondary sorted ore materials according to the second particle size requirements; The hydrocyclone performs three-stage sorting of the ore materials meeting the second particle size requirement according to the third particle size requirement; The first thickener settles the ore material that meets the third particle size requirement and outputs the ore pulp to be acid-leached; The spiral chute reselects the ore materials that do not meet the third particle size requirements; The first ball mill is used to ball mill the lighter ore in the gravity separation; The second thickener settles the ball-milled ore and outputs the ore slurry to be acid-leached.

11. The laterite nickel ore dressing process according to claim 10, characterized in that: The following steps are also included: The ore materials that do not meet the first particle size requirement are crushed, ball-milled and settled, and the ore pulp to be neutralized that meets the fourth particle size requirement is output.

12. The laterite nickel ore dressing process according to claim 10, characterized in that: The first particle size requirement is no greater than 350 mm.

13. The laterite nickel ore dressing process according to claim 10, characterized in that: The second particle size requirement is no greater than 1.5 mm.

14. The laterite nickel ore dressing process according to claim 10, characterized in that: The third particle size requirement is not greater than 53 μm.

15. The laterite nickel ore dressing process according to claim 11, characterized in that: The fourth particle size requirement is not greater than 72 μm.

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