Equipment system for preparing new-energy nickel-cobalt-manganese raw material from lateritic nickel ore

Abstract

An equipment system for preparing a new-energy nickel-cobalt-manganese raw material from lateritic nickel ore. The system comprises a raw and auxiliary material supply module (a), a leaching reaction module (b), a neutralization and impurity removal module (c), a nickel-cobalt-manganese mixed hydroxide synthesis module (d), a crystal manufacturing module (f), a ternary precursor manufacturing module (g), a ternary positive electrode material manufacturing module (h), and other modules. The system overcomes defects in the prior art and process defects, as the system not only realizes simultaneous efficient extraction of nickel, cobalt and manganese by means of a green technique and process for simultaneously extracting nickel, cobalt and manganese from low-grade lateritic nickel ore, but also performs safe cyclic disposal of wastewater, waste residues and waste gas by means of an energy-saving and emission-lowering green technique and a clean production process; and the system has energy-saving, carbon-emission-lowering and pollution-reducing effects, maximizes the comprehensive recovery of nickel, cobalt and manganese, effectively resolves the contradiction between supply and demand of scarce strategic nickel-cobalt-manganese resources in the new-energy industry, and is completely in line with global trends of green development and dual-carbon economies.

Description

An equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore Technical Field

[0001] The present invention relates to the fields of metallurgy technology and new energy materials, and in particular to an equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore. Background Art

[0002] With the development of battery and energy storage technologies, the variety of batteries is increasing. Batteries made from various materials are expanding their market reach by leveraging their respective advantages. Among them, ternary lithium batteries are the dominant power lithium battery in the new energy vehicle sector. Due to their high energy density and excellent low-temperature performance, ternary lithium batteries are the power choice for long-range and high-end vehicles, demonstrating promising market prospects.

[0003] As the name suggests, ternary lithium batteries are primarily composed of the three elements nickel, cobalt, and manganese. The upstream supply chain includes nickel, cobalt, and manganese mineral resources, nickel-cobalt-manganese ternary raw materials, and ternary precursors (also known as ternary "cores" or "cores"). The midstream includes ternary cathode materials, separators, electrolytes, and anode materials for ternary lithium batteries. The downstream includes ternary battery cells, battery management systems, and packs. Nickel, cobalt, and manganese minerals and raw materials have become key factors restricting the cost and development of ternary new energy vehicles. Nickel resources and raw materials are particularly crucial for high-capacity ternary batteries. High nickel content equates to high capacity and long battery life. Ultra-high nickel ternary materials containing over 55% nickel can support a range of over 800 kilometers. With the global development of electrification, nickel has become a globally scarce resource.

[0004] Laterite nickel ore, produced in tropical mineralization zones between 22° north and south latitude, contains nickel, cobalt, and manganese. Low-grade laterite nickel ore, particularly those containing less than 1.3% nickel, has a nickel-cobalt-manganese ratio of 10:(0.6-1.5):(1.0-5.0), creating the perfect formula for high-nickel, low-cobalt ternary materials – a gift from nature. However, existing smelting technologies have long focused solely on nickel extraction, or nickel-cobalt extraction, without considering the simultaneous extraction of nickel, cobalt, and manganese, resulting in a significant waste of resources.

[0005] For example, patent CN113564383A discloses a system and process for two-stage pressurized extraction of nickel and cobalt from laterite nickel ore, comprising: a high-pressure acid leaching device for high-temperature and high-pressure acid leaching of limonite-type laterite nickel ore, the high-pressure acid leaching device having a limonite-type laterite nickel ore pulp inlet, a sulfuric acid inlet, and a leached pulp outlet; a high-pressure neutralization unit for high-temperature and high-pressure neutralization of the pulp after high-pressure acid leaching, the high-pressure neutralization unit having a high-pressure acid leaching pulp inlet, a serpentine-type laterite nickel ore pulp outlet, and a high-pressure neutralization unit. The system comprises a nickel ore slurry inlet, a high-pressure neutralized liquid outlet, and a high-pressure neutralization underflow outlet; a neutralization and impurity removal unit for neutralizing and removing impurities from the slurry after high-pressure neutralization, comprising a high-pressure neutralized liquid inlet, a neutralizer inlet, a neutralized and impurity-removed liquid outlet, and a neutralization and impurity-removed underflow outlet; and a nickel-cobalt precipitation unit for precipitating the neutralized and impurity-removed liquid, comprising a neutralized and impurity-removed liquid inlet, a precipitant inlet, a precipitant liquid outlet, and a nickel-cobalt concentrate outlet. The system and the process based on the system produce a nickel-cobalt concentrate.

[0006] The current laterite nickel ore extraction process system has a low degree of modular integration. It can only produce nickel and cobalt raw materials from laterite nickel ore by smelting. It focuses only on extracting nickel and cobalt without recovering manganese. Moreover, the process equipment cannot extract nickel, cobalt and manganese simultaneously, and the resulting product is crude nickel and cobalt hydroxide. It cannot be directly used to prepare ternary precursors and further synthesize ternary cathode materials. It also does not involve environmental protection treatment (wastewater, waste residue and waste gas), steam reuse and the overall design and modular management of automated control equipment.

[0007] Summary of the Invention

[0008] In view of this, it is necessary to provide an equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore to solve the technical problems that the existing equipment has a low degree of integration, uses laterite nickel ore to produce nickel-cobalt mixed hydroxide, cannot continuously produce ternary positive electrode materials; only focuses on extracting nickel and cobalt, and cannot simultaneously extract nickel, cobalt and manganese, resulting in waste of resources and energy.

[0009] In order to achieve the above technical objectives, the technical solution of the present invention provides an equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore, and the equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore includes: a raw material supply module, including a ore blending unit, a ore washing unit, a ore dressing unit, a grinding unit and a thickening unit connected in sequence, and also includes a neutralizer preparation unit, an acid preparation unit and a precipitation promoter preparation unit, the ore blending unit is used to configure ore of the required grade, the ore washing unit is used to clean the ore, the ore dressing unit is used to separate the chromium iron oxide in the ore, the grinding unit is used to grind the ore into the required particle size to obtain a slurry, and the thickening unit is used to concentrate the slurry; a leaching reaction module, including a multi-stage preheating unit, a high pressure / oxygen The high-pressure reactor unit and the multi-stage flash unit, the multi-stage preheating unit is connected to the thickening unit for multi-stage preheating of the slurry, the high-pressure / oxygen pressure reactor unit is also connected to the acid preparation unit for leaching the minerals in the slurry, and the multi-stage flash unit is used to perform multi-stage pressure reduction and temperature reduction on the leachate; the neutralization and impurity removal module includes a circulating leaching slurry neutralization unit, a multi-stage countercurrent washing unit and a multi-stage iron removal, aluminum and chromium removal unit. The circulating leaching slurry neutralization unit is connected to the multi-stage flash unit and the neutralizer preparation unit for neutralizing the leachate of the multi-stage flash unit; the multi-stage countercurrent washing unit is connected to the circulating leaching slurry neutralization unit for washing the neutralized leachate; the multi-stage iron removal, aluminum and chromium removal unit is connected to the multi-stage countercurrent washing unit, the circulating leaching slurry neutralization unit and the neutralizer preparation unit for washing the neutralized leachate; the multi-stage iron removal, aluminum and chromium removal unit is connected to the multi-stage countercurrent washing unit, the circulating leaching slurry neutralization unit and the neutralizer preparation unit for neutralizing the leachate. The unit and the neutralizing agent preparation unit are used to remove impurities from the washed leachate, and the slag phase generated during the impurity removal is passed into the multi-stage countercurrent washing unit and the circulating leaching slurry neutralization unit; the nickel-cobalt-manganese mixed hydroxide synthesis module includes a nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit and a nickel-cobalt-manganese mixed hydroxide finished product packaging unit. The nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit is connected to the multi-stage iron removal, aluminum and chromium removal unit and the neutralizing agent preparation unit to precipitate nickel, cobalt and manganese in the leachate after impurity removal; the nickel-cobalt-manganese mixed hydroxide finished product packaging unit is connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit for packaging the precipitate; the valuable metal recovery module includes manganese, copper, zinc and scandium recovery units, and the manganese, copper, zinc and scandium recovery units are connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit. a multi-stage iron removal aluminum-chromium unit and a nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit for recovering valuable metals such as manganese, copper, zinc, and scandium; a crystal manufacturing module comprising a nickel-cobalt-manganese mixed salt crystal manufacturing unit, a nickel salt crystal manufacturing unit, a cobalt salt crystal manufacturing unit, and a manganese salt crystal manufacturing unit; the nickel-cobalt-manganese mixed salt crystal manufacturing unit is connected to the multi-stage iron removal aluminum-chromium unit and the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit to extract the liquid phase to obtain nickel-cobalt-manganese mixed salt crystals; the nickel salt crystal manufacturing unit, the cobalt salt crystal manufacturing unit, and the manganese salt crystal manufacturing unit are all connected to the multi-stage iron removal aluminum-chromium unit and the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit to extract the liquid phase to obtain nickel salt crystals, cobalt salt crystals, and manganese salt crystals, respectively;The ternary precursor manufacturing module includes a sequentially connected material preparation unit, a controlled precipitation reaction unit, and a ternary precursor post-processing unit. The material preparation unit is connected to the nickel-cobalt-manganese mixed salt crystal manufacturing unit and the nickel salt crystal manufacturing unit, the cobalt salt crystal manufacturing unit, and the manganese salt crystal manufacturing unit, and is used to prepare a metal salt solution, an alkaline solution, and a complexing agent. The controlled precipitation reaction unit is used to react the metal salt solution, the alkaline solution, and the complexing agent. The ternary precursor post-processing unit is used to process the reacted materials to obtain a ternary precursor product. The ternary cathode material preparation module includes a sequentially connected lithiation mixing and loading unit, a high-temperature synthesis unit, and a ternary cathode material post-processing unit. The lithiation mixing and loading unit is connected to the ternary precursor post-processing unit and is used to mix the ternary precursor product with a lithium source. The high-temperature synthesis unit is used to perform high-temperature synthesis on the mixed material. The ternary cathode material post-processing unit is used to crush the high-temperature synthesized material and remove magnetic foreign matter.

[0010] Furthermore, the multi-stage preheating unit includes a first preheater, a second preheater, and a third preheater connected in sequence, the first preheater is connected to the thickening unit, and the third preheater is connected to the high-pressure / oxygen pressure reactor unit. The first preheater, the second preheater, and the third preheater are used to preheat the slurry output from the thickening unit step by step.

[0011] Furthermore, the multi-stage flash evaporator includes a first flash evaporator, a second flash evaporator and a third flash evaporator. The first flash evaporator is connected to the high-pressure / oxygen pressure reactor unit, and the third flash evaporator is connected to the circulating leaching slurry neutralization unit. The first flash evaporator, the second flash evaporator and the third flash evaporator are used to gradually reduce the pressure and temperature of the leachate after leaching in the high-pressure / oxygen pressure reactor unit.

[0012] Furthermore, the first flash evaporator is connected to the third preheater for preheating the slurry in the third preheater by flash steam; the second flash evaporator is connected to the second preheater for preheating the slurry in the second preheater by flash steam; the third flash evaporator is connected to the first preheater for preheating the slurry in the first preheater by flash steam.

[0013] Furthermore, the volumes of the first flash evaporator, the second flash evaporator and the third flash evaporator are increased in sequence, and the installation heights of the first flash evaporator, the second flash evaporator and the third flash evaporator are decreased in sequence; the installation heights of the third preheater, the second preheater and the first preheater are decreased in sequence.

[0014] Furthermore, the multi-stage iron removal aluminum chromium unit includes a plurality of sequentially connected iron removal aluminum chromium sub-units, each of which is connected to a neutralizer preparation unit for neutralizing and removing impurities from each iron removal aluminum chromium sub-unit, wherein the first iron removal aluminum chromium sub-unit is connected to a multi-stage countercurrent washing unit for performing a single impurity removal on the washed leachate, and passing the slag phase generated during the impurity removal into the multi-stage countercurrent washing unit; the remaining iron removal aluminum chromium sub-units are connected to a circulating leaching slurry neutralization unit for performing a second impurity removal on the slurry after impurity removal by the previous iron removal aluminum chromium sub-unit, and passing the slag phase generated during the impurity removal into the circulating leaching slurry neutralization unit.

[0015] Furthermore, the pH value of each iron, aluminum and chromium removal subunit for impurity removal gradually increases.

[0016] Furthermore, the last section of the iron, aluminum and chromium removal sub-unit is connected to the manganese, copper, zinc and scandium recovery unit to recover the copper, zinc and scandium elements in the slurry after impurities are removed.

[0017] Furthermore, the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit includes multiple sections of nickel-cobalt-manganese mixed hydroxide synthesis sub-units connected in sequence, and each nickel-cobalt-manganese mixed hydroxide synthesis sub-unit is respectively connected to the neutralizer preparation unit for synthesizing nickel-cobalt-manganese mixed hydroxide. The first section of the nickel-cobalt-manganese mixed hydroxide synthesis sub-unit is connected to the last section of the iron-aluminum-chromium removal sub-unit for precipitating nickel, cobalt and manganese in the leachate after impurities are removed, and the generated slag phase is passed into the crystal manufacturing module. The last section of the nickel-cobalt-manganese mixed hydroxide synthesis sub-unit is connected to the circulating leaching slurry neutralization unit for passing the generated slag phase into the circulating leaching slurry neutralization unit. The remaining nickel-cobalt-manganese mixed hydroxide synthesis sub-units are connected to the manganese, copper, zinc and scandium recovery units for recovering the manganese element in the slag phase.

[0018] Furthermore, it also includes an environmental protection and safety module, which includes a wastewater treatment unit. The wastewater treatment unit is connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit to purify the wastewater generated by it.

[0019] Furthermore, the environmental protection and safety module also includes an exhaust gas treatment unit, which is connected to the first preheater and is used to purify the exhaust gas generated by the first preheater.

[0020] Furthermore, the environmental protection and safety module also includes a tailings treatment unit, which is connected to a multi-stage countercurrent washing unit for neutralizing the tailings.

[0021] Furthermore, the environmental protection and safety module also includes a fire protection unit, which is used to provide fire protection services.

[0022] Furthermore, it also includes an energy supply module, which includes a pure water preparation unit. The pure water preparation unit is connected to the multi-stage countercurrent washing unit and the ore washing unit to supply water to the multi-stage countercurrent washing unit and the ore washing unit.

[0023] Furthermore, the energy supply module also includes a boiler unit, which is connected to the high-pressure / oxygen-pressure reactor unit to provide high-pressure steam to the high-pressure / oxygen-pressure reactor unit.

[0024] Furthermore, the energy supply module also includes a power distribution unit, which is connected to other units to provide electrical energy.

[0025] Furthermore, the energy supply module also includes a DCS integrated control unit, which is connected to other units to control their working states.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides an equipment system for preparing nickel, cobalt and manganese raw materials for new energy from laterite nickel ore. The system modularly designs multiple process steps such as raw material supply, leaching reaction, neutralization and impurity removal, nickel, cobalt and manganese mixed hydroxide synthesis, crystal manufacturing, ternary precursor manufacturing, and ternary positive electrode material manufacturing, thereby significantly improving the removal efficiency of impurity metal elements such as iron, aluminum, and chromium; at the same time, efficient extraction of nickel, cobalt and manganese is achieved, and resources such as copper, zinc, scandium, iron, and chromium are comprehensively recovered. The obtained nickel, cobalt and manganese salt crystals can be directly used for the preparation of ternary precursors, significantly reducing production costs; the present invention overcomes the defects of existing technologies and processes, and lies in the green technology and process for the simultaneous extraction of nickel, cobalt and manganese from low-grade laterite nickel ore, which not only achieves efficient simultaneous extraction of nickel, cobalt and manganese, but also adopts green technology and clean production processes for energy conservation and emission reduction, and effectively recycles and safely disposes of wastewater, waste residue and waste gas, with the advantages of energy conservation, carbon reduction and pollution reduction, and implements the maximum comprehensive recovery of nickel, cobalt and manganese, effectively resolving the contradiction between the demand for strategic scarce resources of nickel, cobalt and manganese from new energy, and fully complies with the global green development and dual-carbon economy trends. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a block diagram of an equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to the present invention;

[0029] FIG2 is a schematic structural diagram of an equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to the present invention;

[0030] FIG3 is a schematic structural diagram of a partial structure of a leaching reaction module in an equipment system for preparing nickel, cobalt and manganese raw materials for new energy from laterite nickel ore according to the present invention;

[0031] FIG4 is a schematic structural diagram of a partial structure of a leaching reaction module in an equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to the present invention;

[0032] FIG5 is a schematic structural diagram of a partial structure of a leaching reaction module in the equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to the present invention.

[0033] Description of reference numerals:

[0034] Raw material supply module a; ore blending unit a1; ore washing unit a2; ore dressing unit a3; ore grinding unit a4; thickening unit a5; neutralizing agent preparation unit a6; acid preparation unit a7; precipitation accelerator preparation unit a8;

[0035] Leaching reaction module b; multi-stage preheating unit b1; high-pressure / oxygen pressure reactor unit b2; multi-stage flash evaporation unit b3; first preheater b11; second preheater b12; third preheater b13; first flash evaporator b31, second flash evaporator b32; third flash evaporator b33;

[0036] Neutralization and impurity removal module c; circulating leaching slurry neutralization unit c1; multi-stage countercurrent washing unit c2; multi-stage iron, aluminum and chromium removal unit c3;

[0037] Nickel-cobalt-manganese mixed hydroxide synthesis module d; nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit d1; nickel-cobalt-manganese mixed hydroxide finished product packaging unit d2;

[0038] Valuable metal recovery module e; manganese, copper, zinc, and scandium recovery unit e1;

[0039] Crystal manufacturing module f; nickel-cobalt-manganese mixed salt crystal manufacturing unit f1; nickel salt crystal manufacturing unit f2; cobalt salt crystal manufacturing unit f3; manganese salt crystal manufacturing unit f4;

[0040] Ternary precursor manufacturing module g; material preparation unit g1; controlled precipitation reaction unit g2; ternary precursor post-processing unit g3;

[0041] Ternary cathode material preparation module h; lithiation mixing and charging unit h1; high temperature synthesis unit h2; ternary cathode material post-processing unit h3;

[0042] Environmental protection and safety module i; wastewater treatment unit i1; waste gas treatment unit i2; tailings treatment unit i3; fire protection unit i4;

[0043] Energy supply module j; power distribution unit j1; pure water preparation unit j2; boiler unit j3; DCS integrated control unit j4. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0045] Under the general trend of green and intelligent industrial transformation in the world, the park stands at the height of leading the world's green development and highly embodies people-orientedness. It uses the "six-in-one" standards of "greening, safety, technology, quality, intelligence and education" to set up the park. In each area of ​​the park, the "six-in-one" principles of "process-based, automated, clean, safe, information-based and educational" are used as the planning, construction and operation specifications of the park, guiding the park's operation, production, work and life to meet the requirements of global and national laws and regulations on environmental protection and safety, and strive to create an advanced model of global green industry and green operation.

[0046] [Corrected 25.07.2023 according to Rule 91] As shown in Figures 1 to 5, for this purpose, the present invention provides an equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore includes:

[0047] The raw and auxiliary material supply module a includes a blending unit a1, a washing unit a2, a beneficiation unit a3, a grinding unit a4, and a thickening unit a5, which are connected in sequence. It also includes a neutralizer preparation unit a6, an acid preparation unit a7, and a precipitation promoter preparation unit a8. The blending unit a1 is used to prepare ore of the required grade, the washing unit a2 is used to clean the ore, the beneficiation unit a3 is used to separate the chromium iron oxides in the raw laterite nickel ore, the grinding unit a4 is used to grind the ore into the required particle size to obtain a slurry, and the thickening unit a5 is used to concentrate the slurry. The neutralizer preparation unit a6 is used to prepare the neutralizer required for the metallurgical process, which is generally an alkali or alkaline substance. The acid preparation unit a7 is used to prepare the acids required for the metallurgical process, such as common acids such as sulfuric acid, hydrochloric acid, and nitric acid. The precipitation promoter preparation unit a8 is used to manufacture the precipitation promoters required for the metallurgical process, such as flocculants.

[0048] The leaching reaction module b comprises a multi-stage preheating unit b1, a high-pressure / oxygen pressure reactor unit b2, and a multi-stage flash evaporation unit b3, which are connected in sequence. The multi-stage preheating unit b1 is connected to the thickening unit a5 and performs multi-stage preheating of the slurry, bringing the slurry temperature close to the reaction temperature inside the high-pressure / oxygen pressure reactor. The high-pressure / oxygen pressure reactor unit b2 is also connected to the acid preparation unit a7, which introduces acid into the high-pressure / oxygen pressure reactor. The principle of the high-pressure / oxygen pressure reactor unit b2 is to leach metal elements such as nickel, cobalt, and manganese from the slurry through a high-pressure, high-pressure, and strong acid environment. The multi-stage flash evaporation unit b3 is used to reduce the pressure and temperature of the leachate in multiple stages.

[0049] The neutralization and impurity removal module c includes a circulating leaching slurry neutralization unit c1, a multi-stage countercurrent washing unit c2, and a multi-stage iron, aluminum, and chromium removal unit c3. The circulating leaching slurry neutralization unit c1 is connected to the multi-stage flash evaporation unit b3 and the neutralizer preparation unit a6. The neutralizer produced by the neutralizer preparation unit a6 is introduced into the circulating leaching slurry neutralization unit c1 to neutralize excess acid in the leachate from the multi-stage flash evaporation unit b3. The multi-stage countercurrent washing unit c2 is connected to the circulating leaching slurry neutralization unit c1 and is used to wash the neutralized leachate. The multi-stage iron, aluminum, and chromium removal unit c3 is connected to the multi-stage countercurrent washing unit c2, the circulating leaching slurry neutralization unit c1, and the neutralizer preparation unit a6 to remove impurities from the liquid phase of the leachate after washing in the multi-stage countercurrent washing unit c2. The slag removal method is to add neutralizer to the leachate to gradually increase the pH value. The slag phase produced during impurity removal is passed into the multi-stage countercurrent washing unit c2 and the circulating leaching slurry neutralization unit c1 to clean the slag phase or to acid-leach and dissolve the slag phase again.

[0050] The nickel-cobalt-manganese mixed hydroxide synthesis module (d) comprises a multi-stage nickel-cobalt-manganese mixed hydroxide synthesis unit (d1) and a finished nickel-cobalt-manganese mixed hydroxide packaging unit (d2). This unit is connected to a multi-stage iron, aluminum, and chromium removal unit (c3) and a neutralizer preparation unit (a6). The neutralizer is gradually added to the decontaminated leachate, and the pH is gradually increased to precipitate the nickel, cobalt, and manganese in the decontaminated leachate. The nickel, cobalt, and manganese precipitate as nickel-cobalt-manganese mixed hydroxide. The finished nickel-cobalt-manganese mixed hydroxide packaging unit (d2) is connected to the multi-stage nickel-cobalt-manganese mixed hydroxide synthesis unit (d1) and is used to clean, dry, and package the precipitated manganese as nickel-cobalt-manganese mixed hydroxide.

[0051] Valuable metal recovery module e includes a manganese, copper, zinc, and scandium recovery unit e1. This unit is connected to a multi-stage iron removal, aluminum, and chromium removal unit c3 and a multi-stage nickel-cobalt-manganese mixed hydroxide synthesis unit d1 to recover valuable metals such as manganese, copper, zinc, and scandium.

[0052] Crystal production module f includes a nickel-cobalt-manganese mixed salt crystal production unit f1, a nickel salt crystal production unit f2, a cobalt salt crystal production unit f3, and a manganese salt crystal production unit f4. Nickel-cobalt-manganese mixed salt crystal production unit f1 is connected to a multi-stage iron removal, aluminum-chromium removal unit c3 and a multi-stage nickel-cobalt-manganese mixed hydroxide synthesis unit d1 to extract the liquid phase to produce nickel-cobalt-manganese mixed salt crystals. Nickel salt crystal production unit f2, cobalt salt crystal production unit f3, and manganese salt crystal production unit f4 are all connected to a multi-stage iron removal, aluminum-chromium removal unit c3 and a multi-stage nickel-cobalt-manganese mixed hydroxide synthesis unit d1 to extract the liquid phase to produce nickel salt crystals, cobalt salt crystals, and manganese salt crystals, respectively.

[0053] It is easy to understand that the liquid phase extraction after impurity removal by the multi-stage iron removal, aluminum removal and chromium removal unit c3 can be used directly, or the nickel, cobalt and manganese mixed hydroxide prepared by the nickel, cobalt and manganese mixed hydroxide multi-stage synthesis unit d1 can be used for acid dissolution and then extracted. After extraction and crystallization, nickel, cobalt and manganese mixed salt crystals can be obtained, or nickel salt crystals, cobalt salt crystals and manganese salt crystals can be obtained separately. Among them, the nickel, cobalt and manganese mixed salt crystals can be directly used for the manufacture of ternary precursors, and the nickel salt crystals, cobalt salt crystals and manganese salt crystals can be used for other purposes respectively, or they can be used to prepare ternary precursors according to a certain ratio.

[0054] The ternary precursor manufacturing module g comprises a sequentially connected material preparation unit g1, a controlled precipitation reaction unit g2, and a ternary precursor post-processing unit g3. Material preparation unit g1 is connected to the nickel-cobalt-manganese mixed salt crystal manufacturing unit f1, the nickel salt crystal manufacturing unit f2, the cobalt salt crystal manufacturing unit f3, and the manganese salt crystal manufacturing unit f4, and is used to prepare a metal salt solution, an alkaline solution, and a complexing agent. The controlled precipitation reaction unit g2 is used to react the metal salt solution, the alkaline solution, and the complexing agent. The ternary precursor post-processing unit g3 is used to process the reacted materials to obtain the finished ternary precursor.

[0055] Specifically, a nickel-cobalt-manganese mixed salt is used as the mother liquor. Depending on the nickel-cobalt-manganese content in the ternary precursor, one or more of nickel salts, cobalt salts, and manganese salts are added to achieve a suitable ratio for producing the ternary precursor. Furthermore, the ternary precursor can be prepared by combining nickel salt crystal production unit f2, cobalt salt crystal production unit f3, and manganese salt crystal production unit f4 with nickel salt, cobalt salt, and manganese salt in a specific ratio.

[0056] The ternary cathode material preparation module h consists of a sequentially connected lithiation mixing and loading unit h1, a high-temperature synthesis unit h2, and a ternary cathode material post-processing unit h3. The lithiation mixing and loading unit h1 is connected to the ternary precursor post-processing unit g3, which is used to mix the ternary precursor product with the lithium source. The high-temperature synthesis unit h2 is used to perform high-temperature synthesis on the mixed material. The ternary cathode material post-processing unit h3 is used to crush the high-temperature synthesized material and remove magnetic foreign matter.

[0057] In one embodiment, the blending unit a1 performs random ore grade checks and mixes high-grade and low-grade ore in a specific ratio, ensuring that the grade of each batch of ore entering the subsequent process meets the designed grade of the system. The washing unit a2 is used to hydraulically beneficiate the ore and perform preliminary sorting of the ore based on size. The ore unit can be a combination of one or more trough washers and drum washers. The beneficiation unit a3 is used to remove impurities such as chromium ore from the ore to prevent the harder chromium ore from damaging subsequent processing equipment. The beneficiation unit a3 removes chromium ore from the ore using gravity beneficiation equipment or magnetic beneficiation equipment. The grinding unit a4 is used to grind larger ore to meet the requirements of subsequent processes. It should be understood that the grinding unit a4 can be a combination of one or more of a crusher, a grinding mill, and a ball mill. The thickening unit a5 is generally a plurality of thickeners arranged in a continuous arrangement.

[0058] Neutralizer preparation unit a6 is used to prepare a neutralizer, which is an alkali or alkaline substance. Neutralizer preparation unit a6 can use limestone to produce limestone slurry or lime milk. Acid preparation unit a7 can be a device that produces sulfuric acid using a contact process or a nitration process.

[0059] In one embodiment, the multi-stage preheating unit b1 includes a first preheater b11, a second preheater b12, and a third preheater b13, which are connected in sequence. The first preheater b11 is connected to the thickening unit a5, and the third preheater b13 is connected to the high-pressure / oxygen pressure reactor unit b2. The first, second, and third preheaters b11, b12, and b13 are used to sequentially preheat the slurry output from the thickening unit a5. This avoids excessive heating in a single step and reduces equipment requirements.

[0060] Correspondingly, the multi-stage flash evaporation unit b3 includes a first flash evaporator b31, a second flash evaporator b32, and a third flash evaporator b33. The first flash evaporator b31 is connected to the high-pressure / oxygen pressure reactor unit b2, and the third flash evaporator b33 is connected to the circulating leaching slurry neutralization unit c1. The first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 are used to gradually reduce the pressure and temperature of the leachate after leaching in the high-pressure / oxygen pressure reactor unit b2. This avoids excessive single pressure and temperature reduction, reducing equipment requirements.

[0061] Preferably, the first flash evaporator b31 is connected to the third preheater b13 and is used to preheat the slurry in the third preheater b13 using flash steam. The second flash evaporator b32 is connected to the second preheater b12 and is used to preheat the slurry in the second preheater b12 using flash steam. The third flash evaporator b33 is connected to the first preheater b11 and is used to preheat the slurry in the first preheater b11 using flash steam.

[0062] By connecting the first flash evaporator b31 to the third preheater b13, the temperature and pressure of the steam discharged from the first flash evaporator b31 are the highest, which can heat the slurry in the third preheater b13 to a higher temperature, so that the third preheater b13 can fully utilize the heat of the leachate entering the first flash evaporator b31, which facilitates the heating of the slurry in the third preheater b13 and the cooling of the leachate in the first flash evaporator b31.

[0063] By connecting the second flash evaporator b32 to the second preheater b12, the temperature and pressure of the steam discharged from the second flash evaporator b32 are medium, which is suitable for heating the slurry in the second preheater b12 to a medium temperature and also facilitates the leachate in the second flash evaporator b32 to be reduced to a medium temperature.

[0064] By connecting the third flash evaporator b33 to the first preheater b11, the temperature and pressure of the leachate in the third flash evaporator b33 are relatively low, which is suitable for preheating the slurry with relatively low temperature in the first preheater b11, so that the first preheater b11 can use the relatively low temperature flash steam discharged from the first flash evaporator b31 to preheat the slurry with relatively low preheating temperature to be reached in the first preheater b11, so that the first flash evaporator b31, the second flash evaporator b32 and the third flash evaporator b33 can assist the third preheater b13, the second preheater b12 and the first preheater b11 in heating the slurry to a preset temperature.

[0065] In some embodiments, the volumes of the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 increase sequentially, and the heights of the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 decrease sequentially. The heights of the third preheater b13, the second preheater b12, and the first preheater b11 decrease sequentially.

[0066] Since it is necessary to gradually reduce the pressure of the leachate in the first flash evaporator b31, the second flash evaporator b32 and the third flash evaporator b33, in this embodiment, the volumes of the first flash evaporator b31, the second flash evaporator b32 and the third flash evaporator b33 are increased successively, which can reduce the pressure of the leachate entering successively.

[0067] Since the volumes of the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 increase in sequence, if the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 are at the same height, there is a height difference between the discharge port of the leachate of the previous flash evaporator and the feed port of the next flash evaporator, resulting in the need for adjacent flash evaporators to be connected through elbows. Connection through elbows will hinder the flow of leachate and may cause material jamming at the elbows. In this embodiment, by arranging the first flash evaporators b31, the second flash evaporator b32, and the third flash evaporator b33 of different volumes from high to low, the discharge port of the previous flash evaporator is relative to the feed port of the next flash evaporator, so that the leachate of the previous flash evaporator can directly enter the next flash evaporator through a straight pipe without being connected through an elbow, thereby avoiding the occurrence of material jamming.

[0068] Since the installation heights of the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33 are sequentially lowered, in this embodiment, the installation heights of the third preheater b13, the second preheater b12, and the first preheater b11 are sequentially lowered. This allows the installation heights of the third preheater b13, the second preheater b12, and the first preheater b11 to match those of the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33, making it easier for the third preheater b13, the second preheater b12, and the first preheater b11 to utilize the flash steam from the first flash evaporator b31, the second flash evaporator b32, and the third flash evaporator b33.

[0069] The three-dimensional layout makes full use of the vertical height, reducing the plant area occupied and increasing product output per unit area. It also fully utilizes gravity, requiring only the slurry to be pumped into the highest tank, which then automatically flows to the other tanks, reducing the number of pumps required.

[0070] In one embodiment, the multi-stage iron removal aluminum chromium unit c3 includes multiple iron removal aluminum chromium sub-units connected in sequence, and each iron removal aluminum chromium sub-unit is respectively connected to the neutralizer preparation unit a6 and the precipitation promoter preparation unit a8 for neutralizing and removing impurities from each iron removal aluminum chromium sub-unit.

[0071] The first iron-aluminum-chromium removal subunit is connected to the multi-stage countercurrent washing unit C2. This first iron-aluminum-chromium removal subunit is used to remove impurities from the washed leachate. The slag phase produced during this removal process is then passed through the multi-stage countercurrent washing unit C2 to clean any solution carried over from the slag phase, preventing waste. The slag phase is then neutralized with tailings and discharged as tailings. The remaining iron-aluminum-chromium removal subunits are connected to the circulating leaching slurry neutralization unit C1 to further remove impurities from the slurry removed by the previous iron-aluminum-chromium removal subunit. The slag phase produced during this removal process is then passed through the circulating leaching slurry neutralization unit C1.

[0072] The pH value of each iron removal, aluminum removal, and chromium subunit gradually increases. That is, the pH value of the first iron removal, aluminum removal, and chromium subunit is the lowest. According to experimental tests, the slag phase produced by the first iron removal, aluminum removal, and chromium subunit mainly contains iron, aluminum, and chromium, and contains very little nickel, cobalt, and manganese, and can be discarded as tailings. The slag phase produced by the other iron removal, aluminum removal, and chromium subunits contains not only iron, aluminum, and chromium, but also non-negligible nickel, chromium, and manganese. Discarding it will cause a huge loss of nickel, cobalt, and manganese, so the slag phase is introduced into the circulating leaching slurry neutralization unit c1 and acid-leached and dissolved again. After the impurity removal treatment of the multi-stage iron removal, aluminum removal, and chromium unit c3, the content of metal ions such as iron, aluminum, and chromium in the solution can be ignored, and it can be regarded as that the iron, aluminum, and chromium are completely removed.

[0073] In some embodiments, the last iron, aluminum and chromium removal subunit is connected to the manganese, copper, zinc and scandium recovery unit e1 to recover the copper, zinc and scandium elements in the impurity-removed slurry through an extraction process.

[0074] In some embodiments, the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit d1 includes multiple sequentially connected nickel-cobalt-manganese mixed hydroxide synthesis subunits. Each nickel-cobalt-manganese mixed hydroxide synthesis subunit is respectively connected to the neutralizer preparation unit a6 and the precipitation accelerator preparation unit a8 for synthesizing the nickel-cobalt-manganese mixed hydroxide.

[0075] The first nickel-cobalt-manganese mixed hydroxide synthesis subunit is connected to the last iron-aluminum-chromium removal subunit, which is used to precipitate the nickel, cobalt, and manganese in the leachate after impurities are removed. The resulting slag phase is then passed to the crystal manufacturing module f as a raw material for preparing nickel-cobalt-manganese mixed salt or for preparing nickel salt, cobalt salt, and manganese salt respectively. The last nickel-cobalt-manganese mixed hydroxide synthesis subunit is connected to the circulating leaching slurry neutralization unit c1 to pass the resulting slag phase to the circulating leaching slurry neutralization unit c1 to dissolve and recover the nickel, cobalt, and manganese in the slag phase. The remaining nickel-cobalt-manganese mixed hydroxide synthesis subunits are connected to the manganese, copper, zinc, and scandium recovery unit e1 to recover the manganese element in the slag phase.

[0076] In some embodiments, the system also includes an environmental protection and safety module i, which includes a wastewater treatment unit i1. The wastewater treatment unit i1 is connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit d1 to purify the wastewater generated by it to meet emission standards.

[0077] The environmental protection and safety module i also includes an exhaust gas treatment unit i2, which is connected to the first preheater b11 and is used to purify the exhaust gas generated there. Acidic vapors generated in each flash tank are directed to the corresponding preheater to preheat the slurry. Finally, they are collected in the first preheater b11 and discharged. Then, they are piped into the exhaust gas treatment unit i2 for harmless treatment.

[0078] The environmental protection and safety module i also includes a tailings treatment unit i3, which is connected to the multi-stage countercurrent washing unit c2 for neutralizing the tailings before discharge.

[0079] The environmental protection and safety module i also includes a firefighting unit i4, which is used to provide firefighting services. The firefighting unit i4 includes facilities and equipment such as fire trucks, fire stations, fire hydrants, and fire pipe networks, and is equipped with professional firefighters to respond to sudden fire hazards.

[0080] The system also includes an energy supply module j, which includes a pure water preparation unit j2. This unit is connected to the multi-stage countercurrent washing unit c2 and the ore washing unit a2, and is used to prepare external water into pure water that meets process standards and supplies water to the multi-stage countercurrent washing unit c2 and the ore washing unit a2. The energy supply module j also includes a boiler unit j3, which is connected to the pure water preparation unit j2 and the high-pressure / oxygen-pressure reactor unit b2 to provide high-pressure steam to the high-pressure / oxygen-pressure reactor unit b2.

[0081] The energy supply module j further includes a power distribution unit j1 , which is connected to other units to provide electrical energy.

[0082] The energy supply module j also includes a DCS integrated control unit j4, which is connected to all other units to monitor and control the operating status of each module and control the entire plant's production, processes, logistics, safety, and environmental indicators. As you can imagine, the power distribution unit j1 also supplies power to the DCS integrated control unit j4.

[0083] It should be understood that in this application, all steps involving the need for slurry transportation can be carried out by slurry pumps, transfer pumps, etc. It should be understood that in this application, all references to iron, aluminum, chromium, nickel, cobalt, and manganese refer to compounds containing the metal elements or solutions containing the metal element ions, rather than metal elements.

[0084] The percentage of the total area occupied by each module of this system is shown in the following table:

[0085] This system utilizes a modular, three-dimensional, and compact design approach to optimize plant layout, reduce plant floor space, and maximize output per square meter. Furthermore, the rational arrangement of modules reduces the total length of pipelines, thereby reducing overall pumping energy consumption and ensuring a smooth process flow. A three-dimensional design is employed for some modules to fully utilize gravity to drive liquid flow, reducing the number of drive pumps required. Furthermore, the modules are neatly and aesthetically arranged, and the road design is optimized to achieve pedestrian and vehicle separation and smooth material transportation.

[0086] In one example, the plant covers a total area of ​​70.4 hectares, with a total investment of $1.6 billion. It processes 22.8 million tons of ore annually, producing 126,000 tons of nickel metal. The ore used for production has a moisture content of approximately 40% and a grade of 1%, resulting in a calculated nickel extraction rate of 92%. Based on a nickel price of $20,000 per ton, the annual output value is $2.52 billion. The investment intensity reaches $22.73 million per hectare, or 160 million RMB per hectare, and the land productivity reaches $35.8 million per hectare, or 260 million RMB per hectare. According to the revised "Industrial Project Construction Land Control Indicators" released by the Ministry of Natural Resources on June 25, the fixed asset investment intensity control value (10,000 yuan per hectare) for item 32, non-ferrous metal smelting and rolling processing, is greater than 38.85 million yuan per hectare for the first, second, third, and fourth grades. The international reference value for the land productivity control indicator is 90 million yuan per hectare. Clearly, in this example, the investment intensity far exceeds the national standard, and the land productivity also far exceeds the international reference value, reaching internationally leading levels.

[0087] The present invention overcomes the defects of existing technologies and processes by using green technologies and processes for the simultaneous extraction of nickel, cobalt and manganese from low-grade laterite nickel ore. It not only achieves the efficient simultaneous extraction of nickel, cobalt and manganese, but also adopts green technologies and clean production processes for energy conservation and emission reduction, and effectively and safely disposes of wastewater, waste residue and waste gas in a circular manner. It has the advantages of energy conservation, carbon reduction and pollution reduction, and implements the maximum comprehensive recovery of nickel, cobalt and manganese, effectively resolving the contradiction between the demand for new energy and the strategic scarce resources of nickel, cobalt and manganese, and fully conforms to the global trend of green development and dual-carbon economy.

[0088] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. An equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore, characterized in that: include: The raw and auxiliary material supply module includes an ore blending unit, an ore washing unit, an ore dressing unit, an ore grinding unit and a thickening unit which are connected in sequence, and also includes a neutralizer preparation unit, an acid preparation unit and a precipitation accelerator preparation unit. The ore blending unit is used to blend ore of a required grade, the ore washing unit is used to clean the ore, the ore dressing unit is used to separate the chromium iron oxide in the ore, the ore grinding unit is used to grind the ore into a required particle size to obtain a slurry, and the thickening unit is used to concentrate the slurry; The leaching reaction module comprises a multi-stage preheating unit, a high-pressure / oxygen-pressure reactor unit and a multi-stage flash unit which are connected in sequence, wherein the multi-stage preheating unit is connected to the thickening unit and is used to perform multi-stage preheating on the slurry, the high-pressure / oxygen-pressure reactor unit is also connected to the acid preparation unit and is used to leach the minerals in the slurry, and the multi-stage flash unit is used to perform multi-stage pressure reduction and temperature reduction on the leachate; A neutralization and impurity removal module, comprising a circulating leaching slurry neutralization unit, a multi-stage countercurrent washing unit and a multi-stage iron, aluminum and chromium removal unit, wherein the circulating leaching slurry neutralization unit is connected to the multi-stage flash unit and the neutralizer preparation unit, and is used to neutralize the leachate of the multi-stage flash unit; The multi-stage countercurrent washing unit is connected to the circulating leaching slurry neutralization unit, and is used to wash the neutralized leachate; the multi-stage iron, aluminum and chromium removal unit is connected to the multi-stage countercurrent washing unit, the circulating leaching slurry neutralization unit and the neutralizer preparation unit, and is used to remove impurities from the washed leachate, and pass the slag phase generated during the impurity removal into the multi-stage countercurrent washing unit and the circulating leaching slurry neutralization unit; The nickel-cobalt-manganese mixed hydroxide synthesis module comprises a nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit and a nickel-cobalt-manganese mixed hydroxide finished product packaging unit. The nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit is connected to the multi-stage iron removal, aluminum-chromium removal unit and the neutralizer preparation unit, and is used for precipitating nickel, cobalt and manganese in the leaching solution after impurities are removed; the nickel-cobalt-manganese mixed hydroxide finished product packaging unit is connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit, and is used for packaging the precipitate; A valuable metal recovery module, including manganese, copper, zinc, and scandium recovery units, wherein the manganese, copper, zinc, and scandium recovery units are connected to the multi-stage iron removal aluminum chromium unit and the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit to recover valuable metals such as manganese, copper, zinc, and scandium; Crystal manufacturing module, including nickel-cobalt-manganese mixed salt crystal manufacturing unit, nickel salt crystal manufacturing unit, cobalt A nickel-cobalt-manganese mixed salt crystal manufacturing unit and a manganese salt crystal manufacturing unit, wherein the nickel-cobalt-manganese mixed salt crystal manufacturing unit is connected to the multi-stage iron removal aluminum-chromium unit and the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit, and is used to extract the liquid phase to obtain nickel-cobalt-manganese mixed salt crystals, and the nickel salt crystal manufacturing unit, the cobalt salt crystal manufacturing unit and the manganese salt crystal manufacturing unit are all connected to the multi-stage iron removal aluminum-chromium unit and the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit, and are used to extract the liquid phase to obtain nickel salt crystals, cobalt salt crystals and manganese salt crystals, respectively; The ternary precursor manufacturing module comprises a material preparation unit, a controlled precipitation reaction unit and a ternary precursor post-processing unit which are connected in sequence, wherein the material preparation unit is connected to a nickel-cobalt-manganese mixed salt crystal manufacturing unit and is connected to the nickel salt crystal manufacturing unit, the cobalt salt crystal manufacturing unit and the manganese salt crystal manufacturing unit, and is used to prepare a metal salt solution, an alkali solution and a complexing agent, the controlled precipitation reaction unit is used to react the metal salt solution, the alkali solution and the complexing agent, and the ternary precursor post-processing unit is used to process the reacted material to obtain a ternary precursor finished product; The ternary cathode material preparation module includes a lithiation mixing and loading unit, a high-temperature synthesis unit and a ternary cathode material post-processing unit which are connected in sequence. The lithiation mixing and loading unit is connected to the ternary precursor post-processing unit and is used to mix the ternary precursor product with the lithium source. The high-temperature synthesis unit is used to perform high-temperature synthesis on the mixed logistics. The ternary cathode material post-processing unit is used to crush the material after high-temperature synthesis and remove magnetic foreign matter.

2. The equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore according to claim 1, characterized in that: The multi-stage preheating unit includes a first preheater, a second preheater, and a third preheater which are connected in sequence. The first preheater is connected to the thickening unit, and the third preheater is connected to the high-pressure / oxygen pressure reactor unit. The first preheater, the second preheater, and the third preheater are used to preheat the slurry output from the thickening unit step by step.

3. The equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore according to claim 2, characterized in that: The multi-stage flash unit includes a first flash evaporator, a second flash evaporator and a third flash evaporator, the first flash evaporator is connected to the high-pressure / oxygen pressure reactor unit, the third flash evaporator is connected to the circulating leaching slurry neutralization unit, and the first flash evaporator, the second flash evaporator and the third flash evaporator are used to gradually reduce the pressure and temperature of the leachate after leaching from the high-pressure / oxygen pressure reactor unit.

4. The equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore according to claim 3, characterized in that: The first flash evaporator is connected to the third preheater for preheating the slurry in the third preheater by flash steam; the second flash evaporator is connected to the second preheater for preheating the slurry in the second preheater by flash steam, and the third flash evaporator is connected to the first preheater for preheating the slurry in the first preheater by flash steam.

5. The equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore according to claim 4, characterized in that: The volumes of the first flash evaporator, the second flash evaporator and the third flash evaporator are increased in sequence, and the installation heights of the first flash evaporator, the second flash evaporator and the third flash evaporator are decreased in sequence; the installation heights of the third preheater, the second preheater and the first preheater are decreased in sequence.

6. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 5, characterized in that: The multi-stage iron removal aluminum chromium unit comprises a plurality of sequentially connected iron removal aluminum chromium sub-units, each of which is connected to the neutralizer preparation unit, respectively, for neutralizing and removing impurities from each of the iron removal aluminum chromium sub-units, wherein the first stage of the iron removal aluminum chromium sub-unit is connected to the multi-stage countercurrent washing unit, for once removing impurities from the washed leaching solution, and passing the slag phase generated during the impurity removal into the multi-stage countercurrent washing unit; The remaining iron-aluminum-chromium removal subunits are connected to the circulating leaching slurry neutralization unit to remove impurities from the slurry removed by the previous iron-aluminum-chromium removal subunit, and the slag phase generated during the removal is passed into the circulating leaching slurry neutralization unit.

7. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 6, characterized in that: The pH value of impurity removal of each of the iron, aluminum and chromium removal subunits gradually increases.

8. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 6, characterized in that: The iron, aluminum and chromium removal subunit in the last section is connected to the manganese, copper, zinc and scandium recovery unit to recover the copper, zinc and scandium elements in the slurry after impurities are removed.

9. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 6, characterized in that: The nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit includes multiple sections of nickel-cobalt-manganese mixed hydroxide synthesis subunits connected in sequence, each of the nickel-cobalt-manganese mixed hydroxide synthesis subunits is respectively connected to the neutralizer preparation unit for synthesizing nickel-cobalt-manganese mixed hydroxide, the first section of the nickel-cobalt-manganese mixed hydroxide synthesis subunit is connected to the last section of the iron-aluminum-chromium removal subunit for precipitating nickel, cobalt and manganese in the leaching solution after impurities are removed, and the generated slag phase is passed into the crystal manufacturing module, the last section of the nickel-cobalt-manganese mixed hydroxide synthesis subunit is connected to the circulating leaching slurry neutralization unit for passing the generated slag phase into the circulating leaching slurry neutralization unit, and the remaining nickel-cobalt-manganese mixed hydroxide synthesis subunits are connected to the manganese, copper, zinc and scandium recovery units for recovering the manganese element in the slag phase.

10. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 9, characterized in that: It also includes an environmental protection and safety module, which includes a wastewater treatment unit. The wastewater treatment unit is connected to the nickel-cobalt-manganese mixed hydroxide multi-stage synthesis unit to purify the wastewater generated by it.

11. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 10, characterized in that: The environmental protection and safety module further comprises an exhaust gas treatment unit, which is connected to the first preheater and is used for purifying the exhaust gas generated by the first preheater.

12. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 10, characterized in that: The environmental protection and safety module further comprises a tailings treatment unit, which is connected to the multi-stage countercurrent washing unit and is used for neutralizing the tailings.

13. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 10, characterized in that: The environmental protection and safety module further comprises a fire fighting unit, and the fire fighting unit is used for providing fire fighting services.

14. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 1, characterized in that: It also includes an energy supply module, which includes a pure water preparation unit. The pure water preparation unit is connected to the multi-stage countercurrent washing unit and the ore washing unit to supply water to the multi-stage countercurrent washing unit and the ore washing unit.

15. The equipment system for preparing new energy nickel-cobalt-manganese raw materials from laterite nickel ore according to claim 1, characterized in that: The energy supply module further comprises a boiler unit, which is connected to the high-pressure / oxygen-pressure reactor unit to provide high-pressure steam to the high-pressure / oxygen-pressure reactor unit.

16. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 10, characterized in that: The energy supply module also includes a power distribution unit, which is connected to other units to provide electrical energy.

17. The equipment system for preparing new energy nickel, cobalt and manganese raw materials from laterite nickel ore according to claim 10, characterized in that: The energy supply module also includes a DCS integrated control unit, which is connected to other units to control their working states.

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