Abstract: A method for extracting metals from saprolite laterite nickel ore includes: separating and grinding the saprolite laterite nickel ore to obtain a laterite nickel ore powder; mixing the laterite nickel ore powder, water, an acid, and a reducing agent to perform atmospheric pressure acid leaching to obtain a leaching residue and a leaching solution; adding a soluble fluoride salt and sodium salt to the leaching solution to obtain a silicon-aluminum residue and a de-silicon-aluminumed liquid; adding a phosphorus source to the de-silicon-aluminumed liquid, and performing solid-liquid separation to obtain an iron phosphate and a de-ironed liquid; subjecting the de-ironed liquid to a one-step cyclone electrolysis to obtain a zinc-chromium alloy and a one-step cyclone electrolyzed liquid; subjecting the one-step cyclone electrolyzed liquid to a two-step cyclone electrolysis to obtain a nickel-cobalt alloy, a manganese oxide, and a two-step cyclone electrolyzed liquid; and adding sodium carbonate to the two-step cycl

Abstract: Disclosed is a high-pressure reactor comprising a reactor with one end as a feed inlet and the other end as a discharge outlet. Inside the reactor, a plurality of partition plates are arranged along the material flow direction, dividing the interior cavity of the reactor into multiple compartments; on the compartment for feeding material, an ore pulp inlet, a steam inlet, and an acid inlet are sequentially arranged circumferentially along the stirring direction with the mixing device in the compartment as the axis. In this disclosure, after the ore pulp enters the reactor vessel, under the stirring action of the mixing device, the ore pulp first comes into contact with steam to continue heating up, and then it contacts the acid to react with it. The reaction with the acid is exothermic, and the heat generated by the reaction is utilized to heat the newly incoming ore pulp.

Abstract: Disclosed is a system and method for reducing moisture content and impurity content of nickel cobalt hydroxide, the system comprises a thickener, a cleaning equipment, a pressure filtration equipment, and a transit silo; the cleaning equipment comprises a shell, a mixing device, and a steam pipe. The shell is equipped with a cleaning tank, and also features a material inlet, a steam inlet, and a material outlet. The steam pipe is wrapped around the periphery of the transit silo, with its outlet connected to the steam inlet. The steam pipe serves to transfer steam that has exchanged heat with the materials inside the transit silo into the cleaning tank. Through the processes in the thickener, the cleaning equipment, and the pressure filtration equipment, as well as heat exchange with steam inside the transit silo, moisture content and impurity content of the material are further reduced, facilitating subsequent processing.

Abstract: A method for extracting nickel-cobalt-manganese from laterite nickel ore by acid leaching includes the following steps: firstly, subjecting the laterite nickel ore to crushing and a physical separation treatment to separate out chromite and first tailings; then, subjecting the first tailings to a staged concentration treatment to obtain a first ore pulp; then, subjecting the first ore pulp to an atmospheric pressure acid leaching treatment to obtain a second ore pulp; then, subjecting the second ore pulp to microwave treatment; and finally, subjecting the second ore pulp to a solid-liquid separation treatment to obtain a tailing residue and a leaching solution containing nickel-cobalt-manganese. The method cannot only effectively reduce the entry of chromium metal into the leaching solution through physical sorting, but also promote the leaching of nickel-cobalt-manganese through pulp adjustment and microwave treatment.

Abstract: A short-flow nickel-cobalt-manganese co-extraction process for laterite nickel ore hydrometallurgy falls within the technical field of hydrometallurgy. The process includes the following steps: co-extracting an iron-aluminum removal leaching solution of the laterite nickel ore by using an organic acid extraction system to obtain an enriched nickel-cobalt-manganese solution; extracting impurities from the enriched nickel-cobalt-manganese solution by using a P204 extraction system to obtain a high-purity nickel-cobalt-manganese solution. The co-extraction process of the disclosure simplifies the current hydrometallurgical process flow for extracting nickel-cobalt-manganese from the laterite nickel ore, greatly reduces the acid, alkali, and extractant usage, energy consumption, and water consumption in the extraction process, and reduces the cost of nickel-cobalt-manganese extraction, which is of great significance for the industrial production of ternary nickel-cobalt-manganese raw materials.

Abstract: Disclosed is a green method for hydrometallurgical production of a nickel-cobalt-manganese new energy raw material from laterite nickel ore.

Abstract: A comprehensive utilization method for valuable elements in hydrometallurgical slag of laterite nickel ore, comprising the following steps: S1. placing an iron-aluminum slag produced by laterite nickel ore hydrometallurgy in a tube furnace, and introducing an HCl gas stream for a one-stage distillation at 185-290° C. to obtain a one-stage distillation tail gas and a one-stage distillation residue; and condensing the one-stage distillation tail gas to obtain anhydrous AlCl3; S2. introducing an HCl gas stream to the one-stage distillation residue for a two-stage distillation at 320-500° C. to obtain a two-stage distillation tail gas and a two-stage distillation residue; and condensing the two-stage distillation tail gas to obtain anhydrous FeCl3; S3.

Abstract: A cathode material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing a vanadium source, a complexing agent and a high-molecular polymer with an organic solvent to obtain a mixed solution; (2) respectively performing an atomization treatment on the mixed solution and a metal salt solution, and respectively conveying the mixed solution and the metal salt solution with a gas into a spray pyrolysis furnace to perform mixed pyrolysis, so as to obtain a coated precursor; and (3) mixing the coated precursor with a lithium source or a sodium source, and sintering same to obtain a cathode material. By using a spray pyrolysis method, the tap density and uniformity of the precursor are improved while the precursor is coated, such that a cathode material having good performance can be prepared.

Abstract: A method for extracting metals from saprolite laterite nickel ore includes: separating and grinding the saprolite laterite nickel ore to obtain a laterite nickel ore powder; mixing the laterite nickel ore powder, water, an acid, and a reducing agent to perform atmospheric pressure acid leaching to obtain a leaching residue and a leaching solution; adding a soluble fluoride salt and sodium salt to the leaching solution to obtain a silicon-aluminum residue and a de-silicon-aluminumed liquid; adding a phosphorus source to the de-silicon-aluminumed liquid, and performing solid-liquid separation to obtain an iron phosphate and a de-ironed liquid; subjecting the de-ironed liquid to a one-step cyclone electrolysis to obtain a zinc-chromium alloy and a one-step cyclone electrolyzed liquid; subjecting the one-step cyclone electrolyzed liquid to a two-step cyclone electrolysis to obtain a nickel-cobalt alloy, a manganese oxide, and a two-step cyclone electrolyzed liquid; and adding sodium carbonate to the two-step cycl

Abstract: Disclosed is a system and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore, the system comprises an autoclave, a subsequent processing equipment, and a control device; the autoclave comprises a kettle body, a first feeding pipe, a second feeding pipe, and a discharge pipe, the subsequent processing equipment is connected to the discharge pipe and is used to process the reactants; the control device comprises a first valve, a second valve, a first pressure sensor, a second pressure sensor, an aluminum ion detection device, and a control unit. This disclosure can maintain the aluminum ion concentration in the leachate within an appropriate range, effectively reducing fluctuations in the production process, achieving stable production, and lowering production and maintenance costs.

Abstract: Disclosed is a combined treatment method for laterite nickel ore hydrometallurgical slag and phosphating slag, the combined treatment method includes uniformly mixing a laterite nickel ore hydrometallurgical slag, a phosphating slag, and a sodium alkaline salt to obtain a mixed material; subjecting the mixed material to sodium reduction roasting to obtain a roasted material; leaching the roasted material with water and filtering to obtain a water leaching solution and a water leaching slag; subjecting the water leaching slag to magnetic separation to obtain an iron concentrate. In the disclosure, by mixing a laterite nickel ore hydrometallurgical slag and a phosphating slag and then performing sodium reduction roasting, the iron exists in the form of Fe3O4 and elements such as manganese and zinc exist in the slag in the form of oxides, and during the roasting process, aluminum oxides react with alkali to be converted into sodium aluminate.

Abstract: A method for improving the particle size and morphology of a neutralizing agent used in the laterite nickel ore hydrometallurgy, in a process flow for producing nickel-cobalt-manganese hydroxide by the laterite nickel ore hydrometallurgy, a nickel-cobalt-manganese-containing feed liquid is subjected to one-stage iron-aluminum removal treatment and two-stage iron-aluminum removal treatment by using a neutralizing agent successively, wherein the ?200 mesh sieving rate by mass ratio of the neutralizing agent is 85%-90%, and the spherical coefficient of solid particles of the neutralizing agent is not less than 0.6. In the disclosure, the particle size and morphology of the neutralizing agent are respectively improved so as to be used in the steps of one-stage iron-aluminum removal treatment and two-stage iron-aluminum removal treatment.

Abstract: A method for improving the particle size and morphology of a neutralizing agent used in the laterite nickel ore hydrometallurgy, in a process flow for producing nickel-cobalt-manganese hydroxide by the laterite nickel ore hydrometallurgy, a nickel-cobalt-manganese-containing feed liquid is subjected to one-stage iron-aluminum removal treatment and two-stage iron-aluminum removal treatment by using a neutralizing agent successively, wherein the ?200 mesh sieving rate by mass ratio of the neutralizing agent is 85%-90%, and the spherical coefficient of solid particles of the neutralizing agent is not less than 0.6. In the disclosure, the particle size and morphology of the neutralizing agent are respectively improved so as to be used in the steps of one-stage iron-aluminum removal treatment and two-stage iron-aluminum removal treatment.

Abstract: A comprehensive utilization method for valuable elements in hydrometallurgical slag of laterite nickel ore, comprising the following steps: S1. placing an iron-aluminum slag produced by laterite nickel ore hydrometallurgy in a tube furnace, and introducing an HCl gas stream for a one-stage distillation at 185-290°° C. to obtain a one-stage distillation tail gas and a one-stage distillation residue; and condensing the one-stage distillation tail gas to obtain anhydrous AlCl3; S2. introducing an HCl gas stream to the one-stage distillation residue for a two-stage distillation at 320-500°° C. to obtain a two-stage distillation tail gas and a two-stage distillation residue; and condensing the two-stage distillation tail gas to obtain anhydrous FeCl3; S3.

Abstract: The present disclosure discloses a system for preparing new energy Ni—Co—Mn raw material from laterite nickel Ore. The system includes a raw auxiliary material supply module, a leaching reaction module, a neutralization and purification module, a neutralization and purification module, a Ni—Co—Mn mixed hydroxide synthesis module, a valuable metal recovery module, a crystal manufacturing module, a ternary precursor manufacturing module, and a ternary positive material manufacturing module. The present disclosure overcomes the defects of prior art and process, and is a green technology and process for simultaneous extraction of nickel, cobalt and manganese from low-grade laterite nickel ore, which not only realizes simultaneous and efficient extraction of nickel, cobalt and manganese, but also adopts energy-saving and emission reduction green technology and clean production technology to effectively recycle and safely dispose of waste water, waste residue and waste gas.

Abstract: Disclosed is a combined treatment method for laterite nickel ore hydrometallurgical slag and phosphating slag, the combined treatment method includes uniformly mixing a laterite nickel ore hydrometallurgical slag, a phosphating slag, and a sodium alkaline salt to obtain a mixed material; subjecting the mixed material to sodium reduction roasting to obtain a roasted material; leaching the roasted material with water and filtering to obtain a water leaching solution and a water leaching slag; subjecting the water leaching slag to magnetic separation to obtain an iron concentrate. In the disclosure, by mixing a laterite nickel ore hydrometallurgical slag and a phosphating slag and then performing sodium reduction roasting, the iron exists in the form of Fe3O4 and elements such as manganese and zinc exist in the slag in the form of oxides, and during the roasting process, aluminum oxides react with alkali to be converted into sodium aluminate.

Abstract: A dynamic optimization method for acid-to-ore ratio in high-pressure leaching of laterite nickel ore includes: obtaining a feed ore composition, a pulp concentration, a pulp flow rate, a leaching temperature and a pulp duration time in an autoclave, and setting a target leaching rate of nickel; setting a flow rate of sulfuric acid; obtaining a relationship between a hydrogen ion concentration in a solution and a reaction time; obtaining a theoretical leaching rate of nickel when a leaching time reaches the pulp duration time in the autoclave; comparing the theoretical leaching rate of nickel with the target leaching rate of nickel; adjusting the set flow rate of the sulfuric acid until the theoretical leaching rate of nickel is equal to the target leaching rate of nickel, calculating a corresponding optimal acid-to-ore ratio; and adjusting an opening degree of a sulfuric acid flow regulating valve of the autoclave.

Abstract: A method for green and low-cost extraction of nickel-cobalt from laterite nickel ore includes: (1) iron removing pretreatment: adding an iron removing agent to a high-pressure leaching solution of the laterite nickel ore to reduce an iron concentration to less than 0.2 g/L to obtain a laterite nickel ore leaching solution; (2) nickel adsorption: adsorbing and enriching nickel in the laterite nickel ore leaching solution using a first resin adsorption process to obtain a nickel adsorption resin and a nickel adsorption tail liquid; wherein the nickel adsorption resin is desorbed to obtain a crude nickel solution; (3) cobalt adsorption: subjecting the nickel adsorption tail liquid to cobalt adsorption and enrichment by a second resin adsorption process to obtain a cobalt solution by desorbing; (4) copper adsorption: subjecting the crude nickel solution to a third resin adsorption process for removing copper to obtain a purified nickel solution.

Abstract: A treatment method for laterite nickel ore by curing and roasting-water leaching-atmospheric pressure acid leaching is provided. The treatment method includes the following steps: mixing a laterite nickel ore dry powder, concentrated sulfuric acid, and sodium fluoride uniformly, performing curing and roasting under a reducing atmosphere to obtain a cured material; performing water leaching on the cured material to obtain a water leaching solution and a water leaching slag after filtration; and performing atmospheric pressure acid leaching on the water leaching slag to obtain an acid leaching solution and an acid leaching slag after filtration.

Abstract: Disclosed is a method for continuously preparing mixed hydroxide precipitate from a laterite nickel ore by hydrometallurgy. Primary-precipitated mixed hydroxide precipitate particles are used as crystal nuclei, by controlling precipitation process conditions, the quantity of the crystal nuclei, and reaction time of the crystal nuclei, primary mixed hydroxide precipitate crystal nuclei gradually grow, and crystal forms become larger. By controlling the number of cycles, a proportion of returned seed crystals, and a homogenization ratio with precipitants, mixed hydroxide precipitate particles with narrow particle size distribution, dense particles, and better sedimentation effect are obtained, thereby reducing a moisture content of mixed hydroxide precipitate. The preparation method in this disclosure plays a certain guiding role in practical production and has good application prospects.