GEM CO., LTD.

Disclosed is cylindrical ore washer for hydrometallurgical smelting of laterite nickel ore, comprising a mounting bracket, a screening component, a regulator, and an ore-washing component. The screening component comprises a frame, a cylinder body, a screening cylinder, and a driving component. The cylinder body is rotatably mounted on the frame along an axis oriented in a first direction. The screening cylinder is housed within the cylinder body, with a feed inlet and a discharge outlet located at opposite ends along the first direction, respectively. The cylindrical wall of the screening cylinder is provided with multiple screen holes, and an inner side wall of the screening cylinder protrudes to form a baffle plate. This disclosure is capable of impeding the movement of ore towards the discharge outlet, thereby prolonging the residence time of the ore within the screening cylinder and enhancing both the ore-washing efficiency and cleaning effectiveness.

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.

The disclosure discloses a method for preparing battery-grade nickel-cobalt-manganese sulfate crystals from low nickel matte, which includes the following steps: S 1 , sequentially performing high-pressure leaching, iron-aluminum removal and nickel-cobalt-manganese precipitation treatment on laterite nickel ore to obtain an underflow containing nickel-cobalt-manganese hydroxide, wherein the pH value of the underflow is 7-8; S 2 , performing oxygen-pressure leaching on the low nickel matte using sulfuric acid and oxygen to obtain a leached slurry containing residual acid, adding the underflow into the leached slurry to obtain a mixed slurry, and adjusting the pH value of the mixed slurry to be 3-5 using the underflow; and S 3 , performing filter pressing on the mixed slurry to obtain filtrate and tailings, and performing nickel-cobalt-manganese co-extraction, concentration and crystallization on the filtrate to obtain the nickel-cobalt-manganese sulfate crystals. The method has the advantages of high utilization rate of nickel, cobalt and manganese, few impurities, reduced reagent consumption and technological processes, and high transportation efficiency.

Provided are a cathode material for sodium-ion batteries, a preparation method therefor, and an application thereof, and the preparation method comprises the following steps: (1) mixing a nickel source, a manganese source, and a magnesium source to obtain a ternary salt solution, adding the ternary salt solution, a precipitating agent, a complexing agent, a boron source solution, and an organic additive to a reaction vessel in parallel flow, and performing a reaction to obtain a B-doped radially-packed hydroxide precursor; and (2) mixing the B-doped radially-packed hydroxide precursor obtained in step (1) with a sodium source, and performing sintering treatment to obtain the cathode material for sodium-ion batteries. In the present application, the chemical composition (B-doping) and microscopic morphology (radial-packed arrangement of primary particles) of the cathode material are synergistically modified and regulated by optimizing the co-precipitation process, so as to improve the element distribution uniformity, structure stability, cycle performance, rate capability, and production efficiency of the cathode material for sodium-ion batteries simultaneously.

The disclosure discloses a method for preparing a battery-grade nickel-cobalt-manganese sulfate solution from low nickel matte. The method includes the following steps: grinding low nickel matte, then adding the ground low nickel matte to concentrated sulfuric acid, and carrying out atmospheric pressure leaching to obtain a first slag phase and a first liquid phase; carrying out evaporation concentration-cooling crystallization on the first liquid phase to obtain ferrous sulfate crystals; adding concentrated sulfuric acid to the first slag phase, and carrying out oxygen pressure leaching to obtain a second slag phase and a second liquid phase; adjusting pH of the second liquid phase to 3-4 to generate a precipitate, and removing the precipitate by filtration to obtain a filtrate; carrying out adsorption treatment on the filtrate by adopting chelating resin; washing the adsorbed chelating resin with a first sulfuric acid solution to obtain a washing solution containing Mg and Mn, and then washing the chelating resin with a second sulfuric acid solution to obtain a nickel-cobalt sulfate solution; and mixing the nickel-cobalt sulfate solution with the washing solution containing Mg and Mn to obtain the nickel-cobalt-manganese sulfate solution. According to the method of the disclosure, the battery-grade nickel-cobalt sulfate solution is prepared from the low nickel matte as a raw material, so that the recovery rate of nickel and cobalt is increased, and the acid consumption is reduced.

A treatment method and application for laterite nickel ore leaching solution with high calcium and magnesium content, comprising the following steps: S1. preparing an extracted organic phase from the 2-hexyldecanoic acid and the HBL110/HBL116 extractant; S2. performing nickel-cobalt co-extraction on the extracted organic phase and a laterite nickel ore leaching solution with a high calcium and magnesium content to obtain a first loaded organic phase and a raffinate; in a laterite nickel ore leaching solution with a high calcium and magnesium content; S3. washing the first loaded organic phase with a washing solution to obtain a second loaded organic phase and washing water, wherein the washing water is refluxed to a laterite nickel ore leaching solution with high calcium and magnesium content; S4. adding a reverse extracting solution to the second loaded organic phase for reverse extracting to obtain a nickel-cobalt salt solution and a reverse extracted organic phase; S5. saponifying the reverse extracted organic phase to obtain a regenerated extracted organic phase; this scheme is applicable to the environment with high calcium and magnesium, can prevent calcium and magnesium from forming a third phase, and the effect of separating and purifying nickel and cobalt is good.

A method for dynamically controlling high-pressure leaching reaction condition of laterite nickel ore includes: setting a target temperature and a target pressure of an high-pressure reactor; obtaining the heat power required for heating the feeding pulp to the target temperature; obtaining the heat power brought by the acid; obtaining the required new steam thermal power; obtaining the required new steam flow; adjusting the real-time flow of the new steam to the required flow of the new steam, and adjusting the exhaust valve opening degree and discharge flow rate of the high-pressure reactor to make the real-time pressure of the high-pressure reactor equal to the target pressure, and adjusting the flow rate of the new steam to make the real-time temperature of the high-pressure reactor equal to the target temperature.

The disclosure discloses a method for preparing battery-grade nickel-cobalt-manganese sulfate crystals from low nickel matte, which includes the following steps: S 1 , sequentially performing high-pressure leaching, iron-aluminum removal and nickel-cobalt-manganese precipitation treatment on laterite nickel ore to obtain an underflow containing nickel-cobalt-manganese hydroxide, wherein the pH value of the underflow is 7-8; S 2 , performing oxygen-pressure leaching on the low nickel matte using sulfuric acid and oxygen to obtain a leached slurry containing residual acid, adding the underflow into the leached slurry to obtain a mixed slurry, and adjusting the pH value of the mixed slurry to be 3-5 using the underflow; and S 3 , performing filter pressing on the mixed slurry to obtain filtrate and tailings, and performing nickel-cobalt-manganese co-extraction, concentration and crystallization on the filtrate to obtain the nickel-cobalt-manganese sulfate crystals. The method has the advantages of high utilization rate of nickel, cobalt and manganese, few impurities, reduced reagent consumption and technological processes, and high transportation efficiency.

The disclosure discloses a method for preparing a battery-grade nickel-cobalt-manganese sulfate solution from low nickel matte. The method includes the following steps: grinding low nickel matte, then adding the ground low nickel matte to concentrated sulfuric acid, and carrying out atmospheric pressure leaching to obtain a first slag phase and a first liquid phase; carrying out evaporation concentration-cooling crystallization on the first liquid phase to obtain ferrous sulfate crystals; adding concentrated sulfuric acid to the first slag phase, and carrying out oxygen pressure leaching to obtain a second slag phase and a second liquid phase; adjusting pH of the second liquid phase to 3-4 to generate a precipitate, and removing the precipitate by filtration to obtain a filtrate; carrying out adsorption treatment on the filtrate by adopting chelating resin; washing the adsorbed chelating resin with a first sulfuric acid solution to obtain a washing solution containing Mg and Mn, and then washing the chelating resin with a second sulfuric acid solution to obtain a nickel-cobalt sulfate solution; and mixing the nickel-cobalt sulfate solution with the washing solution containing Mg and Mn to obtain the nickel-cobalt-manganese sulfate solution. According to the method of the disclosure, the battery-grade nickel-cobalt sulfate solution is prepared from the low nickel matte as a raw material, so that the recovery rate of nickel and cobalt is increased, and the acid consumption is reduced.

Disclosed in the present disclosure are a positive electrode material precursor and a positive electrode material and preparation methods therefor, and a sodium-ion battery. The positive electrode material precursor comprises an inner core and a shell wrapping the periphery of the inner core, wherein the inner core is Ni x Fe y Mn 1-x-y (OH) 2 , where 0.2≤x≤0.7, and 0.2≤y≤0.5; the shell is M a Mn 1-a (OH) 2 , where M is nickel or iron, and 0.05≤a≤0.7; and both the inner core and the shell are formed by stacking flaky primary particles. In the positive electrode material precursor provided in the present application, by controlling the components of the inner core and the shell and using a loose structure thereof formed by stacking flaky primary particles in combination, a heterostructure positive electrode material with an 03-phase inner core and a P2-phase shell can be obtained; and due to the synergistic effect of the two-phase structure, the heterostructure positive electrode material has both high capacity and high cycle stability, such that the electrochemical performance of a sodium-ion battery can be further improved. In addition, the preparation method for a positive electrode material provided in the present application is simple, has a relatively low cost, and is suitable for industrial large-scale production.