System for preparing new energy Ni—Co—Mn raw material from laterite nickel ore

A system for preparing Ni-Co-Mn raw material from laterite nickel ore, comprising:

• a raw auxiliary material supply module, comprising an ore blending unit, an ore washing unit, an ore dressing unit, an ore grinding unit, and a concentration unit connected in series, and further comprising a neutralizer preparation unit, an acid preparation unit, and a precipitation accelerator preparation unit, wherein the ore blending unit is configured to blend an ore of a required grade, the ore washing unit is configured to wash the ore, the ore dressing unit is configured to separate chromium iron oxide from the ore, the grinding unit is configured to grind the ore into a required particle size to obtain a pulp, and the concentration unit is configured to concentrate the pulp;
• a leaching reaction module, comprising a multi-level preheating unit, a high-pressure/oxygen-pressure reactor unit, and a multi-level flash distillation unit connected in series, wherein the multi-level preheating unit is connected to the concentration unit and configured to perform a multi-level preheating on the pulp, the high-pressure/oxygen-pressure reactor unit is further connected to the acid preparation unit and configured to leach minerals in the pulp, and the multi-level flash distillation unit is configured to perform a multi-level pressure and temperature lowering on leach solution;
• a neutralization and purification module, comprising a cyclic leaching pulp neutralization unit, a multi-stage countercurrent washing unit and a multi-segment Fe-Cr-Al removing unit, wherein the cyclic leaching pulp neutralization unit is connected to the multi-stage flash distillation unit and the neutralizer preparation unit, and is configured to neutralize the leach solution of the multi-stage flash distillation unit;
• the multi-stage countercurrent washing unit is connected to the cyclic leaching pulp neutralization unit, and is configured to wash the neutralized leach solution;
• and the multi-segment Fe-Cr-Al removing unit is connected to the multi-stage countercurrent washing unit, the cyclic leaching pulp neutralization unit, and the neutralizer preparation unit, and is configured to remove impurities from the washed leach solution, and transport slag phase generated during removing the impurities into the multi-stage countercurrent washing unit and the cyclic leaching pulp neutralization unit;
• a Ni—Co—Mn mixed hydroxide synthesis module, comprising a Ni—Co—Mn mixed hydroxide multi-stage synthesis unit and a Ni—Co—Mn mixed hydroxide product packaging unit, wherein the Ni—Co—Mn mixed hydroxide multi-stage synthesis unit is connected to the multi-segment Fe—Cr—Al removing unit and the neutralizer preparation unit, and is configured to precipitate nickel, cobalt, and manganese from the leach solution that has been purified by the multi-segment Fe—Cr—Al removing unit;
• the Ni—Co—Mn mixed hydroxide product packaging unit is connected to the Ni—Co—Mn mixed hydroxide multi-stage synthesis unit, and is configured to package the precipitate;
• and
• a valuable metal recovery module, comprising a manganese, copper, zinc, and scandium recovery unit, and the manganese, copper, zinc, and scandium recovery unit is connected to the multi-segment Fe—Cr—Al removing unit and the Ni—Co—Mn mixed hydroxide multi-stage synthesis unit, and configured to recover valuable metals comprising manganese, copper, zinc, and scandium;
• a crystal manufacturing module, comprising a Ni—Co—Mn mixed salt crystal manufacturing unit, a nickel-salt crystal manufacturing unit, a cobalt-salt crystal manufacturing unit, and a manganese-salt crystal manufacturing unit, wherein the Ni—Co—Mn mixed salt crystal manufacturing unit is connected to the multi-segment Fe—Cr—Al removing unit and the Ni—Co—Mn mixed hydroxide multi-stage synthesis unit, and is configured to extract liquid phase to obtain a Ni—Co—Mn mixed salt crystal, wherein the nickel-salt crystal manufacturing unit, the cobalt-salt crystal manufacturing unit, and the manganese-salt crystal manufacturing unit are connected to the multi-segment Fe—Cr—Al removing unit and the Ni—Co—Mn mixed hydroxide multi-stage synthesis unit, and are configured to extract the liquid phase to obtain a nickel-salt crystal, a cobalt-salt crystal, and a manganese-salt crystal;
• a ternary precursor manufacturing module, comprising a material preparation unit, a control precipitation reaction unit, and a ternary precursor post-processing unit connected in series, wherein the material preparation unit is connected to the Ni—Co—Mn mixed salt crystal manufacturing unit, the nickel-salt crystal manufacturing unit, the cobalt-salt crystal manufacturing unit, and the manganese-salt crystal manufacturing unit, and is configured to prepare a metal salt solution, an alkali liquid, and a complexing agent, the control precipitation reaction unit is configured to control the metal salt solution, the alkali liquid, and the complexing agent to react together and form a reacted material, and the ternary precursor post-processing unit is configured to process the reacted material to obtain a ternary precursor product;
• and
• a ternary positive material preparation module, comprising a lithium mixed charging unit, a high-temperature synthesis unit, and a ternary positive material post-processing unit connected in series, wherein the lithium mixed charging unit is connected to the ternary precursor post-processing unit, and is configured to mix the ternary precursor product with lithium source, the high-temperature synthesis unit is configured to perform a high-temperature synthesis on the mixed material, and the ternary positive material post-processing unit is configured to crush the material obtained after high-temperature synthesis and remove magnetic foreign material from the crushed material.