Extraction of Nickel and Cobalt from Laterite Nickel Ore Leachate

With the rise of the new energy vehicle industry, the trend towards high-nickel batteries has become widely accepted, leading to a continuous increase in the demand for nickel. This has made nickel one of the most sought-after metals by capital and industry in recent years.

Laterite nickel ore is highly valued in the industry due to its abundant resources, low exploration and mining costs, mature pyrometallurgical processes, increasingly mature hydrometallurgical production technologies, and the convenience of coastal mines for transportation.

The high-pressure acid leaching process involves reacting the ore slurry with sulfuric acid under high temperature and pressure. Valuable metals such as nickel and cobalt, along with impurities like iron, silicon, and aluminum, dissolve together. Subsequently, the impurities (iron, silicon, aluminum) hydrolyze and enter the slag, achieving the selective leaching of nickel and cobalt.

After leaching, the slurry undergoes neutralization, washing, impurity removal, and precipitation to produce high-quality nickel-cobalt sulfide or nickel-cobalt hydroxide intermediates. These intermediates then enter the traditional refining process to produce the final product.

Haipu has developed a nickel extraction resin suitable for processing eluates containing nickel and cobalt that have been desorbed from the resin. This allows for the extraction of nickel and cobalt from the product slurry of the laterite acid leaching process, using the resin-in-pulp method.

Extraction of Nickel and Cobalt from Laterite Nickel Ore Leachate

During use, nickel and cobalt are extracted from the acidic sulfate leach solution onto the Haipu nickel extraction resin through ion exchange. The metals are then desorbed from the resin using acid, followed by solvent extraction to separate them. This enables the production of high-purity nickel and cobalt through electrolysis.

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