Leaching process for nickel-containing eluvial ores

The invention provides a leaching process for nickel-containing eluvial ores. The process comprises the following steps of: dividing the nickel containing eluvial ores into high-iron eluvial ores and high-magnesium eluvial ores; performing acid leaching of the high-iron eluvial ores to obtain leaching liquor of the high-iron eluvial ores; adding a jarosite precipitation agent into the leaching liquor of the high-iron eluvial ores, adding the high-magnesium eluvial ores into the leaching liquor of the high-iron eluvial ores for acid leaching so as to make ferric iron precipitated in form of iron alum and obtain the leaching liquor of the high-magnesium eluvial ores; adding an oxidant to the leaching liquor of the high-magnesium eluvial ores so as to convert a small amount of ferrous iron into ferric iron, and adding limestone so as to precipitate the ferric iron; and performing solid-liquid separation of the leaching liquor, obtained after precipitation, of the high-magnesium eluvial ores to obtain leaching sl