A method for separating valuable elements from carbonate clay-type lithium ore

Abstract

The present invention discloses a method for separating valuable elements from carbonate clay-type lithium ore, wherein the valuable elements include lithium, aluminum and silicon, and the method comprises: mixing carbonate clay-type lithium ore powder with auxiliary materials to obtain a mixture; wherein the auxiliary materials are one of alkali and carbonate or a mixture of the two; roasting the mixture to obtain a roasted material; mixing the roasted material with water to obtain a slurry; performing solid-liquid separation on the slurry to obtain an aluminum-containing solution and a filter cake; washing the filter cake to pH=7~11 and then adding it to an acidic solution, mixing evenly, standing to obtain a colloidal substance; roasting and leaching the colloidal substance in sequence, wherein the solid after leaching is a silicon-containing substance, and the leaching liquid is a lithium-containing solution. The method of the present invention realizes the effective separation of lithium, aluminum and silicon in carbonate clay-type lithium ore, has a large processing capacity, a simple process, is easy to control, has a low cost, and has significant economic benefits.

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