Formate compound extracting agent for weathering crust elution-deposited rare earth ore

Abstract

The invention discloses a formate compound extracting agent for weathering crust elution-deposited rare earth ore. The formate compound extracting agent contains formate solution and ammonium salt solution. Compared with the extracting effect of a traditional extracting agent, the formate compound extracting agent is capable of accelerating a seepage velocity of the extracting agent in an ore body, effectively shortening extraction time of rare earth in the preconditions without affecting a rare earth extracting rate, and effectively inhibiting the extracting of impurity aluminum, beneficial to follow-up impurity-removing working procedures of rare earth mother liquor, and capable of realizing the efficient low-impurity extracting of the weathering crust elution-deposited rare earth ore. The formate compound extracting agent is non-toxic in formate raw material, less in addition amount, low in cost, biodegradable, green and environment-friendly.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a formate composite leaching agent for weathering crust leaching type rare earth ores. Background technique [0002] The weathering crust elution-type rare earth ore is rich in medium and heavy rare earths with high commercial value, and has great economic and strategic value. The mining of this mine has been highly valued at home and abroad. Weathering crust leaching type rare earth ores are composed of rare earth-containing granite and volcanic rocks, which are weathered to form kaolinite, halloysite, montmorillonite and illite through biological, chemical and physical actions in a warm and humid climate. At the same time, the easily weathered rare earth minerals in the original rock are weathered and dissociated to form rare earth hydrated ions or hydroxyl hydrated ions adsorbed on the clay minerals, forming a weathered crust leaching type rare earth ore. In industr...

AI Technical Summary

Problems solved by technology

The accompanying impurity metal aluminum ions in the leaching solution will increase the cost of impurity removal, directly affect the subsequent precipitation recovery process of rare earth, and reduce the quality of rare earth products