A rapid leaching method of impermeable weathering crust leaching type rare earth ore

Abstract

The invention relates to a rapid leaching method for weathered crust strain amass-type rare earth ore in which seepage is difficult. The method comprises the following steps that firstly, water is directly injected into the rare earth ore in which seepage is difficult; secondly, a leaching agent solution is injected into the rare earth ore in which seepage is difficult, and the liquid level difference of water and the leaching agent solution is kept to range from 5 cm to 30 cm; and thirdly, rare earth leachate is collected, and rare earth is then extracted from the leachate. A new liquid injection technology is provided for the rare earth ore in which seepage is difficult, tap water is injected in the first step, then the leaching agent is injected, and the leaching cost is reduced; and compared with a traditional rare earth liquid injection technology, the leaching rare earth production period can be effectively shortened, the leaching rate of the rare earth leachate is increased by 2-8 times, and the rare earth extraction rate is increased and reaches 85%-98%.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a rapid leaching method of impermeable weathering crust leaching type rare earth ore. Background technique [0002] Weathering crust elution-type rare earth ore is an important mineral resource rich in medium and heavy rare earth elements, widely distributed in seven southern provinces of my country, including Jiangxi, Fujian, Guangdong, Hunan, Yunnan, Guangxi and Zhejiang. The weathering crust leaching type rare earth ore is formed by the weathering of the original rock containing rare earth through biological, chemical and physical effects. Rare earth elements are adsorbed on clay minerals in the form of rare earth hydrated ions or hydroxyl hydrated ions. In industry, the solution leaching method is usually adopted, and the rare earth ions are replaced in the rare earth leaching solution by ion exchange method to obtain a rare earth leachate, and then the rare earth is e...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rapid leaching method for impermeable weathering crust leaching type rare earth ore in view of the above-mentioned deficiencies in the prior art. By using this method, the leaching speed of the rare earth leach solution is doubled, and the rare earth leaching efficiency is high. It can effectively solve the problems of long extraction period and low production efficiency of impermeable weathering crust leaching type rare earth ore in actual production