Rare earth mining method for obtaining high-concentration leachate based on in-situ ore leaching process

• Main Authors: LIU MAOQIU, YUAN CHANGLIN, LAI YAN, ZHU XIAOCHUN, XIAO TENGLONG, XIE FANGFANG, WU DI, WANG LINSHENG, HUANG ZIBIN, ZHU ZHICHENG, WEN YAFANG, LI GANG, LIANG JIAN
• Format: Patent
• Language: Chinese; English
• Published: 20.11.2020
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a rare earth mining method for obtaining high-concentration leachate based on an in-situ ore leaching process. The rare earth mining method comprises the following steps of taking ammonium sulfate reagent as an ore leaching agent; vibrating and compacting an in-situ ore bed by adopting a vibrating and compacting tool; injecting the ore leaching agent into the ore bed; collecting leachate, wherein the concentration of the ore leaching agent in the step 1) is 2%-4%; and in the step 2), the permeability of the in-situ ore layer after being vibrated and compacted is controlled within the range of 200 md-800 md; and 3) the strength of the ore leaching agent injected into the in-situ ore bed is 1/5-1/3 of the thickness of the ore bed. It is found through experiments thatthe concentration of the leachate is quite ideal, the power cost is low, and the purposes of the high recovery rate of ionic rare earth resources and the low production cost are achieved. 本发明涉及一种基于原地浸矿工艺获得高浓度浸出液的稀土开采方法，包括以下步