Rare rare-earth mine rehabilitation method

• Main Authors: JI JUN, ZHU JIAMING, TAO ZHIHUI, ZHANG YINCHENG, GAO YAJUAN, HE JIANLONG, ZHANG SHOUBING, HAN FENG, MA JUNJUN, XIE WENYU, WU CHUANBAO, SHENTU LINGNU, ZHU BOSONG, HAN ZHENGCHANG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a rare rare-earth mine rehabilitation method. The method comprises the following steps that 1, rare earth tailings are subjected to ball milling and screening to obtain tailing raw powder; 2, the tailing raw powder is soaked in an acid solution for acid dissolution; 3, filtering is conducted after acid dissolution, so that the tailing powder is separated from filtrate; 4, the separated tailing powder is washed with water, the washed tailing powder is added into quick lime, and the PH is regulated to be 6-8; 5, a rehabilitation agent is added into the tailing powder of which the PH value is regulated, the materials are stirred to be uniform and then stacked in a room for 3 days to 10 days, and rehabilitated ore soil is obtained; 6, a mining area and a subsidence area are filled with the rehabilitated ore soil obtained in the step 5. According to the rare rare-earth mine rehabilitation method, secondary utilization of resources is achieved, the tailing-free, harmless, hazard-free, safe an