FEASIBILITY ANALYSIS AND MINING SUGGESTION OF IN-SITU LEACHING TECHNOLOGY FOR SEDIMENTARY BAUXITE
ZHANG Yi1,3,4, LI Zhi-zhong1,2, LUO Teng-yue1,4, TANG Xiao-jun1,5, MU Hua-yi1,2, GUO Ke6, SUN Ping-ping1,2, WANG Xin1,2
1. Green Development Institute of Western China, CGS, Xi'an 710054, China; 2. Xi'an Center of China Geological Survey, Xi'an 710054, China; 3. College of Earth Sciences, Jilin University, Changchun 130061, China; 4. Institute of Yanchang Petroleum (Group) Co., Ltd., Xi'an 710065, China; 5. School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 6. Institute of Digital Hu Line, Chengdu University of Technology, Chengdu 610059, China
Abstract：Sedimentary bauxite is the main type of the deposits in China. The reserve-production ratio has gradually declined with decades of development, thus green exploitation of difficult-to-use resources in the deep is a matter of great urgency. Through static leaching test and electrode heating simulation, combined with the successful experience of in-situ leaching technology in uranium and rare earth mining, the application conditions of the technology in solid mineral mining are summarized as follows:1) soluble minerals, 2) stable orebody distribution, 3) roof and floor conditions and 4) orebody permeability. The bauxite resources in North China fit in well with the above conditions and are suitable for in-situ leaching technology. The technological scheme for in-situ leaching mining of sedimentary bauxite is also proposed, which provides idea for pilot test design in the next step.
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