FEASIBILITY ANALYSIS AND MINING SUGGESTION OF IN-SITU LEACHING TECHNOLOGY FOR SEDIMENTARY BAUXITE

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.