Status and Trends of Direct Lithium Extraction Technology

Junho Shin; Jae-Min Jeong; Jungho Ryu; Jun-Hwan Bang; Sun Kyung Kim; Taegong Ryu

doi:10.32390/ksmer.2023.60.5.326

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2023 Vol.60, Issue 5S Preview Page Next Page

Review (Special Issue)

Status and Trends of Direct Lithium Extraction Technology DLE(Direct Li Extraction) 기술 및 동향

31 October 2023. pp. 326-340

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Abstract

The commercial supply of lithium has recently reached its limit, prompting active research into the recovery of lithium from low-grade brines, such as geothermal water and oil field brine, which contain lithium. The commercialized process that relies on natural evaporation and concentration, typically applied to high-grade brine, has limitations when applied to low-grade brine. As an alternative, direct lithium extraction (DLE) technology is being proposed. DLE technology employs non-evaporative lithium extraction methods, including precipitation, solvent extraction, and adsorption, to recover lithium from low-grade brines (with lithium concentrations less than 1000 ppm). This technology is gaining importance, because it can overcome the drawbacks of conventional methods, such as lengthy processing time and production limits. This paper discusses the development direction of DLE technology that can ensure environmental and economic feasibility, using an analysis of the current status and trends of lithium recovery technology.

Keywords

lithium compounds

recovery

brine

DLE

현재 상업적으로 회수되고 있는 리튬 공급량은 이미 한계에 도달하였고 이를 극복하기 위해 지열수, 유전염호 등과 같은 리튬을 함유한 저농도 염호로부터 리튬을 회수하는 연구가 활발히 진행되고 있다. 고품위 염호를 대상으로 적용되는 자연증발/농축 기반의 상용화 공정의 경우 저농도 염호에 적용하기에는 한계를 지녀, 이를 대체할 수 있는 DLE(Direct Li Extraction) 기술이 제시되고 있다. DLE 기술은 저품위 염호( Li conc.<1000 ppm)으로부터 리튬을 회수할 수 있는 침전법, 용매추출법, 흡착법 등과 같은 비증발 리튬추출기술을 적용해 리튬을 회수하는 방법으로 기존 자연증발농축법의 단점인 긴 공정시간, 생산량 한계를 극복할 수 있는 기술로써 중요성이 확대되고 있다. 본 논문에서는 리튬회수기술 현황 및 최근 활발히 진행되고 있는 DLE 기술 개발 동향분석을 통해 환경성/경제성을 확보할 수 있는 DLE 기술 개발 방향성을 제시하고자 한다.

키워드

리튬화합물

회수

염호

직접리튬추출

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 60
No :5
Pages :326-340
Received Date : 2023-09-13
Revised Date : 2023-10-17
Accepted Date : 2023-10-26
DOI :https://doi.org/10.32390/ksmer.2023.60.5.326

Journal of the Korean Society of Mineral and Energy Resources Engineers 한국자원공학회지 ISSN:2288-0291(Print) 2288-2790(Online)

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