海盐场卤水中锂资源状况和产业前景初步探讨  

OUTLOOK FOR LITHIUM RESOURCE IN SEA SALT FIELDS

作　　者：李效广[1] 后立胜[1] 李志丹[1] 金若时[1] 冉书明[1] 曾江萍[1] 张楠[1] 

机构地区：[1]中国地质调查局天津地质调查中心非化石能源矿产实验室,天津300170

出　　处：《资源与产业》2016年第2期48-52,共5页Resources & Industries

基　　金：中国地质调查项目(12120113057300);国家自然科学基金项目(41502082);国家重点基础研究发展计划项目(2015CB453002)

摘　　要：优选渤海湾地区的2个大型海盐生产企业,针对制盐的各工艺流程中Li的含量变化进行研究。研究结果表明:在制盐工艺中,从海水至老卤锂明显逐步浓缩,2个盐场老卤中Li Cl浓度分别为97.27 mg/L和138.15 mg/L,接近卤水锂矿边界品位;海水盐化工生产过程中盐类结晶对Li+的吸附效应不明显。根据我国海盐产量与渤海湾地区的采样数据推算,2013年全国海水盐场全年生产的老卤中锂金属量为455.95 t,折合成碳酸锂当量为2 430.23 t。由此可见,海盐场年处理海水中锂含量较高,另外含锂的苦卤老卤较易集中,单一提锂工艺具有通用性,因此我国海盐场卤水中锂资源的提取前景广阔。另外,直接从海水中提锂工艺也应是今后的主攻方向,一旦突破技术成本,直接从海水提锂产业化前景无限。This paper selects two large sea salt producers in Bo Sea bay to study the Li content changes in their salt making processes with results showing that Li is enriching from sea water to final brine. Li Cl becomes 97. 27 mg / L and138. 15 mg / L in final brines in these two fields,reaching the cut-off grade of the brine Li. During producing sea salt,the crystallization of salts has a low absorption to Li ＋. According to China＇s sea salt production and Bo Sea Bay sampling data,Li metal is estimated to be 455. 95 t in final brines of China＇s all sea salt fields in 2013,equivalent to2430. 23 t in Lithium Carbonate. Li content is high sea water in sea salt fields and tends to be concentrating in the final brine. Extracting Li technology is universal,which provides a prosperous outlook in extracting Li from sea salt field＇s brines. Extracting Li directly from sea water,if matures,is the future technology.

关 键 词：锂资源 卤水 海水提锂 海盐场 

分 类 号：F426.7[经济管理—产业经济]