Lithium extraction method for reducing solution loss of titanium adsorbent through continuous ion exchange

• Main Authors: ZHANG KELUN, CHEN XUEXIN, XU XIAOYANG, GAO JIANNENG, WANG BINGHUANG, XIE HONGZHEN, WANG QIANKUN, JI CHANGQING, LEI FOGUANG, LI JIANCHANG, XU FANG
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a lithium extraction method for reducing the solution loss of a titanium adsorbent through continuous ion exchange, lithium extraction is carried out by adopting a continuous ion exchange mode, in the desorption process of the titanium adsorbent, a multi-stage segmented low-acid desorption mode is adopted, the low H < + > concentration in a column is maintained, desorption is guaranteed, and meanwhile the solution loss of the adsorbent is reduced; liCl solution leaching or dilute acid impurity removal is combined with an adsorption washing procedure before desorption, so that the impurity content in qualified liquid can be effectively reduced, the water consumption is reduced, and the production efficiency is improved. 本发明公开了一种连续离交降低钛系吸附剂溶损的提锂方法，采用连续离交方式进行提锂，在钛系吸附剂解吸过程中，采用多级分段低酸解吸方式，并维持柱内较低H+浓度，保障解吸的同时，降低吸附剂的溶损；解吸前采用LiCl溶液淋洗或稀酸脱杂与吸附洗涤工序结合，可有效降低合格液中杂质含量，减少水用量，提高生产效率。