文章信息/Info

Title:

Analysis and Exploration of the Process for Preparing Lithium Hydroxide Monohydrate from Recycled Lithium Carbonate from Batteries

文章編號:

1674—3962 (2018)01-0000-00

作者:

夏星; 王奉剛; 陳堅; 謝美求

長沙礦冶研究院有限責任公司，湖南 長沙 410012

Author(s):

XIA Xing; WANG FengGang; CHEN Jian; XIE Meiqiu

Changsha Research Institute of Mining and Metallurgy co.,ltd， Hu nan 410012， China

關鍵詞:

廢舊鋰離子電池; 電池回收; 碳酸鋰; 單水氫氧化鋰; 制備工藝

Keywords:

Discarded lithium-ion batteries;  battery recycling;  lithium carbonate; monohydrate lithium hydroxide;  preparation process

分類號:

TF803;TQ09

DOI:

10.7502/j.issn.1674-3962.202308033

文獻標志碼:

A

摘要:

鋰元素的回收是電池回收工藝中的關鍵步驟，目前一般采用濕法浸出技術將有價元素從鋰電池黑粉中轉移到溶液中，然后經過除雜凈化得到精制的硫酸鋰溶液，加入碳酸鈉制備成工業級碳酸鋰或者碳酸鋰粗品，再經精制除雜得到碳酸鋰產品返回電池生產過程。隨著氫氧化鋰市場需求的提高，如何將碳酸鋰經濟高效地轉化為氫氧化鋰也成為重要環節。針對電池回收產生的工業級碳酸鋰轉化為氫氧化鋰的工藝過程，詳細分析了不同工藝路線的原料選擇、工藝過程、產品及副產品產出以及能源消耗等關鍵因素，通過對比不同工藝路線的優劣勢，總結出不同企業狀態適用的工藝路線，旨在為優化生產流程、提高回收產業鏈附加值提供有價值的參考。研究結果將有助于指導電池回收企業在選擇氫氧化鋰生產工藝時作出決策，同時也為鹽湖提鋰和礦石提鋰產生的碳酸鋰生產氫氧化鋰提供借鑒。

Abstract:

The recovery of lithium is a crucial step in battery recycling. Currently, wet leaching technology is commonly employed to extract valuable elements from the black powder. This process involves impurity removal and purification, resulting in a refined lithium sulfate solution. Carbonic acid is subsequently added. Sodium is used to produce either industrial-grade lithium carbonate or crude lithium carbonate. The resulting lithium carbonate undergoes further refinement to remove impurities, creating a product suitable for battery production. Given the growing demand in the lithium hydroxide market, the cost-effective and efficient conversion of lithium carbonate to lithium hydroxide has become increasingly important. This study centers on the conversion process, transforming lithium carbonate obtained from battery recycling into lithium hydroxide. The analysis covers critical factors, including raw material selection, process routes, product and byproduct yields, and energy consumption across various process options. Through a comparison of advantages and disadvantages, suitable process routes for different company states were summarized, aims to offer valuable insights for optimizing production and adding value to the recycling industry chain. This study can serve as guidance for battery recycling companies when choosing lithium hydroxide production methods. Furthermore, it serves as a reference for producing lithium hydroxide from lithium carbonate obtained via extraction from salt lakes and ores.