(735t) Optimizing Lithium Carbonate Crystallization Via a Novel Sieve Technology

Despite its historical significance as a method for separation and purification, crystallization is still a challenging process to optimize. Given that crystallization is a pivotal technique in mineral extraction from effluent; and lithium salts, such as lithium carbonate, stand out as key components extractable from rejected water in desalination plants, this study centers on optimizing crystallization for lithium carbonate using innovative sieve plates. This approach underscores the process's efficiency and its crucial role in sustainable water management and mineral recovery. This ongoing research involves the design and evaluation of a novel sieve plate for the crystallization of Lithium Carbonate in two distinct setups: a single-unit Li₂CO₃ solution and a multi-stage unit flow-through crystallizer. However, the focus of this study is on the behavior of a single-unit crystallizer. The study examines how the extent of sieve plate coverage and surface texture can influence the yield and granularity of the Lithium salt crystals in a single unit, and examines the impact of sieve plate exposure to several different solution-air interfaces.

We anticipate the use of sieve plates with about 60% coverage and enhanced exposure to solution-air interfaces will lead to improved salt yields. Additionally, we explore innovative alternative materials for the construction of sieve plates that could favorably influence nucleation rates and crystal growth.

By diving deeper into the geometry and surface roughness of the sieve plates, we explore variations in pore size, shape, and distribution. We submit that the geometry can significantly impact the fluid dynamics around the crystals, potentially leading to a more uniform crystal size and faster growth rate. Furthermore, we investigate the effects of enhanced system control including temperature, optimum flow rate, supersaturation levels, and solution purity to determine if a more precise controlled environment can lead to enhanced reproducibility and optimization of crystal size and quality. It is further anticipated that alternative approaches, such as pulsating flows or varying flow patterns could reveal new dynamics in crystal growth.