## 1 Introduction  
With rapid development in the field of new energy vehicles, the requirement for lithium-ion-powered batteries, which serve as their primary power source, has significantly arisen, resulting in a surge in demand for lithium and its compounds in the markets [1]. Traditional lithium resources, such as lithium pyroxene and low-magnesium brines, can no longer meet the markets' demands. The lithium mica mineral associated with the Yichun tantalum-niobium minerals is the world's largest lithium mica mineral resource, and is an important lithium resource production base in China [2, 3, 4]. Lithium mica slag is a byproduct of the extraction of lithium and its compounds from lithium mica minerals. [PERSON] et al. [5] pointed out that the contents of SiO\({}_{2}\) and Al\({}_{2}\)O\({}_{3}\) in lithium mica slag reach 70%, and a certain amount of alkali and sulfur residues is also present in lithium mica slag, which, in open piles and landfills, will threaten the safety of the surrounding environment and groundwater resources. Therefore, the thorough and effective utilization of lithium mica slag has emerged as a topic of extensive research. [PERSON] et al. [6] conducted a study indicating that lithium mica slag contains considerable quantities of reactive SiO\({}_{2}\) and Al\({}_{2}\)O\({}_{3}\), which can serve as useful auxiliary cementitious materials. [PERSON] et al. [7] concluded that lithium mica slag has high contents of SiO\({}_{2}\) and Al\({}_{2}\)O\({}_{3}\), which can be used as a cement admixture, with a high activity index observed when using a 30% lithium mica slag admixture. [PERSON] et al. [8] concluded that lithium mica slag bears a resemblance to clay, both in terms of its composition and as a high-quality aluminosilicate mineral material. [PERSON] et al. [9] investigated the impact of varying quantities of lithium mica slag on cement composite qualities and concluded that it is possible to replace fly ash with lithium mica slag in cementitious composite formulations. [PERSON] [10] determined that lithium mica slag, when used as a cement admixture, can undergo a secondary hydration reaction with Ca(OH)\({}_{2}\), a cement hydration product. This process generates substantial C-S-H, thereby enhancing the mechanical properties of the cement. [PERSON] [11] found that, compared to cement without lithium mica slag, a 10% addition of lithium mica slag to cement exhibited the highest compressive strength of 48.2 MPa following a maintenance period of 28 days. [PERSON] et al. [12] found that wet-milled micron-sized lithium mica slag can increase the early strength of silicate cement by almost three times compared to traditional methods. [PERSON] et al. [13] ascertained that incorporating lithium mica slag in cement paste led to a substantial increase in its mechanical strength, durability, and fluidity compared to other admixtures, similarly to fly ash and steel slag. The prominent crystalline phase in lithium mica slag is square zeolite [14,15]. Square zeolite can form a new cement paste through a secondary hydration reaction with the cement hydration product Ca(OH)\({}_{2}\) during cement hydration. This process can enhance the structure and durability performance of cement materials. The use of lithium mica slag as an admixture for the partial replacement of cement is the primary method for the widespread application of lithium mica slag. The main extraction methods for lithium mica slag from lithium mica minerals, depending on the extraction medium, include acid leaching, alkali leaching, salt roasting, high-temperature chlorination, etc. [5,16,17,18,19,20]. Among them, the sulfate method is one of the frequently utilized methods for extracting lithium from lithium mica minerals.