Aluminum fluoride (AlF3) is an essential industrial material widely used in aluminum electrolysis and ceramics, yet its performance depends critically on the powder properties of its precursor, aluminum fluoride trihydrate (AFT). However, conventional AFT crystals suffer from irregular morphologies, leading to poor flowability, low bulk density, and severe caking. In this study, we successfully prepared highly spherical AFT particles in an additive-free aqueous solution. Through integrated offline and in-situ analyses, we elucidated the AFT spherical agglomeration mechanism dominated by an "agglomeration-abrasion" process. Guided by this mechanism, key process parameters, including temperature, stirring rate, and residence time, were systematically optimized using response surface methodology. Under the optimized conditions, the resulting AFT particles achieved an average circularity of 90.74% and a high yield of 85.7%. Compared to commercial powders, the optimized spherical AFT exhibited maximum improvements of 30.1% in bulk density and 41.4% in flowability, along with significantly enhanced anti-caking properties. The combination of spherical morphology and high yield enhances batch capacity while offering potential for continuous production, providing a green and cost-effective route for the industrial manufacturing of high-quality AFT powders.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |