Investigation of Ultra-Fine Grinding of Basalt Powder in Vibratory Mills: Grinding Efficiency and Implementation Potential

Abstract In response to the growing demand for eco-friendly materials and low-impact technologies, a study was conducted on the ultra-fine grinding of basalt in vibratory mills, with the basalt used for the experiments originating from the Targowica basalt quarry. Two types of basalt were used in the study: fine basalt consisting of particles with a size below 200 µm, agglomerated into lumps smaller than 100 mm, and aggregate with a particle size below 5 mm. The objective was to obtain a high proportion of the 0-10 µm particle size fraction, applicable in agriculture, construction, and environmental protection. Grinding tests were carried out for two types of feed material and different sets of grinding media. The best results were obtained using a mixture of steel grinding balls (Ø12 and 17.5 mm) with the addition of 0.4% polypropylene glycol, aimed at reducing agglomeration and improving grinding efficiency. In batch-mode operation, up to 70.5% of the 0-10 µm fraction was achieved. Although continuous grinding produced lower results (up to 44% of the 0-10 µm fraction), it demonstrated industrial implementation potential, especially after introducing chamber aeration and a modified material discharge method. The research confirmed the high industrial potential and effectiveness of vibratory grinding of basalt powder and indicated directions for further studies.