Driven by a spiral agitator, grinding media (such as steel balls) perform multi-dimensional motion in the grinding chamber, exerting combined effects of grinding, impact, and shearing on materials to achieve high-efficiency fine grinding. The grind fineness can reach 200 to 1000 mesh with a more uniform particle size distribution, which completely breaks down mineral encapsulation and liberates fine-grained gold, creating optimal conditions for subsequent recovery. Adopting vertical flexible laminar grinding technology, it ensures even more uniform grind size, effectively improving concentrate grade and recovery rate. It integrates grinding and leaching in one process, with the grind fineness adjustable from 200 to 1000 mesh according to process requirements.
Equipped with a unique integrated grinding-leaching function, it damages the mineral surface and diffusion layer, significantly increasing gold leaching rate by 15% to 30%. It shortens leaching time, reduces operating costs, and achieves over 35% energy savings compared to traditional ball mills.
For polymetallic ores and refractory ores, this equipment has significant advantages: low energy consumption cost, and the ability to quickly grind iron ore, copper ore, gold ore, etc., to 325-400 mesh, enabling the liberation of most impurities from target minerals. When ground to a certain fineness, many impurities in the ore can be naturally liberated, thereby reducing the difficulty of mineral purification, improving the finished product grade, and creating favorable conditions for subsequent flotation, magnetic separation and other processes. Equipped with advanced integrated grinding and leaching technology, it can also improve the metal ore grade while grinding.
Especially performing outstandingly in the purification of various metal tailings—copper and molybdenum tailings usually contain about 40%-45% iron, but due to high impurity content and low grade, they have low market value. After grinding such tailings to 325 mesh with the Vertical Stirred Ball Mill, impurities such as silicon, arsenic and zinc in the raw materials can be fully liberated. It not only can efficiently separate iron existing in the form of fayalite and iron silicate in copper tailings, and high-grade iron concentrate can be extracted through subsequent magnetic separation, but also can simultaneously improve the iron resource utilization rate of molybdenum tailings, significantly enhancing the overall value of tailings.
Vertical stirred ball mills are particularly suitable for fine grinding of metal ores with fine dissemination size and low liberation degree in the gold recovery process from copper tailings, thanks to their high-efficiency fine grinding capacity and energy-saving features. Their applications include ultra-fine grinding and regrinding of non-ferrous metals such as gold, silver, copper, lead, and zinc; regrinding and reprocessing of flotation tailings and concentrates; ultra-fine processing of non-metallic minerals (e.g., calcium carbonate, kaolin, mica); tailings recycling (recovery of valuable components from old tailings); and metallurgical leaching (integrated grinding-leaching to improve leaching efficiency).
As the core fine grinding equipment in modern concentrators, vertical stirred ball mills are replacing traditional ball mills worldwide and becoming the technical benchmark in the fine grinding field.
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