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The article is aimed at studying the process of free gold deformation extracted during grinding in various types of ball mills. Today, ball mills and similar machines are typically used for fine grinding of gold ores. Their working parts include armor plates of a shell, and balls used as grinding media loaded into the shell. Despite the fact that the ball mills dominate over the other fine grinding machines used to extract hard rock gold, they still have serious drawbacks. It is believed that only 2 to 20% of all consumed energy is spent directly on grinding, while the rest of it is used to overcome friction, heat formation, acoustic and mechanical vibrations, etc. In the meantime, mass deformation and degradation of free gold takes place in the mills. The particles degradation has a clearly adverse effect on their further benefication, and their shapes change to various extents as a result of deformation. If the deformation is aimed at forming an isometric shape of particles, their recoverability increases, while the reverse process decreases it.

Experimental and Theoretical Study Focused on Transformation of the Processing Properties of Gold in the Operating Area of a Ball Tube Mill