As part of the implementation of the investment project “Development of the Yoshlik I deposit”, installation and commissioning of the latest equipment that meets international standards continues at the copper processing plant No. 3 under construction.

In particular, 6 modern highly efficient high-pressure press roll crushers HPGR 24/19-9 are installed, which, taking pieces of ore with a fraction of about 60 mm, crushes them to 6 mm using 2 rolls. The production capacity of this equipment is 3,085 tons per hour.

These days, the installation of 6 vertical mills produced by Metso Outotec HIGmill is also being completed. According to experts, these vertical mills are capable of processing ore bodies of complex composition, which require finer grinding for the most efficient enrichment of minerals.

The HIGmill consists of a mill body, a rotating shaft with grinding disks, fixed disks on the grinding chamber body, a gearbox and a drive. The grinding chamber is 70% filled with beads (special grinding medium). Rotating discs mix the load, which is crushed between the bead balls due to friction. The feed slurry is pumped into the mill through the bottom inlet. As the stream rises, it passes through all successive stages of grinding. The final product is discharged into the open top of the plant.

Thanks to the high and narrow vertical mill body, the grinding media are evenly distributed and the mineral particles are constantly in contact with them, which significantly improves grinding efficiency.

While traditional three-stage ball mills had the ability to grind product down to -30 microns, the new bead vertical mills grind product down to -20 microns. The use of new technologies in the production process allows us to achieve a high level of copper extraction - over 85% and molybdenum - over 50% from ore.

These mills are also energy efficient. Due to gravity, the bodies form a compact structure while the mill is operating, as a result of which high-intensity contacts occur between the bodies, and an effective and uniform transfer of energy occurs throughout the entire volume. The disk configuration and the geometry of the entire chamber are optimized for efficient energy transfer to the bead mass, internal circulation and classification.

In addition, the HIGmill implements a more complex, but at the same time compact, technological scheme compared to other bead mills. The advantage of a powerful vertical high-intensity mill is its extremely small installation area. The clearance above the mill is quite small, and the flanged design of the housing connection does not require much space for maintenance. The hanging mounting system at the top does not block the floor or sides of the installation, making it easier to handle and unload beads.

The latest technologies being introduced into the production processes of CCP-3 will allow the plant's concentrators to significantly increase the volume of ore processing.

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