Eriez liners boost safety, energy use for Peru operation

A new report from Eriez reveals how a set of its Magnetic Mill Liners (MMLs) are significantly improving safety standards, energy efficiency and operational longevity at a Nexa Resources installation in the central Andes region of Peru.

It is the latest international success story featuring the MML, a wear-resistant steel-encased magnet that combines the best qualities of steel and magnetic liners. 

The report highlights the superiority of MMLs over conventional liners by describing the numerous benefits these advanced liners offer. Each MML is composed of individual sections that are much lighter than traditional liners, facilitating safer and easier installation procedures.

Weighing only 20 to 40 kilograms per section, the MML eliminates the requirement for specialized cranes within the mill, streamlining operations and enhancing safety protocols. Nexa credits the MMLs installation with contributing to the company’s achievement of a major Peruvian safety award. 

As explained in the report, there are considerable environmental advantages associated with the implementation of MMLs. Heavier steel liners require enormous fuel consumption for transportation and material handling while lightweight MMLs can be installed by hand. Additionally, Nexa reports a significant reduction in noise levels with the MML, creating a more favorable work environment overall. 

The case study also highlights the energy-efficient aspects of MMLs. In traditional ball mills, small ball chips do not contribute to the grinding process, leading to wasted energy. However, MMLs effectively eliminate the presence of small ball chips, resulting in energy savings of up to 11% during the grinding process.  

The exceptional durability of MMLs is another standout feature discussed in the report. Unlike conventional liners that necessitate frequent replacement, the Eriez MML has garnered a track record of success through many installations in diverse mining operations worldwide, including iron ore, copper, nickel and gold mines, as well as other nonferrous mines. These installations provide evidence that MMLs outlast rubber or metallic liners by two to three times.  

The complete Nexa MML case study report is located at here.


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