Sisp Screen Replacement Success Story - AMPCO Minerals

About the Project

At a gold mine site Asia Pacific, our customer operates a comprehensive crushing and processing circuit. The 1.6 – 1.8 Mtpa circuit includes a jaw crusher, cone crusher, magnets, conveyors, double-deck incline screen, and surge bins. Adjacent to this is a fully equipped ore processing plant featuring a semi-autogenous grinding (SAG) mill, ball mill, and associated systems. Designed to handle ore from multiple mines, the plant currently produces over 200,000 ounces of gold annually.

When Repairs Stop Working

The double-deck incline screen within the crushing circuit had begun to experience significant operational issues, resulting in reduced throughput and production delays. Over time, the screen decks had undergone several modifications in an attempt to boost performance and increase running time. However, the drive arrangement remained unreliable, and bearing failures became increasingly frequent, compromising both efficiency and uptime. AMPCO’s after-sales services are designed to help operations avoid reaching this point, but when replacement becomes the right call, we’re ready for that too.

A Precision Replacement Strategy

AMPCO Minerals, in collaboration with our trusted local partners Vanguard Mining and VanMak Technical Services, assessed the double-deck screen in operation and concluded that it had reached the end of its service life. Continued repairs would not meet the customer’s long-term availability and production targets.

To ensure seamless integration of a replacement screen, Vanguard Mining conducted a 3D scan of the existing screen installation. This data was shared with AMPCO Minerals’ engineering and technical team, who worked closely with the customer and Vanguard Mining to specify a screen model tailored to the site’s layout and performance requirements.

Circuit Performance Restored

AMPCO Minerals supplied our SISP8242 double-deck screen with a direct drive cardan shaft system, engineered for high-capacity performance and durability. Upon delivery, the existing screen and support structure were removed, and the new screen was installed within just five days. VanMak and AMPCO Minerals used precise site and equipment data, along with a clear understanding of the customer’s operational goals. They executed the transition smoothly, minimizing downtime and restoring optimal throughput. For another example of AMPCO’s work in gold mine processing, check out our Gold Mine Plant Project.