A perfect match: high resilience rubber screens and anti-blinding rods
The quarry of Riuma Mining is an automated plant and is part of a complex that includes, among others, an asphalt and concrete factory and Riuma Ambiental responsible for a landfill of Inertes that performs RCC recycling.
Automatized and designed for a nominal capacity of 500 tons per hour of mineral aggregates with a particle size of less than 21mm, the unit faced the challenge of an above average presence of fine contaminants. The quarry, however, was running at a production level of 300 tons per hour. The reason for the low performance was simple: the increased moisture was causing the material to clog the screens, hamper production, and adversely impact the quality of aggregates delivered. Today, six months after introducing Metso’s solution, the problems are solved.
The turnaround at Riuma involved a lot of changes. The main change was the adoption of rubber screening media from Metso, complemented by the use of Anti-blinding rods, a device already used in the fertilizer market, but not commonly used in the aggregates industry. The combination created a perfect solution: it prevents the holes on the screens from clogging, reduces the level of contamination of fines, and stabilizes the production. In the process, Riuma installed 180 rubber screening media panels in their deck and evaluated the performance when Anti-blinding rods were also used, especially during rainy seasons when there is a bigger problem with moisture in the feed material.