GNBD3073 Double-Layer Banana Screen Applied in Iron Ore Classification

Amid the global push for more efficient and sustainable mineral processing, the double-layer banana screen has emerged as a revolutionary solution for iron ore classification, redefining operational standards in the mining industry. This advanced screening equipment, leveraging the principle of equal-thickness screening and a innovative double-deck design, is addressing long-standing challenges in iron ore grading, such as low efficiency, uneven particle separation, and high energy consumption, according to industry insiders.

GN Separation is one of the leading manufacturers of the double-layer banana screens, and GNBS and GNBD series large banana screens, with singe and double layers stand out with their strong structural and functional advantages. Its screen surface features gradually decreasing inclinations—ranging from 25° at the feed end to 5° at the discharge end—which enables equal-thickness screening by optimizing material migration speed across different sections. The double-deck configuration allows for two-stage classification in a single unit: the upper deck efficiently separates coarse particles, while the lower deck achieves precise grading of fine fractions, producing three distinct particle size fractions that meet diverse processing requirements. Equipped with high-strength polyurethane screen panels and advanced box-type exciters, the equipment boasts a service life of up to 8 years—nearly twice that of conventional vibrating screens—and consumes 20% less power while handling 1.5-2 times the throughput of standard screens.

Field applications have confirmed the equipment's exceptional performance. A large iron ore mine in Western Australia, which recently upgraded its classification line with double-layer banana screens, reported a 15-20% increase in screening efficiency, reaching over 95%. The mine’s processing capacity rose from 800 tons per hour to 1,200 tons per hour, while energy consumption per ton of ore decreased by 18%. "The adoption of double-layer banana screens has significantly optimized our workflow," said a production manager at the mine. "The precise classification has also improved the efficiency of our subsequent grinding process, reducing overall operational costs by nearly 12%."We are fully confident that GNBD3073 will give a good performance in China, too.