GNBD3073 Double Deck Banana Screen Applied in Iron Ore Classification

If there are two main stages in mining exploration, the first one is crushing or grinding and the second step is the classification. By means of crushing or grinding, the links between the useful mineral or metal and the gangue are broken, while the classification is to choose the useful material from the useless ones.

As a critical procedure in iron ore processing, the double-deck banana screen has been widely used because of its high performance in classification, high throughput, and space-saving design. The gradually decreasing slope design is one feature of banana vibrating screens, and it is named as banana vibrating screen because of this feature, too. With this slope, it realizes equal-thickness screening, a key advantage over traditional vibrating screens in handling iron ore of varying particle sizes.

In iron ore classification, the double-layer structure enables two-stage separation in one unit. The upper deck with a steeper incline (25°–30°) rapidly stratifies materials, removing coarse particles efficiently. The lower deck with a gentler slope (10°–13°) achieves precise fine separation, producing three graded outputs: oversize, midsize, and fines. This staged process ensures screening efficiency above 95% and effectively controls the feed particle size for downstream operations like grinding, reducing energy consumption by up to 15%.

Engineered for tough mining conditions, GN Separation's banana screens features high-strength structures and efficient exciters, supporting throughput up to 2000 tons per hour. Its polyurethane screen panels minimize screen blinding even for high-moisture iron ore. With the double deck design, the output is increased within a limited footprint and operational costs, making it indispensable for large-scale iron ore processing. And the iron ore processing is not the only application of a banana screen. A large banana vibrating screen is also used for other industries like the sand and aggregates and etc.

GN Trash Screen Used for Impurity Removal before Iron Ore Flotation

In the competitive landscape of iron ore processing, efficient impurity removal has emerged as a critical factor in enhancing flotation performance and ensuring high-quality iron concentrate output. Recently, the application of GN Trash Screen in pre-flotation impurity removal processes has garnered widespread attention from the mining industry, marking a significant breakthrough in optimizing ore beneficiation workflows. This advanced screening equipment is redefining efficiency standards by effectively eliminating harmful impurities that have long plagued flotation operations.

Iron ore flotation, a key step in separating valuable iron minerals from gangue, is highly susceptible to the adverse effects of impurities such as wood chips, plastic debris, clay lumps, and coarse gangue particles. These contaminants can disrupt flotation bubble stability, clog processing pipelines, damage downstream equipment, and ultimately reduce iron concentrate grade and recovery rates. Traditional impurity removal methods, such as manual sorting or conventional vibrating screens, often suffer from low efficiency, high labor costs, and inadequate impurity separation, failing to meet the rigorous requirements of modern large-scale iron ore processing.

GN Trash Screen addresses these pain points with its innovative design and superior performance. Equipped with high-strength polyurethane screen panels and a robust vibration system, the equipment efficiently sieves out impurities of various sizes while ensuring unobstructed passage of ore slurry. The self-cleaning function of the screen panels, enabled by optimized vibration parameters, minimizes screen blinding even when processing high-moisture iron ore with high clay content—a common challenge in wet processing scenarios. Unlike traditional equipment, GN Trash Screen boasts adjustable screening precision, allowing operators to tailor the process to specific ore characteristics and impurity removal requirements, ensuring targeted separation of harmful contaminants.

Such trash screens from GN Separation can be used for other mining for metal and for minerals. Please contact GN for more information.

GNLW223 Decanter Centrifuge Revolutionizes Diamond Core Drilling Efficiency​

The global mining and exploration industry witnesses a game-changing advancement as the GNLW223 decanter centrifuge with 9 inch diameter bowl emerges as a pivotal tool for diamond core drilling operations. Designed to address the industry’s long-standing challenges of slurry separation and sample integrity, this compact yet high-performance equipment is redefining operational standards across exploration sites worldwide.​

Diamond core drilling requires precise extraction of subsurface rock samples to evaluate diamond deposits, demanding equipment that can handle high-density slurry while preserving core sample purity. GNLW223 decanter centrifuge delivers exceptional solid-liquid separation efficiency, with a processing capacity tailored to the demands of mid-scale to large drilling projects. Its advanced bowl design and variable speed control enable the removal of fine particles from drilling fluids, reducing equipment wear and extending the lifespan of drilling tools—critical factors in remote exploration environments where maintenance access is limited.​

Industry leaders have already reported significant improvements after adopting the technology. A recent diamond exploration project in North America saw a 30% reduction in drilling fluid replacement costs and a 25% increase in core sample quality, as the centrifuge’s efficient separation minimized contamination. “This equipment has transformed our operations by ensuring consistent slurry performance and reliable sample analysis,” noted a senior geologist at a leading mining company. “It balances portability with power, making it ideal for both onshore and offshore drilling sites.”​

As a manufacturer, GN Separation highlights the centrifuge’s durability and adaptability, with corrosion-resistant materials that withstand harsh drilling conditions. As the diamond exploration sector shifts toward more sustainable and cost-effective practices, the 9-inch decanter centrifuge is poised to become an indispensable asset, driving efficiency and accuracy in resource discovery. With ongoing technological refinements, this equipment is set to play a key role in unlocking new diamond reserves while reducing environmental impact.

GNLW454GT Diameter Bowl Mud Dewatering Centrifuge Launches for Hydrovac Slurry Treatment

GN Separation has lauches a cutting-edge 18-inch diameter bowl mud dewatering centrifuge officially to the market, tailored specifically for efficient hydrovac slurry treatment. This specialized equipment addresses the unique challenges of handling high-solids slurry generated by hydrovac excavation, offering a game-changing solution for construction, utility, and environmental service providers.

​Engineered with a 18-inch (457mm) diameter rotating bowl, GNLW454GT-VFD centrifuge delivers exceptional centrifugal force to separate solid particles from liquid in hydrovac slurry. Hydrovac excavation, which uses high-pressure water and vacuum to safely dig trenches and holes, produces large volumes of slurry containing soil, sediment, and contaminants—material that requires proper treatment before disposal. The new centrifuge’s robust design enables it to process up to 40 cubic meters of slurry per hour, efficiently dewatering sludge to a dry solids content of over 35%.​

Key to its performance is the optimized bowl-to-screw ratio, which ensures thorough separation even for fine-grained particles common in hydrovac slurry. Unlike conventional dewatering methods that are time-consuming or generate excessive waste, this centrifuge reduces slurry volume by 70%, minimizing disposal costs and environmental impact. It also features a corrosion-resistant stainless-steel bowl, built to withstand the abrasive nature of hydrovac slurry and ensure long-term reliability in harsh working conditions.​

“GN has big bowl centrifuges and it is a critical innovation for hydrovac operators,” noted an industry technical director. “Hydrovac slurry is notoriously difficult to treat due to its variable composition, but this centrifuge’s precise separation capabilities let operators meet regulatory requirements while improving project efficiency.”GN Separation designed for the equipment with a user-friendly control panel, allowing for real-time adjustment of operating parameters and remote monitoring to streamline workflow.​

As the demand for eco-friendly construction practices grows, this 18-inch diameter bowl mud dewatering centrifuge emerges as an essential tool for hydrovac slurry treatment. It not only enhances operational productivity but also supports sustainability by reducing water waste and ensuring compliant disposal of solid residues. This launch marks a significant advancement in specialized centrifugal technology, catering to the evolving needs of the construction and environmental services sectors.

GN 13 Units 5-Deck Stack Vibrating Screen for Classification of Ilmenite Ore

The Stack vibrating screens by GN Separation has revolutionized fine particle separation in mining by combining high capacity, precision, and compact design. Unlike traditional screens, it features up to several parallel-stacked decks, enabling simultaneous multi-stage screening in a minimal footprint. This configuration boosts throughput by 2.5–3 times compared to single-deck systems, making it ideal for high-volume operations like mineral processing and ore beneficiation.

Key technical advantagesof a GN stack vibrating screen:

1. high-frequency linear motion, driven by dual vibrating motors. These motors generate uniform vibrations across all decks, ensuring efficient particle stratification and preventing clogging.

2. The screens used for the stack vibrating screens are polyurethane meshes without frame, made with are large open area up to 40%, allowing fine particles as small as 45 µm (325 mesh) to pass through while maintaining durability.

3. The non-blinding design reduces downtime, and the drawbolt tensioning system enables quick panel replacement in 30–40 minutes.

Additionally, the Stack vibrating screens’ wet screening capability optimizes water usage, critical for dewatering and slurry processing. With applications spanning gold, copper, and iron ore processing, this technology improves product quality, reduces waste, and lowers operational costs. Its scalability and reliability make it a cornerstone of modern mining efficiency.

GN Newest Case: each year, GN Separation manufactures more than 250 sets of vibrating screens, delivered to more than 70 countries in the world. In a recent project just finished the handover last week, GN Separation provided 13 sets of GND5Z-1014A stack vibrating screens, which has 5 decks and 10 screen meshes on one machine to a client in domestic China, for an Ilmenite ore mining company. In practice, the stack vibrating screens are used for other mines like copper, gold, lead, iron ore processing and etc.