GN Separation has recently and successfully finished assembling and conducting factory tests on four GNLW764 Big Bowl Decanter Centrifuges for a client in Peru. These high-capacity machines, tailored for demanding industrial scenarios, are set to play a pivotal role in the tailings dewatering processes within the mining industry. They aim to tackle challenges related to water conservation, adherence to environmental regulations, and enhancing operational efficiency.

The Significance of Decanter Centrifuges in Mining Tailings Dewatering

Mining operations produce enormous volumes of tailings, which are a mixture of water, fine particles, and residual minerals. Effective treatment of these tailings is essential before disposal or reuse. Conventional tailings management methods, like ponds or dams, are increasingly under scrutiny due to limited space, environmental hazards, and regulatory pressures. In this context, decanter centrifuges have emerged as a game-changing technology, enabling swift and efficient separation of solids from liquids.

GNLW764: Designed for Large-Scale Industrial Applications

The GNLW764 Decanter Centrifuge, GN Separation's flagship model and the largest in its current product range, is engineered to withstand the rigorous demands of high-volume processing. Featuring a 30-inch (764 mm) bowl diameter and a robust construction, this machine is ideally suited for applications such as mining tailings dewatering, tunnel boring machine (TBM) slurry separation, and other industrial processes that require significant throughput.

1. Tungsten Carbide Protection for Enhanced Longevity

Mining environments are highly abrasive, with tailings containing coarse particles that can quickly wear down equipment. To address this issue, GN Separation has applied tungsten carbide coatings to critical components, including the screw conveyor (spiral) blades and solids discharge ports. Tungsten carbide is well-known for its exceptional hardness and resistance to wear and corrosion. These coatings significantly extend the service life of these parts, reducing downtime and maintenance costs. This ensures consistent performance even in the most challenging conditions, providing mining operators with a reliable and durable solution.

2. VFD Control Cabinet for Precision and Safety

The GNLW764 is outfitted with a Variable Frequency Drive (VFD) control cabinet, which allows for precise adjustment of rotational speed to optimize separation efficiency for different feed materials. This flexibility enables operators to customize the centrifuge's performance according to specific process requirements, whether dealing with fine clay particles or coarser minerals. In addition to speed control, the VFD system incorporates real-time monitoring of temperature and vibration levels to ensure safe operation.

Complementary Technology: GNSJY6000 Flocculation Dosing Unit

To further improve dewatering performance, GN Separation suggests pairing the GNLW764 with its GNSJY6000 Flocculation Dosing Unit. This system automates the injection of flocculants—chemicals that cause fine particles to clump together into larger, more manageable aggregates—into the feed slurry. By optimizing the flocculation process, the combined solution achieves superior solids capture rates and higher water recovery.

Looking Forward

As the global mining sector continues to prioritize sustainability and efficiency, GN Separation's ongoing investments in research and development, along with its global service network, ensure that clients receive not only top-quality equipment but also comprehensive support throughout the equipment lifecycle.

With the GNLW764 Decanter Centrifuges now prepared for dispatch, GN Separation is well-positioned to solidify its reputation as a professional provider of industrial separation technologies, delivering value to clients and contributing to a more sustainable future for the mining industry.

This October, the global mining sector will gather in Beijing for the 21st China Coal & Mining Expo (CCME 2025), a top-tier event focused on propelling advancements in coal and mineral extraction technologies.

Event Overview

Set to run from October 28 to 31, 2025, at the Capital International Convention and Exhibition Center in Shunyi, Beijing, CCME 2025 is expected to draw a diverse range of exhibitors. These include prominent domestic and international manufacturers, technology suppliers, and industry specialists. Over the course of four days, the exhibition will zero in on sustainable mining practices, automation, and equipment innovation, providing attendees with a gateway to the latest and most effective coal mining solutions.

GN Separation's Participation

GN Separation is among the exhibitors and will be stationed at Booth A4601. The company is set to display a range of equipment aimed at tackling key issues in coal preparation, tailings management, and underground mining operations.

1. Large Flip-Flow Vibrating Screen

The centerpiece of GN Separation's exhibit will be its Large Flip-Flow Vibrating Screen, a groundbreaking screening technology tailored for fine-grained and sticky materials. Traditional vibrating screens often encounter problems like clogging and inefficient separation when handling fine coal, wet ore, or materials rich in clay. GN's flip-flow design, however, breaks through these limitations. By integrating a flexible polyurethane screen surface with a double-mass near-resonance working principle, it prevents screen blinding and pegging, ensuring a steady throughput. In the realm of coal mining, this equipment proves especially valuable for pre-screening raw coal before the washing process, thereby easing the load on subsequent operations.

2. Tailing Dewatering Decanter Centrifuge

Tailings disposal stands as one of the most urgent environmental challenges in the mining industry. GN Separation's Tailing Dewatering Decanter offers an eco-friendly solution. It reduces the water content in mine waste, separating solids from liquids to produce a dry, stackable cake. This not only minimizes land use but also lowers the risk of leachate. In coal preparation plants, the decanter centrifuge facilitates the recycling of process water, cutting down on freshwater consumption. With a capacity of up to 100 cubic meters per hour, it is an ideal choice for mid-to-large-scale operations looking to enhance waste management while adhering to ESG (Environmental, Social, and Governance) standards.

3. Underground Coal Sump Slurry Separation System

Underground mining environments present unique hurdles, such as limited space, water inflow, and the urgent need for efficient slurry handling. GN Separation's Underground Coal Sump Slurry Dewatering System addresses these challenges by integrating a compact decanter centrifuge with a pre-screening module. It treats the muddy water generated during roadway tunneling, coal extraction, and dust suppression. The system first separates coarse solids using a screening cyclone combination unit, and then transfers the slurry to a dewatering centrifuge for fine particle separation. This process eliminates the need for manual sump dredging, ensures smooth mine drainage, and supports safe, efficient, and eco-friendly mining practices. Typically designed in a modular fashion, the system is easy to transport, install, and relocate, enabling mobile use.

GN Separation: Leading the Way to a Sustainable Mining Future

With over ten years of experience in separation technologies, GN Separation has cemented its reputation as a reliable partner for mining companies across the globe. Its participation in CCME 2025 underscores its commitment to innovation and customer-focused design. Visitors to Booth A4601 will have the chance to interact with technical experts, witness live demonstrations, and explore customized solutions tailored to their specific operational requirements. We warmly invite you to visit GN at the expo.