Cavex® DE Hydrocyclone

About this product

The Cavex® DE cyclone is an innovative classification unit, with two stages of separation incorporated into the one piece of equipment. It works without the need for intermediary pumping, piping or sumps. Overview The Cavex® DE cyclone features the innovative laminar spiral inlet geometry design of the Cavex® hydrocyclone range, but with the addition of: • A primary and secondary hydrocyclone to create a two-stage classification and separation system • An Air Core Booster (ACB) incorporated to the top of each hydrocyclone • The underflow stream from the primary cyclone is directly fed into the secondary cylindrical-conical cyclone without the need of intermediate pumping. The bottom of the primary cyclone consists of an inverted cone within a cylindrical housing. The gap between the cone and the housing acts like a traditional cyclone spigot and controls the underflow stream to the secondary cyclone. This gap can be adjusted to optimise the flow split into the secondary cyclone by moving the cone vertically. As the slurry enters the second stage, additional water can be injected to maximise efficiency, particularly of the fines removal. This makes Cavex® DE the preferred cyclone for tailings and desliming applications. Frequently Asked Questions What level of performance can we expect from a Cavex® DE hydrocyclone versus a typical hydrocyclone? Cavex® DE hydrocyclones produce less bypass of fines and higher concentration weight in the underflow for the same P80 compared to a traditional cyclone. It can also improve the overall classification process due to the flexibility of the equipment. These two-stage cyclones consist of two vortex finders, an apex in the first stage and water injection. When combined, these components work to better control the fine material going to the underflow. How does the Cavex® DE two-stage hydrocyclone work? The first stage of the Cavex® DE hydrocyclone consists of a cylindrical conical-bottom cyclone that uses an injection of water to release the fine material to the overflow. Only a marginal amount of water is required for optimal dilution before proceeding to the second stage. The second stage is run by a conical hydrocyclone equipped with an Air Core Booster (ACB). This allows the overflow of the Cavex® desliming cyclone to have a particle size distribution (PSD) that is close to what would be obtained with a traditional hydrocyclone, but with superior classification efficiency. This hydrocyclone produces a product in the underflow with significantly lower fines compared to other hydrocyclones. Features and benefits Improved Capacity This hydrocyclone has also been fitted with an Air Core Booster (ACB) to improve capacity and cyclone efficiency by reducing the total pressure across the hydrocyclone. It also increases the volume flow split to the overflow. Superior Performance in Desliming Applications The Cavex® DE cyclone contains a two-in-one system which improves two aspects of classification: 1) The bypass of fines to the underflow and 2) The misplacement of coarse particles in the overflow This means that fewer fine particles report to the underflow and back to the mill resulting in greater mill circuit efficiency. It also minimises over-grinding, which is particularly critical in flotation circuits. Superior Tailings Dam Performance The Cavex® DE cyclone minimises the amount of -200 mesh material in the underflow resulting in safer and reliable construction of dam walls. It also produces an underflow with high solids content. This makes it a suitable cyclone for tailings applications. Lower Capital and Operational Costs The two-in-one hydrocyclone reduces capital and operating costs as no intermediate pumping, piping or sumps are required. Its innovative design reduces wear in the transfer zone minimising repair and maintenance costs. Customisable for a Variety of Applications The Cavex® DE cyclone is available in a range of sizes (250 to 650mm) to suit varying applications. We can also design hydrocyclone clusters to retrofit into existing installations to maximise production and address operational or maintenance issues. Local After Sales Support All Cavex® hydrocyclones are backed by our unrivalled global support network that spans across more than 60 countries world-wide. Our team are always there for you, no matter how remote your operation is. We can also service machinery onsite for added convenience. Why Weir? At Weir, we've been manufacturing hydrocyclones for over 45 years, with the original Cavex® hydrocyclone setting new industry benchmarks when introduced over 20 years ago. Although, several attempts have been made by competitors to combine two-stage classification into one unit, their designs have shared common issues including: • High wear in the transfer zone • Poor control over the flow split to the secondary cyclone and • A need to operate the hydrocyclone at high pressures Our team are experts in innovative engineering. We have purposely built the Cavex® DE cyclone to deliver superior performance in the above areas, with greater flow control and reduced wear in the transfer zone. Additionally, we strive to meet the varying needs of customers and diverse applications with: • Our knowledgeable technical team • Reliable supply and inventory levels • Global presence and • Extensive after sales and service networks Applications Our Cavex® DE hydrocyclones are best suited for separation and classification of precious metals and minerals including copper, gold, silver, iron ore, lithium, phosphate, rare earths, potash and soda ash. • Bauxite / Alumina • Chrome • Copper • Gold • Iron • Kimberlite • Limestone • Lithium • Mineral Sands • Molybdenum • Nickel • Oil Sands • Zinc Processes • Fines Recovery • Fines Removal / Desliming • Producing Dry / Stackable Tailings • Thickening (Paste) • Water Recovery • Wet Classification Product specifications We can develop customised hydrocyclone solutions and provide simulations, drawings and mass balances depending on your application and requirements. If you need help or advice on a custom design, get in touch with our team of experts. Replacement parts The highest-wearing parts of a hydrocyclone are the cyclone spigot and apex. These will need to be replaced throughout the lifetime of your hydrocyclone, depending on the application. For more information about replacement of parts, please contact our team. Product upgrades and modifications Our Cavex® DE hydrocyclones can be customised to suit various applications, with a variety of cyclone spigots and vortex finders to maximise production. You can also upgrade or modify your hydrocyclone with an Air Core Booster (ACB) for enhanced performance. Services and maintenance Cavex® hydrocyclones are backed by our unrivalled global support network that spans across more than 60 countries world-wide. This means that our experts are here to support you, every step of the way, wherever you may be. Our expert team will work alongside you to deliver: • Customised cluster solutions • Customised lining to maximise wear life and reliability • Total hydrocyclone performance analysis Our extensive global network can provide services on site or at one of our 160+ dedicated service centres.