Tag Archives: gravity separation

FLSmidth takes gravity separation to a new level with Knelson GX Concentrating Cone

The latest innovation in semi-continuous gravity separation from FLSmidth is delivering a key breakthrough in performance that increases recovery and cuts maintenance downtime, according to the OEM.

For decades, Knelson gravity concentrators have been recognised for their recoveries of gold and precious metals, but the development of the new Knelson GX Concentrating Cone is set to take this performance a step further.

The new patented GX Cone delivers impressive recovery enhancements due to enhanced water distribution within each ring, according to the company.

FLSmidth explains: “As water enters from the base, it flows through zone separator nozzles for a customisable fluidisation profile. This allows for even distribution of water in each ring; the new design also significantly increases the active recovery surface area. The result is a step change in overall coarse and fine gold recovery.”

Test data shows that gold recovery in all size fractions, from course to fine, improved significantly with the GX Cone, according to the company.

By incorporating an advanced distribution of fluidisation water across the entire concentrating cone, the Knelson GX facilitates the highest possible recovery of coarse and fine gold. At the same time, balanced water distribution across the concentrating cone allows for a significant reduction in fluidisation water requirements while improving recovery.

The third major benefit of the Knelson GX is easier maintenance. Because it is made of a customised, abrasion-resistant and durable polyurethane compound, maintenance frequency and operational costs are significantly reduced, FLSmidth says.

Mike Lefler, Head of Global Product Line Manager for Precious Metal Recovery at FLSmidth, said: “The new Knelson GX Concentrating Cone is the culmination of over 40 years of research and operational experience and is exciting news for our customers. It delivers a win-win-win scenario: better recovery, less water use and less downtime due to easier maintenance.

“In short, it helps customers produce more with less resources – a central tenet of our MissionZero ambition to cut water and energy waste in mining by 2030.”

Holman Wilfley shakes up manufacturing base with solar installation

Holman Wilfley, as part of its continuing environmental policy development, has completed the installation of the first 20 kW array of solar photovoltaic panels to power its main assembly factory in Pool, England.

In addition to supplying its factory, the installation will also allow surplus natural energy to feed back to the grid, contributing to government targets for clean energy generation, Holman Wilfley said.

“Our gravity machine assembly processes will make use of this clean element of energy for general operations, and testing,” the company said. “This will help Holman Wilfley reduce its carbon footprint and environmental impact.”

With this installation, the company says it can assist the mining sector’s drive for sustainability, joining a community of 140,000 independent green energy generators.

Holman Wilfley supplies gravity separation technology to the minerals, metals and recycling industries.

Its shaking tables provide efficient gravity separation of fine minerals in the mining space, with its customers currently using this equipment to produce concentrates of gold (alluvial and milled ore), tin, tungsten, tantalum and chromite. In these operations, the tables are usually used as the final stage in gravity circuits.

The company’s gravity separation equipment is also found throughout the mineral sands space, where the tables are often the primary concentrating technology.