Introducing the

Sepro Frontier Bowl

Innovative new bowl geometry with a parabolic riffle profile
  • 20% higher recovery on high-grade ore with coarse gold particles
  • 50% higher recovery on low-grade ore with fine gold particles
  • 47% reduction in cyclone overflow grade in industrial trials
DOWNLOAD FULL WHITEPAPER
Sepro Frontier Bowl Sepro Frontier Bowl gold recovery comparison chart

The Sepro Frontier bowl achieves significantly higher gold recoveries than the Knelson™ and the Falcon bowl under many test conditions.

Whether you’re looking to recover coarse gold particles or fine gold, the Frontier bowl is likely going to immediately improve your operation’s output.

Sepro Frontier Bowl close-up

The Sepro Frontier utilizes the concentration mechanisms from both the Knelson™ and Falcon concentrators. This makes the Sepro Frontier Bowl a superior choice in many mining operations.

DOWNLOAD COMPARISON DATA

How does it work?

The concept behind the parabolic riffle profile was to create a bowl with riffles on both sides of the dynamic slurry face. We wanted a smooth path for slurry flow up the bowl wall. The bottom riffles begin with a relative angle of 30 degrees and progressively decrease in angle until the top riffles are vertical.

The bottom riffles are exposed to the slurry flow, creating an eddy current zone of high turbulence. The top riffles are not directly exposed to the slurry flow, creating a non-turbulent zone of particle separation and recovery. In between is a transition zone where the angle of the bowl wall is equal to the angle of the dynamic slurry face.

This design dramatically improves overall gold recovery across a range of ore types, gold grades, and particle sizes.

Slurry Face Diagram

If you care about gold recovery, you don’t want to miss this

INCREASE YOUR GOLD RECOVERY TODAY

Have You Ever Wondered?

There have been anecdotal reports that the Knelson™ recovers more coarse gold particles, and the Falcon recovers more fine gold particles. Previously, no one has published any rigorous, controlled experiments at the industrial scale to determine the relative performance of these two types of gold centrifuges for both fine and coarse gold.

What if you could perform better for both?

Get the stats

or learn more below

Learn from an expert

Watch the breakdown of our whitepaper by Sepro’s Vice President of Research & Development,
Andrew Gillis, PhD

Improve Your Operations with Minimal Hassle

Sepro produced a Frontier™ bowl that fit as a direct replacement part in a Knelson™ XD48 gravity concentrator. The bowl was installed at a gold mine in North America currently operating two Knelson™ XD48 gravity concentrators with the standard Knelson™ riffle profile.

Here’s what we found.

Tests were run on each bowl over two days, using the standard plant settings for feed rate, bowl speed, fluidization flow rate, and concentration cycle times. The standard Knelson™ bowl achieved a cyclone overflow grade of 11.0 g/t Au while the Sepro Frontier™ bowl reduced the cyclone overflow grade to 5.8 g/t Au, a 47% improvement. This resulted in a 3x improvement in gravity gold recovery.

Sepro Frontier Gold-Copper Ore and Gold-Silver Ore comparison chart In pilot testing, we also observed 20% higher recovery on high-grade ore and 50% higher recovery on low-grade ore.

The Frontier™ bowl achieved these recovery improvements under all test conditions. From this information, we can infer that combining both concentration mechanisms (along with a smooth transition zone) dramatically improves overall gold recovery across a range of ore types, gold grades and particle sizes.

Based on the significantly higher performance of the Frontier™ bowl, it is a clear choice to use over any competing designs in the market.

Here are some of the benefits of the Frontier bowl as compared to traditional bowl profiles

  • 20% higher recovery on high-grade ore with coarse gold particles
  • 47% improvement in industrial trials, reducing cyclone overflow grade from 11.0g/t Au to 5.8 g/t Au
  • 50% higher recovery on low-grade ore with fine gold particles
  • Improved gold recovery from 18% to 54%, a relative increase of 300%
DOWNLOAD FULL WHITEPAPER

Specs

Learn from an expert

Watch the breakdown of our whitepaper by Sepro’s Vice President of Research & Development,
Andrew Gillis, PhD

Ready to improve your gold recovery with minimal hassle?

If you care about gold recovery, you don’t want to miss this

We Can Also Help With

Installation Supervision Icon

Installation Supervision

Ensuring factory-spec equipment installation is key to the success of your operation.

Commissioning Icon

Commissioning

Safety and operational testing to optimize recoveries.

Customer Support Icon

Customer Support

Our technicians are trained to support customers and minimize downtime.

Automation Support Icon

Automation Support

With installations in more than 94 countries around the world, we are experts in using automation training to drive recovery volumes and safety.

Training Icon

Training

We conduct classroom or hands-on training wherever you need it.

Lab Work Icon

Lab Work

Our in-house metallurgical testing facility is available to provide insightful lab work no matter which stage your project is at.