This is the seventh of an eight week short information program that is intended to keep people in the mineral processing sector up to date with the developments at Gekko Systems.

This week's topic:

Gekko InLine Spinner

Last week we highlighted the Gekko Laboratory, its capabilities and the services it offers. This week we are introducing the Gekko InLine Spinner and comparing it to other Batch Centrifugal Concentrators (BCC).

The Gekko InLine Spinner is a robust, simple, low maintenance batch centrifugal concentrator for gold concentration. It was originally developed to upgrade concentrates from the InLine Pressure Jig - a continuous gravity device.

In recognition of the highly competitive nature of the BCC market, the product has not received a high profile within the Gekko stable of products. However, with 60 units installed worldwide and positive feedback from customers it is clear that the InLine Spinner is a niche product that will not be ignored!

Customer Comments:

While Kurt Tiedemann was the plant metallurgist for Thunderbox he had this to say about the Gekko gravity circuit but particularly the InLine Spinner:

"I am very impressed at the upgrade we get using our Gekko gravity setup (IPJ, ISP). Typical feed to the InLine Pressure Jig ranges from 8-12g/t, with a Spinner concentrate product of 3000-4000g/t. With the high recoveries of the ILR, this is a very efficient and reliable setup."

"I am also very impressed with the InLine Spinner. Typically upgrades of 5000% plus are seen from this simple, low maintenance unit" says Mr. Tiedemann.

Comparison To Other BCC Devices:

Zero water consumption, no requirement for high quality water addition

The InLine Spinner achieves recovery through creating a vortex on the face of the spinning bowl through the use of an adjustable cutting bar. This design concept ensures the low maintenance and robustness of the unit when compared to the more complex back flush system used by the Falcon and Knelson Concentrator units. Clearly additional flush water and high quality water is not required to run this unit. In some cases this may save additional water filtration costs. The capital cost for an InLine Spinner is also lower than that of other high G concentrators.

High Availability - Low Maintenance
Small number of moving parts, simple automation, start up shut down sequence, no requirements to clean narrow orifices.

Lower volume device
The two units available have max capacity at 3 t/hr and 30t/hr reflecting their traditional focus on concentrate upgrade applications. The Gekko InLine Spinner is targeted for smaller or multiple gravity circuit applications.

Works well on heavy concentrates
The InLine Spinner is an ideal device to recover free gold from heavy material such as jig, table and spiral concentrates.

Unit Recovery
The unit recovery of the Spinner is excellent. Test work undertaken by Andre Laplante and Kundana during P420B AMIRA trials indicated that the Spinner recovery correlated very well to the GRG test work. See graph below.