Larox Filters Provides the Optimal Solution for Recovery of Magnesium Hydroxide from Naturally Occurring Brine Solutions

LAPPEENRANTA, FINLAND - February 6, 2008 - Larox offers a superior solution for
the recovery of Magnesium (as Magnesium Hydroxide) from naturally occurring
brine solutions producing a filter cake of magnesium hydroxide with around 100
ppm chlorides and a filtrate containing < 20 ppm suspended solids, thereby
ensuring essentially 100% recovery of the precipitated magnesium hydroxide. 

Flowsheet showing the Larox C Series and Scheibler Polishing Filter in the
magnesium hydroxide circuit with a thickener clarifier 

The combination of the Larox "C" Series Automatic Pressure Filter together with
a Scheibler "A" Series Polishing Filter provides a superior solution for the
recovery of Magnesium Hydroxide from naturally occurring brine solutions from
processes using a thickener / clarifier for the hydroxide recovery. 

The "C" Series Automatic Pressure Filter is operated with cake washing to
reduce the residual Cl- levels in the filter cake to < 100 parts per million,
while at the same time the Scheibler "A " Series Polishing filter can produce a
clarified filtrate containing <20 parts per million solids in the exiting
stream. The solids discharge from the polishing filter is in the form of a
sludge that goes back into the feedwell of the thickener, effectively ensuring
100% recovery of the precipitated Magnesium Hydroxide. 

The same configuration can be used for any process around a thickener / settler
or clarifier where the solids need to be isolated and a very clear filtrate is
required. 

Larox "C" Series advantages

• Superior washing with reduced wash water
• Fully automatic operation ensures lower operating costs
• Drier filter cake reduces downstream costs

Scheibler "A" Series advantages

• No moving parts
• Cleaner filtrate - as low as 10 - 20 ppm
• Pre-coat or body feed not required
• Short cleaning / discharge cycle recycles back to thickener
• Very low energy usage - low pressure feed only

The Larox “C” Series filters, the Scheibler polishing filter and the full range
of Larox products are fully supported by the Larox Service group, the most
comprehensive and experienced network in the industry, covering the world with
operations in over 40 countries and providing reliable support throughout the
entire lifecycle of the product. 

Larox is committed to helping its clients meet the following goals
• Reduced lifetime production costs - especially energy based costs
• Improved product quality, value and consistency
• Improved safety, health and environmental performance
• Improved yield and productivity.

About Larox Group
Larox is a leading innovator and supplier of solid/liquid separation solutions
for the world's process industries. Companies in mining and metallurgy,
chemical processing and related industries benefit from our high-performance,
high-efficiency process solutions, technologies and products. Larox operates in
over 40 countries and has over 430 employees. Larox Group is headquartered in
Lappeenranta, Finland. 

In addition to Larox our major product names are Ceramec, Scanmec, Hoesch,
Pannevis and Scheibler. Most of the product names have served the markets for
several decades, and they are now supported by Larox aftermarket services. 

For more information please contact:

Larox Corporation
P.O. Box 29
53101, Lappeenranta, Finland
Phone +358 5 668 811
Fax +358 5 668 8277
E-mail info@larox.com
Internet www.larox.com