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Boral has invested in a CDE EvoWash 101 fines recovery sand plant.
Boral has invested in a CDE EvoWash 101 fines recovery sand plant.

Supplier joins forces with Boral on silica recycling

Water and materials recycling has become an important consideration for any company and CDE Global is working with Boral in WA to make it a reality.
At Moora, north of Perth, Boral is working with a quarry operation owned by Simcoa Operations to produce high quality quartzite ore.

This ore is typically 75-25mm in size, with all 0-7mm previously sent to waste lagoons. Boral wanted to implement a process whereby the water could be recycled and recovered from within an extremely dry climate where water supply is limited.

Paul O’ Brien, Boral’s fixed plant engineering manager, began a consultation process with CDE Global after which CDE offered a design and proposal that demonstrated savings in material recovery.

CDE then designed, manufactured and installed a system that eliminated the loss of quality fines (0-5mm) while controlling water levels for reprocessing.

As a result of their operating needs, Boral invested in a CDE EvoWash 101 fines recovery sand plant complete with an M1508 radial stockpile conveyor and a LQPP 25 flocculant make up and dosing system.

With this equipment, the end result is a high quality, fine sand recovery with an efficient cut at 63 micron (µm).  

Before the introduction of the new CDE fines recovery plant, the operation was losing a significant proportion of quality fines to the waste ponds.  

The main ore product is smelted by Simoca Operations for a variety of purposes including silicon chips, improving the strength of aluminium, optical glass, and use in solar energy, namely for the production of solar panels.

“The washing equipment from CDE Global has allowed operations to accurately separate at 63µm which has in turn, produced a high quality sand product with low moisture levels, whilst rapidly recirculating water following treatment processing,” said Jeff Post, Boral’s quarry manager at Moora.

“We are now recovering and producing 25 to 30 tonnes per hour of quality sand with the total feed rate to the plant being 225 tonnes per hour.  This technology has allowed us to increase efficiency by reducing the costs incurred through pond dredging to recover sand we had lost using the previous system.”

The improved opportunities for the recycling of process water and reduction of fines to settling ponds have facilitated a move to production throughout the year, where previously the site was operating only over an eight month period.

The by-products of the production process are sold off to third parties in the region for various uses including further processing and general aggregate use, thus ensuring that there is zero waste from the process.

CDE Global products are distributed in Australia by Minroc (east coast) and 888 Crushing & Screening Equipment (west coast).

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Tuesday, 15 October, 2019 12:14am
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