The turnkey plant includes a range of equipment from the CDE product portfolio including the M2500 with integrated Counter Flow Classification Unit (CFCU), EvoWash fines recovery system, fine sand screens, attrition cells and spirals.
The plant configuration also includes an AquaCycle thickener which reduces the volume of fresh water required to feed the washing plant by more than 90%. The design feed rate to the plant is 100 tons per hour and this produces 50 tons per hour of glass sand with an additional 30 tons per hour of concrete sand.
From an initial iron oxide (Fe2O3) content in the feed of 0.3% the glass sand is required to achieve 0.25% Fe2O3 in line with O-I’s sand specification for coloured glass. The final product has less than 0.1% iron oxide. The FE2O3 content in the final silica sand product is reduced to 0.1% ensuring that it meets the specification required by O-I at their Adelaide plant.
“We are achieving the 0.1% figure consistently which is as important as achieving the reduction in the iron content” explains Chris McKeown, CDE Project Manager.
From an initial silica content of 93% for the excavated material the final product achieves +99% silica.