### 1 HOLISTIC TAILINGS MANAGEMENT SOLUTIONS - Outotec

The proportion of tailings within the ores can be as high as 90–98% for some copper ores and is still increasing (Nagaraj, 2005). Gold plants process ores with up to 99.9% of tailings and only few grams of gold. This trend will continue as the mineral processing industry is required to increase ore processing capacity (Figure 1)