1. Heap leaching is a method of recovering gold from low grade ores . 2. They made do with low grade ore that still lay on the tip. 3. This method of leaching is usually suitable for low grade ores because it is very low cost. 4. In its upper valley near Steynsdorp are goldfields, but the reefs consist almost entirely of low grade ore . 5. Because ironsand is a low grade ore with many contaminants, the mill's primary plants'operations and equipment are unusual. 6. So you use your low grade ore to pay expenses, and reap the profits from the high grade. 7. These processes were applied to high grade uranium ores but may not work well with low grade ores . 8. On reaching Coe Hill in 1884, the mine was found to have low grade ore , nearly bankrupting the company. 9. Low grade ores would be used through beneficiation and mining operations would be conducted within a sustainable development framework.10. Moreover, it permits extraction from low grade ores -an important consideration in the face of the depletion of high grade ores.
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