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