I think Namoya will have lower AISC than Twangaza because its heap leaching processing method.
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The main advantages of HL technology are, as follows:
lower CAPEX and OPEX rapid payback no tailings disposal simple design and equipment less environmental concerns quick construction phase lower energy and water requirements applicable to low-grade ore, tailings and waste stockpiles Currently, HL technology is successfully used to extract gold, silver, copper, nickel, uranium, and even iodine.
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