Project Overview
The Dali Gold Mine, located in Yunnan Province, China, is a promising gold extraction site utilizing the pond leaching technique. The mine is characterized by its gold-bearing oxidized ore, which presents favorable conditions for leaching due to its high degree of oxidation and relatively low levels of harmful impurities.
Geological and Mineral Characteristics
- Ore Type: Gold-bearing oxidized ore
- Oxidation Degree: High
- Impurities: Relatively low harmful content
- Average Gold Grade: 14 g/t
These characteristics make the ore particularly suitable for pond leaching, a low-cost and environmentally favorable technology that allows for efficient extraction of gold from oxidized materials.
Processing Method
- Leaching Technique: Pond Leaching
- Leaching Efficiency: Up to 93% recovery rate
Pond leaching at Dali Gold Mine has demonstrated high recovery rates, with leaching efficiency reaching up to 93%. This performance reflects the compatibility between the ore’s physical and chemical properties and the applied leaching method.
Project Advantages
- High Ore Grade: An average gold grade of 14 grams per ton is considered high, contributing to the economic viability of the project.
- Efficient Recovery: A leaching rate of up to 93% ensures maximum extraction of gold from the ore, reducing waste and improving profitability.
- Favorable Ore Composition: The high oxidation level and low impurity content minimize processing complications and reagent consumption.
- Cost-Effective Process: Pond leaching is a relatively low-capital and low-operational cost method, ideal for oxide ores like those found at Dali.
Environmental and Operational Considerations
The project integrates environmentally responsible practices by using pond leaching, which generally has a smaller environmental footprint compared to heap or tank leaching. Proper containment and monitoring systems are in place to prevent leachate leakage and groundwater contamination.
Conclusion
The Dali Gold Mine project in Yunnan Province demonstrates considerable potential due to its high-grade, oxidized ore and the proven effectiveness of pond leaching. With a leaching rate of up to 93%, the mine offers strong economic returns while maintaining environmental and operational sustainability. It serves as a model for efficient gold extraction from oxidized ore bodies using cost-effective and scalable technology.
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