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This project is a comprehensive EPC (Engineering, Procurement, and Construction) project encompassing engineering design and equipment procurement. The client is an Australian mining investor. The project is located in Mongolia and is based on the development and construction of a mineral resource with a total gold reserve of approximately 25 tons.
Facing the stringent technical standards from the Australian investor and the challenges of Mongolia's extreme climate, the project team provided in-depth services from feasibility studies to full-professional engineering design. The services covered not only core processes and civil engineering but also customized power, water supply, drainage, and heating system solutions to suit local conditions.
The project's core highlights are twofold: First, through scientific comparative testing and scheme demonstration, the team optimized and selected a more economical heap leaching process route for the client while ensuring a recovery rate of up to 80%, effectively optimizing project investment and operating costs. Secondly, leveraging its leading domestic desorption electrolysis core technology advantages and efficient industrial chain integration capabilities, the project achieved rapid delivery, from contract signing to the shipment of a complete set of high-end smelting equipment, in just 7 months, demonstrating outstanding responsiveness and execution capabilities.
1. Core Technical Indicators
o Processing Capacity: Annual ore processing capacity of 1.2 million tons, with a supporting crushing system designed for a capacity of 5,000 tons/day.
o Ore Grade: Gold (Au) grade 1.45-1.6 g/t, Silver (Ag) grade 27 g/t.
o Process Selection: After experimental demonstration, the recovery rates of carbon leaching and heap leaching processes were similar (both approximately 80%), and the heap leaching process, which had a greater cost advantage, was ultimately selected.
2. Stockpile Operation Logic
o Operation Mode: Leaching operations are carried out alternately in two stockpiles, using a single-layer stockpile.
o Loading Parameters: The loading capacity of a single stockpile is 150,000 tons per cycle.
o Operational Cycle: The system can operate for 8 months of the year. A total of 8 heap leaching cycles are conducted annually (4 cycles per heap site), with each leaching cycle lasting 2 months.
o Recycling Method: After each leaching cycle, the waste rock is cleaned up and re-piled on the original site, achieving efficient recycling of land and site resources.
Facing the complex challenges of deep gold mining, how can we safely and efficiently recover valuable resources in high-risk geological environments? This demands we transcend traditional methods through scientific technology comparison and innovative application.
Process monitoring and control in beneficiation operations constitute a critical component of automation, involving numerous parameters of complex and diverse natures. At this stage, iron ore undergoes classification by a classifier and concentration by a collector to produce iron concentrate.
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