cases
This expansion in Cambodia increased the gold plant's operating capacity from 240 t/d to a design capacity of 1,000 t/d. Xinhai Mining completed the mineral processing testwork and construction drawing design, supplied the gravity separation and carbon-in-leach equipment, and guided installation and commissioning; the client procured the installation and maintenance tools.
Testwork and Expansion Design: Xinhai conducted mineral processing testwork on the gold ore and designed the expansion across the grinding, gravity separation, carbon-in-leach and tailings dry stacking systems, covering the mineral processing, civil, electrical, general layout and water supply and drainage disciplines.
Phased Drawing Delivery: Foundation drawings for the leaching plant and thickeners were released first so that civil works could start ahead of the full drawing set, shortening the overall construction schedule of the expansion.
Grinding and Gravity Circuit Upgrade: The grinding workshop was expanded to feed the increased throughput, and the gravity separation circuit was upgraded to recover coarse gold ahead of leaching.
Carbon-in-Leach Expansion: The CIL system was expanded to treat the higher ore tonnage, with the leaching capacity scaled to match the new design feed rate.
New Desorption Electrolysis and Carbon Regeneration: A new desorption electrolysis system with 2,000 kg capacity per batch, together with carbon acid-washing and regeneration facilities, was added to convert loaded carbon into doré on site.
Tailings Dry Stacking: Tailings dewatering for dry disposal was included in the expansion, reducing tailings storage risk and allowing process water to be returned to the plant.
Design started after the contract took effect in June 2021, with the full drawing set completed in August 2021. Xinhai-supplied gravity and CIL equipment was shipped from October 2021 and installed under Xinhai's guidance, and the expanded plant runs the gravity separation and CIL circuits in series to produce doré on site, lifting throughput from the original 240 t/d to a design capacity of 1,000 t/d.
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