Cyanide Leaching Solution for Sulfide Gold Ore
For gold mining and mineral processing enterprises, selecting the right separation method is crucial to maximize recovery and reduce operational costs.
Sulfide-type gold ore, where gold and pyrite are closely associated, requires precise beneficiation techniques. Through fine grinding and controlled cyanide leaching, gold can be efficiently extracted with recovery rates up to 95%.
As a leading gold processing equipment manufacturer and solution supplier in China, Dasen Mining provides customized, turnkey EPC services for sulfide gold ore treatment — from process design to installation and commissioning.
Characteristics of Sulfide-Type Gold Ore
- Composition: Gold and pyrite coexist, often finely disseminated.
- Ore grade threshold: Approximately 1 g/t; ores below this grade have limited economic feasibility.
- Acceptable impurity levels:
- Total sulfide < 2%
- Arsenic < 0.5%
Exceeding these levels increases reagent consumption and raises the cost of treating each ton of ore.
Best Separation Method — Cyanide Leaching Process
For this ore type, the cyanidation leach process is the most efficient and widely used method. After crushing and fine grinding, the slurry is leached with a weakly alkaline sodium cyanide solution, dissolving the gold into a soluble gold‑cyanide complex.
Typical Process Flow
- Crushing & Grinding – Liberate gold from pyrite.
- Cyanide Leaching – Dissolution of gold into solution.
- Gold Recovery – By activated carbon adsorption (CIP/CIL) or zinc‑powder precipitation (Merrill–Crowe).
- Desorption & Electrolysis – Gold is eluted from carbon and collected as gold mud.
- Smelting – Refining to produce bullion of high purity.
Average recovery rate: ≈ 95 %
Cyanide leaching remains the preferred solution for low‑sulfide, low‑arsenic gold ores because of its simplicity, reliability, and low processing cost.
Technical Advantages
- High gold recovery and short process cycle
- Suitable for oxidized or partially oxidized sulfide ores
- Stable chemical consumption and predictable operation cost
- Compatible with large‑scale and continuous production lines
Complete EPC / Turnkey Service from Dasen Mining
Dasen Mining is a professional gold processing manufacturer and supplier offering custom solutions and complete EPC projects for gold, copper, and other minerals.
Our core services include:
- Ore analysis and beneficiation testing
- Process design and equipment manufacturing
- Plant construction and on‑site installation
- Commissioning, operation, and technical training
With experienced mechanical engineers, beneficiation specialists, and a dedicated installation team, we provide reliable custom gold processing systems designed to deliver long‑term performance and cost reduction.
Whether you’re planning a new gold processing plant or upgrading an existing line, Dasen Mining offers customized gold ore separation solutions optimized for your ore characteristics and production goals.
Contact us today to discuss a tailored CIP / CIL cyanidation system or to schedule a factory visit in China — discover how our expert team can help you achieve maximum recovery with minimum cost.
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