Gold processing in the DRC largely falls into two distinct categories: Artisanal and Small-Scale Mining (ASM) and Large-Scale Industrial Mining. The extraction and processing methods vary significantly between the two, as well as the supply chain networks.

1. Artisanal and Small-Scale Mining (ASM)
The vast majority of gold in eastern DRC is produced by artisanal miners.
  • Excavation: Miners dig tunnels or pan riverbeds (alluvial) to extract gold-bearing gravel and rock.
  • Crushing & Milling: The extracted rocks are crushed using rudimentary tools or small, mechanized ball mills to create a fine powder.
  • Concentration: The powder is washed, and the heavy gold particles are separated using sluice boxes and centrifugal concentrators.
  • Extraction (Amalgamation): Mercury is often mixed with the concentrated gold powder. The mercury bonds with the gold to create an amalgam. The mixture is then heated, burning off the toxic mercury fumes to leave behind raw, impure gold (often around 50–80% pure).
  • 2. Large-Scale Industrial Mining
    Industrial mining uses advanced mechanization and modern chemical processes to extract gold on a massive scale (e.g., the Kibali Gold Mine operated by Barrick)
  • Crushing & Grinding: Ore is passed through massive crushers and semi-autogenous (SAG) mills to reduce it to a fine slurry.
  • Carbon-In-Leach (CIL): The gold slurry is mixed with a cyanide solution, which dissolves the microscopic gold particles. Carbon is then added to absorb the dissolved gold.
  • Smelting: The gold is separated from the carbon and melted in high-temperature furnaces to cast large, standardized gold doré bars (typically containing over 90% gold).
    • 3. Processing, Refining, and Export
    Historically, almost all raw gold extracted in the DRC was exported in its semi-refined or raw state.
    Historical Smuggling: An estimated 1-2 billion worth of artisanal gold was historically smuggled out of the country through neighboring nations (e.g., Uganda and Rwanda) before being sent to refining hubs like Dubai.
    In-Country Refining: To combat this, the DRC government has partnered to launch its first pilot gold refinery in Kalemie (Tanganyika province). This facility has the capacity to refine 500-600 kg of gold per month, allowing the DRC to perform the final refining steps domestically and produce finished bullion bars for export.
    Could you tell me if you are looking to source gold ethically, or if you need more details about industrial vs. artisanal processing equipment? I can provide more specific data depending on your goal. Simply ask our 24hr AI assistant found in the right bottom corner or this website for more