What six gold ore beneficiation processes target specific mineralization types?

2025-10-12

Gold ore beneficiation processes are tailored to the specific mineralization types present in the ore. Below are six common beneficiation processes that target specific types of gold mineralization:

1. गुरुत्वाकर्षण अलगाव:

   • Target: Free-milling gold (coarse or alluvial gold particles).
   • प्रक्रिया: Exploits the difference in density between gold and gangue minerals. Techniques include sluices, jigs, shaking tables, and centrifugal concentrators like Knelson or Falcon concentrators.

2. फ्लोटेशन:

   • Target: Sulfide-hosted gold (e.g., gold associated with arsenopyrite, pyrite, chalcopyrite).
   • प्रक्रिया: Involves the use of chemicals (collectors, frothers, depressants) to selectively adhere and separate sulfide minerals containing gold into a froth concentrate.

3. साइनाइडेशन:

   • Target: Fine-grained, free gold and gold encapsulated in oxidized minerals.
   • प्रक्रिया: Dissolution of gold using cyanide solutions, followed by recovery with activated carbon (CIL/CIP processes) or zinc precipitation (Merrill-Crowe).

4. जैव-लीचिंग:

   • Target: Refractory sulfide ores where gold is locked in sulfide minerals.
   • प्रक्रिया: Uses microorganisms (e.g., एसिडिथियोबैसिलस फेरोऑक्सीडेंस) to oxidize sulfides, releasing gold for subsequent cyanidation.

5. Roasting or Pressure Oxidation (POX):

   • Target: Double-refractory ores (gold locked in sulfides and/or carbonaceous materials that "preg-robb").
   • प्रक्रिया: Involves high-temperature oxidation or pressurized environments to break down sulfides and organic matter, making gold accessible for cyanidation.

6. संलयन:

   • Target: Free gold, particularly from artisanal and small-scale mining (though environmentally hazardous).
   • प्रक्रिया: Uses mercury to bind with gold, forming an amalgam that is later heated to recover gold. (Note: Mercury usage is heavily discouraged due to severe environmental and health hazards.)

Each of these processes is applicable depending on the mineralogical and geological characteristics of the gold ore and the economic considerations of the mining operation. Often, a combination of these methods is used for optimized gold recovery.

प्रोमिनर (शंघाई) माइनिंग टेक्नोलॉजी कं., लिमिटेड, वैश्विक स्तर पर पूर्ण खनिज प्रसंस्करण और उन्नत सामग्री समाधान प्रदान करने में विशेषज्ञता रखती है। हमारा मुख्य ध्यान निम्नलिखित पर केंद्रित है: सोने की प्रक्रिया, लिथियम अयस्क का लाभ उठाना, औद्योगिक खनिज। एनोड सामग्री उत्पादन और ग्रेफाइट प्रसंस्करण में विशेषज्ञता।

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