How to extract gold from native gold mines?
Before refining the native gold ore, pretreatment is required, mainly to crush the large ore into fine particles, usually requiring -200 mesh (i.e., particle diameter less than 0.074 mm) to account for about 60%-80%, to ensure that the gold minerals are fully dissociated from other minerals, creating conditions for subsequent beneficiation and extraction operations. Then the refining is carried out, and the main methods are gravity separation, flotation, cyanidation and smelting.
Common Leaching Agents Used in Gold Ore Pretreatment
The purpose of using leaching agents in gold ore pretreatment is to induce chemical reactions between the agents and gold or other components in the ore, thereby disrupting the encapsulating structure of gold, liberating and dissolving gold into solution. This improves the efficiency and recovery rate of subsequent gold extraction.
Gold Ore Dressing Method: In-Depth Analysis of Cyanidation!
Cyanidation is the most widely used and highest recovery method in gold extraction, especially for refractory ores with fine gold particles or closely associated with gangue.
Gold Ore Beneficiation Method: In-Depth Analysis of Re-selection!
Gravity separation uses the density difference between gold and gangue minerals for separation. It is mainly used for the recovery of coarse or medium gold, especially suitable for placer gold and some quartz vein gold mines with high natural gold content.
Gold Ore Beneficiation Method: In-depth analysis of Flotation!
Flotation is to adjust the reagent system to make the surface of gold particles hydrophobic and attach to bubbles to achieve separation. It is applicable to sulfide gold ores or complex ores with gold and multiple metals coexisting.
How to choose the appropriate sulfide gold ore dressing process?
High sulfide gold ores often contain a large amount of pyrite, arsenopyrite and other sulfide minerals. The gold grade is usually low, and the gold particles are small and tightly wrapped by sulfide minerals, making it difficult to recover directly through the cyanidation method. For this type of gold ore, flotation technology is an economical and effective choice. Through flotation, gold can be enriched in copper, lead, sulfur and other concentrates, and then gold can be extracted from them, which not only improves the gold recovery rate, but also realizes the comprehensive utilization of multiple metals.
Antimony Oxide Beneficiation Process
The beneficiation process of antimony oxide needs to select a suitable method according to the properties of the ore (such as mineral composition, embedded particle size, associated impurities, etc.). The core process includes crushing and screening, gravity separation/flotation separation and tailings treatment.
Commonly Used Flotation Methods For Antimony Ore
Antimony is an important non-ferrous metal, widely used in flame retardants, alloy additives and electronic semiconductors. Flotation is a key technology to improve the grade and recovery rate of antimony concentrate. For different types of antimony ores, appropriate flotation processes need to be adopted.
How to solve the problem of uneven jaw crusher discharge
Jaw crusher is a key equipment in the ore coarse crushing process. It is widely used in various ores and rocks with a compressive strength not exceeding 320MPa with its excellent crushing capacity and high efficiency. However, in the actual production process, the jaw crusher may have uneven discharge particle size, affecting the crushing effect and subsequent process flow.