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Flotation method of copper oxide ore

2023-08-30 Xinhai (50)

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The industrial treatment of copper oxide ore mainly adopts flotation method, among which malachite, red copper ore and azurite with strong buoyancy are the ones with strong buoyancy, and gall alum and malachite with poor buoyancy.

There are many types of copper oxide ore, high oxidation rate and caking rate, fine mineral particle size and uneven distribution, strong hydrophilicity, high mud content, and many associated components. These properties increase the separation of copper oxide ores. difficulty. Among them, the type and system of flotation agents have a great influence on the copper oxide flotation effect of copper oxide ore. The copper oxide flotation method using different reagents will be introduced below.

01 Fatty acid flotation method

The fatty acid flotation method uses fatty acids and soaps as collectors for flotation, and is mainly suitable for the separation of copper oxide ores with malachite as the main copper-containing mineral and silicate as the main gangue mineral. In the actual production of beneficiation, the commonly used collectors are C 10 -C 20 saturated and unsaturated fatty acids. At the same time, add inhibitors, phosphate, water glass, etc. to the pulp, and use sodium carbonate as a regulator.

02 Amine flotation method

The reagents used in the amine flotation method are organic amines, and the applicable minerals mainly include malachite and azurite. Organic amine reagents have strong collection capacity and fast flotation speed, and their price is higher than that of xanthate, resulting in higher beneficiation costs. Commonly used amine collectors are cocoamine and laurylamine. Amine collectors can collect gangue minerals in copper oxide ore. In order to obtain a better copper oxide flotation effect, the choice of gangue mineral inhibitor is also very important. Sodium alginate, polyacrylic acid, cellulose lignosulfonate or lignosulfonate, etc. can be used.

03 Chelating agent flotation method

The chelating agent flotation method mainly uses chelating collectors or neutral oil for flotation, and the applicable minerals are mainly refractory copper oxide ores such as chrysocolla. The chelating collector has strong collection ability and good selectivity, and can combine with metal ions on the mineral surface to form a hydrophobic chelate, and then co-adsorb with hydrocarbon chain neutral oils to increase hydrophobicity and obtain better flotation Effect. At the same time, the dosage of medication can also be reduced. Commonly used chelating collectors include imidazole, hydroxamic acid, etc., but the price of chelating collectors is relatively high, and the cost of beneficiation should be considered when using them.

04 Emulsion flotation method

The emulsion flotation method first sulfurizes the copper ore, and then adds a copper complexing agent to form a stable hydrophobic film on the surface of the mineral. Neutral oil emulsion is added to the slurry to wrap the mineral surface, and the hydrophobicity of the copper mineral is increased. The adhesion between copper minerals and bubbles increases and they float with the bubbles. This method is mainly suitable for flotation of copper oxide ore, sulfide ore and non-sulfide ore mixed ore. Commonly used copper complexing agents include diphenylguanidine, mercaptobenzoxazole, toluoyltriazole, benzotriazole, etc. Neutral oil can be kerosene, gasoline, diesel, etc. When using this method to flotate copper oxide ore,

05 Sulfide flotation method

The sulfide flotation method presulfides the copper oxide ore, and the highly hydrophilic copper oxide mineral adsorbs S 2- or HS - ions, forming a sulfide film on the surface of the mineral to increase hydrophobicity, and then adding a collector to the slurry flotation. Sulfide flotation is one of the commonly used methods for beneficiation of copper oxide minerals. The applicable minerals are carbonate-containing copper oxide ores, such as malachite, cuprite, azurite, etc. If sulfide flotation is used to treat specific types of ores, the key to the process is to choose the appropriate reagent and reagent usage plan.

The above are copper oxide flotation technologies with different flotation reagents, and their applicable ore types are also different. In order to choose a suitable copper oxide beneficiation process, the characteristics of the ore itself should be understood.

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