(1) Mineral composition and beneficiation method of copper sulfide nickel ore Such common metal ore minerals: pyrrhotite, pentlandite and chalcopyrite, in addition to magnetite, pyrite, titanium, iron, chromium iron, copper ink, blue copper, chalcocite, bornite, and platinum group minerals; gangue minerals are: olivine, pyroxenes, plagioclase feldspar, talc, serpentine, chlorite, and mica stone from the sun, and sometimes silica and carbon Acid salt, etc. Copper in copper-nickel ore mainly exists in the form of chalcopyrite; while nickel is mainly in the form of free nickel sulfide such as pentlandite, sulphur-nickel ore, and sulphur-nickel-iron ore, and a considerable part of nickel is present as a homogeneous image. In the pyrrhotite, there is also a small amount of nickel silicate. The most suitable method for the beneficiation of copper-copper-nickel ore is flotation, and magnetic separation and re-election is usually an auxiliary beneficiation method. (2) The floatability of main nickel minerals and the flotation characteristics of copper-nickel ore Nickel pyrite, sulphur nickel ore and nickel-containing pyrrhotite can be effectively floated by high-grade xanthate such as butyl or pentyl. The floatability of pentlandite and needle sulphur nickel ore is between chalcopyrite and pyrrhotite. Nickel pyrite can obtain better flotation in weakly acidic, weakly alkaline or neutral medium; needle sulfur nickel ore can also be better floated in butyl yellow drug in weakly acidic, neutral or weakly alkaline medium. Nickel-containing pyrrhotite is suitable for flotation in acidic or weakly acidic media, but the flotation rate is slower. Nickel pyrite, sulphur nickel ore and nickel-bearing pyrrhotite can be suppressed by lime, but to varying degrees. Pyrrhotite is easier to suppress, while inhibition of pentlandite and needle sulphur nickel ore requires excess lime. Unlike pyrrhotite and pyrite, other bases do not inhibit pentlandite and sulphur nickel ore. Separation of nickel-pyrite and chalcopyrite by lime alone is not good enough, usually with a small amount of cyanide to suppress pentlandite. Nickel pyrite can be oxidized faster by oxygen in the air, and an iron hydroxide film is formed on the surface thereof, and the floatability is lowered. The pyrrhotite is oxidized faster in the air than the pentlandite. Copper sulphate is a nickel pyrite, especially an activator of pyrrhotite. After the nickel mineral is inhibited by lime (rather than by the oxide), it can be reactivated with copper sulfate. In order to improve the activation of nickel minerals by copper sulfate, it is sometimes necessary to add a small amount of sodium sulfide in advance. Nickel silicate minerals are currently not selected by industrial flotation. Therefore, the amount of nickel silicate in the ore is an important factor affecting the recovery rate of nickel. Based on the properties of copper-nickel ore, the flotation process has the following characteristics: the flotation process is simpler, the flotation time is longer, the number of selections is less, the concentrate is more dispersed, and the nickel minerals are recovered as early as possible; the nickel concentrate grade is generally It is 4~8%, and the highest is 13~15%. Removal of pyrrhotite and talc, chlorite, actinolite, serpentine, mica and other easy-floating gangue are the key to improving the quality of nickel concentrate; in order to strengthen the flotation of nickel minerals, mixed collectors are often used; In order to remove pyrrhotite, a combined flotation and magnetic separation process is often employed. (3) Flotation process of copper-nickel ore When flotation of copper-nickel ore, a collector and a foaming agent for flotation of copper sulfide minerals are often used. One of the basic principles for determining the flotation process is to allow copper to enter the nickel concentrate while avoiding nickel from entering the copper concentrate. Because the nickel in the copper concentrate loses a lot during the smelting process, the copper in the nickel concentrate can be recovered more completely. Copper-nickel ore flotation has the following four basic processes: (4) Direct priority flotation or partial priority flotation process When the ore contains copper much higher than the nickel content, the copper can be selected as a separate concentrate. The advantage of this process is that copper concentrates with lower nickel content can be obtained directly. Others Concrete Vibrator,Handy Concrete Vibrator,Internal Concrete Vibrator,Concrete Vibration Machine NINGBO MAX MACHINERY CO.,LTD , https://www.max-machinery.com
Copper-nickel ore beneficiation method
Most of this type of ore is magma-dispersed copper- nickel ore, in which rich ore containing more than 3% of nickel can be directly smelted; ore containing less than 3% of nickel needs beneficiation .