Iron ore separation process

Iron ore dressing process mainly consists of:
1, Crushing is three sections and a closed-circuit process and mainly refers to primary crushing, secondary crushing and tertiary crushing, with jaw crusher, cone crusher and impact crusher. Moreover, there are auxiliary equipments which can connect the links, such as feeding machine, vibrating screen and belt conveyor.
2, Ore grinding: It is to say that sending the crushed materials after primary crushing into grinding mill. The materials are grinded into certain fineness then go through the third link.
3, Flotation flow.

 At present, pyrometallurgy is the main method for copper and nickel sulfide ore dressing. So does the Jinchuan nickel ore. The basic process is that: materials preparation(roasting)—smelting— converting—refining( electrolysis). High nickel matte flotation separation technology is adopted because the pyrometallurgy belongs to serpentine type ore and that the copper and nickel minerals closely embedded with each other and that mechanical processing method has difficulty in copper and nickel separation. Through the melting of converter, the mixed copper and nickel concentrate becomes the high nickel matte. Then through crushing, grinding float process and electrolysis, the high nickel matte becomes the final product---electrolytic nickel.

Nickel ore dressing method

The flotation is the main method among the copper sulfide nickel ore dressing methods. Magnetic separation and gravity separation are auxiliary mineral dressing methods. When flotation the copper sulfide nickel ore, collecting agent and blowing agent of sulfide ore flotation are often adopted. A basic principle in determining the flotation flow is that rather the copper comes into the nickel concentrate than the nickel comes into the copper concentrate. Because the nickel in copper concentrate will lose much in smelting process and the copper in nickel concentrate can be recycled fully.

There are four basic processing for copper and nickel ore flotation:

Direct selective flotation or part selective flotation processing. When the copper content is higher than the nickel content in the ore, the selective flotation can be used to flotation the copper into concentrates. The advantage of this processing is that the copper concentrates have lower nickel content.

Mixing floatation process: This process is used for the ore which the copper content is lower than nickel. The copper and nickel mixed concentrate is directly smelt into high nickel matte.

Mixing-selective flotation processing: The mixing flotation is used to flotation the copper and nickel. Then the copper concentrate with low nickel and the nickel concentrate with copper are selected from the mixing concentrates. After smelted, the high nickel matte can be got and then goes through the flotation.

Iron ore separation process

Mixing-selective flotation processing and recovering some nickel from mixing floatation tailings. This process is suitable for the ores which nickel minerals have different flotability. After copper and nickel mixing flotation, the tailings go through the further recovery to get the nickel minerals whose flotability is not so good.

Introductory remarks

In the earth, the content of nickel is rowed in fifth, just after silicon, oxygen, iron, magnesium. The nickel features with good mechanical strength, ductility, infusibility, thermostability and high chemical stability.

The uses of nickel ores

There are about 50 kinds of nickel minerals. The main 10 kinds of nickel minerals are listed in the table below. The sulfides, such as pentlandite and violarite exist in free vulcanization nickel form and a number of nickel are stored in magnetic pyrite.
Nickel ore dressing plays a very important role. With the rapid development of industrial technology, the demand for nickel is more and more, such as electrical industry, machinery industry, construction and chemical industry.

1. Metal materials.
3、As catalyst in the hydrogenated process of oil chemical.
4、Chemical power, the materials for battery making.
5、Pigment and dye making.
6、Ceramic and ferritic making.


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