A sorting process for surface skarn-type hematite

Abstract

The invention relates to a separation technology of ground surface skarn type hematite. The technology is characterized by comprising coarse breaking work, ore washing desliming and dry and wet separation work, medium breaking work, wet type screening work and continuous two-segment water removal and grading work. According to the technology, grade of raw ore with 53 to 55% iron grade can be improved to 58% successfully without grinding and separation, the comprehensive concentrate recycling rate can reach 73 to 77%, the comprehensive iron recovery rate is much higher than the 70% recovery rate of traditional hematite mineral separation, the good mineral separation index is obtained, and in order to obtain the higher earnings, the guarantee is provided. The raw ore is subject to effectivedesliming, the slurry blockage problem can be solved, and two kinds of produced raw materials of smelting and sintering ores can be directly transported outwards.

Description

technical field

[0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a process for separating surface skarn-type hematite. Background technique

[0002] As an important type of hematite, skarn-type hematite is widely distributed, such as the Meishan iron ore in my country, the iron ore in Jiayuguan area, and the Tang Kerili iron ore in Sierra Leone in West Africa. The characteristics of this type of ore are: complex mineral composition, mainly including hematite, false hematite, limonite and goethite; minerals are mainly distributed on the surface, weathering and erosion takes a long time, and mudification is relatively serious. In some areas, such as the Tangkerili Iron Mine in Sierra Leone, the surface skarn-type hematite grade is relatively high, generally reaching 53% to 55%. Magnetic-strong magnetic-gravity separation-flotation and other processes, the investment, energy consumption, operation and other mineral processing cost...

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