Panzhihua Iron Mine Midi Concentrator (1)

Midi beneficiation plant by the Changsha Design and Research Institute of black metallurgy mine designed in 1965 and part of 1970 put into operation, designed annual ore processing 13.5 million t / a.
(1) The nature of the ore: Panzhihua iron ore mine magnetic metal V-Ti magma deposits, ore production in the body rocks in gabbro. The ore structure is mainly divided into three types: sponge ferroniobium structure, granular mosaic structure, literary image and literary image structure. Ore structure: rich ore (TFe≥45%) is dense block and quasi-block structure; medium ore (TFe=30~45%) is quasi-blocky and dense disseminated structure; lean ore (TFe=20~30%) Most of them are sparsely disseminated structures; the surface minerals (TFe=15~20%) are mainly scattered and disseminated.
The main metal minerals are titanium magnetite, ilmenite, and a small amount of hematite, limonite, goethite and secondary magnetite. Sulfides mainly pyrrhotite, while a small amount of cobalt pentlandite, cobaltite sulfur, sulfur nickel and cobalt ore, copper ore and yellow ink copper. Titanium gangue minerals pyroxene, plagioclase, followed olivine, titanium amphibole, while a small amount of chlorite, serpentine, sericite, zoisite, biotite, garnet sub-stone, apatite, calcite.
The multi-element analysis of various grades of ore in the Panzhihua mining area and the minerals of each grade ore are shown in the following table:

Inlay size and characteristics of major minerals:
1) titanium having ferromagnetic magnetite, which is a complex mineral magnetite, ilmenite spar, aluminum magnesium spinel and a small amount of ilmenite platelets composition, wherein the body is magnetite. The content, particle size and self-formation degree of titanomagnetite in ore vary significantly with the grade of ore. The general situation is that the content from rich to lean is gradually reduced, the particle size is thinner, and the degree of self-formation is reduced. In the rich ore and medium ore, it is generally self-shaped and semi-self-shaped, with a particle size of 0.5 ~ 1.5mm, and the larger one can reach 3mm; while in the lean ore, off-balance minerals and rocks, it is mostly irregular, the largest grain. The diameter is 1.5mm, generally 0.1~1.0mm. In the eutectic rock ore, the particles are significantly thicker.
2) The output form of ilmenite is granular, platelet-shaped and irregular, and the former is the main one. Granular ilmenite is generally semi-automorphic, distributed between oxides and silicate minerals, generally having a particle size of 0.1 to 1.0 mm; both flaky and irregular ilmenite are present in the titanium magnetite ore. The lamellae width is generally 0.005 to 0.01 mm. Therefore, the titanium concentrate selected by the mechanical beneficiation method is mainly granular ilmenite.
3) Sulfide minerals are commonly found in ores. Pyrrhotite is the main sulfide mineral, its particles are impregnated with cloth, and the particle size is 0.1~0.5mm. Nickel pyrite is the main mineral containing Ni and Co. It is widely distributed and mainly occurs in pyrrhotite. Generally, it is self-shaped or semi-self-shaped, and the particle size is 0.01 ~ 0.03mm; the sulphur-cobalt ore is a cobalt-containing mineral, all of which are present in the pyrrhotite, all of which are fine particles with a particle size of about 0.005 mm.
4) The silicate minerals in the ore mainly include plagioclase and titanium ordinary pyroxene. The former has a particle size of about 0.2 mm and the latter has a diameter of 0.05 to 5 mm. The second is amphibole with a particle size of 0.05 to 0.2 mm. The particle size is 0.1 to 0.25 mm.
The ore has a Platt hardness of 10 to 16. The ore density is 3.4t/m ³ .

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