The production line is designed to be 15000tpd, and the capacity can reach 20000tpd after expansion.
1.Mineral properties
The ore of the plant include four types, including magnetite quartzite, pyroxene magnetite quartzite, magnetite pyroxene quartzite, hematite magnetite quartzite, and magnetite quartzite. The iron minerals in the ore are mainly magnetite, followed by false hematite. Gangue minerals are mainly quartz, diopside, hypersthene, followed by a variety of garnet, amphibole, biotite, in addition to a small amount of apatite, zircon, spinel and carbonate minerals.
The ore was changing crystal structure, in black belt in medium and coarse grained, the 2-0.3mm level accounted for about 50%, accounted for more than 0.074mm grade 80-90%; martite most of more than 0.07 mm; diopside particle size is 0.2-0.15mm, a subhedral crystal; hypersthene is fine granular particle size were between 0.3-0.5mm, wide plate like size up to 2-3mm; light colored bands of quartz particle size is 0.2-0.5mm, a zigzag shaped mosaic.
The ore structure is mainly banded and coarse stripe, and the oxide ore is mostly distributed near the surface of the surface oxidation zone and the fracture zone of the ore body. With the change of mining depth, the amount of oxidized ore is decreasing. The chemical composition of the ore is mainly iron and silicon, the content of the harmful impurity is very low, the iron grade is between 24-32%, and the average is 26.71%. The ore multi element analysis is shown in Table 1. The mineral composition of the ore is shown in Table 2. The result of the determination of the degree of monomer dissociation of minerals is shown in Table 3.
Table 1. ore multi element analysis
Table 2. mineral composition of the ore
Table 3. The degree of monomer dissociation of minerals
The hardness of the ore is 12-14, the rock hardness is 8-10, the mineral density is 3.1-3.2t/m3, and the density of the rock is 2.7t/m3. The loose coefficient of ore and rock is 1.5. The humidity of the ore is generally 0.1-0.2%, and the maximum is 0.38%.
2.Technical processing of 20000tpd iron ore beneficiation plant
The crushing and screen processing is shown in Figure 1, and the beneficiation processing is shown in figure 2.
Figure1. crushing and screen flowchart
Figure2. beneficiation processing flowchart
3.Main equipments of 20000tpd iron ore beneficiation plant
The equipment used in this plant is like table 4.
Table 4.Main equipments list
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