[Process introduction]:The magnetite beneficiation method occupies a dominant position in iron ore separation. Xingaonai uses gravity separation, magnetic separation, flotation and roasting magnetic separation, as well as combined processes for weakly magnetic lean iron ore; for strong magnetic iron ore, it directly Processed by magnetic separation.
[Application areas]:The magnetite beneficiation process can be applied to a single magnetite ore with simple ore properties.
According to the magnetic strength of the ore, an ore beneficiation process method that adapts to its properties is selected. The magnetic separation process is used as the main process method, and the combination of gravity separation, flotation, roasting magnetic separation, etc. is a combined process method. The ore selection and separation has a basis.
It is mainly used to select low-grade magnetite. Since the ore has strong magnetism and is easy to grind and select, current-stage grinding is mostly used for coarse-grained magnetite, and multi-stage grinding process is used on the contrary. Currently, xingaonai promotes The fine grinding technology can increase the concentrate grade from 61% to about 67%.
After magnetization and roasting, weak magnetic minerals can be sorted using the same method as strong magnetic minerals.
In the two-stage grinding, stage separation, and single weak magnetic separation process, a regrinding and reselection process on a fine screen is added, which can separate the fine-grained minerals that have reached monomer dissociation in a timely manner and reduce the occurrence of over-grinding. , improved processing capacity, and at the same time, the concentrate grade can be increased by about 2%.
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