Separation process for magnetic red mixed ore based on iron material disseminated particle size treatment

Abstract

The invention relates to a separation process for magnetic red mixed ore based on iron material disseminated particle size treatment. The process comprises the operation of feeding the mixed ore withthe grade of 27%-29% and with magnetite as a main raw material into first-section closed circuit ore grinding operation to obtain a primary grading overflow product, and is characterized by further comprising first-section weak magnetic and strong magnetic operation, fine screening operation, first-section magnetic separation and first-section washing magnetic separation operation, second-sectionclosed circuits ore grinding operation, second-section weak magnetic strong magnetic operation, second-section magnetic separation and washing magnetic separation operation, third-section closed circuit ore grinding, third-section weak magnetic strong magnetic operation and reverse flotation operation. The final concentrate with the grade of 66%-66.5% is obtained through the operation. Compared with the prior art, the separation process has the advantages that 1) an efficient separation process which is characterized in that the concentrate can be obtained once dissociation is achieved and segmented ore grinding, segmented concentrate taking and segmented tailings discharging are achieved is provided for the magnetic red mixed ore with the non-uniform iron material disseminated particle sizes, so that overgrinding is reduced, and energy conservation and consumption reduction are achieved; 2) magnetic separation equipment is adopted for upgrading, and three sections of ore grinding is carried out by adopting vertical mills; and 3) the process is simple in structure, free of middling circulation, easy to implement on site and easy to produce and manage.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a sorting process for treating magnetic-red mixed ore based on iron mineral embedding particle size. Background technique [0002] A magnetic red mixed ore with high magnetic iron content (magnetite content accounts for more than 70% of its iron mineral content), its iron minerals are mainly magnetite, red limonite, iron carbonate, iron silicate content The gangue minerals are mainly quartz, and the contents of harmful impurities such as sulfur and phosphorus are relatively low. The particle size of the iron minerals embedded in the magnetic red mixed ore is basically inhomogeneous. The research on the process mineralogy properties of the magnetic-red mixed ore shows that the mixed ore is an ore with uneven distribution of iron minerals, first of all, the distribution of magnetic minerals is uneven in size, and the average distribution of magnetite is 52 μ...

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Problems solved by technology

The method of weak magnetic field-fine sieve-weak magnetic field is also aimed at improving the quality of fine-grained embedded magnetite, while the gravity separation method takes up a lot of equipment space, low separation efficiency and middle ore circulation, and the process is not easy to control In addition, a large amount of magnetite medium ore in these "stage grinding-magnetic, gravity, and flotation combined processes" still needs to be finely ground and combined with red limonite to be separated by gravity separation or flotation. Gravity separation is not The best choice for sorting magnetic ore, and the high content of this part of magnetic ore is put into flotation, which not only increases the amount of flotation treatment ore, causes an increase in the amount of flotation reagents, increases the cost of sorting, but also increases chemical pollution

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