Method for concentrating extremely low-grade refractory magnetite
A magnetite and grade technology, applied in chemical instruments and methods, magnetic separation, wet separation, etc., can solve the problems of high iron ore yield, high ore hardness, and low beneficiation cost, so as to reduce the beneficiation ratio, Improve the recovery rate and reduce the effect of beneficiation energy consumption
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[0024] A kind of beneficiation method of extremely low-grade refractory magnetite, comprises the following steps:
[0025] (1) The extremely low-grade 450-0mm magnetite with fine-grained impregnated cloth is coarsely crushed underground by a jaw crusher. The bulk magnetic separator dry selects waste, and the 200-0mm product enters the standard cone crusher for secondary crushing;
[0026] (2) After secondary crushing, the products are discarded through dry selection of magnetic pulleys, and the discarded products are then secondary crushed. After secondary crushing, they are screened, and the products on the sieve larger than 25mm are returned to secondary crushing, and the products under the 25-0mm sieve enter High-pressure roller mill for closed-circuit fine crushing;
[0027] (3) Finely crushed and then sieved, the sieved products larger than 4mm are returned to finely crushed, and the 4-0mm sieved products enter the permanent magnetic powder ore dry magnetic separator for...
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