The invention relates to the technical field of mineral
resource recovery and environment-friendly
beneficiation, and discloses a method for recovering
phosphorite from micro-fine fraction
tailings, which comprises the following steps: grading by a
cyclone: micro-fine fraction ore pulp is introduced into the
cyclone for grading, an overflow product enters an overflow
pipe, and a sand setting product enters a subsequent desulfurization flotation process; carrying out
copper-
sulfur separation flotation: carrying out
dehydration treatment on the crude
copper concentrate obtained after desulfurization, and then entering a
copper-
sulfur separation flotation process to separate out copper
fine powder and
sulfur fine powder; the desulfurized minerals enter the micro-fine particle grade
phosphorus selection process, the flotation process of one-roughing, one-sweeping and four-concentrating is adopted, and
phosphorus concentrate is selected. According to the method, high-efficiency purification of copper and sulfur concentrates is achieved and tailing
pollution is reduced through concentration classification of a
cyclone,
impurity removal of an inclined plate, desulfurization flotation and copper-sulfur separation flotation, in the
phosphorite recycling process, the flotation process of one-time roughing, one-time sweeping and four-time concentration is adopted,
automatic control equipment is arranged, and the recycling rate and purity of the
phosphate concentrates are remarkably improved.