Comprehensive utilization method of low-grade large-flake graphite ore

The invention discloses a comprehensive utilization method of low-grade large-flake graphite ore, and relates to the field of comprehensive utilization of graphite ore. The comprehensive utilization method of the low-grade large-flake graphite ore comprises the steps that large-flake graphite raw ore is crushed, coarsely ground and graded, a collecting agent kerosene and a foaming agent terpenic oil are added in the ore grinding process, graded return sand enters a sand washing process to obtain a coarse sand product, sand washing liquid in the sand washing process enters a flotation process to participate in the flotation process, and the flotation process is completed. The flotation process comprises one-time roughing, five-time regrinding, six-time concentration, one-time scavenging and two-time scavenging. According to the comprehensive utilization method for the low-grade large-flake graphite ore, the large-flake graphite ore can be effectively pre-enriched, the treatment capacity of a mill is increased,