The invention relates to a mineral
separation process for magnetic
hematite rough concentrates, which comprises the following steps of: feeding the magnetic
hematite rough concentrates into a
closed circuit grinding system; once grading, overflowing and feeding into weak
magnetism at first section; feeding the concentrates in the weak
magnetism at the first section into a
dewatering tank; feedingthe concentrates in the
dewatering tank into a fine
sieve; returning rough particle products on the
sieve into the first section for
grinding; feeding fine particle products under the
sieve into weakmagnetism at second section; mixing
tailings in the weak
magnetism at the second section,
tailings in the weak magnetism at the first section and
tailings in the
dewatering tank to obtain low intensity
magnetic separation tailings; concentrating the low intensity
magnetic separation tailings by a concentrating
machine; feeding into a
closed circuit regrinding
system; grading, overflowing and feeding again into strong magnetism; concentrating strong magnetic concentrates by the concentrating
machine; feeding into a negative
ion reverse flotation process including one-time rough separation, one-time fine separation and three-time
scavenging; combining the strong magnetic tailings with the floatation tailings to obtain final tailings; and combining the concentrates in the weak magnetism at the second section with the flotation concentrates to obtain final concentrates. The mineral
separation process provided by the invention is simple, high-efficiency, particularly low-cost, good in effect and high in concentrate quality and
metal recovery rate, and realizes high-efficiency utilization of resources.