The invention discloses a comprehensive utilization method of lead-
zinc ore waste rock. The comprehensive utilization method comprises the following steps: S1, crushing the lead-
zinc ore waste rock in advance, and finely
grinding the lead-
zinc ore waste rock to a certain particle size; s2, performing fine
grinding on the conventional flux in advance to a proper particle size; s3, the
iron ore concentrate is pretreated, so that the
iron ore concentrate has a certain specific surface area; s4, ore blending and uniform mixing are conducted on the pretreated
iron ore concentrate, a conventional flux, the lead-zinc ore waste rock obtained after fine
grinding and a binder according to the set MgO content and binary
alkalinity, a mixture is obtained, then water is added into the mixture in a disc pelletizer for
pelletizing, and green
pellets with the set
granularity are obtained; and S5, the green
pellets are loaded into special pellet production equipment,
drying, preheating,
roasting, soaking and cooling are conducted at the set air speed and temperature, and the finished product oxidized
pellets are obtained. Based on the characteristic that the main phase of
dolomite lead-zinc ore waste rock is
dolomite, the
dolomite lead-zinc ore waste rock is crushed and finely ground to serve as the
magnesium-containing flux to replace part of conventional metallurgical dolomite to prepare
magnesium pellets, and therefore recycling of valuable components such as
calcium and
magnesium in the waste rock is achieved.