The invention discloses a method and a
system for manufacturing cooled
slag-making
pellets from steel
plant dedusting ash or steel
plant sludge. The preparation method comprises the following steps: 1), preparing the steel
plant dedusting ash or the steel plant
sludge; 2), in accordance with the
mass ratio, weighting raw materials of 75-85% of the steel plant dedusting ash and / or the steel plant
sludge, 10-20% of
iron oxide scales and 2-15% of
bentonite, and mixing evenly; 3), fine blending the mixture with water, and carrying out ball pressing and molding into
pellets; 4), sending the prepared
pellets into a closed still kettle, directly introducing steam, carrying out steam curing heating on the pellets, and allowing to generate a steam curing reaction, wherein a steam curing medium is water steam, the steam curing pressure is 0.05-1.4 MPa, the water
steam temperature is 105 DEG-195 DEG C, and the steam
curing time is 0.5-2 h; and 5), carrying out dust separation and screening on the product after steam curing, and thus finally obtaining the finished product. The cooled pellets are prepared by the method, so that the energy can be saved, the production equipment investment and the production cost are reduced, the
production cycle is shortened, and the product quality is improved.