The invention discloses a preparation method of high-carbon metallized
pellets for
electric arc furnace
smelting. The preparation method comprises the steps that carbon-containing
powder is added intoiron concentrate for material preparation according to the
mass ratio of carbon to iron of 1.5-2:1, prereduction is carried out at a reduction temperature of 1000-1300 DEG C for 40-60min, the reduction product is ground to 0.4-0.5 mm
granularity, 4-6% of a binding agent and 9-12% of water are added, the mixture is mixed evenly, pressed into
pellets and dried at the temperature of 120-140 DEG C for 60-90min, the high-carbon metallized
pellets are obtained, and the pellets can reach the falling strength of 3-4 and reach the density of 2.6-3.3g / cm<3>.
Molten steel can be stably and efficiently recarburized by the pellets below the
slag-steel interface, the problems that the density of conventional carburant is insufficient, the carburant rapidly floats on the surface of furnace
slag after being added, and the
carburizing effect is poor are solved, meanwhile, the pellets can perform a good carbon-
oxygen reaction below the
slag-steel interface to remove inclusions and gas, formation of a large amount of foam slag is promoted,
electric arc is stabilized,
smelting time is shortened, iron loss is effectively reduced, steel
material consumption is remarkably reduced, the
metal yield is improved, and the
smelting cost is reduced.