Manufacturing method for cold-pressed pellets for steelmaking

A manufacturing method for cold-pressed pellets for steelmaking comprises the manufacturing technological steps that (1) steelmaking secondary fly ash, converter mud and oxide scale are mixed in advance with the weight ratio of (20-23):(55-65):(10-20), and evenly stirred into a mixture; (2) a binder is prepared through water-soluble sodium carboxymethycellulose and industrial effluent at the weight ratio of 1:(15-50) for standby application; (3) a magnesium chloride solution is prepared by magnesium chloride hexahydrate and water at the weight ratio of 1:1 for standby application; (4) 3%-5% of binder and 0.5%-1.5% of magnesium chloride solution are added in the mixture, mixing is carried out by an edge runner mill for 100-150 s, and a pellet material is made; (5) the pellet material is put into a ball press machine to achieve cold-press formation, the diameter of the pellets is 45-55 mm*30-40 mm *20-30 mm, and the pellets are naturally stacked and aired. The cold-pressed pellets manufactured through the method have the advantages that the pellet forming rate is high, the bonding strength is large, the drying time is short after pellet formation, and use for steelmaking is convenient.