The invention belongs to the technical field of
continuous casting machine production, and particularly discloses a flow reducing and yield increasing method for a multi-billet
continuous casting machine, which comprises the following steps: adjusting the amount of
molten steel generated in a converter: reducing the amount of
molten steel tapping from 165 t to 140 t, and shortening the pouring period from 83 min to 73 min; flow blocking is formulated according to the pouring condition of the
tundish; a
continuous casting machine flow channel is divided into a pouring mode of two flow rectangular billets + four flow square billets and a pouring mode of two flow rectangular billets + three flow square billets; controlling the pulling speed of the steel billet: setting different pouring stages, and adjusting the pore sizes of the sliding blocks of the rectangular billet and the square billet according to the corresponding pouring stages, so as to control the pulling speed of the steel billet; and adjusting the pouring flow of the steel
ladle: adjusting the amount of
molten steel poured into the
tundish by the steel
ladle according to the pulling speed of the steel billet. The problems of square billet redundancy and resource waste generated by an original eight-machine eight-flow continuous
casting machine are solved by adjusting the molten steel tapping amount, the pouring
flow number and the sliding block hole
diameter and controlling the
flow number and the
ton number of square billets, and the proportion of the square billet production
ton number and the rectangular billet production
ton number in the total amount is gradually balanced.