BATCH FURNACE FOR STEEL SHEET ROLLS ANNEALING Russian patent published in 2016 - IPC C21D9/673 

FIELD: metallurgy.

SUBSTANCE: batch furnace contains a support base for the roll, where its end face is located, supporting the roll in the vertical position, an internal cap surrounding the entire roll, installed on the support base for the roll, a cooling pipeline, that passes downwards from the top part of the internal cap in the cavity of the internal peripheral part of the roll installed on the support base for the roll, and is intended to cool the roll from the side of the internal surface upon the coolant passage through the internal part of the cooling pipeline. At that the said cooling pipeline contains a cylindrical internal pipe, and a cylindrical external pipe, that surrounds the internal pipe, acting as the discharge pipeline, through which the coolant moves from the top part of the internal cap towards the support base of the roll. Wherein the space between the external and internal pipes acts as a return pipeline, through which the coolant is returned from the support base of the roll towards the top part of the internal cap, and at the place where the direction of the coolant flow through the discharge pipeline and return pipeline changes the bottom plate is located to change the flow direction and having a hemispherical, convex downward shape, its diameter is equal or over to the half of the radius of the external pipe.

EFFECT: increased efficiency of the furnace.

4 cl, 1 tbl, 21 dwg