Patent ID: 6416708
Filing Date: 2002-07-09
Classification: C21B,F27B,F27D

Abstract:
A blast furnace for iron making, comprising a hearth portion, and which at least in the hearth portion, further comprises:a steel plate lining (2), at least one layer of refractory brickwork (15, 16, 17) arranged, inside the steel plate lining (2), at least one member of the group consisting of mortar joints (5) and ramming compound joints to join the steel plate lining (2) to the at least one layer of brickwork to form a cohesive structure, metal bars (11) which run in a circumferential direction inside the steel plate lining (2) and project into the refractory brickwork, wherein the bars each are connected to an outer side of the steel plate lining by two horizontally spaced attachment means (13) each separately running through the steel plate lining, the attachment means (13) being provided with prestressing means (18, 19, 20) for exerting a prestressing force to ensure that each bar (11) always remains pressed against bricks (15, 16) of the brickwork to maintain a surface-to-surface contact along horizontal and vertical surfaces between the metal bars and bricks during operation of the hearth.