Manufacture of magnesite-chrome brick for open-hearth furnace roof with heat insulation

Conclusions Roof brick with trapezoidal openings instead of round ones was manufactured under industrial conditions.The possibility in principle has been shown of mass-producing intricately-shaped units with holes not only of re rectangular shape, but also with sharp corners, in the form of a dovetail. The batch production of these parts on hydraulic presses with a single pressing cycle is advised.Research should be carried out on further improving the shape of roofbrick and ceramic suspensions for heat insulated roofs.