Abstract: A refractory brick wall system for towers and the like which includes an outside casing and a plurality of bricks laid up in a pattern on the inside of the casing. Tie-back devices secure the bricks to the casing and allow for relative horizontal and relative vertical movement between the bricks and the casing. A plurality of shelves are fixed to the inside of the casing at vertically spaced intervals to provide support for the bricks in vertical sections thereof. A lightweight, insulating refractory material is cast between the casing and the bricks. The bricks themselves are shaped with ring and groove sides for interlocking of the bricks in a laid-up wall construction thereof.

Abstract: A modular door jamb and lintel system for an industrial furnace having an access door opening. A module is provided with a pair of spaced, generally vertical door jambs of precast refractory material. A refractory lintel spans the door jambs and combines therewith to define a frame for the access opening. Hangers are provided on the lintel to facilitate transporting and installing the lintel in position at the access opening. Fasteners are provided on at least the door jambs to facilitate securing the door jambs to appropriate structural members about the access opening.

Abstract: A conventional glass tank furnace used in the manufacture of glass is provided with a system for recovering heat which inevitably escapes from the furnace roof or crown above the melting and refining tanks of the furnace. A heat recovery plenum means is mounted on top of the furnace roof or crown, and an air blower supplies cool air to the plenum means through a first duct means. The cool air directed to the plenum means cools the furnace crown and in the case of a suspended flat arch crown, the supporting steel work. The cool air in the plenum means is heated by heat escaping from the furnace crown, and thereafter is directed through second duct means to a main combustion air blower where the heated air from the plenum means is mixed with primary combustion air and directed to the furnace and to the furnace burners. Control means are provided to maintain the air in the plenum means at positive pressure so as to prevent air in the furnace from escaping through the furnace crown.