A method for protecting an inner wall (12) of a shaft furnace, the method comprising the steps of: providing at least one injection device (28) through the inner wall (12) of the shaft furnace, the injection device (28) being configured to inject protective material into the shaft furnace; and injecting on demand the protective material into the shaft furnace through the injection device (28), in such a manner that the protective material builds up to form a protection wall between the interior of the shaft furnace and the furnace wall (12).

A device for the heat treatment of a product includes a housing, and a conveyor for conveying the product between an inlet of the housing and an outlet of the housing. The conveyor includes a screw which is mounted so as to turn in the housing according to a geometric axis of rotation and comprising an actuator for rotating the screw according to said axis, with ohmic heating of the screw. Accordingly, the housing comprises an envelope consisting of a refractory material through with the screw extends, said envelope being shaped in the form of a tube, the main inner surface of which follows contours of the screw.

A device for the heat treatment of a product includes a housing, and a conveyor for conveying the product between an inlet of the housing and an outlet of the housing. The conveyor includes a screw which is mounted so as to turn in the housing according to a geometric axis of rotation and comprising an actuator for rotating the screw according to said axis, with ohmic heating of the screw. Accordingly, the housing comprises an envelope consisting of a refractory material through with the screw extends, said envelope being shaped in the form of a tube, the main inner surface of which follows contours of the screw.

A fluidized bed system having a containment vessel, a precast and predried monolithic refractory floor module positioned in the vessel, and a plurality of precast and predried monolithic refractory wall modules stacked within the vessel. The plurality of wall modules includes a first wall module is positioned on the floor module, wherein the floor module and the first wall module have interlocking surfaces, and wall modules adjacent to one another have interlocking surfaces. A method for assembling a fluidized bed reactor is also provided.

Described herein is a sidewall suitable for use in a metallurgical furnace, and metallurgical furnace having the same. The sidewall has an upper wall, an outer wall coupled to an outer side of the upper wall, and extending downward from the outer wall. A sloped wall is coupled to an inner side of the upper wall. The sloped wall extends downward and inward from the upper wall. The sloped wall has a first surface facing the outer wall and a second surface facing a centerline of the sidewall. A spray cooling assembly is disposed between the sloped wall and the outer wall. The spray cooling assembly is configured to spray coolant on the first surface of the sloped wall.

A method for protecting an inner wall (12) of a shaft furnace, the method comprising the steps of: providing at least one injection device (28) through the inner wall (12) of the shaft furnace, the injection device (28) being configured to inject protective material into the shaft furnace; and injecting on demand the protective material into the shaft furnace through the injection device (28), in such a manner that the protective material builds up to form a protection wall between the interior of the shaft furnace and the furnace wall (12).