An example mobile kiln system includes a mobile platform. A frame is mounted to the mobile platform. At least one kiln is rotatably mounted to the frame. The kiln is movable between a first operational position for loading a feed material into the at least one kiln, and a second operational position for unloading a biochar product from the at least one kiln following processing of the feed material. In an example, the mobile kiln system includes at least one stack assembly for the kiln. The stack assembly has a lid to cover the kiln to retain heat and a chimney to release emissions from the kiln during processing of the feed material.

An example mobile kiln system includes a mobile platform. A frame is mounted to the mobile platform. At least one kiln is rotatably mounted to the frame. The kiln is movable between a first operational position for loading a feed material into the at least one kiln, and a second operational position for unloading a biochar product from the at least one kiln following processing of the feed material. In an example, the mobile kiln system includes at least one stack assembly for the kiln. The stack assembly has a lid to cover the kiln to retain heat and a chimney to release emissions from the kiln during processing of the feed material.

A method of quickly changing a portion of the roof of an electric arc furnace having a top loading roof system comprising providing at least one pie-shaped water cooled panel supported below the roof support beams and located to protect the underside hot face of the roof support beams, providing at least one quick water disconnect for connecting the at least one pie-shaped water cooled panel to a water supply, raising and removing the at least one pie-shaped water cooled roof panel, replacing the at least one pie-shaped water cooled roof panel with another pie-shaped water cooled panel or repairing the at least one pie-shaped water cooled roof panel, and continuing operation of the furnace.

A duct system of an electric arc furnace includes a plurality of walls each including sinuously winding piping having an inlet and an outlet, and a portion of a first wall of the plurality of walls forming a working platform. The platform is movable between a raised position and a lowered position. In the raised position, the portion of the first wall is disposed in proximate vertical alignment with the remainder of the first wall. In the lowered position, the portion of the first wall is disposed substantially perpendicularly to the remainder of the first wall. The portion of the first wall is sized to occupy a cross-sectional area formed by the plurality of walls such that the portion of the first wall is disposed in close proximity to the other of the plurality of walls.

A method of quickly changing a portion of the roof of an electric arc furnace having a top loading roof system comprising providing at least one pie-shaped water cooled panel supported below the roof support beams and located to protect the underside hot face of the roof support beams, providing at least one quick water disconnect for connecting the at least one pie-shaped water cooled panel to a water supply, raising and removing the at least one pie-shaped water cooled roof panel, replacing the at least one pie-shaped water cooled roof panel with another pie-shaped water cooled panel or repairing the at least one pie-shaped water cooled roof panel, and continuing operation of the furnace.

The invention relates to a heat exchanger (1) comprising a shell (2) containing a heat exchange device (3) and delimiting a combustion chamber (30), said shell (2) being provided with an access opening and with a door (5) provided on its inner face with a burner (4).

It is remarkable in that said door (5) is mounted pivotally around a pivot (6) attached to the end of a slide (7), in that said shell (2) is provided on its exterior surface with axial guide means (8) of said slide (7) along a displacement axis X2-X2 which extends parallel to the longitudinal axis X-X of said shell (2), in that the pivot (6) extends along an axis Z-Z perpendicular to said displacement axis X2-X2, the travel of said slide (7) being greater than the length of the burner (4).

A melting furnace for melting metal may have a first heating device having at least one electrically heatable immersion heating element. The furnace may also have a circulating arrangement designed to create a flow of molten metal within the melting furnace. A method for melting metal using the melting furnace is also provided.