Mobile removable hearth for furnace and transporter

An assembly comprising:

• at least one mobile hearth skid comprising:
• a base comprising a top horizontal surface with a base perimeter edge and at least two supports extending from said top horizontal surface;
• and,
• a refractory platform supported by said top horizontal surface and comprising a refractory platform perimeter edge including a front perimeter edge, a rear perimeter edge, and at least two side perimeter edges;
• wherein said rear perimeter edge and said at least two side perimeter edges form a continuous shoulder extending beyond said base perimeter edge, said shoulder having a shoulder horizontal surface and a shoulder vertical surface;
• wherein the assembly further comprises:
• a plurality of furnaces and/or cooling chambers, wherein each of said plurality of furnaces and/or cooling chambers comprises:
• an enclosure comprising footings, a top, a rear wall, at least two side walls, and a door opposing said rear wall, wherein each of said top, first and second side walls, said rear wall, and said door comprise an inner surface;
• a refractory lining attached to each of said top inner surface, said first and second side wall inner surfaces, said rear wall inner surface, and said door inner surface;
• a single continuous ledge comprising first, second and third ledge sections, said first ledge section positioned at a bottom edge of said refractory lining attached to said first side wall inner surface, said second ledge section positioned at a bottom edge of said refractory lining attached to said second side wall inner surface and said third ledge section positioned at a bottom edge of said refractory lining attached to said rear wall inner surface, wherein each of said first, second and third ledge sections of said single continuous ledge has a ledge vertical surface and a ledge horizontal surface;
• and
• wherein the assembly further comprises:
• a mobile transporter positioned under said top horizontal surface of one of said at least one mobile hearth skid;
• wherein said third ledge section is continuous with and perpendicular to each of said first and second ledge sections;
• wherein a gap is formed by said footings between a bottom surface of said single continuous ledge and a surface supporting said footings;
• wherein said shoulder vertical surface and said shoulder horizontal surface are arranged to contact said ledge vertical surface and said ledge horizontal surface, respectively, of each of the first, second and third ledges sections to form a refractory seal;
• and
• wherein the mobile transporter is removable from below the at least one mobile hearth skid after formation of the refractory seal.