A heat treatment apparatus includes: a reaction tube processing a plurality of substrates; a support member supporting the reaction tube; a flange protruding outwardly from a lower end of the reaction tube: a concave portion formed in an outer periphery of the flange; and a rotatable roller installed in a top surface of the support member. The rotatable roller engages the concave portion and positions the reaction tube in a circumferential direction.

A high-temperature containment structure includes a roof assembly including at least one layer of refractory material that includes a first layer of refractory material, a plurality of sidewalls, a plurality of pockets disposed in the first layer of ceramic refractory material, each pocket including a retainer that is spaced apart from sides of the pocket by gaps when the roof assembly is at room temperature, an upper plate disposed above the first layer of refractory material, and a first plurality of suspension rods that pass through first holes in the at least one layer of refractory material and the upper plate, wherein the plurality of suspension rods mechanically couple the retainers to the upper plate to retain the at least one layer of refractory material. The structure can use materials with different thermal expansion rates without cracking at elevated temperatures.

Apparatus for heating metal products, able to heat by electromagnetic induction at least one metal product positioned in a heating chamber and mobile in a direction of feed, in which said heating apparatus comprises one or more heating coils positioned in a ring around said heating chamber and said metal product to be heated; said one or more heating coils are positioned substantially transversely to the direction of feed of the metal product and are able to generate a magnetic field having a direction substantially parallel or coincident to the direction of feed of the product to be heated and directed in the same direction as said direction of feed of the product to be heated; said heating apparatus also comprises at least one heat shield positioned between said one or more heating coils and the metal product to be heated; said heat shield comprises walls provided with blocks of thermal and electric insulating material and positioned around the metal product to be heated and also comprises cooling pipes positioned in said walls and configured to allow the flow of at least one cooling fluid.

A composite heat insulating lining includes an upper lining and a lower lining. The upper lining and the lower lining each include an inorganic fiber prefabricated layer, and the inorganic fiber prefabricated layer is configured to reduce the heat conductivity of the lining, thereby reducing heat loss. In addition, existing inorganic fiber materials are generally not resistant to high temperature. The composite heat insulating lining provided according to the present application is provided with a refractory coating on a surface of the inorganic fiber prefabricated layer to avoid direct heating of the inorganic fiber prefabricated layer, thereby avoiding high temperature damage to the inorganic fiber prefabricated layer, and improving the service life of the composite heat insulating lining. An ethylene cracking furnace is further provided according to the present application, which includes any one of the above composite heat insulating linings.

A furnace structure includes a roof assembly of at least one layer of refractory material, and a metal plate that covers the at least one layer of refractory material and is configured to dissipate heat from the furnace structure; a plurality of sidewalls fixed to the roof, each of the sidewalls comprising refractory material at an interior surface and a metal wall plate at an outer surface; and a plurality of infrared emitters disposed in an opening in at least one of the refractory material of the sidewalls or the refractory material of the roof.

A refractory lining structure for a metallurgical vessel is characterized by at least one elongated expansion joint formed in and extending through the surface of the working lining in a substantially vertical direction. The elongated expansion joint accommodates thermal expansion of the working lining in a metallurgical vessel such as, for example, a tundish during preheating for a continuous casting operation. The elongated expansion joint decreases crack formation, delamination, and spalling of the working lining from underlying back-up linings and/or safety linings in metallurgical vessels during preheating and use, while still facilitating metal skull removal after the completion of metallurgical operations.

A furnace structure includes a roof assembly of at least one layer of refractory material, and a metal plate that covers the at least one layer of refractory material and is configured to dissipate heat from the furnace structure; a plurality of sidewalls fixed to the roof, each of the sidewalls comprising refractory material at an interior surface and a metal wall plate at an outer surface; and a plurality of infrared emitters disposed in an opening in at least one of the refractory material of the sidewalls or the refractory material of the roof.

A furnace containment structure includes a roof assembly including at least one layer of refractory material that includes a first layer of refractory material, a plurality of sidewalls, a plurality of pockets disposed in the first layer of ceramic refractory material, each pocket including a retainer that is spaced apart from sides of the pocket by gaps when the roof assembly is at room temperature, an upper plate disposed above the first layer of refractory material, and a first plurality of suspension rods that pass through first holes in the at least one layer of refractory material and the upper plate, wherein the plurality of suspension rods mechanically couple the retainers to the upper plate to retain the at least one layer of refractory material. The structure can use materials with different thermal expansion rates without cracking at elevated temperatures.

A double insulating wall structure heating furnace capable of preventing its inner pipe whose strength has decreased due to high-temperature heating from being damaged. A double insulating wall structure heating furnace 1 includes an outer pipe 2 and an inner pipe 3 disposed inside the outer pipe 2, in which a sealed space 8 formed between the outer and inner pipes 2 and 3 is depressurized and a heating space 13 formed inside the inner pipe 3 is heated, and in which a tubular reinforcing member 6 is disposed so as to cover an outer circumference of the inner pipe 3, the tubular reinforcing member being formed of a material having a higher heat resistance and a higher strength than those of the material of the inner pipe 3.

A refractory lining structure for a metallurgical vessel is characterized by at least one elongated expansion joint formed in and extending through the surface of the working lining in a substantially vertical direction. The elongated expansion joint accommodates thermal expansion of the working lining in a metallurgical vessel such as, for example, a tundish during preheating for a continuous casting operation. The elongated expansion joint decreases crack formation, delamination, and spalling of the working lining from underlying back-up linings and/or safety linings in metallurgical vessels during preheating and use, while still facilitating metal skull removal after the completion of metallurgical operations.