A molten metal furnace capable of preventing or suppressing the molten metal leakage and controlling the leakage direction. A molten metal furnace including an outer wall in an outer peripheral portion and a molten metal storage part holding a molten metal, in which a plurality of lining material layers are arranged on an inner wall of the molten metal furnace forming the molten metal storage part; of the lining material layers, a first lining layer constituting a surface in contact with the molten metal is made of a refractory material; and a sealing material is provided on at least one boundary between the first lining layer and the outer wall.

Provided is a method of installing a heat insulating block on a furnace shell which enables a heat insulating block to be firmly fixed to a furnace wall but does not require much time and costs for making the heat insulating block, and which further offers good workability at a site. The method of installing a heat insulating block on a furnace shell includes: inserting a beam of a fixture into a fold of an inorganic fiber aggregate mat that is folded up to form a heat insulating block; and fixing the fixture and a furnace shell to each other.

A hollow-cylindrical heat shield includes at least one graphite foil and at least one fiber structure, preferably a wound fiber structure, disposed on the outer side of the at least one graphite foil. The (wound) fiber structure has a degree of coverage of less than 100%. A high-temperature furnace or gas converter having a heat shield is also provided.

A device operates at high temperature, especially up to 550 C. and in particular between 50 and 350 C., such as an oven or an oven part. The device includes at least one insulating product formed of at least two layers, including a first layer, placed towards the heating zone and/or the heating element(s) to be insulated, formed of mineral wool(s) and/or fibre(s) and having a density of less than 120 kg/m.sup.3, and a second layer, further away, chosen from insulators formed of aerogel(s) or of amorphous silica or vacuum insulators or any other superinsulator. Additionally, an insulating product is appropriate for this device.

The present invention relates to a heat-permeable tube which has a double-walled construction. The material of the interior wall contains ceramic matrix composite. The material of the exterior wall contains metal. The present invention further relates to the use of this tube in a rotary tube furnace and the use of the rotary tube furnace for thermal treatment of materials. Furthermore, the invention relates to the use of a single-walled tube containing ceramic matrix composite as rotary tube.

The present invention relates to a heat-permeable tube which has a double-walled construction. The material of the interior wall contains fiber composite ceramic. The material of the exterior wall contains metal. The present invention further relates to the use of this tube in a rotary tube furnace and the use of the rotary tube furnace for thermal treatment of materials. Furthermore, the invention relates to the use of a single-walled tube containing fiber composite ceramic as rotary tube.

Provided is a method of installing a heat insulating block on a furnace shell which enables a heat insulating block to be firmly fixed to a furnace wall but does not require much time and costs for making the heat insulating block, and which further offers good workability at a site. The method of installing a heat insulating block on a furnace shell includes: inserting a beam of a fixture into a fold of an inorganic fiber aggregate mat that is folded up to form a heat insulating block; and fixing the fixture and a furnace shell to each other.

An installation method of a refractory fiber integral module, includes: carrying out construction pretreatment, then welding an anchoring part to a furnace wall, and then laying a tiled layer along the furnace wall; then fixing the refractory fiber integral module neatly on a hot surface of the tiled layer by the anchoring part to form a refractory fiber prefabricated layer, and filling reserved gaps between the refractory fiber integral modules with compensation strips; finally checking the refractory fiber prefabricated layer, and repairing gaps whose width is greater than a preset width.

A device operates at high temperature, especially up to 550 C. and in particular between 50 and 350 C., such as an oven or an oven part. The device includes at least one insulating product formed of at least two layers, including a first layer, placed towards the heating zone and/or the heating element(s) to be insulated, formed of mineral wool(s) and/or fibre(s) and having a density of less than 120 kg/m.sup.3, and a second layer, further away, chosen from insulators formed of aerogel(s) or of amorphous silica or vacuum insulators or any other superinsulator. Additionally, an insulating product is appropriate for this device.

Disclosed are a fibrous insulation block which can improve work efficiency of lining construction in various types of refractory furnace in iron works, and a construction method for a heated furnace-surface lining using the same. Specifically disclosed is a fibrous insulation block which comprises: a unit block (2) formed by laminating fibrous insulation blankets under pressure; a packing material (3) which has a pressing surface abutting section (5) covering at least a part of each pressing surface (2a, 2b) which are the side surfaces of the unit block in the direction in which the blankets are laminated, and a heating surface protection section (6) connected to the pressing surface abutting section so as to cover at least a part of a heating surface (2c) of the unit block, and in which a boundary section (7) between the pressing surface abutting section and the heating surface protection section covers an angle section formed by the pressing surfaces and the heating surface of the unit block; and a binding band (4) which maintains the shape of the unit block (2) using the packing material (3). The heating surface protection section (6) of the packing material (3) can be moved by the removal of the binding band and disposed on the same plane as the pressing surface abutting section, and has handhold sections (10) provided therein.