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.

An ultra-low thermal mass refractory article includes fibers impregnated with a colloidal inorganic oxide. The refractory article has at least one of the following properties: (i) a density of 500 kg/m.sup.3 to 1500 kg/m.sup.3; (ii) a thermal conductivity of 1.0 Wm/K or less at 700° C.; and/or (iii) a linear thermal shrinkage at 1400° C. of less than 2.5%.

A unitary refractory ring having a sidewall surrounding and spaced from a center axis, and one or more lifting lugs distributed around the center axis. The lifting lugs extend from an inner face of the sidewall towards the center axis, and are located between lower and upper axial faces of the sidewall. Each lifting lug has a lower lug face extending radially towards the center axis from the inner face of the sidewall, and a backing structure extending upwards along an axial direction from the lower lug face towards the upper axial face of the sidewall. An assembly of refractory rings, and methods for making and assembling refractory rings are also provided.

The present invention relates to inorganic fibres having a composition comprising: 65.7 to 70.8 wt % SiO.sub.2; 27.0 to 34.2 wt % CaO; 0.10 to 2.0 wt % MgO; and optional other components providing the balance up to 100 wt %,
wherein the sum of SiO.sub.2 and CaO is greater than or equal to 97.8 wt %; and the other components, when present, comprise no more than 0.80 wt % Al.sub.2O.sub.3; and wherein the amount of MgO and other components are configured to inhibit the formation of surface crystallite grains upon heat treatment at 1100° C. for 24 hours, wherein said surface crystallite grains comprise an average crystallite size in a range of from 0.0 to 0.90 μm.

A shielding module for a high-temperature furnace has a packet of interconnected shielding plates. The packet of interconnected shielding plates is mounted to a common base body. The base body has fixing points for fixing to base bodies of other shielding modules of the same kind.

A construction method of a fiber lining surface of an ethylene cracking furnace includes the following steps: S1, leveling the fiber lining surface; S2, wetting the leveled fiber lining surface; S3, rooting the wetted fiber lining surface; and S4, coating, before the fiber lining surface is dried, high-temperature paint to the fiber lining surface that has been rooted; and reserving multiple expansion sews on the fiber lining surface during the coating process. According to the construction method of the high-temperature paint for full fiber lining structure of the ethylene cracking furnace, the high-temperature paint is firmly bonded with the lining, and will not crack or fall off during use, protecting the full fiber lining by the coating and greatly extending the service life of the lining.

A method for monitoring the wear of a refractory lining of a blast furnace using modelling of a part of the blast furnace and thermal field calculation. Computer program allowing to perform such a method.

To improve the stability of spray application of a monolithic refractory in which a water injector is disposed in a material carrier pipe extending from a material supply device to a distal spray nozzle, and application water is injected from the water injector into a spray material that is being carried through the material carrier pipe, a ratio of a flow volume of an application water carrier gas for carrying the application water to be introduced into the water injector to a flow volume of a spray material carrier gas for carrying the spray material is set to 0.07 to 2, and a compressibility index of the spray material is set to 32% or less. Alternatively, a ratio of a flow volume of an application water carrier gas for carrying the application water to be introduced into the water injector to an application water volume is set to 100 to 1,000.

A system and method for repairing a coke oven having an oven chamber formed from ceramic bricks. A representative system includes a insulated enclosure insertable into the oven chamber and includes removable insulated panels that define an interior area for workers to work in. The insulated enclosure is movable between an expanded configuration and a compact configuration and moving the enclosure to the expanded configuration will decrease the distance between the insulated enclosure and the walls of the oven chamber. Removing the panels exposes the ceramic bricks and allows workers within the interior area to access and the bricks and repair the oven chamber while the oven chamber is still hot. A loading apparatus lifts and inserts the insulated enclosure into the oven chamber. The insulated enclosure can be coupled to additional insulated enclosures to form an elongated interior area.

A furnace may include an outer wall defining a chamber, the chamber including an internal cavity configured to receive one or more parts, at least one heater positioned within the chamber, the at least one heater being configured to generate temperatures of at least about 800 degrees Celsius within the internal cavity, and a vacuum pump configured to apply a vacuum to at least a portion of the chamber. The furnace may also include at least one layer of inner insulation and at least one layer of outer insulation disposed outward of the inner insulation with respect to the chamber, the at least one layer of outer insulation being sealed with respect to the at least one layer of inner insulation.