Abrégé

Provided is an upper-nozzle/upper-plate integrated object capable of suppressing adhesion of alumina in a lower part of an upper nozzle having the largest adhesion of the alumina in molten steel. An upper-nozzle/upper-plate integrated object (1) used for a sliding gate comprises gas blowing parts (21, 22) at two locations. One gas blowing part (21) can blow gas to at least an upper part of an upper nozzle (1-1), and the other gas blowing part (22) can simultaneously blow the gas to a lower part of the upper nozzle (1-1) and a sliding surface of an upper plate (1-2).

Classes IPC  ?

• B22D 41/58 - Buses de coulée avec des moyens d'injection de gaz
• B22D 11/10 - Alimentation en métal liquide ou traitement du métal liquide
• B22D 41/42 - Caractéristiques relatives à l'injection de gaz
• B22D 41/50 - Buses de coulée

Abrégé

Provided is an ammonia decomposition device capable of achieving both an improvement in ammonia conversion rate and an improvement in catalyst life. An ammonia decomposition device (11) comprises: an ammonia gas inlet (13); a catalyst-carrying honeycomb structure (1) that decomposes ammonia to generate hydrogen and nitrogen; and a gas outlet (14). The catalyst-carrying honeycomb structure (1) includes: a ceramic honeycomb structure; a catalyst layer (3) that is formed in a flow path (2a) of the honeycomb structure and decomposes ammonia; and electrodes (4a, 4b) that are formed on a side surface of the honeycomb structure. Electricity is passed through the honeycomb structure.

Classes IPC  ?

• C01B 3/04 - Production d'hydrogène ou de mélanges gazeux contenant de l'hydrogène par décomposition de composés inorganiques, p. ex. de l'ammoniac
• B01J 27/24 - Composés de l'azote
• B01J 35/57 - Nids d’abeilles

Abrégé

Provided is a catalyst-carrying honeycomb structure capable of improving the conversion rate of ammonia and improving the lifespan of a catalyst. A catalyst-carrying honeycomb structure (1) comprises: a ceramic honeycomb structure (2); a catalyst layer (3) that is formed in a flow path (2a) of the honeycomb structure (2) and decomposes ammonia; and electrodes (4a, 4b) that are formed on side surfaces of the honeycomb structure (2). The honeycomb structure (2) is energized.

Classes IPC  ?

• B01J 35/50 - Catalyseurs caractérisés par leur forme ou leurs propriétés physiques, en général caractérisés par leur forme ou leur configuration
• B01J 27/24 - Composés de l'azote
• B01J 35/57 - Nids d’abeilles
• B01J 37/08 - Traitement thermique
• C01B 3/04 - Production d'hydrogène ou de mélanges gazeux contenant de l'hydrogène par décomposition de composés inorganiques, p. ex. de l'ammoniac

Abrégé

2322322, and MgO as main components at predetermined ratios; a kneading step of kneading the firing raw material prepared in the firing raw material preparation step; a molding step of molding the firing raw material kneaded in the kneading step; and a firing step of firing, under prescribed firing conditions, the firing raw material molded in the molding step.

Classes IPC  ?

• C04B 35/622 - Procédés de mise en formeTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques
• C04B 35/101 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée

Abrégé

Provided is a magnesia-alumina castable that can provide a good balance of both corrosion resistance and thermal spalling resistance. The magnesia-alumina castable according to the present invention contains 60-90 mass% magnesia, 10-35 mass% alumina, and 5 mass% or less silica.

Classes IPC  ?

• F27D 1/00 - CarcassesGarnissagesParoisVoûtes
• B22D 41/02 - Garnissage
• C04B 35/66 - Réfractaires monolithiques ou mortiers réfractaires, y compris ceux contenant de l'argile

Abrégé

[Problem] To provide a composition for a heat treatment jig suitable for manufacturing a heat treatment jig, etc. having high durability against thermal shock, and a method for manufacturing a heat treatment jig by using the composition for a heat treatment jig. [Solution] The composition for a heat treatment jig according to the present invention is characterized by including alumina in a range of 5-33% by weight, silicon carbide in a range of 2-20% by weight, and one or more selected from mullite, cordierite and spinel as the balance. The composition for a heat treatment jig according to the present invention may have an average particle size of silicon carbide in the range of 12-45 μm. Further, the composition for a heat treatment jig according to the present invention may include spinel in a range of 35-65% by weight. The composition for a heat treatment jig can be suitably used in a method for manufacturing a heat treatment jig such as a heat treatment container 10.

Classes IPC  ?

• C04B 35/443 - Spinelle d'aluminate de magnésium
• C04B 35/64 - Procédés de cuisson ou de frittage

Abrégé

It is an object to form a plate for a sliding nozzle apparatus in a shape for decreasing excessive erosion and extend durability of the plate to enable cost reduction, the sliding-nozzle plate having dimensions (unit length is mm) as indicated in following equations: a dimension from the center position X of the nozzle hole to a closest end of the plate for the sliding nozzle in the longitudinal direction is a sum of a dimension "b" from the center position X to an ideal circle with the position X as the center and a dimension "d" from the ideal circle to the closest end in the longitudinal direction, a dimension from the center position X and to a center position Y is a dimension S of the stroke, and a dimension from the center position Y to a closest end of the plate for the sliding nozzle in the longitudinal direction is a dimension "c", where b: a+30~40, c: 0.75a+20~30, d:0.5a, S:2a+m, and m:15~35.

Classes IPC  ?

• B22D 41/50 - Buses de coulée
• B22D 41/28 - Plaques à cet effet

Produits et services

refractories for iron-and steel-making processes, namely blocks and linings for hearth, bosh and wall of a blast furnace; iron launders and skimmers, i;e;, blast furnace troughs; blast tuyere rings; lining materials for a Torpedo car, i;e;, a car for transporting hot metal; iron ladle linings; linings, taphole sleeves, and multi-hole plugs for bottom blowing, for a basic oxygen furnace (BOF); roof blocks, linings, bottom blowing plug, and spouts, for an electric arc furncace; linings for secondary steel making (i;e;, AOD, VOD, LF, RH, DH and ASEA-SKF); steel teeming ladles; injection lances; porous plugs; covers, dams and linings for a tundish; rotary nozzles and sliding nozzles for steel flow control systems ; stoppers for continuous casting; ladle shroud and submerged entry nozzles for continuous casting; break rings for horizontial continuous casting; equipment for reheating furnaces; soaking pit linings; unshaped refractories, i;e;, castable materials, ramming materials, gunning materials, mortars, fillers and [ lagging materials ] ; and preheaters and temperature controllers; refractories for ferrous and non-ferrous casting systems, namely crucibles and accessories thereof; cupola components; thermocouple sheaths; [ stalks; ] and immersion heater tubes; refractories for equipment for manufacturing cement, namely (1) rotary kiln linings; and (2) equipment for a rotary kiln; refractories for incinerators; and bricks, raw materials for making bricks, cement, clinkers and nonmetallic tiles

Produits et services

(1) Refractory materials.