摘要:
An airlock of integral one piece construction for the trough of a refining furnace, the airlock having opposed vertical walls with portions that fit snugly within the trough opposed vertical walls and downwardly angled extensions which, with a top wall that connects the side wall extensions, define a snout whose open part projects into the molten metal in the furnace chamber to dynamically seal the trough from entry of air.
摘要:
A method and product improve the positioning of loose anti-skulling material in the outlet nozzle zone of a metallurgical pouring vessel. The formation of skull in the outlet nozzle zone of a metallurgical pouring vessel is inhibited by positioning in the outlet nozzle zone an elongated container containing loose anti-skulling material, the container being formed of an intumescent material so that when heated it expands to fill the gap between itself and the walls of the nozzle and releases the anti-skulling material.
摘要:
A metallurgical flux is provided as bonded particulates in granular or briquette form, which contains fluxing ingredients, binder and an expanding agent whereby action of heat in contact with molten metal causes expansion of the expanding agent to break down the bonded particulates into particulate form.
摘要:
An improved refractory support (kiln furniture) and a method of manufacture. The composition of the refractory support reduces the likelihood that it will adhere to the article which it is supporting during manufacturing. The kiln furniture is formed from bound ceramic fibers of aluminosilicate and alumina with a ground particulate filler of aluminosilicate and alumina, and refractory reactive binder of alumina and silica in a colloidal form.
摘要:
An insulation sheath for a pipe in a furnace is provided. The sheath has excellent insulation properties together with adequate resistance to the corrosive environment and thermal shock conditions. A pre-formed, substantially C-shaped, elongate member shaped to conform to the pipe over a portion of its circumference, the member comprising an inner layer of bonded insulating material integrally-bonded to a protective outer layer of refractory material. The inner layer is preferably formed of bonded ceramic fibre.
摘要:
An exothermic composition comprises a particulate readily oxidizable metal such as aluminum, magnesium or silicon and an organic fluorine-containing compound, and usually an oxidizing agent for the readily oxidizable metal. The preferred organic fluorine-containing compound is polytetrafluoroethylene. The composition may also contain a binder, a particulate refractory material, refractory fibres and/or organic fibres. The composition may be used in the casting of molten metal, either in particulate form or as a preformed shape such as a sleeve or board, to cover or surround molten metal in the feeder of a casting mould or in the head or head box of an ingot mould.
摘要:
A hot top lining assembly for an ingot mould or for an ingot mould head box is made up of four boards of refractory material and fixed together by means of a guide bar incorporated in a wedge-shaped portion in the lateral edge of one of the boards mating with a slot in a lateral edge of an adjacent board.
摘要:
A filter for use in the filtration of molten metals comprises a ceramic foam having a gasket made from fibrous material surrounding its peripheral surface and a metallic foil, such as aluminum foil, fixed to the gasket, for example by means of an adhesive, around the outer peripheral surface of the gasket.
摘要:
The invention relates to a means of purifying molten metal, particularly steel, by the removal of impurities/inclusions during continuous casting.The molten metal (3) is passed in a tundish (1) through a vertical array of baffles (8) that are spaced apart transversely across the tundish to provide restricted flow channels (12). The baffles (8) may be flat boards or tiles (9a, 9b) and are preferably used in contact with a weir (7) and dam (10), upstream and downstream respectively of the baffles.The speed and direction of flow of the molten metal can thereby be controlled and directed to give more effective dwell time in contact with a surface covering layer (11) of flux.
摘要:
A mould (61) for metal casting has a mould cavity (62) and a sprue (63) communicating directly with the mould cavity (62) and located in the sprue (63) a sleeve (64) of refractory material having a cellular ceramic filter (65) fixed therein. The mould, which has no running system apart from the sprue, may be a sand mould or a metal die for producing castings by gravity or low pressure diecasting. The cellular ceramic filter may be a honeycomb type of structure having cells which extend between two outer surfaces of the filter or a structure having interconnecting cells such as a ceramic foam.