摘要:
Crystallizer for the continuous casting of long metal products such as blooms or billets (12), of the type cooled by an external cooling jacket, in which, at least in the zone of maximum thermal peak, positioned around the zone of the meniscus (11) or immediately below it, there are means present, made on the walls of the crystallizer (10), to condition the heat exchange between the walls of the crystallizer and the cast steel. The means to condition the heat exchange comprise concavities or depressions (20) made on the internal wall of the crystallizer (10), made around the zone of maximum thermal peak, and having a distribution that, in terms of the overall area occupied by them per surface unit, is reduced until it is canceled toward the bottom at a certain distance from said zone of maximum thermal peak.
摘要:
Equipment for continuous, horizontal casting of metal, in particular aluminium, the equipment including an insulated reservoir or pool (2), which is designed to contain liquid metal, and a releasably attached mould (3), which can be removed from the pool (2), with an insulating plate (19) with holes (25, 26) which communicate with the mould, the mould (3) including a preferably circular mould cavity (17) with a wall (12, 13) of permeable material for the supply of oil and gas. The wall provides primary cooling to the metal being cast and at least one slit or nozzles (16) arranged along the circumference of the cavity for the direct supply of coolant, providing secondary cooling at the metal. The primary cooling is so designed that it may be increased or reduced. That the insulating plate (19) is replaceable and, depending on the type of alloy and the cooling required, is designed to extend along the permeable material (12, 13) (at 24) in the cavity (17).
摘要:
A gas flow control system for molten metal molds with permeable perimeter walls, wherein an approximately constant gas mass flow is maintained in individual molds and approximately equal gas mass flows are maintained in molds on the same mold table. A PLC is utilized in combination with a gas mass flow controller to continually monitor and maintain the approximately desired mass flow of gas to the mold cavities.
摘要:
A crystalliser for the continuous casting of blooms and billets provided with a porous insert capable of ensuring an optimal distribution of a lubricant on its internal surface, over and under the meniscus, thus improving and making the lubrication more efficient, in particular, in the area contacting the skin being formed of the billet. Advantageously, the porosity features of the insert arranged in a housing made in the thickness of the crystalliser itself, allow to considerably increase the casting speed up to 3- to 4-fold with respect to the current speeds. Thanks to the crystalliser of the invention, the risk of sticking of the skin on the wall of the crystalliser, and subsequent breakage of the skin itself with break-out of the liquid metal, is also dramatically reduced.
摘要:
An adjustable mold (15) for direct chill casting of metals has longitudinally movable end walls (17) which are clamped between the mold side walls (16) during casting. Each end wall is secured to a sliding carriage (39) which supports the end wall and allows it to be moved along the end portions of the side walls. The sliding suspender has a clamping mechanism which applies a clamping force to one or both of the side walls, the force being transversely directed through a center of the end wall. The side walls are pivotable relative to one another to allow clamping and unclamping of the end walls. Preferably, one end of each side wall is pivotable so as to transversely displace the opposite end of the side wall, with the pivoting ends of the respective side walls preferably being opposite one another across the mold.
摘要:
The invention relates to a continuous casting mould (1) for liquid metal (2), especially for liquid steel (2a), comprising an upper flange (3) arranged on the entrance region of the mould (1a) and a lower flange (4) situated beneath. The upper flange (3) and the lower flange (4) form a lubricating gap (5) and an outlet slit (8) surrounding the hot sides (6) of the inner chamber of the mould (1b), for a lubricant (7). The lubricant is thus reliably guided and supplied in order to maintain a required regular, uninterrupted lubricant flow, due to the fact that the upper flange (3) and the lower flange (4) form a lubricating gap (5) for the liquid lubricant (7), said gap being evenly defined on both sides, and that the lubricating gap (5) comprises a labyrinth-type course (11) in the flow direction (9) before the lubricant outlet (10).
摘要:
A mould lubricant comprises a casting lubricant such as caster oil and a gaseous oxidation inhibiting agent such as sulphur hexafluoride (SF6). The mould lubricant can be used to lubricate a mould in the direct chill casting of a reactive metal such as magnesium.