摘要:
The invention relates to a diffuser for use in a tundish and made of a refractory material comprising (a) a base portion having a top surface and a bottom surface, wherein said top surface is an impact surface suitable for withstanding the impact of molten metal; and (b) an outer side wall entirely surrounding said base portion and extending from said top surface of said base portion in order to from a substantially bucket-like structure, and characterised in that said outer side wall comprises two or more flow outlets in the form of recesses extending from the edge of said side wall furthest away from said base portion towards but not up to said base portion. The invention further relates to the use of a diffuser in the process of pouring molten metal through a tundish.
摘要:
The invention relates to a fireproof (refractory) ceramic impact pad (also called impact pot, German: Pralltopf), which is typically installed along the bottom of a vessel treating metallurgical melts at an area where the metal melt, poured into the vessel, normally hits the vessel bottom. Insofar the impact pot has the task to protect the refractory bottom of the metallurgical vessel (to reduce its wear) and/or to distribute the metal melt within the vessel.
摘要:
The flotation separation of inclusions in molten steel is performed with increased certainty and efficiency in comparison to conventional methods using a tundish having a weir consisting of a wall part and an eave-shaped part horizontally extending from the top edge of the wall part. Using a tundish 1 in which a weir 7 consisting of a wall part 8 extending so as to surround a molten steel charging position, an eave-shaped part 9 horizontally extending from the top edge of the wall part and at least one notch 12 is placed at a position between the molten steel charging position 5 and a molten steel discharge port 6, a steel cast piece 14 is continuously cast under conditions such that the height H of the upper surface of the molten steel in the tundish and the flow rate Q of the molten steel charged from the ladle into the tundish satisfy expression (1) below, where h represents the height of the weir, S represents the area of the upper opening of the weir, L represents the distance between the front edge on the molten steel charging position side of the eave-shaped part and the surface on the short side of the tundish, and W represents the distance between the front edge on the molten steel charging position side of the eave-shaped part and the surface on the long side of the tundish. 3.50 ‰¦ H - h × S × Á Q 1.37 - 0.6 + 7 L 6 × S × Á Q 1.37 + 7 �¢ W 6 × S × Á Q 1.37 ‰¦ 9.50
摘要:
The invention relates to a diffuser for use in a tundish and made of a refractory material comprising (a) a base portion having a top surface and a bottom surface, wherein said top surface is an impact surface suitable for withstanding the impact of molten metal; and (b) an outer side wall entirely surrounding said base portion and extending from said top surface of said base portion in order to from a substantially bucket-like structure, and characterised in that said outer side wall comprises two or more flow outlets in the form of recesses extending from the edge of said side wall furthest away from said base portion towards but not up to said base portion. The invention further relates to the use of a diffuser in the process of pouring molten metal through a tundish.
摘要:
The invention relates to an impact pad (20), for use in a T-shaped tundish (10), the pad (20) comprising a base (21) having an impact surface and an outer side wall (22) extending upwardly therefrom and defining an interior space having an upper opening (24) for receiving a stream of molten metal. This pad is characterized in that the interior space is divided into two regions (25a,25b) by a separating wall (26) provided with at least one passageway (27) for the molten metal stream, the separating wall (26) extending upwardly beyond the outer side wall (22). This impact pads increases the homogeneity of the molten steel cast from the different outlets of the T-shaped tundish and provides equal or relatively similar residence times of the molten steel discharged through the different outlets of the tundish. This impact pad also permits a fast transition of the steel quality at ladle change while retaining the advantages of conventional impact pads (low level of slag emulsification).
摘要:
The invention relates to an impact pad for protecting the impact surface against which a pouring stream strikes in a metallurgical vessel, particularly in a tundish for strand casting, with delimiting walls, which surround the impact area and which, together with the impact surface, form a tub. The impact pad (4, 104, 204, 304, 404) has a covering (4d, 104d, 204d, 304d, 404d, 6, 7, 8) that closes the tub at the top. Said covering can be partially destroyed by the pouring stream (3, 503) arriving inside the impact pad (4, 104, 204, 304, 404).
摘要:
A tundish impact pad (1: 20: 40: 60) formed from refractory material comprising a base (2: 22: 42: 62) having an impact surface which, in use, faces upwardly against a stream of molten metal entering a tundish, a wall (4: 23: 43: 63) extending upwardly from the base around at least a part of the periphery of the impact surface, one or more portions of the upper part of the wall supporting one or more overhangs (5: 24: 44: 64) which project inwardly over the periphery of the base. The width of the or each overhang increases in both directions away from its centre/top, or has a minimum width at one end thereof and a maximum width at the opposite end thereof.
摘要:
A distributor device for use in aluminium casting includes a rigid, substantially bowl-shaped receptacle (2) of a refractory material having a base member (4) and a peripheral wall (6) that extends upwards from the base. The receptacle has an inlet opening (8) towards the upper end thereof and a pair of outlet openings (14) towards the base thereof. The device is constructed and arranged such that, in use, molten aluminium poured into the distributor device through the inlet opening (8) is redirected by the distributor device and flows outwards into the mould through the outlet openings (14).
摘要:
The invention relates to a fire resistant ceramic part which can be embodied in the form of an impact pot or a casting gutter and has the following characteristics: - a base (10); - at least two walls (12, 14 ) which extend from opposite sections (10l, 10r) of the base (10) such that at least some sectors (12.1, 12.3, 12.4 ) of the inner surfaces thereof run at an angle > 0 and