摘要:
Method and device to control the axial position of slabs emerging from continuous casting applied in rolling plants comprising at least a casting machine (11), an extraction and straightening assembly (12) with pairs of rolls (25), a heating and/or temperature maintenance furnace (15) and a roughing and pre-finishing (16) or finishing train (19), said device comprising means (26, 31a, 31b) to detect the axial position of the slab (24) arranged in at least a position upstream of or inside said furnace (15) and a processing unit (30) able to receive from said means (26, 31a, 31b) the signal relating to the axial position of the slab (24) and to condition the activation of at least one of said pairs of rolls (25) of the extraction and straightening assembly (12) to obtain a differentiated pressing of the slab (24) in the direction of the width in order to at least partly eliminate a possible discrepancy (Δ) of the axis (28) of the slab (24) with respect to the rolling axis (27).
摘要:
A method is provided for installing a refractory lining in a metallurgical vessel having a main opening (14) which is much smaller than the diameter of the vessel (10). The method is especially useful in a vessel (10) having a circular or otherwise curved cross-section. A form (20) or mold is assembled inside the vessel, leaving a space between the form and the outer shell of the vessel. The form is supported on both sides, to maintain the distance between the form (20) and the outer shell (12), and to prevent collapse or implosion of the form. Then, a pumpable casting composition having a smooth and easy flow is injected between the form (20) and the shell (12), and allowed to harden. The use of the pumpable composition significantly shortens the time required to form the liner.
摘要:
It was difficult until now to carry out intermediate repairs of monolithic refractory lining walls of steel casting and handling ladles when the slag area of the lining was worn before other areas. According to this new process for reconstructing the refractory lining in the upper area of the wall, repairs may be economically carried out in that the gap between the lower end of the template and the lining that projects under the area to be reconstructed is sealed by inflating a hose-like sealing body (7) and by deflating again the sealing body (7) before removing the template. This process is useful for steel casting and handling ladles and for similar metallurgical vessels.
摘要:
Cette installation comporte un moule de forme (1, 2) adapté à la géométrie du conteneur (C) et réalisé en plusieurs éléments pour permettre une libre dilatation du moule en cours d'utilisation, des moyens (3, 4, 5) de support et de manutention du moule (2,3), des moyens (6,14) de centrage et de fixation du moule par rapport au conteneur (C) de manière à ménager entre la paroi interne du conteneur (C) et le moule un espace destiné à recevoir le béton réfractaire, et des moyens (7,8,11) d'alimentation dudit espace en béton réfractaire.