Abstract:
Process and installation for repairing the refractory surface of a converter (1), in which the slag therein contained is moved to make it splash against defined zones of the refractory walls (8) of the converter (1), said movement being obtained by means of a gas flow blown under the surface of the slag through a plurality of conduits (7) placed within the refractory walls (8).
Abstract:
The invention concerns a refractory ceramic compound for lining the floors of electric-arc furnaces, the compound consisting of a refractory matrix material containing a certain proportion of finely divided metallic iron.
Abstract:
Ein Verfahren bezieht sich insbesondere auf die Ausbesserung einer Feuerfestauskleidung eines metallurgischen Gefässes (10) im heissen Zustand. Diese Ausbesserung erfolgt dabei mittels einer Auftragevorrichtung (15). Zudem wird mittels einer Einrichtung (20) eine Erfassung zumindest der verschlissenen Bereiche und eine Überwachung der Ausbesserung durchgeführt. Dabei wird vor, während und/oder nach dem Auftragen zumindest ein Teilbereich der auszubessernden Stellen (13) der Feuerfestauskleidung (12) des Gefässes (10) bzw. der Spritzstrahl (18) fotographisch mit Visualisierung der Temperaturbereiche (26, 27, 28) erfasst und daraus erfolgt eine Auswertung hinsichtlich verschiedener Parameter, wie Eigenschaften, Schichtdicke und/oder Verteilung des Auftragsmaterials. Es hat sich herausgestellt, dass durch diese Visualisierung der Temperaturbereiche der auszubessernden Stellen bzw. des Feuerfestmateriais beim Auftragen verschiedene Parameter sehr genau festgestellt werden können und sich daraus eine optimales Beschichten der Ausmauerung erzielen lässt.
Abstract:
A prefabricated part made of vitreous fused silica for use as a refractory, in particular for repairing coke ovens, contains over 90 % by weight SiO2. It is constituted of 20 to 50 % by weight vitreous fused silica with 1 to 6 mm grain size, 20 to 40 % by weight vitreous fused silica with 0.1 to 1 mm grain size, 15 to 35 % by weight finely ground vitreous fused silica with 100 % of the grains less than 0.1 mm in size, 1 to 10 % most finely ground vitreous fused silica with a specific surface area according to BET larger than 20 m per gramm, 1 to 10 % by weight cement and 0.1 to 8 % by weight of a phosphorous compound, in particular sodium polyphosphate.
Abstract:
The object of this invention is a method to remove demolishing debris (11) that comes from the sediments (2) and/or demolished lining (3") from rotary kilns (1) in such cases where the shut-down of the kiln and the cooling down and the opening of the kiln by removing the front wagon (4) or corresponding structure from its place are included in the procedure. In the method according to the invention the demolished debris (11) that comes from the sediments and the demolished lining is apportioned into a breaker (10) that breaks this debris down to crushed material (12). The crushed material is moved from the breaker through a suck hose (8) into a suck apparatus (7), like advantageously into a suck vehicle.
Abstract:
A lining (100) for producing a monolithic refractory lining (3) for a casting ladle, comprising small-sized templates (20) which are located on the periphery of the template body (11) approximately at the same level as the subsequent base (8) and which can be displaced beyond the periphery of the template body and retracted inside the periphery (11'). The templates can be used to make recesses (21) in the lining (3) of the side wall (42) to accommodate refractory material for the base (8) whereby said material is subsequently introduced and forms anchoring or locking elements which are used to secure the base (8) additionally to the lining (6) of the side wall (42).
Abstract:
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.