摘要:
Die Erfindung betrifft ein feuerfestes keramisches Erzeugnis, die Verwendung eines solchen Erzeugnisses, einen Elektrolichtbogenofen mit einem Abstichkanal, ein Verfahren zur Füllung des Abstichkanals eines Elektrolichtbogenofens sowie einen Versatz zur Herstellung eines feuerfesten keramischen Erzeugnisses.
摘要:
The present invention concerns a torpedo ladle (1) for the transportation of molten metal, said torpedo ladle defining an inner cavity (3) and comprising: - an outer shell (1o) defining the outer surface of the torpedo ladle, and an inner liner (1i) comprising refractory bricks, defining the inner surface of the torpedo ladle, and - an opening (5) bringing in fluid communication the outer surface of the torpedo ladle with the inner surface thereof, said opening being located in the central portion of the torpedo ladle and facing upwards when the torpedo ladle is at its filling position, 6f; Characterized in that, the inner surface of the torpedo ladle comprises a corrugated portion (7) located opposite to, and in registry with the opening, the corrugation being characterized by crests (7c) and valleys (7v) extending parallel to the longitudinal axis, X1.
摘要:
It is to provide a refractory having excellent corrosion resistance and economic efficiency. The shaped refractory is made from a fired refractory and an oxide powder, characterized in that a pore volume/pore diameter distribution curve of the shaped refractory has a maximum peak at a pore diameter of not less than 10 µm in a central part located at least 5 mm inward from the surface of the shaped refractory in a normal direction and also a pore volume peak within a pore diameter range of 0.05ˆ¼1.0 µm because agglomerates of the oxide powder are formed in the pores of the fired refractory.
摘要:
Crucible compositions and methods of using the crucible compositions to melt titanium and titanium alloys. More specifically, crucible compositions having intrinsic facecoats that are effective for melting titanium and titanium alloys for use in casting titanium-containing articles. Further embodiments are titanium-containing articles made from the titanium and titanium alloys melted in the crucible compositions. Another embodiment is a crucible curing device and methods of use thereof.
摘要:
Die Erfindung betrifft einen feuerfesten keramischen Boden im Anschlussbereich zu mindestens einer Wand eines Gefäßes zur Behandlung einer Hochtemperaturschmelze.
摘要:
The present invention relates to a process for making a wear lining for casting ladles and pouring boxes used in foundries, in which process the wear lining is formed by introducing into a casting ladle or pouring box a pourable mass consisting of a granular or particulate refractory material that has a low heat conductivity and contains at least 4 wt-% of sodium silicate or potassium silicate and which binds together to form a solid mass in situ by means of a silica- containing gel precipitated from the silicate by the addition of a suitable ester or mixture of esters, optionally combined with the introduction of carbon dioxide. The invention also relates to a process for increasing the service life of the wear lining made in this way by adapting its MgO content according to whether it - the lining - comes into contact mainly with molten metal or molten slag.
摘要:
A method for treating spheroidal graphite iron includes the step: pouring molten spheroidal graphite iron into a pouring electrical furnace (1); covering the molten spheroidal graphite iron (5) with alkali slag (6) which is melted at high temperature and rich in alkali earth metal ion, rare earth metal ion, or mixture of them; connecting the molten spheroidal graphite iron (5) with the negative pole of the direct current source by one pole (7); connecting the alkali slag (6) with the positive pole of the direct current source by another pole (4), treating the molten spheroidal graphite iron (5) with the alkali slag (6) which is used as electrolyte. The method can prevent the spheroidized fading velocity of the spheroidal graphite iron. The pouring electrical furnace can be used for treating the molten spheroidal graphite iron.