Abstract:
Die Erfindung betrifft feuerfeste Formkörper oder Massen sowie ein Verfahren zur Erzielung einer hochfesten Bindephase in Magnesiumoxid-, Aluminiumoxid-, Zirkonmullit-, Zirkoniumdioxid-, Magnesiumaluminatspinell-, Bauxit-, Yttriumoxid-, Siliziumkarbid-, Siliziumnitrid-, Bornitrid- oder Mischungen davon kohlenstoffgebundenen Erzeugnissen, wie z. B. gepresste kohlenstoffgebundene Steine, kohlenstoffgebundene Schieberplatten oder kohlenstoffgebundene Tauchausgüsse oder gegossene kohlenstoffhaltige und/oder kohlenstoffgebundene Erzeugnisse oder kohlenstoffgebundene Stopfen, mit verbesserten mechanischen, thermischen und chemischen Eigenschaften. Die Bindematrix der feuerfesten Formkörper oder Massen enthält Titankarbid- und/oder Titankarbonitridphasen. Die feuerfesten Formkörper oder Massen sind auf Basis einer verkokten Mischung aus oxidischen und/oder nichtoxidischen und/oder kohlenstoffhaltigen Feuerfestkörnungen und einem Bindemittel aufgebaut, dem feinkörniges Titandioxid oder Ilmenit oder FeTiO 3 oder CaTiO 3 oder MgTiO 3 oder BaTiO 3 , oder eine Kombination davon, oder zusätzlich Partikel ein oder mehrerer elementarer Metalle, zugegeben sind.
Abstract:
Die Erfindung betrifft ein feuerfestes Mauerwerk in einem Industrieofen, in dem zumindest teilweise in oxidierender Ofenatmosphäre Nichteisen-Metalle wie Kupfer, Blei, Zink, Nickel oder dergleichen bei Temperaturen über 700 °C, insbesondere über 900 °C, erschmolzen werden, wobei das Mauerwerk aus ungebrannten Steinen aus feuerfestem Material ausgebildet ist und im feuerseitigen bzw. heissseitigen Oberflächenbereich der Steine des Mauerwerks Kohlenstoff enthalten ist, sowie einen feuerfesten Stein zur Herstellung eines Mauerwerks.
Abstract:
A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB 2 .
Abstract:
A thermally insulating coating material for a refractory containing carbon, characterized in that it comprises hollow refractory particles in an mount of 50 to 97 wt % of the total amount of refractory materials, and clay in a part of or the whole of the balanced amount and in an amount of 30 wt % or less of the above total amount, and a liquid binder in an amount of 20 to 170 wt % of the above total amount. The thermally insulating coating material prevents the oxidation of the surface of the refractory containing carbon and also forms a thermally insulating layer, when the refractory is heated to a high temperature.
Abstract:
A method of manufacturing graphite particles, characterized in that carbon black is graphitized by an induction heating and graphite particles contain at least one or more types of elements selected from among metals, boron, and silicon; a refractory with excellent thermal shock resistance, oxidization resistance, and corrosion resistance, wherein a composition containing fire-resistant aggregate and the graphite particles manufactured by this manufacturing method is formed, whereby the graphitization of the carbon black requiring extremely high temperature in normal heating system can be advanced easily, and the refractory having excellent thermal shock resistance, oxidization resistance, and corrosion resistance and containing less carbon content can be provided.
Abstract:
The invention relates to a sealing compound and to a shaped seal produced using said sealing compound, for use in a high temperature range, i.e. to approximately 1600 DEG C.
Abstract:
The invention relates to a part for the casting of steel, said part comprising a body (2) made of carbon-containing refractory material. The part has a layer (10) which coats partially or completely the body and is appropriate to form a gas impervious layer (10a) which is oxydised and densified when brought to a temperature higher than 1000 DEG C. The layer (10) is comprised of a refractory material having sintering precursors selected in the group comprising calcined alumina, reactive calcined alumina, silica fumes, clays.
Abstract:
The disclosed invention provides a method of forming refractory linings for maintaining refractory linings against attack by corrosive materials such as those present in steel manufacture. The method entails spraying an aqueous mixture of a refractory composition that includes at least one refractory material onto the working surface of a refractory lining. Spraying is performed to provide one or more layers of the refractory composition on the refractory lining after each exposure of the lining to corrosive materials such as those incurred in steel manufacture.
Abstract:
The invention provides methods for producing semi-permanent casting tooling, as well as semi-permanent casting tooling apparatus. Casting tooling including a blend of high char resin and refractory powder; casting tooling prepared from a blend of sol-gel ceramic precursor and refractory powder; and a preform including a leachable core as well as methods for their production are provided. The casting tooling of the invention can be used in casting processes including die casting, permanent mold casting and pressure infiltration casting. Also provided is an investment mold casting technique compatible with a pressure infiltration process.