Abstract: The present invention pertains to a gas purging device for introducing gases and/or solid reactants into the metal melt of a metallurgical crucible, consisting of a gas purging plug, a well nozzle sleeve surrounding it, and/or a well nozzle surrounding the plug or the nozzle brick, with a mounting device arranged in the area of the respective end face.

Abstract: The present invention pertains to a process for preparing a benzo(a)pyrene-free, carbon-containing, refractory ceramic material that can subsequently be used for preparing ceramic preforms.

Abstract: The present invention pertains to a refractory casting slip consisting of a refractory matrix material and a finely divided reactive component, as well as a hydraulic binder and various additives, which can be discharged as a free-flowing mass upon addition of water.

Abstract: The present invention pertains to a gas purging plug for metallurgical vessels with a gas connection pipe at the gas inlet-side, lower end.

Abstract: The present invention pertains to a gas purging plug with integrated electrode for use in electric-arc furnaces.

Abstract: The present invention pertains to a process for purifying the exhaust air from plant parts of oil mills, in which the exhaust air removed from the plant is returned, after part of it had been discharged, into the plant in a cycle.

Abstract: A process for producing a plug with increased resistance to infiltration and oriented porosity for use in metallurgical melting crucibles, in which the matrix material of the plug is subjected to an impregnating treatment.

Abstract: The invention concerns a gas plug for metallurgic smelting crucibles with a sheet-metal sheathing that comprises at least the gas connection side part of the outer surface and the bottom, with the exception of an area for connecting the gas supply means.

Abstract: The invention concerns a procedure for manufacturing fireproof ceramic molded parts, particularly of high alumina content based materials.

Abstract: A process for producing refractory, carbon-bonded ceramic moldings includes spraying a low-viscosity organic containing carbon containing binder onto a coarse fraction of a refractory component, the coarse fraction having a particle size larger then 0.5 mm while maintaining the coarse refractory fraction having a particle size smaller then 0.5 mm onto the coated granules, pressing the granules thus produced into moldings, and subsequently curing the organic binder in the moldings, and tempering or firing the moldings.

Abstract: The invention relates to a keystone set for installation in the transition region between two sections of an arch-shaped support structure, the set consisting of two transition stones, between which at least one keystone is axially insertable.

Abstract: The invention concerns a fireproof ceramic terminal brick for a tapping system in particular in steel converters or electric furnaces composed of several fireproof ceramic founder's bricks arranged in a row, together enclosing a passage opening for the steel smelt, thereby characterized in that the terminal brick is formed in two pieces vertical to the direction of flow of the steel smelt and the lower section in the direction of flow of the smelt is formed as a cylindrical body that can be pressed firmly against the upper section of the terminal brick, arranged above it, in such a way as to seal but remaining detachable from it.