Abstract:
A method for the production of construction articles and preparation of a mixture for making them from a clay raw material, providing for production of two kinds of granules: one from a mixture of clay, limestone and coal, and the other from clay, and burning them using said coal up to different temperatures. Then the burnt product is moistened and construction articles are formed, for example bricks, with subsequent treatment in an autoclave or a steam chamber. A technological line is also proposed, as well as a method for burning a mixture and a construction article obtained by said method, and a device for burning characterized by the absence of a heat-resistant lining.
Abstract:
Dans une brique crue contenant du combustible, le combustible est inclus dans le centre cependant que les zones de bord restent libres. Il est possible de cette maniere d'arriver a une concentration de combustible suffisante pour pouvoir renoncer a l'apport d'energie exterieure dans le chauffage du four tunnel. L'inclusion du combustible se fait dans une extrudeuse. On introduit le combustible au centre de la masse a extruder dans l'extrudeuse entre son alimentation et son orifice de sortie. De telles briques crues apportent un resultat remarquable du point de vue de la combustion.
Abstract:
A method for forming particles having a ridge portion includes inducing flow of a slurry of particles and a reactant through one or more orifices, detaching an amount of the slurry from the slurry flow following exit from the one or more orifices, the detached amount forming a slurry body, forming the slurry body into a particle shape, contacting the particle shaped slurry body with a coagulation solution to form a stabilized particle having the ridge portion, and drying and/or sintering the particle having the ridge portion.
Abstract:
Disclosed herein is a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate. Also disclosed are porous ceramic honeycomb structures comprising a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate and methods of preparing a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate.
Abstract:
A method for processing fines materials generated as a by-product from the screening and washing of sand and gravel includes the steps of drying, pelletising and firing the fines materials to produce a ceramic material in the form of porous pellets which have enhanced properties for the removal of phosphorus and pathogens from wastewater.
Abstract:
The present invention relates to refractories with a composition gradient for lining the interior surface of combustion chambers. The invention envisages the use of refractories characterized by the presence of a number of layers with a different chemical composition to form a gradient along the cross section of the material. The presence of the composition gradient serves to combine the corrosion resistance of the surface layer, facing towards the inside of the combustion chamber, with the shock resistance of the bulk material.
Abstract:
The production of calcined clay is effected by using a plant known per se for producing cement by the dry or semiwet process, with a precalciner (1), for instance comprising at least one preheating line of series-connected preheating stages (2), such as cyclone preheaters or grate preheaters, and a rotary kiln or roaster (3). In accordance with the invention, the rotary kiln or roaster (3) for generating heating gas is utilized as combustion chamber (31), replaced by a combustion chamber (3') and/or completed by an additional combustion chamber.
Abstract:
A refractory material used in refractory furnace liners, combustion chambers, baffles and artificial fire logs includes alumina silicate; an additive comprising at least one of silicon carbide, silicon nitride, boron carbide, boron nitride and silicon carbo-nitride; and a binder. The refractory material is light weight, has a high noise reduction capacity, is fire resistant and has a reduced silica content. In a most preferred embodiment, the additive makes up 50.0% to 55.0% of the material by weight, the binder makes up 4.5% to 5.0% of the material by weight and the linear shrinkage of the material is no greater than 3.5% at 2600° F. A preferred binder is colloidal silica although many others are suitable. Preferably, the material is free of cellulose fiber and sodium silicate.