Abstract:
An apparatus and method for producing a glass article includes a melting vessel, a fining vessel located downstream from the melting vessel, and a bubbling vessel that is downstream from the melting vessel and upstream from the fining vessel. The fining vessel may include at least a first zone and a second zone downstream from the first zone, wherein the average temperature of the first zone is higher than the average temperature of the second zone.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Bismutoxid-haltigen Glases, die Verwendung eines solchen Verfahrens zur Herstellung von optischen Gläsern, insbesondere Gläsern, welche in der optischen Nachrichtentechnik angewandt werden, sowie ein durch das erfindungsgemässe Verfahren herstellbares Glas. Um eine hohe Oxidationsstufe des Bismuts zu erreichen, wird während das Schmelzvorgangs in die Schmelze Sauerstoff eingeblasen.
Abstract:
A method of minimizing the formation of a rhodium-platinum defect in a glass or glass ceramic material or in the melt thereof is provided. The method includes providing a vessel made of a platinum-rhodium alloy for use in a manufacturing process for obtaining the material, and an interface between the vessel and the melt is present. The method can include providing sufficient partial pressures of hydrogen outside and inside the vessel for controlling the partial pressure of oxygen in a region of the melt adjacent to the interface. A method of minimizing the formation of, or counteracting the impact of, a localized thermal, electrical, or composition cell in the melt during a manufacturing process is also provided. The method can include adding a multivalent compound to the melt, adding a mixer to the finer tube, adding a mixing step to the manufacturing process, or amplifying the mixing.
Abstract:
This invention relates to the continuous production of molten glass for further production of glassware and can be used for glass melting and obtaining glass semiproduct. The technical objective of this invention is to provide a method and a furnace for producing molten glass with stabilized physical properties due to an increased phase boundary area, higher temperature in the glass furnace bath and intensified mixing as well as due to a higher output of the glass furnace. Molten glass layer bubbling glass melting method comprising melting the glass layer in the first chamber of the furnace to the working level, further uninterrupted loading of large and small charge portions into the molten glass layer with simultaneous intense bubbling of the molten glass layer with high-temperature combustion products aiming at the formation of the maximum possible charge/molten glass phase boundary area and achieving a molten glass temperature of at least 1500°C, which conditions intensify the melting, silicate formation, vitrification and homogenizing processes, delivery of the chemically and thermally homogeneous molten glass produced by bubbling to the degassing and cooling section located under the bubbled molten glass layer, with an intense release from the molten glass layer of process gases that pass through the bubbled layer to the space above the layer where the process gases undergo primary cleaning and cooling, and the degassed molten glass is delivered to the further output section.
Abstract:
A process for removing blisters (large bubbles in a glassmelt) and seeds (small bubbles in a glassmelt) from a glassmelt by feeding helium bubbles (6) having a diameter between about 0.5 centimeter and about 3 centimeters at a prescribed flow rate and location to effectively produce a substantially bubble-free article.
Abstract:
The invention relates to a device for homogenising a glass melt. The aim of the invention is to completely avoid using a mechanical agitator or at least to minimise the size and drive power thereof. In order to achieve this, the inventive device is provided with the following elements: 1.1) a container constructed according to the Skull principle; 1.2) a high frequency coil for coupling electric energy into the container.