Abstract:
The present invention relates to a melter assembly (1) for melting solid raw batch material, which comprises a submerged combustion melter section (3) and an afterburner section (5), wherein the submerged combustion melter section is designed to contain the melt bath (4) at a maximum melt level (4') and comprises at least one submerged combustion burner (21) and a melt outlet (9), and wherein the afterburner section (5) is designed as a space contiguous with, and in continuity of, the internal space defined by the submerged combustion melter section (3), and arranged over the maximum melt level (4') of the submerged combustion melter section (3). The afterburner section (5) is dimensioned such that the gases escaping from the melt bath (4) remain for at least 2 seconds at a temperature of at least 850 °C in said afterburner section (5), prior to being evacuated to the environment. The invention also relates to a process making use of such melter assembly (1).
Abstract:
The invention relates to a submerged combustion burner (1) and to a melter comprising submerged combustion burners (1). The burner comprises a substantially parallelepipedic body, the melt oriented face of which shows a longitudinal slot, two opposite walls of the slot comprising a series of nozzles each supplied separately with fuel and oxygen containing gas. The slot advantageously shows a narrow opening comprised between 10 and 30 mm, preferably between 15 and 25 mm, most preferably about 20 mm. The burner is advantageously made of steel plates, preferably high temperature resistant steel. The walls of the slot as well as the melt oriented face of the burner are advantageously cooled. According to the invention, the parallelepipedic burner body comprises a first external longitudinal volume showing a generally U-shaped cross-section and a second internal longitudinal volume fitted within the said first external longitudinal volume, showing also a generally U-shaped cross-section, one of the longitudinal volumes comprising a connection to a supply of oxygen and the other comprising a connection to a supply of fuel gas. The ends of the branches of the longitudinal volumes are connected to the burner nozzles. A flange is arranged around the parallelepipedic burner body at a distance from the melt oriented face of said body.
Abstract:
A prefiner (28) is described and includes a chamber (34) for receiving molten glass exiting a submerged combustion melter. The prefiner (28) also includes a foam breaker (36) and an exit conduit (38). The molten glass holding chamber includes a top portion (42), a bottom portion (40), and an enclosing sidewall (44). The top portion (42) includes an opening to accommodate the foam breaker (36), which is positioned to break the glass bubbles within the chamber. The exit conduit (38) resides within the chamber (34) and is in fluid communication with an outlet (68) in the sidewall (44). The exit conduit (38) is positioned to permit molten glass to flow from the lower section of the chamber to the outlet (68) and to the next stage of processing, typically a finer.
Abstract:
Vitrified products are manufactured using a melt produced from batch materials comprising 35 to 100 w% man-made mineral fibers produced in a submerged combustion melter.
Abstract:
Submerged combustion burners having a burner body, a burner tip connected thereto. Submerged combustion melters including the burners and methods of using them to produce molten glass. The burner body has an external conduit (10) and first and second internal conduits (14) substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. The burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip. The burner tip includes a crown portion defining a circumferential concavity (50).
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 burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.
Abstract:
A submerged combustion melter having a plurality of side walls, a bottom wall adjacent the side walls, and a top wall adjacent the side walls, the walls collectively enclosing a melting chamber, and the bottom wall forming a plurality of openings, each of which is adapted to receive a submerged combustion burner. Each of the submerged combustion burners is positioned at least 4 inches from the side walls, at least twice as far apart from each other as the distance between the submerged combustion burners and the side walls, and less than or equal to about 20 inches apart.
Abstract:
L'invention concerne un four pour la fusion en continu d'une composition comprenant de la silice, ledit four comprenant au moins deux cuves en série, lesdites cuves comprenant chacune au moins un brûleur immergé dans les matières fondues. L'invention concerne également le procédé de fabrication de compositions comprenant de la silice à l'aide du four, la silice et du fondant de la silice étant enfournés dans la première cuve. L'invention est spécialement adaptée à la réalisation de frittes pour remaillage des céramiques (grès, faïences, terres cuites) avec une forte productivité, de basses températures et permet de faibles temps de transition.
Abstract:
The invention concerns a method for making compounds based on silicate(s) of alkaline such as Na, K and/or of alkaline-earth such as MgO, CaO and/or of rare earths such as Ce, optionally in the form of mixed silicates combining those, by converting silica and halides, in particular chloride(s), or sulphates or nitrates of said alkalis and/or said rare earths and/or said alkaline-earths, such as NaCl, KCl, CeCl4. The thermal input required for the conversion is supplied, at least partly, by an immersed burner or burners. The invention also concerns an implementing device and the use thereof.