A glass forming furnace includes a forming zone, a cleaning zone, a plurality of sealing doors, and a conveying channel. The forming zone includes a pressure device. The pressure device includes a servo motor, a push rod, and a mold pressurizing mechanism. The push rod is connected with the servo motor. The push rod includes an end notch and an embedded structure. The mold pressurizing mechanism includes an inlet notch. The inlet notch is connected with the embedded structure. Wherein, the end notch is in contact with the inlet notch. The cleaning zone includes an active brush mechanism. The sealing doors are disposed at an inlet and an outlet of the forming zone, respectively. The sealing doors each include a valve. The valve has a cross-sectional thickness that is gradually decreased from top to bottom. The conveying channel passes through the forming zone and the cleaning zone. The conveying channel is configured to convey a plurality of glass forming molds. The beneficial effect of the present invention is that the heating zone can be sealed and the molds can be cleaned more effectively.

A glass forming furnace includes a forming zone, a cleaning zone, a plurality of sealing doors, and a conveying channel. The forming zone includes a pressure device. The pressure device includes a servo motor, a push rod, and a mold pressurizing mechanism. The push rod is connected with the servo motor. The push rod includes an end notch and an embedded structure. The mold pressurizing mechanism includes an inlet notch. The inlet notch is connected with the embedded structure. Wherein, the end notch is in contact with the inlet notch. The cleaning zone includes an active brush mechanism. The sealing doors are disposed at an inlet and an outlet of the forming zone, respectively. The sealing doors each include a valve. The valve has a cross-sectional thickness that is gradually decreased from top to bottom. The conveying channel passes through the forming zone and the cleaning zone. The conveying channel is configured to convey a plurality of glass forming molds. The beneficial effect of the present invention is that the heating zone can be sealed and the molds can be cleaned more effectively.

Provided is a manufacturing method for a glass article, including: a filling step (S1) of interposing a powder (P), which is to be diffusion-bonded through heating, between a transfer container (7, 16) and a refractory brick (8a, 8b, 17a, 17b); a pre-heating step (S2) of heating the transfer container (7, 16) after the filling step (S1); and a molten glass supply step (S5) of, while heating the transfer container (7, 16), causing a molten glass (GM) to pass through an inside of the transfer container (7, 16) after the pre-heating step (S2). In this method, the molten glass supply step (S5) includes diffusion-bonding the powder (P) to form a bonded body (10, 20) configured to fix the transfer container (7, 16) to the refractory brick (8a, 8b, 17a, 17b).

A glass forming furnace includes a forming zone, a cleaning zone, a plurality of sealing doors, and a conveying channel. The forming zone includes a pressure device. The pressure device includes a servo motor, a push rod, and a mold pressurizing mechanism. The push rod is connected with the servo motor. The push rod includes an end notch and an embedded structure. The mold pressurizing mechanism includes an inlet notch. The inlet notch is connected with the embedded structure. Wherein, the end notch is in contact with the inlet notch. The cleaning zone includes an active brush mechanism. The sealing doors are disposed at an inlet and an outlet of the forming zone, respectively. The sealing doors each include a valve. The valve has a cross-sectional thickness that is gradually decreased from top to bottom. The conveying channel passes through the forming zone and the cleaning zone. The conveying channel is configured to convey a plurality of glass forming molds. The beneficial effect of the present invention is that the heating zone can be sealed and the molds can be cleaned more effectively.

A glass forming furnace includes a forming zone, a cleaning zone, a plurality of sealing doors, and a conveying channel. The forming zone includes a pressure device. The pressure device includes a servo motor, a push rod, and a mold pressurizing mechanism. The push rod is connected with the servo motor. The push rod includes an end notch and an embedded structure. The mold pressurizing mechanism includes an inlet notch. The inlet notch is connected with the embedded structure. Wherein, the end notch is in contact with the inlet notch. The cleaning zone includes an active brush mechanism. The sealing doors are disposed at an inlet and an outlet of the forming zone, respectively. The sealing doors each include a valve. The valve has a cross-sectional thickness that is gradually decreased from top to bottom. The conveying channel passes through the forming zone and the cleaning zone. The conveying channel is configured to convey a plurality of glass forming molds. The beneficial effect of the present invention is that the heating zone can be sealed and the molds can be cleaned more effectively.

A glass furnace including an additive-containing product including an additive selected from: phosphorus compounds other than glasses and vitroceramics, tungsten compounds other than glasses and vitroceramics, molybdenum compounds other than glasses and vitroceramics, iron in the form of metal, aluminum in the form of metal, silicon in the form of metal, and their mixtures, silicon carbide, boron carbide, silicon nitride, boron nitride, glasses including elemental phosphorus and/or iron and/or tungsten and/or molybdenum, vitroceramics including elemental phosphorus and/or iron and/or tungsten and/or molybdenum, and their mixtures, and having the following chemical analysis, exclusively of the additive, as a percentage by weight on the basis of the oxides: Cr.sub.2O.sub.3?2%, and Cr.sub.2O.sub.3+Al.sub.2O.sub.3+CaO+ZrO.sub.2+MgO+Fe.sub.2O.sub.3+SiO.sub.2+TiO.sub.2?90%, and Cr.sub.2O.sub.3+Al.sub.2O.sub.3+MgO?60%, the content by weight of additive being in the range 0.01% to 6%.

A process for producing a glass melting component composed of refractory metal. A surface zone of the glass melting component is densified at least in sections by application of local compressive stress. As a result the surface zone has its porosity reduced compared to a volume section which is located underneath the surface zone and which has residual porosity.

A process for producing a glass melting component composed of refractory metal. A surface zone of the glass melting component is densified at least in sections by application of local compressive stress. As a result the surface zone has its porosity reduced compared to a volume section which is located underneath the surface zone and which has residual porosity.

Provided is a method of producing a glass article, including: a melting step of heating molten glass (Gm) in a glass melting furnace (2) through application of a current with electrode groups (13) to (16) including a plurality of electrodes (A) to (H) connected to a common power supply system; and a forming step of forming a glass fiber (Gf) from the molten glass (Gm) heated in the melting step. The melting step includes: a measurement step of measuring ground voltages of the electrodes (A) to (H) included in the electrode groups (13) to (16); and a determination step of determining leakage glass (Gx) from the glass melting furnace (2) based on variations in the ground voltages measured in the measurement step.

An exhaust stack for a submerged combustion melter includes a lower flue, an upper flue, an expansion joint between the lower and upper flues, and a hood. The lower flue is coupled to a tank of a submerged combustion melter and the upper flue and the lower flue are compliantly coupled together by the expansion joint. The hood is coupled to the upper flue and includes a circumferential shell that defines one or more diluent inlets for introducing a diluent directly into an exhaust material flowing through the exhaust stack. The exhaust material may also additionally be cooled in the lower flue, the upper flue, or both, prior to the exhaust material flowing through the hood. A submerged combustion melting system that includes a submerged combustion melter and the exhaust stack, as well as a method of cooling an exhaust material that exits a submerged combustion melter, are also disclosed.