摘要:
The present invention provides a stirrer for manufacturing glass including a stirrer shaft and a multi-staged rod-shaped stirrer blade fixed so as to penetrate through the stirrer shaft. This stirrer blade is a hollow cylindrical body including: a cylinder obtained by seam welding of two opposing sides of a flat plate made, for example, from strengthened platinum containing platinum or a platinum alloy as a matrix and metallic oxide dispersed in the plate; and a disk welded to an entire circumference of both ends of the cylinder and made from an identical material, and it penetrates so that a weld line crosses a center axis of the stirrer shaft, and is fixed so that a locus of an end portion of the blade forms a spiral shape. In addition, the rod-shaped stirrer blade has a core layer showing a dispersed structure that exists in a cross-sectional structure at a fixing portion with the stirrer shaft and does not receive heat effect resulting from fixing. The present invention is effective in stirring of molten glass having high viscosity, and has enhanced stirring operation and improved durability against deformation and damage.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Homogenisieren einer Glasschmelze und die Verwendung derselben. Dazu ist mindestens eine Rührvorrichtung vorgesehen, die eine in Umlaufrichtung (U) drehbare Rührwelle (10) und eine Vielzahl von Rührerflügeln (11, 11 ', 11 ") aufweist. Die Rührerflügel sind entlang der Rührwelle beabstandet zueinander angeordnet sind, um eine im Wesentlichen axial ausgerichtete Förderwirkung auf die Glasschmelze zu einem Auslass hin zu erzeugen. Zur Verbesserung der Homogenisierung bei gleichzeitiger Einsparung von Edelmetall-Material sind die Rührerflügel (11, 11 ', 11 ") paddelförmig ausgebildet und mit Einbauelementen (11E) versehen. Das jeweilige Einbauelement (11E) weist eine Kante (11K) auf, die sich von der Rührerwelle (10) in radialer Richtung (R) entlang der Paddelfläche (11B) mit einer Kantenlänge erstreckt, die um einen vorgebbaren Abstand (X) geringer als die in radialer Richtung (R) sich erstreckende Länge (L) der Paddelfläche (11B) ist. Dies bewirkt eine deutliche Verminderung von Blasenbildung. Die Einbauelemente (11E) werden vorzugsweise jeweils hinter der nicht-angeströmten Paddelfläche (11B) angeordnet.
摘要:
A stirring device 100 comprises a chamber 101, and a stirrer 102 for stirring molten glass 7 in the chamber 101. The stirrer 102 has a shaft 105 as a rotation axis, and blades 106a-106e disposed in a plurality of tiers on a side wall of the shaft 105. The blades 106a-106e have support plates 108 and ancillary plates 109. The ancillary plates 109 create, in the molten glass 7, a flow in the radial direction of the shaft 105.
摘要:
Delivery apparatus include an electrical circuit configured to heat a linear conduit and an elbow conduit. A first electrode can be mounted to an upstream portion of the linear conduit, a second electrode can be mounted downstream of the upstream portion, and a third electrode can be mounted to a curved segment of the elbow conduit within a footprint extension of a first passage of the linear conduit. In further examples, a delivery apparatus includes an electrical circuit with a first electrode mounted to an upstream portion of a linear conduit, a second electrode mounted to a downstream portion of the linear conduit, and a third electrode mounted to an elbow conduit. In still further examples, methods of heating molten glass include application of an electrical current such that neither a current flux through a linear conduit nor a current flux through an elbow conduit exceeds 8 amps/mm 2 .
摘要翻译:输送装置包括构造成加热线性导管和弯管导管的电路。 第一电极可以安装到线性导管的上游部分,第二电极可以安装在上游部分的下游,并且第三电极可以安装到肘管的弯曲部分,在第一通道的覆盖区延伸部分内 的线性导管。 在另外的示例中,输送装置包括电路,其具有安装到线性导管的上游部分的第一电极,安装到线性导管的下游部分的第二电极和安装到弯管导管的第三电极。 在另外的实例中,加热熔融玻璃的方法包括施加电流,使得通过线性导管的电流通量和通过弯头导管的电流通量都不超过8安培/ mm 2。
摘要:
A substantially-isolated/controlled, limited-volume, gas-filled space (e.g., 113b) is formed over at least one free (open) surface of flowing molten glass in a manufacturing line used to produce glass sheets (137), e.g., a manufacturing line employing the fusion process to produce glass sheets suitable for use as substrates for liquid crystal displays. At least a portion of the space comprises a platinum-group metal, e.g., a platinum-rhodium alloy, which can serve as a source of platinum-group condensate defects. The use of the substantially-isolated/controlled, limited-volume, gas filled space substantially reduces the level of such platinum-group condensate defects in the glass sheets, e.g., by more than 50%.
摘要:
The present invention is directed toward a method of reducing contamination of a glass melt by oxide particulates, such as particulates of platinum oxide, which may condense on the inside surfaces of a stir chamber, particularly the stir shaft, and fall back into the glass melt. The method includes causing a flow of gas through an annular space between the shaft and the chamber cover. In one embodiment, the flow of gas through the annular space is caused by drawing a vacuum in the chamber. An apparatus for practicing the method is also provided.
摘要:
A charged glass raw material B is melted in a melting tank 10 by heating with a burner 31 and by heating with electrodes 12, to form molten glass G. Then, the molten glass G flows into a tank additionally provided as a noble gas dissolving tank 20 through a throat 40. The noble gas dissolving tank 20 is provided with a noble gas dissolving device 53, and the noble gas dissolving device 53 is provided with sixteen noble gas inlets 22 for introducing a helium or neon gas supplied to a hearth through heat resistant gas introduction tubes 21 into the noble gas dissolving tank 20. Bubbles of a helium gas A having a purity of 99% are blown out from the noble gas inlets 22 in volumes such that the bubbles have an average diameter of 80 mm or less in the molten glass G.
摘要:
Die Erfindung betrifft ein Bauteil für eine Vorrichtung zum Behandeln von Schmelzen, insbesondere von Glasschmelzen; mit einem Grundkörper aus Metall oder einer Metallegierung; mit einem Kühlsystem, bei dem ein Kühlmedium zum Abführen von Wärme durch das Bauteil hindurchgeleitet wird; der Grundkörper ist mit einer Beschichtung aus einem Material versehen, dessen Zersetzungstemperatur unter der Temperatur der Schmelze liegt; das Kühlsystem ist derart gestaltet und angeordnet, daß die Temperatur der das Bauteil unmittelbar umgebenden Grenzschicht der Schmelze unterhalb der Zersetzungstemperatur des Beschichtungsmaterials liegt.