Glass Melting Technology: A Technical and Economic ... - OSTI

Seg-Melt: Glass melting furnace that separates the batch material from the cullet in the melting process. See also
batch and cullet.
segmentation: Dividing the melting and refining stages into individual sections or processes (as opposed to
occurring in the same glass tank) in order to achieve increased flexibility, improved process control, and reduced
energy costs.
shear dissolution: The act or process of separating and dissolving batch materials within a glass melt by shear
currents. Shear currents can be increased by the use of bubblers. See also bubblers.
SOx: Sulfur oxides (i.e., SO2). During the glass production process, air emissions such as sulfur oxides are
generated. The U.S. Federal Clean Air Act limits the level of SOx and other pollutants that glass plants can
generate.
SVA (shareholder value analysis or shareholder value added): The process of analyzing how decisions affect
the net present value of cash to shareholders. The analysis measures a company’s ability to earn more than its total
cost of capital. This tool is used at two levels within a company: the operating business unit and the corporation as a
whole.
Tg: Denotes the transformation temperature of a glass, where the second order change from supercooled liquid to
glassy state occurs on cooling.
thermochemical recuperation: Waste heat recovery system where heat is produced via a chemical reaction. See
also recuperative furnace.
throat: A submerged passage connecting the melting end to the working or refining end of a glass-tank furnace.
torr: A unit of pressure equal to 1/760 of an atmosphere (about 133.3 Pa).
TV glass: Refers to the components that make up a television tube including panel, funnel (cone), and neck, or the
batch composition used to produce such components.
VOC (volatile organic compounds): Environmental emissions of chemicals, usually hydrocarbons, in a process.
Waist: A narrow opening, primarily found in float furnaces, between the melting chamber and the thermal
conditioning section of a glass melting furnace. Devices such as blenders or cooling coils are inserted to control
glass flow between the two chambers.
wet chop fiber: Fiberglass strand that has been chopped to specified lengths directly after the application of a sizing
(organic coating) material.
wool insulation: A mass of glass staple fibers of random arrangement bonded in a three-dimensional network. Used
as low-density materials for thermal insulation.
Sources of economic glossary definitions:
Dictionary of Finance and Investment Terms. 6th Edition. Barron’s Educational Series, 2003.
John Colley Jr., Jacqueline L. Doyle, and Robert D. Hardie. Corporate Strategy. The McGraw Hill Executive MBA
Series, 2002. I.J. McColm, Dictionary for Ceramic Science and Engineering, 2 nd ed., Plenum Press, New York
(1993).
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