Mechanics of Glass Processes

SLAG GLASS-CERAMIC

Slag glass-ceramic is a modern highly durable and decorative material suitable for arranging external and internal walls of buildings and structures, lining for protecting against dry and hydroabrasive wear of diverse surfaces in technology. Slag glass-ceramic has no foreign analogs as it was developed in our country and is not manufactured in other countries. Slag glass-ceramic is a glass ceramic material of a fine-grain structure produced by means of oriented crystallization of glass on the basis of blast-furnace slag.

Low-cost starting material, highly mechanized method of production along with high performance render the slag glass-ceramic competitive with respect to traditional materials in similar application. Slag glass-ceramic is a chemically stable wear-resistant waterproof material featuring high mechanical strength and hardness. It has practically unlimited service life, since its properties do not change over time. The high resistance to the effect of abrasive and corrosive media makes it possible to efficiently use slag glass-ceramic in lining the hoppers, troughs, chutes, flotation machine housings, funnels, classifiers, chemical apparatus, gas ducts, as well as of inclined flyovers and other structures in mineral concentration, chemical, electrical engineering, metallurgical, power and other industries and in agriculture. The structures fabricated with the use of slag glass-ceramic meet the stringent sanitary requirements.

Industrial processes are numerous and depend on the application (glazing, containers, fibres, etc.).

All processes require a furnace with a high capacity, a long production line for upstream operations (batching, melting, fining, forming and annealing), while downstream operations (reheating, forming, molding, coating, tempering, laminating) can be performed on-site or off-site.

All these operations require a deep understanding and application of mechanics. At elevated temperatures, viscosity controls the homogeneity of the glass melt, the flatness of the glass while the thermomechanical properties determine the strength of the refractories used to fabricate the tools. At lower temperatures the tribological resistances of glass products will control surface quality and strength of the manufactured objects (flat glass, containers).

Four primary operations for glass manufacturing are: batching, melting, fining and forming.

Batching, melting and fining operations are common to all glass manufacturing processes with some variations according to the furnace type. The forming and post process depend on the end product.

Дата добавления: 2015-01-03