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® Document Number: 909 R 5003 <br /> PILKINGTON <br /> Procedure Rev: 5 Date: 5/24/07 <br /> EMERGENCY RESPONSE PROCEDURES <br /> Building Products <br /> Batch Material Storage Silos <br /> Batch materials such as sand, soda ash, and limestone are delivered by rail and truck <br /> and stored in large vertical silos. The batch house storage room is where dry glass <br /> colorant chemicals are stored. Chemicals included cobalt oxide and nickel oxide. <br /> Melting Furnace <br /> The glass melting furnace utilizes batch materials in the manufacturing of glass. This is <br /> a continuously operating process. The furnace (ceramic refractory lined) melts and <br /> holds liquid glass. The refractory brick does not contain hexavalent chromium. <br /> As the liquid glass leaves the furnace, it is cooled and formed. The cooling and forming <br /> processes are extensive but are necessary in order to manufacture glass that meets the <br /> required specification. <br /> Glass Forming & Lehr <br /> A number of compressed gases are used in the manufacturing of glass. Their addition <br /> to the process occurs during either the forming of the glass or annealing process. <br /> Sulfur Dioxide (SO2) is injected into the glass bath lift out area beneath the glass sheet <br /> to aid in the prevention of roll marks on the bottom side of the glass, and to prevent the <br /> glass from sticking to the rolls. A S02 dispensing port is located outside the lehr. Two <br /> 1 ton cylinders are located there: one for dispensing and one on standby. There is a <br /> third 1 ton cylinder located about 50 feet away as a back up (not connected). <br /> Glass Capping <br /> The continuous ribbon of glass must be cut into various sizes. The capping table uses <br /> cross cutters to do the cutting across the ribbon, with slit cutters to cut width of the <br /> ribbon. The glass breaks along the line of least resistance when it is flexed over a high <br /> 909R5003 Rev. 5/20/04 <br />