| 摘要 |
A patching composition for developing a superior bond with silica refractories at temperatures of 1200 DEG to 2400 DEG F. The composition comprises three basic components: (1) a high melting phase, e.g. silica brick, fireclay grog, magnesia or high alumina grain, (2) a bonding component, e.g. sodium silicate and (3) a low melting phase, e.g. window glass. It will generally be desirable to employ a fourth component for fluxing, such as soda ash or other alkaline earth compounds. The improved results are achieved by the use primarily, of a low melting phase such as window glass, bulb glass or lead glass having a softening point between about 900 DEG and 1750 DEG F. (482 DEG to 954 DEG C.), employed in an amount of about 6 to 25% of the total solids composition.
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