Temperature control of the counterflows of molten metal in...

C - Chemistry – Metallurgy – 03 – B

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C03B 18/02 (2006.01) C03B 18/04 (2006.01) C03B 18/18 (2006.01)

Patent

CA 1095247

ABSTRACT In the float process for flat glass manufacture, on a molten metal bath there is forward flow of molten metal entrained by accelerating glass over an upstream return flow of cooler molten metal which is received in a deepened region of the bath. Contact of the cooler molten metal with molten metal in the deepened region heats the cooler molten metal and local temperature variations in the molten metal are minimised. Upstream molten metal flows are drawn from that deepened region to replenish the molten metal entrained by the accelerating ribbon of glass, so that the risk of local temperature variations in the molten metal supporting the accelerating ribbon is reduced and distortion in the undersurface of the ribbon is minimised.

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