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How does cullet help the raw materials melt more quickly in a glass furnace?

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Cullet, which consists of crushed or rejected glass, is a vital component in industrial glassmaking that typically makes up 25 to 60 percent of a glass batch.1

It facilitates the melting process because it begins to melt earlier than the raw mineral ingredients in the furnace. As the cullet liquefies, it brings the surrounding mineral particles together, which promotes and accelerates the necessary chemical reactions required to form glass.12