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glassware production process

Glassware production process include:

① pre-processing of raw materials. The raw materials (quartz sand, soda ash, limestone, feldspar, etc.) are pulverized to dry the damp raw materials, and the iron-containing raw materials are iron-treated to ensure the quality of the glass. 
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② with the material preparation.

③ melting. Glass batch in the pool or pool furnace for high temperature (1550 ~ 1600 degrees) heating, so that the formation of uniform, no bubbles, and meet the requirements of the liquid glass molding.

④ molding. The liquid glass is put into a mold to form a glass article of a desired shape, such as a plate, a variety of vessels, and the like. 
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⑤ heat treatment. By annealing, quenching and other processes to eliminate or produce glass internal stress, phase or crystallization, and change the structure of the glass state.