Which processes are used in the production of glass bottles
1. raw material pre-processing. The bulk material (quartz sand, soda ash, limestone, feldspar, etc.) is pulverized to dry the wet raw material, and the iron-containing raw material is subjected to iron removal treatment to ensure the quality of the glass.
2. batch preparation.
3. melting. The glass batch material is heated at a high temperature (1550~1600 degrees) in a pool kiln or a pool furnace to form a liquid glass which is uniform, free of bubbles and meets the molding requirements.
4. molding. The liquid glass is placed in a mold to form a glass product of a desired shape, such as a flat plate, various utensils, and the like.
5. heat treatment. Through the processes of annealing, quenching, etc., the stress, phase separation or crystallization inside the glass is eliminated or generated, and the structural state of the glass is changed.