(1) Pre-processing of raw materials. Massive raw materials (quartz sand, soda ash, limestone, feldspar, etc.) are crushed to dry wet raw materials. Iron-containing raw materials are removed to ensure glass quality.
(2) Preparation of batch.
(3) Melting. Glass batch is heated at high temperature (1550-1600 degrees) in a tank kiln or furnace to form uniform, non-bubbly liquid glass which meets the forming requirements.
(4) Forming. The liquid glass is put into the mould to make glass products of the desired shape, such as flat plates, various utensils, etc.
(5) Heat treatment. By annealing and quenching, the stress, phase separation or crystallization in the glass can be eliminated or produced, and the structural state of the glass can be changed.
