1) Raw materials

The raw materials mainly include quartz sand, calcium carbonate and etc., which are essential for the production of optical glass materials. We adapted bagged raw materials to ensure minimal unnecessary evaporation of dust and waste of raw materials.

2) Ingredients

Accurate weighing of raw materials is the prerequisite for the normal operation of the production line and an important guarantee for product quality. Homogenization among various raw material components is essential to ensure that the batch material can react, melt, and produce well. It is an important condition for forming the required optical glass phase, ultimately leading to the formation of optical glass.

3) Melting

The core step of optical glass production lies in the smooth progression of the melting reaction, which is a highly complex process encompassing a series of physicochemical reactions. As a result, the mechanical mixture of various raw materials transforms into a molten optical glass liquid.

The clarification process of optical glass melt is an important part of the melting process of optical glass, and it is a crucial step to ensure the yield and quality of optical glass products. The clarification process mainly refers to the removal of bubbles and the discharge of generated gases from optical glass.

The main chemical reactions involved in the melting stage are:

Na₂CO₃+ SiO₂ = Na₂SiO₃ + CO₂↑

CaCO₃ + SiO₂ = CaSiO₃ + CO₂↑

CaCO₃ =¹ CaO+CO₂↑

CaNa₂(CO₃)₂+ Na₂CO₃+ 3SiO₂= 2NaSiO₃+ CaSiO₃+ CO₂↑

Na₂B₄O₇·5H₂O =² Na₂O+2B₂O₃+5H₂O

4KNO₃＝2K₂O +4NO↑+3O₂↑

K₂CO₃＝K₂O+CO₂↑

1. with high temperature ↩︎
2. with high temperature ↩︎

4) Forming

Homogenization of optical glass melt: It primarily refers to the process step where the entire optical glass melt is homogenized through the feeder, achieving a certain degree of uniformity in chemical composition, so that the thermal expansion coefficient, stress, optical constants, etc. of the optical glass exhibit uniform and constant values.
Cooling and forming: The optical glass liquid is cooled by circulating water until it reaches the forming viscosity, at which point it forms into optical glass.

5) Cutting

Utilize the residual heat of the glass and the cooling effect of cold water and wind to break the glass, and stack the products according to specifications. Collect the broken glass and defective products and send them to the batching room for crushing and reuse.

6) Inspection:

Quality inspectors conduct inspections on the light, appearance, and dimensions of products according to the quality standards specified by the enterprise.