Low Iron Low Fe2o3 Limestone sand for Glass Making

1、 As a stabilizer to enhance glass performance

Limestone (mainly composed of calcium carbonate) decomposes into calcium oxide (CaO) at high temperatures, which reacts with silicon dioxide (SiO ₂) in glass to form calcium silicate (CaSiO3). This reaction can significantly improve the chemical resistance of glass and extend its service life. If limestone is lacking, glass is susceptible to corrosion from acidic and alkaline substances in the environment, leading to a decrease in durability.

Calcium ions (Ca ² ⁺) can promote the rearrangement of glass network structure, eliminate internal stress, reduce light scattering and reflection, thereby enhancing transparency and optical uniformity. Meanwhile, calcium ions can also inhibit bubble formation and reduce impurity defects.

2、 As a fluxing agent to optimize production processes

The calcium ions in limestone act as a "diluent" during high-temperature melting, changing the chemical properties of the glass melt and allowing it to melt at lower temperatures, reducing energy consumption.

By adjusting the proportion of limestone added, the viscosity and surface tension of the glass melt can be precisely controlled, making it easier to form (such as blowing, rolling, etc.) and improving processing efficiency.

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