Q: What is the main difference between heavy soda ash (Na₂CO₃) and light soda ash?

A: The key differences lie in bulk density, particle size, and application. Heavy soda ash has a higher bulk density (1.0-1.2 g/cm³) and larger particles, leading to better flowability. It is mainly used in glass manufacturing, metallurgy, and detergent production where stable feeding and uniform mixing are required. Light soda ash, with lower bulk density (0.5-0.7 g/cm³) and finer particles, is more suitable for chemical synthesis and food processing.

Q: How should heavy soda ash (sodium carbonate) be stored to prevent quality degradation?

A: Heavy soda ash should be stored in a dry, well-ventilated warehouse away from direct sunlight and moisture. It is hygroscopic, so it must be sealed in airtight containers to avoid absorbing water and caking. Additionally, it should not be stored with acidic substances (such as sulfuric acid or hydrochloric acid), as sodium carbonate reacts with acids to produce carbon dioxide gas, which may cause packaging damage or quality changes.

Q: Can heavy soda ash (Na₂CO₃) be replaced with other alkaline substances in glass production?

A: In most cases, heavy soda ash is not easily replaced. It acts as a flux in glass manufacturing to reduce the melting temperature of silica (the main raw material of glass) and adjust the viscosity of the glass melt. While other alkalis like potassium carbonate (K₂CO₃) can also act as fluxes, they are more expensive and may alter the glass’s physical properties (e.g., increasing brittleness). Heavy soda ash’s high purity (≥99.2%) and stable particle size also ensure consistent glass quality, making it the preferred choice for large-scale glass production.