Barium carbonate (BaCO₃), a white crystalline inorganic compound, is widely used in ceramics, glass manufacturing, electronics, and chemical synthesis. Common Drying Methods: Flash Dryer, Vacuum rake dryer
Barium carbonate (BaCO₃), a white crystalline inorganic compound, is widely used in ceramics, glass manufacturing, electronics, and chemical synthesis. Drying barium carbonate is essential to remove moisture or residual solvents, ensuring its purity, reactivity, and suitability for high-temperature processes. This step is particularly critical for applications requiring precise stoichiometry and minimal impurities.
Key Properties Influencing Drying
Thermal Stability:
Decomposes at ~1,400°C to barium oxide (BaO) and carbon dioxide (CO₂).
Stable under typical drying temperatures (<200°C).
Hygroscopicity: Low to moderate moisture absorption, depending on particle size and storage conditions.
Solubility:
Insoluble in water.
Reacts with acids to release CO₂.
Particle Size: Ranges from coarse powders to fine granules, affecting drying kinetics.
Common Drying Methods
Flash Dryer :
High-Efficiency Drying Mechanism: XSG Series Spin Flash Dryer employs a tangential air inlet and a high-speed stirrer to create a powerful rotating wind field. This ensures efficient heat transfer and uniform drying of paste, cake, and slurry materials.
Advanced Material Processing: The equipment processes raw materials through a combination of cutting, shearing, blowing, floating, and rotating actions, transforming them into granulated form. This enhances material separation and strengthens the heating exchange process.
Vacuum rake dryer:
The vacuum rake dryer is a novel horizontal intermittent vacuum drying equipment. The wet material evaporates through conduction. The scraper stirrer continuously removes the material on the hot surface and pushes it in the container to form a circulating flow. After the water evaporates, it is pumped out by the vacuum pump. This machine adopts large-area inter-layer heating method, with large heat transfer surface and high thermal efficiency.
Critical Parameters
Temperature: Maintain below 200°C to avoid partial decomposition or sintering.
Moisture Content: Target residual moisture <0.5% for electronic-grade applications.
Particle Size Control: Critical for ensuring reactivity in ceramic glazes or ferrite production.
Applications of Dried Barium Carbonate
Ceramics and Glass:
Flux agent to reduce melting temperatures and enhance glass clarity.
Key component in dielectric ceramics and barium titanate production.
Electronics:
Raw material for barium ferrite magnets and thermistors.
Chemical Synthesis:
Precursor for barium salts (e.g., Ba(NO₃)₂) and catalysts.
Environmental Remediation:
Used to remove sulfates from wastewater.
Safety and Handling
Hazards:
Toxic: Harmful if ingested or inhaled; may cause irritation to skin and eyes.
Reacts with acids to release toxic CO₂ gas.
Precautions:
Use PPE (respirators, gloves, goggles) and operate in well-ventilated areas.
Implement dust control systems to minimize airborne particles.
Storage: Keep in sealed, moisture-resistant containers away from acids.
Post-Drying Storage
Packaging: Airtight bags or drums with desiccants for moisture-sensitive grades.
Shelf Life: Indefinite if stored in dry, cool conditions.
Environmental and Regulatory Notes
Barium compounds are regulated due to their toxicity. Proper disposal and wastewater treatment are mandatory to prevent environmental contamination.
Compliance with OSHA, REACH, and other safety standards is required for handling and transport.