Introduction
Titanium dioxide (TiO₂) manufacturing demands precise solid-liquid separation to ensure product purity, process efficiency, and cost control. While candle filters and float ball filters (e.g., CN filters) are commonly used, Dongou’s sintered polymer microporous technology offers transformative advantages. Here’s how our systems outperform alternatives in TiO₂ hydrates filtration, washing, and acid recovery stages.
Technology Comparison: Dongou vs. Alternatives
| Feature | Dongou Microfiltration | Candle Filters | Float Ball Filters |
| Filtration Principle | Surface-layer precision sieving | Cloth depth filtration | Suspended media + electrostatic adsorption |
| Filtration Precision | 0.2 µm (absolute) | 5–10 µm (variable) | Low, unstable |
| Solid Recovery Rate | >99% | ~90–95% | 80–90% (uncontrolled loss) |
| Automation Level | Fully automated (CIP, backflush) | Manual cloth replacement | Frequent media addition |
| Operating Cost | Low (water, energy, media) | High (cloth, labor, downtime) | Very high (continuous media loss) |
| Lifetime & Maintenance | 3+ years (regenerable) | Frequent cloth changes | Daily media replenishment |
| Environmental Safety | Closed system, zero emission | Closed but open during cleaning | Open system, VOC/HCl release |
How Dongou Microfiltration Excels in TiO₂ Production
1. Maximized Product Yield & Purity
- >99% TiO₂ recovery via 0.2 µm absolute filtration, minimizing product loss in filter cake or wastewater.
- No contamination from filter media (e.g., float balls or cloth fibers), ensuring brilliant whiteness and consistent particle size.
2. Lower Total Cost of Ownership
- Regenerable filters withstand 500+ backflush/chemical cleaning cycles without media replacement.
- Reduced water consumption by 60% vs. CN filters (minimal backwash demand).
- No continuous media purchase (unlike float balls or filter cloths).
3. Fully Automated, Safer Operation
- Zero manual intervention: programmable backflush, cake discharge, and CIP.
- Hermetically sealed design prevents HCl vapor/VOC exposure, enhancing operator safety and environmental compliance.
4. Proven TiO₂ Application Scenarios
- Hydrate Washing: Efficient chloride/impurity removal with minimal water usage.
- Acid Recovery: Precise separation of TiO₂ solids from sulfuric/hydrochloric acid streams.
- Calcination Feed Preparation: Uniform, low-moisture cake for optimized kiln operation.
Case Example: TiO₂ Plant Upgrade
A Chinese leading TiO₂ producer replaced CN filters with Dongou’s PGX system in hydrate washing:
Result:
- Yield increased >5% (from 93% to 99.5%).
- Maintenance labor reduced by 70%.
- Wastewater volume decreased 45%.
Conclusion: A Smarter Investment for TiO₂ Manufacturers
While candle and float ball filters appear lower in upfront cost, Dongou’s microporous systems deliver higher productivity, lower operating expenses, and full automation—critical advantages in competitive TiO₂ markets. By maximizing yield and eliminating media waste, our technology pays back in under 24 months.
Ready to optimize your TiO₂ filtration?
Contact DongouMF for a free material test—we’ll validate performance using your actual process slurry.