Sorbent – Hydrated Lime (Ca(OH)₂) – Sorbent Grade
Hydrated Lime (Calcium Hydroxide) used as a Sorbent Grade is a specifically produced white, fine powder with a high chemical surface area and purity. Its primary use is in Flue Gas Desulfurization (FGD) systems, where it acts as a low-cost, effective alkaline reagent to capture and neutralize acidic gaseous pollutants, primarily sulfur dioxide (SO2) and hydrogen chloride (HCl), from the exhaust streams of power plants and industrial furnaces.
Main Composition and Sorbent Function
The high reactivity of the OH2 is crucial for efficient pollutant capture.
| COMPONENT | CHEMICAL FORMULA | PROPERTY HIGHLIGHT |
| Calcium Hydroxide | Ca(OH)2 | Highly basic, reacts rapidly with SO2 and HCl. |
| Sorbent Grade | Fine Powder | High surface area and controlled particle size for maximum reaction efficiency. |
| CLASSIFICATION | APPLICATION FOCUS | PRIMARY REACTION |
| Alkaline Sorbent | Air Pollution Control (FGD) | Neutralization of acidic gases. |
Key Desulfurization Reaction (Wet Scrubbing Example)
The lime reacts with sulfur dioxide to form calcium sulfite/sulfate, a stable solid that is removed as sludge:
Key Performance Metrics
| PROPERTY | TYPICAL PERFORMANCE | MECHANISM OF ADVANTAGE |
| Reactivity | HIGH | The porous structure and fine particle size allow for fast diffusion and chemical reaction with pollutants. |
| Capacity | GOOD | Provides high molar capacity (CaO equivalence) per unit mass for neutralizing acid gases. |
| Cost | LOW | Highly abundant and economical source of industrial calcium alkalinity. |
Applications in Flue Gas Desulfurization (FGD)
Sorbent Grade Hydrated Lime is the reagent of choice in several types of FGD systems:
- Dry Scrubbing (Dry Sorbent Injection, DSI): Fine, dry Ca(OH)2 powder is injected directly into the high-temperature flue gas duct. The dry sorbent reacts quickly with the acid gases ((SO)2, HCl) to form solid products that are captured by a downstream baghouse or electrostatic precipitator. This is simple and cost-effective for smaller units or lower sulfur coal.
- Semi-Dry Scrubbing (Spray Dryers): A slurry (mixture with water) of Ca(OH)2 is atomized into a spray dryer. The water evaporates instantly, and the dry, reactive Ca(OH)2 particle reacts with the acid gases. This method offers higher removal efficiency than DSI.
- Wet Scrubbing: The lime is mixed into a slurry, which is sprayed into a large absorber vessel.8 This method achieves the highest removal efficiencies (up to 99%) and is common in large power plants, often using the lime to produce gypsum (CaSO4·2H2O) as a marketable byproduct.
Advantages and Grade Specifics
- High Purity: Sorbent Grade is produced to ensure minimal impurities that might interfere with the reaction or create unwanted byproducts.
- Controlled Particle Size: The particles are ground to an extremely fine size (high surface area) to maximize the contact points and reaction speed, which is vital in short-residence-time flue gas ducts.
- Safer to Handle: Although still alkaline, Ca(OH)2 is safer to handle and store than Quicklime (CaO), as it has already been slaked and does not pose the same acute hydration/heat risk.
Typical Industries
- Coal-Fired Power Plants: Primary consumer for (SO)2 and HCl removal.
- Waste-to-Energy (Incineration): Used to neutralize HCl and other acid gases.
- Cement, Glass, and Industrial Boilers: Used for various air pollution control applications.
✨ Customization Services
We offer product customization services, allowing you to tailor the appearance, dimensions, or specific markings of items like refractory shapes or bricks. This includes options for incorporating specific geometric requirements to ensure seamless integration into your process systems.
🔬 Sampling for Testing & Validation
Free product samples are available for thorough testing and validation. This allows you to confirm the quality, compatibility, and performance of our materials—such as specific bricks, castables, or raw materials—before committing to a full order.
💡 Expertise in Refractory Solutions
Leverage our deep expertise to receive detailed, application-specific refractory solutions. We move beyond just selling products by providing comprehensive plans that encompass material selection, installation guidance, and performance optimization to maximize the lifespan and efficiency of your high-temperature processes.
Rabatec products are exclusively manufactured in facilities that have achieved rigorous ISO certifications across Quality (ISO 9001), Environmental Management, and Occupational Health & Safety. This commitment ensures every product, from refractory bricks to specialized equipment, meets the highest global benchmarks for performance, sustainability, and workplace safety.
📦 Logistics Excellence: Shipping, Packaging, and Marking
Minimizing Risk: We manage all logistics to minimize handling touchpoints and transit shock. Our carriers are pre-vetted for their experience in transporting heavy, fragile, and sensitive industrial materials.
Traceability: Every shipment includes comprehensive documentation and tracking information, providing end-to-end visibility and ensuring precise delivery coordination for your site.
Protection is Paramount: Our packaging strictly follows industry standards to prevent damage, corner chipping, and moisture absorption—especially critical for materials like Basic Refractory Bricks and Refractory Mortars & Mixes.
Robust Palletization: Products are secured on fumigated, high-strength export pallets (e.g., 1100x950mm or similar sturdy dimensions) using heavy-duty strapping and durable protective wrapping (polyethylene sheeting, cardboard, etc.) to withstand long-distance travel and multiple loadings.
Moisture Control: Sensitive materials are protected with appropriate sealing and, where necessary, desiccants or moisture-vapor proof enclosures to maintain the product's integrity until installation.
Clear Identification: All outer packaging is clearly marked on multiple sides with large, legible text for immediate identification and safe handling.
Full Traceability: Markings include all essential data points: Product Name, Quality Grade, Batch Number, Quantity, Net/Gross Weight, Order Number, and the Final Destination/Construction Area. This ensures every pallet can be accounted for and correctly staged upon arrival.
Safety & Compliance: We adhere to all regulatory requirements for marking, labeling, and placarding—especially for any items classified as Dangerous Goods—to ensure full compliance with international and domestic transport regulations.
❓ Frequently Asked Questions (FAQ)
Question | Elaborated Answer |
Q: What is the Refractoriness Under Load (RUL) of your refractories? | A: Refractoriness Under Load (RUL) is a critical property that defines the maximum temperature our materials can withstand while under compressive stress before deforming (softening). Since we offer a wide range of materials—from Alumina-Silicate Bricks to high-performance Silicon Carbide Bricks—the RUL varies significantly. For specific product data, please refer to the product data sheet or submit a quote request for the material you are interested in. |
Q: Where are the Rabatec refractories and materials produced? | A: Our products are primarily sourced from specialized manufacturing plants in China. Crucially, these facilities have all undergone rigorous audits and achieved comprehensive ISO certifications (Quality, Environment, and Safety), ensuring that production adheres to the highest global standards for consistency and performance. |
Q: What refractory materials does the company offer? | A: We supply a comprehensive portfolio of advanced refractory solutions, including: Shaped Products: Alumina & Silica Bricks, Basic & Specialized Bricks (e.g., Magnesia), SiC & Structural Ceramics, and Precast Shapes. Monolithic Products: Refractory Castables, Mixes & Mortars. Insulation: Insulation Fibre and High-Performance Insulation Products. |
Q: How should I choose the appropriate refractory material for my application? | A: Selecting the correct refractory is paramount to process efficiency. The choice depends on three key factors: 1. Operating Environment: Maximum process temperature and thermal cycling (shock). 2. Chemical Attack: Type of slag, molten metal, or corrosive gas being handled (acidic, neutral, or basic). 3. Mechanical Stress: Abrasion, erosion, and static load requirements. We recommend utilizing our detailed refractory solutions service to consult with our engineers for an optimized, application-specific recommendation. |
Q: Which monolithic material should I choose when patching an existing lining? | A: For patching and minor repairs, the ideal monolithic material depends on the parent lining material, the patching depth, and the need for a rapid return to service. Common choices include: Refractory Mortars & Mixes (for minor joints/surfaces) or Plastic Refractories (for areas requiring physical compaction). Always choose a patch material chemically compatible with the existing lining to ensure proper bonding and service life. |
Q: Can I receive product samples before placing a major order? | A: Yes. We gladly provide product samples for your internal testing and validation purposes. This ensures you can confirm the quality, composition, and fit of the material—such as our Refractory Castables or Alumina-Silicate Bricks—in your specific operational environment before committing to a bulk purchase. |
Q: Do you provide certifications to verify material quality? | A: Absolutely. We provide product-related inspection certificates and quality assurance documentation upon request. This verifies that your order has passed all internal quality control checks and meets the required material specifications and industry standards. |
Q: What measures are taken for product protection during transport? | A: We ensure quick, reliable transport by using robust, industrial packaging that strictly follows industry standards. This includes high-strength palletization, heavy-duty strapping, and weather-resistant wrapping to protect fragile items like bricks and mixes from corner chipping, mechanical damage, and moisture during transit. |
