Hydrated Lime Powder
High-Purity Hydrated Lime Powder - Ca(OH)₂ for Flue Gas & Water Treatment
Hydrated Lime Powder (Ca(OH)₂, Calcium Hydroxide) processed from high-calcium quicklime reserves. Engineered for precise acid neutralization, heavy metal precipitation, and dry flue gas desulfurization (FGD), with active available lime content up to 95% and controlled particle size distribution down to 325 mesh (45 μm).
our services
Flue Gas Treatment (FGD) & Acid Gas Scrubbing
High-surface-area calcium hydroxide injected into dry and semi-dry duct sorbent injection (DSI) systems. Reacts with acidic components (SO₂, SO₃, HCl, HF) in coal-fired power plants, waste incineration facilities, and glass manufacturing furnaces.
Water & Wastewater Processing
Acts as an alkaline reagent for pH adjustment, coagulation assistance, and heavy metal (Cu²⁺, Ni²⁺, Pb²⁺, Zn²⁺) precipitation.
Precipitates dissolved phosphates and fluorides into insoluble calcium salts.
Softens hard water by precipitating soluble bicarbonate species.
Mining & Hydrometallurgy
Maintains alkaline pH levels in gold, silver, and copper cyanidation circuits, preventing toxic HCN gas volatilization and optimizing froth flotation kinetics.
Product Grades & Specifications
|
Grade Designation |
Active Ca(OH)₂ Content |
Primary Particle Size |
Core Industrial Focus |
|
High-Reactivity FGD Grade |
≥ 92% - 95% |
98% < 45 μm (325 mesh) |
Dry/Semi-dry Flue Gas Desulfurization (SO₂, HCl capture) |
|
Water Treatment Grade |
≥ 90% - 92% |
95% < 75 μm (200 mesh) |
Municipal drinking water, industrial wastewater neutralization |
|
Industrial / Metallurgical Grade |
≥ 88% - 90% |
90% < 75 μm (200 mesh) |
Mining leaching, steelmaking flux, chemical synthesis |
|
Construction Grade |
≥ 85% |
85% < 90 μm (170 mesh) |
AAC blocks, dry-mix mortars, soil stabilization |
Technical Data
|
Chemical & Physical Parameter |
High-Reactivity FGD Grade |
Water & Wastewater Grade |
Standard Industrial Grade |
Test Method Reference |
|
Available Ca(OH)₂ Purity |
≥ 93.5% |
≥ 90.0% |
≥ 88.0% |
ASTM C25 / EN 459-2 |
|
Active CaO Equivalent |
≥ 70.8% |
≥ 68.2% |
≥ 66.7% |
ASTM C25 |
|
Free Moisture (H₂O) |
≤ 1.0% |
≤ 1.5% |
≤ 2.0% |
Oven Drying at 105°C |
|
Acid Insolubles (SiO₂) |
≤ 0.5% |
≤ 1.2% |
≤ 2.0% |
Gravimetric Analysis |
|
Magnesium Oxide (MgO) |
≤ 0.8% |
≤ 1.5% |
≤ 2.0% |
ICP-OES / XRF |
|
Iron Oxide (Fe₂O₃) |
≤ 0.05% |
≤ 0.15% |
≤ 0.30% |
Titration / XRF |
|
325 Mesh Residue (45 μm) |
≤ 2.0% |
≤ 5.0% |
≤ 8.0% |
Wet Sieve Analysis |
|
Bulk Density (Poured) |
0.45 - 0.55 g/cm³ |
0.48 - 0.58 g/cm³ |
0.50 - 0.60 g/cm³ |
ISO 787-11 |
|
BET Specific Surface Area |
18 - 22 m²/g |
14 - 18 m²/g |
10 - 14 m²/g |
N₂ Adsorption (BET) |
Raw quicklime (CaO) undergoes controlled hydration in multi-stage hydrators equipped with real-time temperature and moisture feedback systems. Sieve calibration and chemical purity are verified continuously during production.
[Raw Limestone Mining] ➔ [Vertical Kiln Calcination] ➔ [Multi-Stage Hydration] ➔ [Air Classifier Milling] ➔ [XRF & Sieve QC Analysis] ➔ [Moisture-Proof Packaging]
Lab Verification Protocol (Every 50-Ton Lot)
X-Ray Fluorescence (XRF): Rapid determination of elemental composition (Ca, Mg, Si, Fe, Al).
Wet Sieve Titration: Continuous monitoring of 45 μm and 75 μm oversized particles.
Available Lime Titration: Acid-base titration according to ASTM C25 to ensure batch-to-batch chemical potency.
Trace Metal ICP-MS Analysis: Guarantees heavy metal thresholds satisfy EN 12518 standards for drinking water treatment.
Custom Particle Size & Packaging Options
Particle Size Customization
Air-classifier milling systems allow exact tailoring of particle size metrics (d50 and d90):
Micronized grades (d50 ≤ 5 μm) for high-speed chemical synthesis.
Granular / Standard fine powders (45 μm - 90 μm) for pneumatically conveyed bulk silos.
Packaging Configurations
To eliminate moisture absorption (CO₂ carbonation and atmospheric slaking) during ocean transit:
1,000 kg Bulk Bags (FIBC): Heavy-duty woven polypropylene outer bag with inner polyethylene (PE) sealed liner (100–120 micron thickness). Optional bottom discharge spout.
25 kg Multi-Wall Paper Bags: 3-ply kraft paper with internal PE film layer, palletized and stretch-wrapped with edge protectors.
Pneumatic Bulk Tank Containers: Direct transfer for high-volume regional distribution.
Container Loading Efficiency:
20ft FCL (Palletized): 20–22 Metric Tons.
20ft FCL (Unpalletized / Slipsheet): Up to 24 Metric Tons (subject to route weight limits).
Documentation Provided: Certificate of Analysis (COA) per batch, Safety Data Sheet (SDS / MSDS in compliance with EU REACH / US OSHA GHS), Bill of Lading, Certificate of Origin.
Monthly Production Capacity:
35,000 Metric Tons.
Minimum Order Quantity (MOQ):
20 Metric Tons (1 x 20ft FCL).
Port of Loading:
Major coastal deep-water ports with dedicated mineral loading terminals.
Our Certificate
fAQ
Q: What is the difference between Available Lime and Total Calcium Hydroxide content?
A: Available Lime measures the reactive Ca(OH)₂ immediately available for acid neutralization or chemical reaction (determined via ASTM C25 sugar method). Total Ca(OH)₂ includes unreactive calcium bound to carbonates (CaCO₃) or silicates. For process calculations, Available Lime is the primary metric for cost efficiency.
Q: How do you prevent hydrated lime from degrading or carbonating during long ocean transit?
A: We enforce dual-layer moisture protection. FIBC super sacks incorporate an inner PE liner (100+ microns) that is heat-sealed after filling. Bags are packed inside moisture-insulated containers with heavy-duty desiccant packs, maintaining free moisture below 1.0% throughout transoceanic shipping.
Q: Can you adjust the BET surface area for dry sorbent injection (DSI) systems?
A: Yes. By controlling the temperature and steam-to-quicklime ratio during the hydration stage, we produce high-reactivity hydrated lime with BET surface areas between 18 m²/g and 22 m²/g, optimizing acid gas capture efficiency in flue gas systems.
Q: Does your hydrated lime comply with drinking water treatment standards?
A: Our Water Treatment Grade meets EN 12518 (Chemicals used for treatment of water intended for human consumption) and AWWA B202 standards, restricting insoluble matter and heavy metal content (Pb, As, Cd, Cr) to specified limits.
Q: What is the shelf life of your packaged Hydrated Lime Powder?
A: When stored in unopened original packaging with intact PE liners in a dry, covered warehouse, the chemical purity and reactivity remain stable for up to 12 months from the production date.
Q: Do you supply sample lots for lab-scale reaction testing or pilot plant trials?
A: Yes. We provide 2 kg to 5 kg sealed sample pails with batch-specific Certificates of Analysis (COA) for laboratory screen testing, particle size analysis, and titration verification prior to full commercial order placement.