Quicklime (Calcium Oxide – CaO)
Other names: Burnt Lime, Calcined Lime, Unslaked Lime
Manufacturer: Vietnam Technology Mineral JSC
Description:
Quicklime is produced by heating high-quality limestone (CaCO₃) in a kiln at elevated temperatures, causing it to undergo calcination:
Reaction: CaCO₃ → CaO + CO₂
When water is added, quicklime reacts vigorously in an exothermic process called slaking of lime, releasing intense heat. It has a strongly alkaline pH (~12.5), making it highly caustic — proper safety measures are essential when handling.
Key Specifications:
-
CaO content: ≥ 90% for premium-grade quicklime
-
Particle size: Fine particles (<1 mm) for higher surface area & faster reactivity
-
Moisture content: ≤ 1–2% to maintain reactivity
-
Impurities: MgO ≤ 2.5%; negligible heavy metals (Pb, As)
-
Consistency: Uniform particle size, density & reactivity across batches
-
Reactivity: Fast, exothermic slaking; ideal setting time ~24 hours
-
Storage stability: Maintains quality for 6–12 months with proper storage
-
Source traceability: Controlled limestone sourcing & kiln operation for consistent quality
Production Advantage:
Quicklime produced in modern rotary kilns offers superior and more consistent quality compared to older fixed-grate kilns.
Technical Data Sheet
No |
Property |
Unit |
Result |
Testing Method |
1 |
CaO |
% |
90 MIN |
TCVN9191:2012 |
2 |
MgO |
% |
1.92 |
TCVN9191:2012 |
3 |
Fe2O3 |
% |
0.09 |
TCVN9191:2012 |
4 |
Al2O3 |
% |
0.05 |
TCVN9191:2012 |
5 |
SiO2 |
% |
0.2 |
TCVN9191:2012 |
6 |
S |
% |
0.05 |
TCVN9191:2012 |
7 |
L.O.I |
% |
3.6 |
TCVN2231:1989 |
8 |
Slaking point |
minute |
2-5 |
TCVN2231:1989 |
9 |
Color |
|
Milky white |
- |
10 |
Moisture |
% |
0.2 |
- |
11 |
Size: 10-80MM |
% |
95 |
- |