At Apex International, we focus exclusively on the global export and supply of premium-quality Limestone Powder, ensuring consistent chemical composition, excellent brightness, and reliable industrial performance. Our limestone is sourced from carefully selected high-calcium reserves and processed through advanced grinding and classification systems under strict quality control procedures to maintain purity, uniform particle size, and precise technical specifications.
Limestone (Calcium Carbonate – CaCO₃) is a naturally occurring sedimentary rock primarily composed of calcium carbonate. Due to its high whiteness, chemical stability, and excellent dispersion characteristics, limestone powder is widely used in multiple industrial sectors. Through controlled crushing, micronizing, grading, and screening processes, we maintain precise mesh sizes, minimal silica and iron content, and a stable mineral composition suitable for international industry requirements.
Product Highlights:
LIMESTONE POWDER VARIETIES:
1. Raw Limestone Powder:
Raw Limestone Powder is produced by finely grinding natural limestone rock without thermal processing. It retains the natural calcium carbonate structure and is widely used in applications where high purity and brightness are essential.
Technical Advantages:
Raw Limestone Composition:
| Component | Typical Percentage |
|---|---|
| CaCO₃ (Calcium Carbonate) | 85 – 98 % |
| CaO (Calcium Oxide) (as calculated) | 48 – 55 % |
| MgCO₃ (Magnesium Carbonate) | 0.5 – 5 % |
| SiO₂ (Silicon Dioxide) | 0.5 – 3 % |
| Al₂O₃ (Aluminium Oxide) | 0.2 – 1 % |
| Fe₂O₃ (Iron Oxide) | 0.1 – 1 % |
| Loss on Ignition (CO₂) | 40 – 44 % | High-grade limestone typically contains more than 95% CaCO₃. |
Common Uses:
Paints and coatings, plastics, rubber products, PVC pipes, paper manufacturing, construction materials, adhesives, sealants, wall putty, ceramics, and animal feed supplements.
2. Calcined Limestone Powder:
Calcined Limestone Powder is produced by heating limestone under controlled conditions to convert calcium carbonate (CaCO₃) into calcium oxide (CaO). This process enhances reactivity and improves binding properties, making it suitable for specialized industrial applications.
Technical Advantages:
Calcined Limestone (Quicklime) Composition:
| When limestone is heated at approximately 900–1000°C, thermal decomposition occurs: CaCO₃ → CaO + CO₂ |
|
| Component | Typical Percentage |
|---|---|
| CaO (Calcium Oxide) | 90 – 96 % |
| MgO (Magnesium Oxide) | 1 – 4 % |
| SiO₂ (Silicon Dioxide) | 0.5 – 2 % |
| Al₂O₃ (Aluminium Oxide) | 0.2 – 1 % |
| Fe₂O₃ (Iron Oxide) | 0.2 – 1 % |
Common Uses:
Cement production, steel manufacturing, water treatment, soil stabilization, flue gas purification, construction chemicals, and various industrial chemical processes.
Industrial Applications:
Our limestone powder is widely utilized across numerous global industries, including:By improving insulation efficiency, enhancing durability, and adding natural aesthetic value, mica plays an important role in modern manufacturing and product performance.
Available Forms:
Quality & Export Commitment:
Each shipment undergoes comprehensive quality inspection, including chemical composition analysis (CaCO₃ / CaO content), whiteness testing, particle size verification, and moisture evaluation to ensure compliance with international standards. Our efficient supply chain management and export expertise allow us to provide timely delivery, competitive pricing, and reliable bulk supply solutions worldwide.
With consistent mineral composition, strong physical characteristics, and dependable industrial performance, our limestone powder supports manufacturers in achieving high-quality finished products while improving operational efficiency.
Packaging: Powder is available in 50 kg bags, and lumps are packed in 215 kg jumbo bags.
At Apex International, we are dedicated to building long-term international partnerships through quality assurance, technical reliability, and customer satisfaction.
For bulk orders, customized grades, or export partnerships, please feel free to contact us.