Overview
Highly Active Quicklime Granules are a processed form of calcium oxide (CaO) designed for rapid reactivity in industrial applications. They are produced by calcining limestone at high temperatures, driving off carbon dioxide to leave pure calcium oxide. These granules are favored in industrial settings due to their high surface area and uniform particle size, which ensures consistent performance in chemical reactions. Their reactivity makes them indispensable in processes requiring fast lime hydration or neutralization.
Physical and Chemical Properties
Quicklime granules are characterized by their white to grayish appearance and granular form, which enhances handling and reactivity. The material has a high melting point of 2,572°C and reacts exothermically with water, producing calcium hydroxide (slaked lime). Key chemical properties include strong alkalinity (pH ~12.4 in solution) and the ability to absorb moisture and carbon dioxide from the air, making proper storage critical. The density of 3.34 g/cm³ and granular structure ensure efficient transport and dosing in industrial processes.
Main Applications
In construction, quicklime granules are used in soil stabilization, mortar production, and as a flux in steelmaking. Their high reactivity makes them ideal for rapid pH adjustment in wastewater treatment and flue gas desulfurization. The metallurgical industry relies on quicklime for removing impurities in metal refining, while the chemical sector uses it in producing calcium-based compounds. Environmental applications include odor control and sludge treatment due to its disinfectant properties.
Safety and Storage
Quicklime granules are corrosive and require careful handling. Direct contact can cause severe burns to skin and eyes, necessitating the use of gloves, goggles, and protective clothing. Inhalation of dust should be avoided with proper ventilation or respirators. Storage must be in moisture-proof, sealed containers to prevent premature reaction with atmospheric humidity. Warehouses should be cool and dry, with spill containment measures due to the exothermic reaction with water.
B2B Procurement Guide
When procuring quicklime granules, prioritize suppliers who provide certificates of analysis confirming CaO content (typically 90-95%) and low residual carbonate levels. Packaging should be moisture-resistant, often multilayer bags or bulk silos for large quantities. Consider transportation logistics—bulk shipments may offer cost savings for high-volume users. Evaluate reactivity rates if the application demands fast slaking. Establish long-term contracts with reliable producers to ensure consistent quality and supply chain stability.
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