Overview
Quicklime granules, chemically known as calcium oxide (CaO), are produced by heating limestone (calcium carbonate) to high temperatures in a process called calcination. This results in a highly reactive alkaline compound widely used in industrial and environmental applications. The granular form of quicklime offers advantages in handling and controlled reactivity compared to powdered forms. It is commonly utilized in industries requiring precise dosing or slower reaction rates, such as water treatment and metallurgy.
Physical and Chemical Properties
Quicklime granules exhibit a white to grayish-white appearance with a high melting point exceeding 2,500°C. Their density of 3.34 g/cm³ makes them heavier than water. The material is hygroscopic, readily absorbing moisture from the air, which necessitates careful storage. When combined with water, quicklime undergoes an exothermic reaction forming calcium hydroxide (slaked lime), releasing significant heat. This property makes it valuable for applications requiring heat generation or pH adjustment, but also demands careful handling to prevent thermal burns or violent reactions.
Main Applications
In steel manufacturing, quicklime granules serve as a flux to remove impurities during the production process. The construction industry uses them in soil stabilization and as a component in certain types of cement and mortar. Environmental applications include water treatment for pH adjustment and sludge conditioning. Quicklime is also employed in chemical synthesis, particularly in the production of calcium-based compounds and as a drying agent in various industrial processes.
Safety and Storage
Quicklime granules require careful handling due to their corrosive nature. Personal protective equipment including gloves, goggles, and respiratory protection should be used when handling the material to prevent chemical burns or inhalation hazards. Storage must be in moisture-proof containers in dry, well-ventilated areas away from incompatible materials such as acids and organic compounds. The material should be kept sealed when not in use to prevent absorption of atmospheric moisture which can reduce product quality and create handling hazards.
B2B Procurement Guide
When procuring quicklime granules, buyers should specify the required purity level, typically ranging from 90-98% CaO content, depending on application needs. Packaging options include moisture-resistant bags or bulk containers for large quantity purchases. Quality certifications such as ISO standards and material safety data sheets should be requested from suppliers. Transportation considerations include ensuring vehicles are dry and properly covered to prevent moisture exposure during transit. Bulk purchases may offer cost advantages but require appropriate storage facilities at the buyer's location.
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