Overview
Quicklime powder, chemically known as calcium oxide (CaO), is produced by heating limestone (calcium carbonate) to high temperatures in a process called calcination. It is a versatile industrial chemical with applications ranging from construction to environmental remediation. Due to its high reactivity, especially with water, quicklime powder must be handled with care. It is commonly available in granular or powdered forms, with varying particle sizes tailored to specific industrial needs.
Physical and Chemical Properties
Quicklime powder is characterized by its white to grayish-white appearance and high melting point of over 2,500°C. Its density of 3.34 g/cm³ makes it heavier than water, and it reacts exothermically with water to form calcium hydroxide (slaked lime), releasing significant heat. The alkaline nature of quicklime powder makes it useful for neutralizing acidic substances. Its solubility in water is negligible, but it reacts vigorously, making it essential to control moisture exposure during storage and handling.
Main Applications
In construction, quicklime powder is a key ingredient in mortar and plaster, providing binding properties and durability. It is also used in soil stabilization to improve the load-bearing capacity of weak soils. Metallurgical industries rely on quicklime powder for steel production, where it acts as a flux to remove impurities. In water treatment, it adjusts pH levels and removes contaminants. Additionally, it serves as a raw material in chemical manufacturing, including the production of glass and paper.
Safety and Storage
Quicklime powder poses significant safety risks due to its corrosive nature. Direct contact can cause severe skin and eye burns, and inhalation of dust may irritate the respiratory tract. Proper personal protective equipment (PPE), such as gloves, goggles, and respirators, is mandatory. Storage requires airtight, moisture-proof containers to prevent unintended reactions. Facilities should be well-ventilated and equipped with spill containment measures. In case of exposure, immediate rinsing with water and medical attention are critical.
B2B Procurement Guide
When procuring quicklime powder, prioritize suppliers with certifications like ISO or GMP to ensure quality and consistency. Key specifications to verify include CaO content (typically ≥90%), particle size distribution, and impurity levels. Bulk purchases often offer cost advantages, but ensure logistics support for safe transportation. Contracts should include clauses for quality testing and delivery timelines. For reference, prices range between $50-$150 per metric ton, depending on purity and order volume.
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