Overview
Dehydrated solidified quicklime blocks are manufactured by high-temperature calcination of limestone (calcium carbonate), followed by processing into compacted forms for easier handling and transport. Unlike powdered quicklime, these blocks offer controlled reactivity and reduced dust generation. The material is widely used in B2B sectors due to its cost-effectiveness and versatile chemical properties. Its primary component, calcium oxide (CaO), undergoes slaking when mixed with water, producing calcium hydroxide—a key ingredient in construction and environmental applications.
Physical and Chemical Properties
Quicklime blocks exhibit a high melting point (2,572°C) and density (~3.34 g/cm³), making them thermally stable for industrial processes. Their hygroscopic nature requires strict moisture control during storage to prevent premature slaking or caking. Chemically, CaO reacts vigorously with water in an exothermic reaction, releasing heat and forming calcium hydroxide. This property is leveraged in soil stabilization, where quicklime reduces moisture content and improves load-bearing capacity. The material also neutralizes acidic compounds, making it valuable in waste treatment and flue gas desulfurization.
Main Applications
In construction, quicklime blocks are crushed and slaked to produce lime mortar for masonry and plastering. Their binding properties enhance durability and workability compared to Portland cement in historic restoration projects. Agricultural uses include soil pH adjustment and pathogen control in livestock facilities. Industrial applications span steel manufacturing (as a flux), paper production, and chemical synthesis (e.g., calcium carbide). Environmental engineers employ quicklime for sewage sludge treatment and heavy metal immobilization in contaminated sites.
Safety and Storage
Quicklime blocks pose significant hazards due to their corrosive and reactive nature. Workers must wear acid-resistant gloves, goggles, and respiratory protection to prevent burns from dust or splashes during handling. Storage mandates airtight, moisture-proof containers in ventilated areas. Avoid stacking near acids or organic materials, as heat generation from accidental slaking may cause fires. Spills should be neutralized with dry sand or vermiculite—never water—before disposal as hazardous waste.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO-certified manufacturing facilities to ensure consistent CaO content (typically 90-95%). Bulk purchases (20+ tons) often qualify for discounts, but verify logistics compatibility—standard palletized blocks weigh ~25 kg each. Key procurement metrics include reactivity rate (measured by slaking speed), impurity levels (magnesium oxide and silica affect performance), and packaging durability for long-distance transport. Request Material Safety Data Sheets (MSDS) and batch-specific assay certificates before finalizing orders.
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