Overview
Calcium lump is a solid form of pure calcium metal, widely utilized in industrial processes due to its strong reducing properties and reactivity. It is typically produced through electrolysis of molten calcium chloride or aluminothermic reduction. The metal is silvery-white and must be stored under protective conditions to prevent oxidation or reaction with moisture. In B2B markets, calcium lump is traded primarily for metallurgical and chemical applications. Its demand is driven by industries requiring precise control over alloy compositions or chemical reactions where calcium acts as a catalyst or reactant.
Physical and Chemical Properties
Calcium lump exhibits a density of 1.55 g/cm³ and melts at 842°C, making it a relatively lightweight metal with moderate thermal stability. It reacts vigorously with water to produce hydrogen gas and calcium hydroxide, a property that necessitates careful handling. The metal also dissolves in acids, forming corresponding salts. As a reducing agent, calcium lump is valued for its ability to extract oxygen or sulfur from compounds, such as in steel desulfurization. Its reactivity with halogens and chalcogens makes it useful in synthesizing specialized chemicals, though this requires controlled environments to prevent unintended reactions.
Main Applications
The primary use of calcium lump is in metallurgy, particularly for refining ferrous and non-ferrous alloys. It removes sulfur and oxygen impurities during steel production, enhancing ductility and strength. In aluminum alloys, calcium improves machinability and corrosion resistance. Chemical industries employ calcium lump for synthesizing calcium-based compounds like calcium hydride or as a reducing agent in organic reactions. Emerging applications include battery technologies and waste treatment, where its reactivity aids in neutralizing acidic pollutants or recovering metals from ores.
Safety and Storage
Due to its flammability and water reactivity, calcium lump requires storage under inert atmospheres or mineral oil. Direct contact with moisture must be avoided to prevent hydrogen generation, which poses explosion risks. Handling should involve dry tools and protective equipment, including gloves and goggles. Work areas need adequate ventilation to disperse any hydrogen released during accidental reactions. Disposal follows hazardous material protocols, often involving gradual neutralization with controlled amounts of alcohol or specialized reagents to mitigate reactivity.
B2B Procurement Guide
When sourcing calcium lump, prioritize suppliers with ISO certifications and transparent purity documentation. Industrial-grade calcium should assay ≥98% pure, with trace element profiles tailored to end-use (e.g., low lead for electronics). Packaging in airtight, oil-filled drums is standard to prevent degradation during transit. Pricing fluctuates based on market demand for downstream sectors like automotive or construction. Bulk orders (1+ tons) typically secure discounts, but verify logistics compatibility—some regions restrict transport of reactive metals. Sample testing for consistency in lump size and reactivity is advisable before large-scale procurement.
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