Overview
Lime rods, also known as quicklime rods, are cylindrical forms of calcium oxide (CaO). They are produced by heating limestone (calcium carbonate) at high temperatures, a process known as calcination. Lime rods are widely used in industries such as construction, agriculture, and metallurgy due to their high reactivity and alkaline properties. In construction, lime rods are used for soil stabilization and as a key ingredient in mortar and plaster. In agriculture, they help neutralize acidic soils and improve crop yields. Their ability to react with water makes them useful in water treatment processes for pH adjustment and impurity removal.
Physical and Chemical Properties
Lime rods are white to grayish in appearance and have a high melting point of 2,572°C, making them suitable for high-temperature applications. They are highly reactive with water, producing calcium hydroxide and releasing significant heat in an exothermic reaction. This property is harnessed in various industrial processes. The density of lime rods is approximately 3.34 g/cm³, and they are insoluble in organic solvents but react vigorously with water. Their alkaline nature makes them effective in neutralizing acids, which is why they are commonly used in environmental and chemical applications.
Main Applications
Lime rods are indispensable in the construction industry, where they are used to produce lime mortar and stabilize soils. Their ability to absorb moisture and react with clay minerals makes them ideal for improving soil quality in road construction and building foundations. In agriculture, lime rods are applied to acidic soils to raise pH levels, enhancing nutrient availability for plants. They are also used in water treatment to remove impurities and adjust pH. Additionally, lime rods play a critical role in steel production, where they act as a flux to remove impurities during the smelting process.
Safety and Storage
Lime rods are corrosive and can cause severe irritation to the skin, eyes, and respiratory system. Proper handling with gloves, goggles, and masks is essential to prevent exposure. In case of contact, affected areas should be rinsed immediately with plenty of water. Storage conditions are crucial to maintaining the quality of lime rods. They should be kept in a dry, cool place away from moisture to prevent premature hydration. Packaging should be airtight to avoid reaction with atmospheric moisture, which can reduce effectiveness and create hazardous dust.
B2B Procurement Guide
When procuring lime rods, B2B buyers should prioritize suppliers with certifications such as ISO 9001 to ensure product quality and consistency. Key factors to consider include purity levels (typically 90-95% CaO), packaging integrity, and logistical support for bulk transportation. Price negotiations should account for volume discounts, with reference prices ranging from $100 to $300 per metric ton. Buyers should also verify the supplier's ability to provide technical support and safety data sheets (SDS) for compliance with local regulations.
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