Overview
Lime Black, or calcium hydroxide black, is a specialized variant of hydrated lime with distinct industrial applications. It is produced by slaking quicklime (calcium oxide) with water, resulting in a fine black powder or granules. This product is valued for its alkalinity and reactivity, making it useful in a variety of industrial processes. Unlike standard hydrated lime, Lime Black is processed under specific conditions to achieve its unique color and properties. It is commonly used in industries where a darker pigment or enhanced chemical properties are required, such as in construction materials or water treatment processes.
Physical and Chemical Properties
Lime Black exhibits several key physical and chemical properties that make it suitable for industrial use. It has a molecular weight of 74.09 g/mol and a density of approximately 2.24 g/cm³. The compound is slightly soluble in water, forming a mildly alkaline solution. Chemically, Lime Black reacts with acids to form calcium salts and water. It also absorbs carbon dioxide from the air, gradually converting back to calcium carbonate. This property is particularly useful in applications like flue gas desulfurization, where it helps neutralize acidic gases.
Main Applications
Lime Black is widely used in the construction industry as an additive in mortar and plaster, where its dark color can be advantageous for aesthetic or functional purposes. It also serves as a soil conditioner in agriculture, helping to neutralize acidic soils and improve crop yields. In water treatment, Lime Black is employed to adjust pH levels and remove impurities. Additionally, it finds use in chemical manufacturing, particularly in the production of calcium-based compounds. Its reactivity and alkalinity make it a versatile ingredient in various industrial processes.
Safety and Storage
Handling Lime Black requires caution due to its alkaline nature, which can cause skin and eye irritation. Workers should wear protective gear, including gloves and goggles, to minimize exposure. Inhalation of dust should be avoided, as it can irritate the respiratory tract. For storage, Lime Black should be kept in a cool, dry place, away from moisture and acidic substances. Properly sealed containers are essential to prevent the material from absorbing CO2 from the air, which can reduce its effectiveness over time.
B2B Procurement Guide
When procuring Lime Black, B2B buyers should prioritize quality and consistency. Key factors to consider include purity (typically 90-95%), moisture content (ideally below 2%), and packaging integrity. Bulk purchases often offer cost savings, but ensure the supplier can provide adequate storage solutions. It’s advisable to request product samples and certificates of analysis (COA) to verify specifications. Establish long-term relationships with reputable suppliers to ensure a steady supply chain and negotiate favorable terms based on volume and delivery frequency.
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