Production process of calcium hydroxide powder Ca(OH)2

What is Ca(OH)2 lime powder? How is lime powder produced? What are its applications in human life? Join Loc Thien Chemicals as we explore the chemical Ca(OH)2 in today's article.

Information about Ca(OH)2 lime powder:

Properties of lime powder:

• A white solid, appearing as crystals or powder.


• It is slightly soluble in water, forming a calcium hydroxide solution.


• Melts at 580^oC.


• Molar mass: 74.093 g/mol.


• Ca(OH)2 is odorless and flammable.

Lime powder production process:

Learn more about What is slaked lime?

To produce lime powder, raw materials must first be selected. This is not only a critical factor but also decisive for the final product's quality and efficiency. Common raw materials include natural limestone and other calcium carbonate sources. Choosing materials with high CaCO3 and CaO content helps save fuel and reduces impurities, ensuring a high-quality end product.

Step 2: Grinding the raw materials:

Since slaked lime remains in large chunks, the next step involves grinding it into smaller particles. This is crucial—after grinding, the limestone is classified to separate particles of the desired size before being stored.

Step 3: Lime calcination:

Calcination is the most critical stage in Ca(OH)2 lime powder production, determining the final product's quality. First, limestone (CaCO3) is heated to the required temperature and maintained for a specific duration. This triggers the key chemical reaction:

CaCO3 → CaO + CO2

CaO + H2O → Ca(OH)2 + Q

After CaO fully hydrates, wait 2–10 days (depending on the pit size) for the lime to cool and form a malleable paste. The white lime milk layer on the surface is impurity-free, as all residues settle at the bottom.

The pliable lime layer is then scooped, weighed, and packaged.

Step 4: Packaging and storage:

The product is packaged in various sizes per market demand, ensuring sealed packaging to prevent dust pollution. The Ca(OH)2 lime powder is then transported to storage facilities, which must be safe, ventilated, and dry.

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Applications of Ca(OH)2 in daily life:

• Used in construction for mortar and plaster. Ca(OH)2 provides adhesion and pH control, enhancing material durability.


• Applied in agriculture as a soil conditioner to adjust pH and supply calcium to crops.

• Used in wastewater treatment to alkalize water and reduce acidity, improving water quality and preventing pipe corrosion.
• Employed in food processing (e.g., peanut production) to control acidity and moisture.
• Ca(OH)2 lime powder serves as a raw material in chemical industries for producing calcium chloride and calcium acetate.

Where to buy reliable Ca(OH)2 slaked lime:

Our Ca(OH)2 lime powder is high-quality, competitively priced, and directly imported from markets like China, India, the U.S., and the EU.

Our products meet strict quality standards and come in various price segments to suit diverse industrial needs. For detailed pricing and chemical information, including Ca(OH)2, contact us at: 0979 891 929.