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Ground
Calcium Carbonate

Calcium carbonate powder is a fine, white, odorless substance that is made up of calcium, carbon, and oxygen (CaCO₃). It is naturally found in rocks such as limestone, marble, and chalk. Calcium carbonate is one of the most widely used substances in the world, finding applications across various industries, including construction, agriculture, and manufacturing, as well as in products like paper, plastics, paints, and dietary supplements. It is also commonly used as a filler material and a neutralizing agent due to its chemical properties.

Sources

Calcium carbonate is a widely available mineral that is obtained from various natural and synthetic sources. These include:

Mineral Sources

  • Limestone:The most common source of calcium carbonate, formed from sedimentary deposits.
  • Marble:A metamorphic rock with high purity calcium carbonate.
  • Chalk: A soft, sedimentary rock made from microscopic marine organisms’ remains.

Biological Sources

  • Eggshells:Naturally rich in calcium carbonate.
  • Shells and Corals:Calcium carbonate is the primary structural component of seashells and coral reefs.
  • Bones and Exoskeletons: Found in the skeletal structures of marine animals.

Industrial (Synthetic) Sources

  • Calcium carbonate can be synthesized by reacting quicklime (CaO) with water to form slaked lime (Ca(OH)₂), followed by the addition of carbon dioxide (CO₂) to produce calcium carbonate.

Applications

Calcium carbonate can be synthesized by reacting quicklime (CaO) with water to form slaked lime (Ca(OH)₂), followed by the addition of carbon dioxide (CO₂) to produce calcium carbonate.

How it’s obtained:

Extracted through open-pit or underground mining from limestone, marble, or chalk deposits. After extraction, the raw material is crushed, ground, and processed into fine calcium carbonate powder for various applications.

Construction

It is an essential ingredient in the cement-making process, providing the calcium necessary for the chemical reactions that form clinker and ultimately produce cement. Its abundance and versatility make it a cornerstone of the construction industry.

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Healthcare

Calcium carbonate is non-toxic, safe for consumption, and widely recognized as an effective and versatile ingredient in health and personal care products.

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Paper, plastic, paint, and rubber manufacturing

In the paper industry, calcium carbonate plays a crucial role as both filler and a coating material. It is widely used in the plastics industry as functional filler. It serves as a key ingredient in paints and coatings for various purposes.

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Agriculture & Animal Feeding

Calcium carbonate is a rich source of calcium, an essential mineral for animals. It supports healthy bone development, muscle function, and nerve signaling in livestock and poultry.

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Technical
Details

Here are technical details and information about calcium carbonate powder which TARAZ produce.

Chemical Properties
  1. Chemical Formula: The chemical formula of calcium carbonate is CaCO₃.
    1. Molecular Weight: The molecular weight of calcium carbonate is approximately 100.09 g/mol.
      1. Solubility: Calcium carbonate is poorly soluble in water (about 0.0013 g/100 ml at 25°C). However, it dissolves in acidic solutions, such as hydrochloric acid, forming calcium chloride, carbon dioxide, and water.
        1. PH: Calcium carbonate has a neutral pH (around 9.5 in water), making it mildly alkaline.
          1. Chemical Reactivity: It reacts with acids to produce carbon dioxide gas (CO₂). For example it also reacts with water under high pressure to form calcium hydroxide (slaked lime) and carbon dioxide.
          Physical Properties
          1. Appearance: Calcium carbonate is typically a white, odorless powder or fine granules.
            1. Particle Size: The particle size of calcium carbonate powder can range from a few microns (for fine-grade powder) to several millimeters (for coarse grades). Finer powders have a higher surface area, which is desirable for certain applications like paints and plastics.
              1. Density: The bulk density of calcium carbonate powder is around 0.9 - 1.1 g/cm³, depending on the grade and fineness.
                1. Hardness: Calcium carbonate has a hardness of around 3 on the Mohs scale, making it relatively soft.
                  1. Specific Surface Area: The specific surface area of fine calcium carbonate can range from 1 to 10 m²/g, depending on the particle size and manufacturing process.
                    1. Brightness: Calcium carbonate powder is highly white, with a brightness of 90-98% depending on the purity and quality of the material.
                      1. Reactivity with Heat: When heated to temperatures above 800°C, calcium carbonate decomposes into calcium oxide (CaO) and carbon dioxide (CO₂) through thermal decomposition:
                      Technical Specifications
                      1. Purity: High-purity calcium carbonate typically contains more than 99% CaCO₃, while lower grades may contain impurities like magnesium, iron, and silica.
                        1. Moisture Content: Calcium carbonate powder generally has a moisture content of less than 0.5%, depending on storage conditions.
                          1. Bulk Volume (Tapped Density): The tapped density is typically between 1.0 - 1.3 g/cm³, depending on the fineness and method of production.

                          These chemical and physical properties make calcium carbonate an essential and versatile material for a wide range of applications in various industries.

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