Kalsiyum Karbonat

 

WHAT IS CALCIUM CARBONATE?

Calcium Carbonate is a common chemical compound with the formula (CaCO3). limestone is a crystalline powder that is white and odorless. It has an 825 °C melting temperature and a density of 2.71 g/cm3. Although it is soluble in water, alcohol and other organic solvents have a limited ability to dissolve it. With the help of acids, the basic substance calcium carbonate may transform into salts and carbon dioxide.

ZUMRUT international kimya co. provides limestone of the best quality in a variety of types and grades and exports them from Turkey, and the United Arab Emirates to other nations worldwide.

Calcium Carbonate History

Egyptians Used lime (calcium oxide, derived from heating limestone) in construction, including the pyramids.
Romans Employed limestone and marble extensively in architecture and sculpture, such as the Colosseum and the Pantheon.

Medieval Period Construction Limestone was used in building and lime plaster was applied for both construction and artistic purposes.

It was used in the Medieval Ages as a construction whitewash and indigestion remedy. The ability of calcium carbonate to be employed in the production of paper was discovered in the 18th century, and it quickly rose to prominence as a key component. Nowadays, calcium carbonate is employed in a variety of fields, including as building, farming, drilling, polymers, and medicines.

CALCIUM CARBONATE TYPES

calcite comes in several types, distinguished by their physical form, source, and application. The primary types include:

  1. Ground Calcium Carbonate (GCC) :
    –  Description : Produced by crushing and grinding limestone or marble.
    –  Form : Usually a fine white powder.
    –  Uses : Extensively used as a filler in products like paints, rubber, plastics, and paper, and as a soil conditioner in agriculture.
  2. Precipitated calcite (PCC) :
    –  Description : Synthesized through a chemical process where calcium oxide or calcium hydroxide reacts with carbon dioxide.
    –  Form : Produced as a fine, white powder with a controlled particle size and morphology.
    –  Uses : Used in high-quality paper, pharmaceuticals, and food products due to its purity and consistency. Also used in plastics and coatings for its performance properties.
  3. Calcium Carbonate Powder :
    –  Description : Refers to both GCC and PCC in powdered form.
    –  Uses : Applied in similar industries as ground calcite, used in various formulations depending on its intended application.
  4. calcite Granules :
    –  Description : Produced by compressing calcium carbonate powder into granular form.
    –  Uses : Used in agriculture as a soil amendment and in various industrial applications where controlled release or specific handling characteristics are needed.
  5. Calcium Carbonate Filler :
    –  Description : Used specifically as a filler material.
    –  Uses : Found in plastics, rubber, and other manufacturing processes to enhance product properties and reduce costs.
  6. Calcium Carbonate in Natural Form :
    –  Description : Includes minerals such as limestone, marble, and chalk.
    –  Uses : Directly used in construction, landscaping, and as raw material in various industrial processes.

CALCIUM CARBONATE PRODUCTION

limestone is produced through several methods, depending on the desired form and purity. The primary production processes include:

  • Extraction from Natural Sources :
    –  Limestone Quarrying : limestone is extracted from natural limestone deposits through quarrying. The limestone is then crushed and ground to produce ground calcium carbonate (GCC).
    –  Marble Mining : Marble, a metamorphosed form of limestone, is also used. It is cut into blocks or slabs and processed into limestone products.
  • Ground Calcium Carbonate (GCC) :
    –  Crushing and Grinding : Limestone or marble is crushed into smaller pieces and then ground into a fine powder. This process involves several stages of grinding to achieve the desired particle size.
    –  Classification : The ground material is classified into various grades based on particle size and intended use.
  • Precipitated Calcium Carbonate (PCC) :
    –  Chemical Synthesis : PCC is produced by reacting calcium oxide (quicklime) or calcium hydroxide (slaked lime) with carbon dioxide in a controlled chemical process.
    –  Process Steps :
    –  Slaking : Calcium oxide is mixed with water to produce calcium hydroxide.
    –  Carbonation : Calcium hydroxide is reacted with carbon dioxide to form calcium carbonate. The reaction conditions (temperature, pressure, and CO2 concentration) are carefully controlled to produce PCC with specific properties.
    –  Filtration and Drying : The PCC is then filtered and dried to obtain the final powder.
  • Hydrated Calcium Carbonate :
    –  Description : Sometimes, limestone is processed to produce a form with added water (calcium carbonate hydrate), though this is less common compared to GCC and PCC.

CALCIUM CARBONATE

DIFFERENCE BETWEEN TYPES OF limestone

The main differences between the types of calcium carbonate—Ground Calcium Carbonate (GCC) and Precipitated limestone (PCC)—lie in their production processes, physical properties, and applications. Here’s a comparison:

1- Production Process :
–  Ground calcite (GCC) :
–  Source : Mined from natural deposits of limestone or marble.
–  Process : Crushed and ground to a fine powder.
–  Method : Physical grinding, with minimal chemical processing.

–  Precipitated calcite (PCC) :
–  Source : Produced synthetically.
–  Process : Created by reacting calcium oxide or calcium hydroxide with carbon dioxide in a controlled chemical process.
–  Method : Chemical precipitation with precise control over particle size and morphology.

2- Physical Properties :
–  Ground calcite (GCC) :
–  Appearance : Typically a coarser, more granular powder.
–  Particle Size : Varies, but generally larger and more variable compared to PCC.
–  Brightness : Often lower brightness compared to PCC.

–  Precipitated calcite (PCC) :
–  Appearance : Fine, white powder with a more consistent particle size and shape.
–  Particle Size : Can be controlled to produce very fine and uniform particles.
–  Brightness : Higher brightness and purity due to the chemical production process.

3-  Applications:
–  Ground limestone (GCC) :
–  Uses : Commonly used as a filler in products like paper, rubber, plastics, and paints. It is also used in construction and agriculture.
–  Cost : Generally less expensive due to the simpler production process.
–  Performance : Suitable for applications where high purity and controlled particle size are less critical.

–  Precipitated limestone (PCC) :
–  Uses : Often used in applications requiring high purity, fine particle size, and specific properties, such as in high-quality paper, pharmaceuticals, and food products.
–  Cost : More expensive due to the complex production process and high degree of control.
–  Performance : Provides superior performance in applications needing precise characteristics, such as in coatings and high-grade fillers.

4- Environmental Impact :
–  Ground calcite (GCC) :
–  Impact : Involves quarrying, which can have environmental impacts, though it is relatively low compared to other industrial processes.

–  Precipitated calcite (PCC) :
–  Impact : The chemical process requires more energy and resources, potentially leading to a higher environmental footprint.

MANUFACTURERS, EXPORTERS, AND IMPORTERS OF limestone

Calcium carbonate producing countries:

Several nations, including Iran, China, India, the United States, and Mexico, manufacture limestone. With large quantities of top-notch limestone, Iran is one of the top manufacturers of calcium carbonate.

Calcium carbonate importing countries:

Several nations across the globe, including the United States, Canada, Australia, and European nations, import calcium carbonate. For their industrial and commercial purposes, these nations depend on the importation of calcium carbonate, which is transported in significant amounts by both sea and air.

Calcium carbonate exporting countries:

Several nations export limestone, including Iran, the United Arab Emirates, Turkey, and other nations. The main raw material used in the manufacturing of calcium carbonate is limestone, which is abundantly available in these nations. Several nations rely heavily on the export of calcium carbonate to help them satisfy the demand for the commodity on a worldwide scale.

CALCIUM CARBONATE APPLICATIONS

limestone has a wide range of applications across various industries due to its versatile properties. Here are some of the key applications:

  1. Industrial Applications :
    –  Construction : Used in the production of cement and concrete. Also used as a building material in the form of marble and limestone.
    –  Paints and Coatings : Acts as a filler and extender to improve paint properties, such as durability and gloss.
    –  Plastics : Used as a filler to improve mechanical properties and reduce production costs.
    –  Rubber : Enhances the properties of rubber products, providing strength and durability.
    –  Paper : Used as a filler and coating pigment to improve brightness, opacity, and printability.
  2. Agricultural Applications :
    –  Soil Amendment : Applied to acidic soils to neutralize pH, improving soil health and crop yields.
    –  Animal Feed : Used as a calcium supplement in animal feed to promote bone health and growth.
  3. Environmental Applications :
    –  Water Treatment : Used to treat acidic waters by neutralizing pH and removing impurities.
    –  Flue Gas Desulfurization : Used in power plants to remove sulfur dioxide from flue gases, reducing air pollution.
  4. Medical and Pharmaceutical Applications :
    –  Dietary Supplement : Provides a source of calcium for bone health, used in calcium tablets and fortified foods.
    –  Antacid : Neutralizes stomach acid, providing relief from heartburn and indigestion.
    –  Pharmaceutical Excipient : Used as an inactive ingredient in tablets and other pharmaceutical formulations.
  5. Food and Beverage Applications :
    –  Food Additive : Used as a calcium supplement and as a firming agent in canned vegetables and fruits.
    –  Baking : Used as a leavening agent and as a calcium source in fortified flour.
  6. Cosmetic Applications :
    –  Skincare Products : Used as a mild abrasive in toothpaste and as a bulking agent in cosmetics.
    –  Body Care : Found in various creams, lotions, and powders.
  7. Household Applications :
    –  Cleaning Products : Used as a mild abrasive in cleaning powders and scouring products.
    –  Deodorants : Utilized in deodorant formulations due to its absorbent properties.
  8. Miscellaneous Applications :
    –  Ceramics and Glass : Used in the production of ceramics and glass, where it acts as a stabilizer and improves workability.
    –  Adhesives and Sealants : Improves the properties of adhesives and sealants, providing stability and enhancing performance.

Certificate of Analysis Calcium Carbonate

Item Specification Test Result
Appearance White powder White powder
Identification
i)Test for Calcium
ii)Test for Carbonate
Passes the test Passes the test
Assay(On dried basis) 98.5~100.5% 99.6%
Loss on drying(200℃ for 4 hours) ≤2.0% 0.13%
Acid-insoluble Substance ≤0.2% 0.01%
Limit of fluoride ≤50 ppm <50 ppm
Lead (Pb) ≤3 ppm <1 ppm
Arsenic(As) ≤3 ppm <1 ppm
Mercury(as Hg) ≤0.5 ppm <0.5 ppm
Cadmium( Cd) ≤1 ppm <1 ppm
Barium Negative Negative
Iron ≤200 ppm <200 ppm
Limit of Magnesium&Alkali salts ≤1.0% 0.6%
Heavy metals (Pb) ≤20 ppm <20 ppm
Through 325mesh ≥99% 99.9%

 

Certificate of Analysis Calcium Carbonate