Calcium carbonate / Ground calcium carbonate (GCC)

Product Overview

Description

 

Ground Calcium Carbonate (GCC) or Limestone -

Calcium carbonate (calcite/form of limestone) is widely used in Plastics, Paints and Rubber as a filter due to its high dispersibility, low oil absorption, higher impact strength, smooth surface finish, easy processing and excellent dimensional stability.

Applications:

·  PVC CABLE COMPOUNDING

·  PAINTS

·  PAPER COATINGS

·  THERMOSET PLASTIC

·  VINYL FLOORINGS

·  PU FOAM (FLEXIBLE AND RIGID)

·  POWDER COATINGS.

·  PP COMPOUNDING FOR FURNITURES, AUTOMOBILES AND HOME APPLIANCES

·  ANTIFABRILLIANT MASTERBATCHES FOR PP AND LDPE WOVEN SACK

·  COLOUR MASTERBATCHES AND OTHER ADDITIVE MASTERBATCHES

.  OIL WELL DRILLING

 

 

Analysis Parameter

• Total Calcium as CaCO3 % 92-97
• Total Alkalinity As CaCO3 % Minimum 97.5
• Silicon Dioxide (SiO2) 1.5-5.0
• Magnesium Carbonate (MgCO3) 0.40-5.0
• Brightness Range % 84.68-90.32

Limestone is a common sedimentary rock composed primarily of the calcium carbonate mineral, calcite (CaCO3). Limestone constitutes approximately 10 percent of the sedimentary rocks exposed on the earth’s surface.

Limestone is formed either by direct crystallization from water (usually seawater), or by the accumulation of sea animal shells and shell fragments. In the direct crystallization case calcium ions in the seawater combine with atmospheric or dissolved carbon dioxide to form calcium carbonate, which being insoluble, precipitates out. Over time, layers of the calcium carbonate form, and with sufficient time and pressure from overlying materials, are transformed to solid rock. The chemical composition of seawater and its minerals contaminants will be recorded in the limestone impurities. Limestone frequently also contains the minerals dolomite or calcium magnesium carbonate (CaMg(CO3)2, and a second crystalline form of calcium carbonate, aragonite.

 

Pure calcite, dolomite, and aragonite which are in the limestones, are clear or white. However, with impurities, they can take on a variety of colors, commonly white, tan or gray. Limestone can also have gone through metamorphosis, with high pressure, heat and time creating marble. This process tends to intensify the color of the stone as well as changing the nature of some of the impurities. Metamorphosis creates the beautiful marbles seen in architectural applications.

 

Uses For Limestone Limestone and marble are important building materials in most parts of the world. They are used as cut dimension stone (blocks and slabs) for building. In the form of coarsely crushed stone or aggregate limestone is used for general building purposes, roadbeds and as a component in concrete. When heated, the calcium carbonate in limestone decomposes to lime, or calcium oxide, which also has many industrial applications, including the manufacture of precipitated calcium carbonate (PCC).

Ground calcium carbonate, commonly referred to as GCC, is very widely used as an industrial mineral. Three primary attributes: particle size, color and chemical purity define the quality of the GCC, and define the suitability of use for any given application.

 

Limestone color can range from brilliant white to light gray and chemical purity can range from only 80-90% calcium carbonate to well over 99.9% purity.