Production ProcessProcessing and production of industrial fillers based on calcium carbonate

Calcium carbonates created and used in Australia are an important font of raw ingredients. Commercial calcium carbonate as powders, granules and slurries are created by two methods: the extraction and processing of natural ores, or through chemical precipitation in factories.

GCC, or ground calcium carbonate, is mainly made from Australian dolomite and limestone.

.Calcium Carbonate Production

Of the many reserves of dolomite and limestone in Australia, there are not too many that are of good enough quality to be used in agricultural and industrial applications. Commercial extraction is only useful if the purity, thickness, colour and homogeneity are passable.

After being quarried, further processes are required in order for natural calcium carbonate of superior quality to be created – these are referred to as GCC, or ground calcium carbonate.

With the end results being either a dry or wet product (also called ‘slurry’; a suspension of calcium carbonate in water), the manufacturing procedure keeps the carbonate as close to its original form as possible.

Typically, procedures include washing, grinding, particle size classification and sometimes drying. Whether all these steps are carried out, and in what order, is determined by the intended purpose of the product. The materials are delivered in bags (or in bulk) if dry, and in bulk tankers by road or train if wet (slurry).