Other high-grade limestone sources for the cement industry in PNG include:
1. Dolomite: Dolomite is a type of limestone that contains magnesium as well as calcium carbonate. It is sometimes used as a raw material in the cement manufacturing process.
2. Chalk: Chalk is a soft, white limestone composed mainly of calcium carbonate. While it may not be as high-grade as calcium carbonate, it can still be used as a source of limestone for cement production.
3. Marl: Marl is a type of sedimentary rock that contains a mixture of clay minerals and calcium carbonate. It can be used as a raw material in cement manufacturing when blended with other high-grade limestone sources.
4. Oyster shell: In some regions with coastal areas, crushed oyster shells can be used as a calcium carbonate source for cement production. Oyster shells are rich in calcium carbonate and can be a sustainable alternative to traditional limestone sources.
5. Travertine: Travertine is a form of limestone deposited by mineral springs. It is commonly used as a building material but can also be utilized in the cement industry as a high-grade limestone source.
These are just a few examples of other high-grade limestone sources that can be used in the cement industry in PNG, apart from calcium carbonate. The availability of these limestone sources may vary depending on the specific location within the country.
Calcium carbonate is the major source of cement industry in png. Name other high grade limestone
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