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Extraction and processing

When is enough good enough? Extraction and processing Raw materials employed in the manufacture of cement are extracted by quarrying in the case of hard rocks such as limestone, slates, and some shales, with the aid of blasting when necessary. Some deposits are mined by underground methods. Softer rocks such as chalk and clay can [...]

Extraction and processing2021-11-07T10:34:55+03:30

Oilwell Cement

When is enough good enough? Definition - What does Oilwell Cement mean? Oilwell Cement is designed for cementing offshore and onshore wells under high pressure and temperature. Its main components are pozzolanic or portland cement along with organic retarders. It prevents the cement from setting too quickly. It is made under [...]

Oilwell Cement2021-11-07T10:36:55+03:30


When is enough good enough? Hematite, also spelled haematite, heavy and relatively hard oxide mineral, ferric oxide (Fe2O3), that constitutes the most important iron ore because of its high iron content (70 percent) and its abundance. Its name is derived from the Greek word for “blood,” in allusion to its red colour. Many of the various forms [...]

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