· Cement Manufacturing Process Phase 1: Raw Material Extraction. Cement uses raw materials that cover calcium, silicon, iron and aluminum. Such raw materials are limestone, clay and sand. Limestone is for calcium. It is combined with much smaller proportions of sand and clay. Sand clay fulfill the need of silicon, iron and aluminum.
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ExxonMobil Nigeria (formerly, Mobil Producing Nigeria) is one of three Nigerian subsidiaries of the petroleum company began operations in 1955. All of its operations are offshore, where it owns 90 platforms on 3,200 square kilometres (1,200 sq mi; 790,000 acres) of territory. MPN is the second largest producer of crude oil in Nigeria after Shell.
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