To produce Portland cement, limestone is mixed with raw materials such as siliceous stone and clay and is heated to about 1,450 °C. During this process, an intermediate product called ‘clinker ...

PRELIMINARY research findings in the Nyerere National Park and the Selous Game Reserve show the existence of various minerals ...

India’s cement industry is bracing for higher costs after Tamil Nadu imposed a ₹160 per tonne mineral tax on limestone, a key raw material. The levy comes at a precarious time—cement makers ...

This tax is over and above the royalty payable on limestone mining. Limestone is a key raw material for manufacturing cement and accounts for ~60-65 percent of the raw material cost and ~4-5 ...