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Sterlite is importing the low quality copper concentrate.

Sterlite Copper uses the World’s Best Quality Copper Concentrate with respect to highest copper content. It is evident from the data that the copper grades of various mines vary in the range of 25 to 28% Copper grade and nowhere in the entire world, custom concentrates in the market have copper grade at 80%. The data on the Mines and its grades are obtained by Vedanta from the M/s. Wood Mackenzie report, which is a globally accredited American metal and mining research and consultancy group.

All the metals in the copper concentrate are not fixed.

All the metals in the present in traces are technologically removed in the Gas Cleaning Plant and secondary gas scrubbers of the Petitioner Unit and are treated/fixed in the ETP cake, which is disposed in SLF.