Separations of Magnesite, Dolomite and Siliceous Minerals from Limestone, by Ore-Dressing Methods

It is reported that Patiala State in East Punjab has very extensive deposits of Limestone, running to many million tons, but its magnesia content is too high to be used as it is, for cement manufacture. To enable these deposits to be exploited for utilisation by the cement industry, the magnesia content has to be brought within the prescribed limits by any of the known processes. An attempt is made in this report to present all the methods available from current literature, for the separation of limestone from magnesite, dolomite and siliceous minerals, by ore-dressing methods.