The results of treatment of solutions with high sulphates concentration and the high rate of water hardness are given. It is shown that significant reduction of secondary pollution by chlorides is achieved through integrated use of aluminium hydroxchloride and sodium aluminate coagulants. It was found that the efficiency of water purification from sulphates and water softening can be increased with the carbon dioxide processing.
 Belichenko Y.: Zamknytue Systemy Vodoobespecheniya Khimicheskih Proizvodstv. Khimiya, Мoskwa 1990.
 Lebedev V., Lokshin E. and Barmin I.: Obogashchenie Ryd, 2007, 3, 42.
 Kubasov V. and Chinkin V.: Tsvetnaya Metallyrgiya, 2010, 3, 26.
 Berengarten M., Baranov D. and Vorobyeva T.: Voda: Khimiya i Ekol., 2008, 1, 13.
 Butseva L. and Potapova L.: Ochistka Prirodnykh i Stochnykh Vod. Sbornik. NIIVODGEO, Moskwa 2009.
 Salnikova E., Gofenberg I., Turanina E., etc.: Khimiya i Techn. Vody, 1992, 14, 152.
 Salnikova E. and Peredery O.: Tsvetnye Metaly, 1983, 12, 22.