Chepushtanova Vasilevskaya T.A. monograph is dedicated to the urgent problem pyrite bearing materials treatment. The specification of theoretical aspects of pyrite thermal decomposition with forming of nonstoichmetric pyrrhotites allow to decide the urgent problem the involving of refractory pyrite, arsenopyrite and chalcopyrite bearing raw materials to industry. The establishing theoretical results give the opportunity to elaborate the technology of pyrite bearing materials treatment. This book is meant for mining and metallurgy sector, chemical industry, universities, research institutes,...