Snyman, C.P.Grubb, P.L.C.2022-01-122022-01-1219/8/20211983*http://hdl.handle.net/2263/83274Thesis (PhD)--University of Pretoria, 1983.Refractory clay is defined for the purposes of this study as having a fusion temperature of at least I 605°c (Seger cone 27). It can be regarded as one of the most important industrial raw materials in view of its impact on virtually all high-temperature industries. Long-term statistics reveal the somewhat alarming trend that more flint than non-flint refractory clay will be consumed in South Africa over the next 20 years in spite of the much more limited reserves of the former. The basic aims of the study were to locate sufficient resources of refractory clay and to investigate aspects which could serve as an aid in future exploration.en© 2021 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.UCTDRefractory claysThesis