WILLIAMS, Peter; CLOETE, Thomas. The production and use of citric acid for the removal of potassium from the iron ore concentrate of the Sishen Iron Ore Mine, South Africa. South African Journal of Science, [S. l.], v. 106, n. 3/4, p. 5 pages, 2010. Disponível em: https://sajs.co.za/article/view/10170. Acesso em: 18 apr. 2024.