bentonite clay suppliers in durban BINQ Mining
Jul 02, 2013· Durban Harbour tunnel—first use of a slurry tunnel boring . – saimm. 7 Feb 2008 . Wittneben‡. Synopsis. Durban Harbour in South Africa is one of the continent''s busiest . worldwide and discussions with TBM led to the . classified as dense fine cohesionless sand with a clay/silt content in the .. excavations were carried out under bentonite slurry to maintain ...