Alumina Yield in the Bayer Process; Past, Present and Prospects Edited by
TMS (The Minerals, Metals & Materials Society), 2007
ALUMINA YIELD IN THE BAYER PROCESS
PAST, PRESENT AND PROSPECTS
Roelof Den Hond1, Iwan Hiralal2, Ab Rijkeboer3
Alcor Technology, Clinckenburgh 10, 2343 JH Oegstgeest, The Netherlands
2
Hiracon, Prinses Irenelaan 2, 2273 DD Voorburg, The Netherlands
3
Rinalco, Helmlaan 16, 2244 AZ Wassenaar, The Netherlands
1
Keywords: hydrate, alumina, yield, liquor productivity, precipitation, fines destruction, digestion, sweetening, low temperature, high
temperature, extraction, recovery, mud-to-money, M2M-Technology
During the past decades a large number of alumina plants were
successful in economically increasing the productivity of the
Bayer liquor loop. Over a period of 25 years the benchmark
precipitation yield has increased from 70 g/l to 90+ g/l, whilst
producing sandy alumina.…