removing sand from bentonite processing
EP1387729B1 EP20020739244 EP02739244A EP1387729B1 EP 1387729 B1 EP1387729 B1 EP 1387729B1 EP 20020739244 EP20020739244 EP 20020739244 EP 02739244 A EP02739244 A EP 02739244A EP 1387729 B1 EP1387729 B1 EP 1387729B1 Authority EP European Patent Office Prior art keywords sand slurry bentonite clay stream house dust Prior art date 2001-05-15 Legal status (The …