... позволило бы получать крупнозернистый глинозем высших марок так называемого песочного типа (sandy alumina); применение такого глинозема в производстве алюминия дает высокий технологический и экологический эффект;
http://www.referun.com/n/usovershenstvovanie-tehnologii-polu...

Two Perspectives on the Evolution and Future of Alumina
As a result, particularly of these feeder changes, the demands on
alumina quality have also changed. The so called Floury Alumina
(with fine particle sizes, low specific surface areas and high alpha
alumina contents) has poor flow and dissolution characteristics
and has been displaced by Sandy Alumina (with larger particle
sizes, high surface areas and low alpha alumina content).
Light Metals 2011 - Результат из Google Книги
books.google.com.ua/books?isbn=1118061918...