FUSION OF CALCINED ALUMINA IN AN ELECTRIC ARC FURNACE. USED AS A RAW MATERIAL IN THE MANUFACTURE OF REFRACTORY PRODUCTS. CLASSIFIED AS ARTIFICIAL CORUNDUM, WHETHER OR NOT CHEMICALLY DEFINED, WHITE, PINK OR RUBY WITH AN ALUMINIUM OXIDE CONTENT EXCEEDING 97.5% BY WEIGHT.

CLASSIFICATION IS DETERMINED BY GENERAL RULES 1 & 6 TOGETHER WITH THE TEXT TO CN CODES 2818, 281810 AND 28181010.