3816000000 under HS Code REFRACTORY CEMENTS, MORTARS, CONCRETES AND SIMILAR COMPOSITIONS, OTHER THAN PRODUCTS OF HEADING 3801, 6815990009 under HS Code Others, and 6903209000 under HS Code OTHER REFRACTORY CERAMIC GOODS (FOR EXAMPLE, RETORTS, CRUCIBLES, MUFFLES, NOZZLES, PLUGS, SUPPORTS, CUPELS, TUBES, PIPES, SHEATHS AND RODS), OTHER THAN THOSE OF SILICEOUS FOSSIL MEALS OR OF SIMILAR SILICEOUS EARTHS - CONTAINING BY WEIGHT MORE THAN 50% OF ALUMINA (AL2O3) OR OF A MIXTURE OR COMPOUND OF ALUMINA AND OF SILICA (SIO2): OTHER were the top imported HS Codes by JOINT STOCK COMPANY EVRAZ NIZHNETAGIL METALLURGICAL PLANT in 2021.