2602
MANGANESE ORES AND CONCENTRATES,
cold water, decomposed by hot water; used in gold metallurgy. Potassium manganate (K MnO ), in small greenish-black crystals. Used for preparing the 2 4 permanganate. Barium manganate (BaMnO ), obtain...
2606
ALUMINIUM ORES AND CONCENTRATES
This heading covers bauxite (hydrated aluminium oxide containing variable proportions of iron oxide, silica, etc.). The heading also covers bauxite, heat-treated (1,200 °C to 1,400 °C) suitable for us...
2619
SLAG, DROSS (OTHER THAN GRANULATED SLAG), SCALINGS AND OTHER WASTE FROM THE MANUFACTURE OF IRON OR STEEL
manufacture of iron or steel. The slags covered by this heading are silicates of aluminium, calcium or iron obtained during the smelting of iron ore (blast furnace slag), the refining of pig iron or t...
2620
SLAG, ASH AND RESIDUES (OTHER THAN FROM THE MANUFACTURE OF IRON OR STEEL), CONTAINING ARSENIC, METALS OR THEIR COMPOUNDS
Both natural steatite and talc are mineral substances rich in hydrous magnesium silicate. The former is more compact and massive than talc. Talc is foliated and softer and soapier to the touch. Natura...