Chapter 26: Ores, slag and ash

Notes 1. This Chapter does not cover: a. Slag or similar industrial waste prepared as macadam (2517); b. Natural magnesium carbonate (magnesite), whether or not calcined (2519); c. Sludges from the storage tanks of petroleum oils, consisting mainly of such oils (2710); d. Basic slag of Chapter 31;​ e. Slag wool, rock wool or similar mineral wools (6806); f. Waste or scrap of precious metal or of metal clad with precious metal; other waste or scrap containing precious metal or precious metal compounds, of a kind used principally for the recovery of precious metal (7112 or 8549); or g. Copper, nickel or cobalt mattes produced by any process of smelting (Section XV). 2. For the purposes of 2601 to 2617, "ores" means minerals of mineralogical species actually used in the metallurgical industry for the extraction of mercury, of the metals of 2844 or of the metals of Section XIV or XV, even if they are intended for non-metallurgical purposes. 2601 to 2617 do not, however, include minerals which have been submitted to processes not normal to the metallurgical industry. 3. 2620 applies only to: a. Slag, ash and residues of a kind used in industry either for the extraction of metals or as a basis for the manufacture of chemical compounds of metals, excluding ash and residues from the incineration of municipal waste (2621); and b. Slag, ash and residues containing arsenic, whether or not containing metals, of a kind used either for the extraction of arsenic or metals or for the manufacture of their chemical compounds. Subheading Notes 1. For the purposes of 2620.21.00, "leaded gasoline sludges and leaded anti-knock compound sludges" means sludges obtained from storage tanks of leaded gasoline and leaded anti-knock compounds (for example, tetraethyl lead), and consisting essentially of lead, lead compounds and iron oxide. 2. Slag, ash and residues containing arsenic, mercury, thallium or their mixtures, of a kind used for the extraction of arsenic or those metals or for the manufacture of their chemical compounds, are to be classified in 2620.60.00.