Other

26.20 - Slag, ash and residues (other than from the manufacture of iron or steel) containing metals, arsenic, or their compounds. - Containing mainly zinc : 2620.1 1 - - Hard zinc spelter 2620.19 - - Other - Containing mainly lead : 2620.21 - - Leaded gasoline sludges and leaded anti-knock compound sludges 2620.29 - - Other 2620.30 2620.40 2620.60 - Containing mainly copper - Containing mainly aluminium - 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 - Other : 2620.91 2620.99 - - Containing antimony, beryllium, cadmium, chromium or their mixtures - - Other This headin8 covers slag, ash and residues (other than those of heading 26.18, 26.19 or 71.12) which contaming metals, arsenic (whether or not containing metals) or their compounds, and which are of a kind used in industry either for the extraction of arsenic or metals or as a basis for the manufacture of their chemical com ounds. They result fiom the treatment of ores or as mattes) or from electrolytic, chemical or other intermediate metallurgical products processes which do not involve the mechanical working of metal. Waste which derives fiom the mechanical worlung of metal, or scrap which consists of worn-out or broken metal articles is excluded (Section XIV or XV). On the other hand, scalings, which are essentially oxides although deriving from the mechanical working of non-ferrous metal, also fall in this heading. (sue\ The heading includes : (I) Mattes (other than copper, nickel or cobalt mattes (Section XV)) and slag or dross, for example those rich in copper, zinc, tin, lead, etc. (2) Hard zinc spelter, residue from galvanisation by dipping in molten zinc. (3) Sludge from electrol ic baths after the preparation or refining of metal, and electro-galvanising slu ge. d" (4) Accumulator sludge. (5) Residues from electrolytic metal refining, dried or concentrated in block form. (6) Residues from the manufacture of copper sulphate. (7) Impure cobalt oxides resulting from the treatment of silver-bearing ores. (8) Spent catalysts usable only for the extraction of metal or for the manufacture of chemicals. (9) Residual carnallite lyes, mainly used for obtaining magnesium chloride. (10) Leaded gasoline slud es and leaded anti-knock leaded gasoline and eaded anti-knock compounds (including tetraethyllead and storage tanks). In general, such sludges and contain practically no petroleum oils. f (1 1) Flue dusts from zinc, lead or copper smelting. Generally, arsenic is resent in the flue dusts from copper and lead smelting, and thallium is present in the flue usts from lead and zinc smelting. B (12) Sla , ash and residues fiorn zinc, lead or copper smelting and rich in mercury usually as oxi e, sulphide or as an amalgam with other metals. (13) Slag, ash and residues containin antimony, beryllium, cadmium, chromium or their mixtures. These are generally in i e form of wastes arising from processing (e.g., heat treatment) of goods containing these metals. (14) Slag, ash and residues fiom wastes resulting from the production, formulation and use of inks, dyes, pigments, paints, lacquers and varnishes, of a kind used for the recovery of metals or their compounds. The heading also excludes : (a) Ash and residues from the incineration of municipal waste (heading 26.21). (b) Sludges ffom the storage tanks of petroleum oils consisting mainly of such oils (heading 27.10). (c) Chemically defined compounds of Chapter 28. (d) Waste and scrap of precious metals or of metal clad with precious metal (including e.g., spent. or damaged catalysts in the form of platinum allo gauze) and other waste and scrap contaivmng precious metal or precious metal compounds, of a ind used principally for the recovery of precious metal (heading 71.12). (e) Scrap metal resulting fiom the mechanical working of the metals of Section XV. (f) Zinc dust (heading 79.03).