8104 20 000 0 — Magnesium and articles thereof, including waste and scrap: waste and scrap

8104 Magnesium and articles thereof, including waste and scrap (+): – raw magnesium: 8104 11 – – containing at least 99.8 wt.% magnesium 8104 19 – – other 8104 20 – waste and scrap 8104 30 – sawdust, shavings and pellets, sorted by size; powders 8104 90 – other

Magnesium is isolated from various raw materials, most of which are not of Chapter 26 (ores), but of Chapter 25 or 31, for example, dolomite (heading 2518), magnesite (or giobertite) (heading 2519), and carnallite (heading 3104). It is also isolated from seawater or natural brines (heading 2501) and from rocks containing magnesium chloride. In the first stage of industrial metal production, magnesium chloride or magnesium oxide (magnesium) is produced by a method that depends on the source of magnesium used. Subsequently, magnesium isolation is usually based on one of two processes: (A) Electrolysis of molten magnesium chloride mixed with fluxes, such as chlorides or alkali metal fluorides. Isolated magnesium collects on the surface of the bath around the cathode, and chlorine on the anodes. (B) Thermal reduction of magnesium oxide with carbon, ferrosilicium, silicon carbide, calcium carbide, aluminum, etc. The high reaction temperature leads to the evaporation of the metal, which after rapid cooling condenses in its pure form. Metal obtained by electrolysis usually requires further purification. Magnesium obtained by thermal reduction is usually so pure that it can be melted and poured into ingots without further purification. Magnesium is a silvery-white metal, similar to aluminum, but lighter than it. He's very.

It is well polished, but when aged in air, polishing disappears very quickly due to the formation of an oxide film, which protects the metal from corrosion. Wire, strips or tapes, foil and magnesium powder are actively lit with dazzling light and should be handled with caution. A fine magnesium powder in the presence of air can explode. Non-alloyed magnesium is used to produce many chemical compounds, as a deoxidizer and desulfurator in metallurgy (for example, in the production of iron, copper, nickel and alloys based on them), in pyrotechnics, etc. Pure metal has poor mechanical properties, but with other elements it forms strong alloys that can be rolled, forged, extruded, cast and therefore it finds wide application in the production of light metals. Basic alloys which may be classified in this Chapter in accordance with Note 5 to Section XV (see General Provisions to this Section) include: (1) Magnesium-aluminum or magnesium-aluminum-zinc alloys, often containing manganese. These include alloys te pa "electron" or "dow", which are alloys based on magnesium. (2) Magnesium-zirconium alloys, often containing zinc additives. (3) Magnesium-manganese or magnesium-cerium alloys. The lightness, strength and corrosion resistance of these alloys make them suitable for use in the aviation industry (for example, for engine casings, wheels, carburetors, magneto bases, gasoline or oil tanks); in the automotive industry; in construction structures; in the production of machine parts and accessories and warping, especially in textile machines (spindels, bobbins, motovile, etc.), for machine tools, typewriters, sewing machines, chain saws, lawn mowers, ladders or other loading mechanisms, as well as lith loading machines. The classification of magnesium products does not change as a result of their processing, such as described in the general provisions of Chapter 72, which is aimed at improving the properties, appearance, etc., of the metal. This heading includes: (1) Untreated magnesium ingots, incision bars, slabs, rods, cubes, square section blanks and similar shapes. These goods are intended mainly for rolling, drawing, extrusion or forging or for casting in order to obtain shaped products. (2) Magnesium waste and scrap The explanations to heading 7204 apply, mutatis mutandis, to this heading. This category of products includes sawdust, shavings and granules that have not been sorted by size. Sawdust, shavings and pellets that have been sorted by size are described in paragraph (3) below. (3) Tubs, profiles, plates, sheets and strips or tapes, foil, wire, pipes and tubes, hollow profiles, powders and scales, sawdust, shavings and pellets of a certain size. This category includes the following commercial types of magnesium:

(a) Articles (e.g. treated rods, profiles, wires, plates, sheets, strips or tapes and foils) obtained by rolling, dragging, extrusion, forging, stamping, etc., articles referred to in paragraph (1) above; pipes and tubes and hollow profiles (see the relevant explanatory notes to the headings concerning similar articles of other base metals). These products are used when metal is needed, light and strong at the same time (see above). (b) Sawdust, shavings and pellets of a certain size, and all kinds of powders and scales. These products are used in pyrotechnics (salutes, signals, etc.), as reducing agents in chemical or metallurgical processes, etc. Sawdust, shavings and granules are specially prepared and sorted so that they are suitable for these purposes. (4) Other products. This category includes all articles of magnesium not included in the preceding categories of goods not described in Note 1 to Section XV, not included in Chapter 82 or 83 or more specifically not listed elsewhere in the Nomenclature. Since magnesium is used primarily in aircraft, machinery and machine tools (see above), most of its products are classified in some other heading (mainly in Sections XVI and XVII). Articles classified herein include: (a) structures and parts of structures; (b) tanks, cysts and similar containers without mechanical or thermal equipment, as well as barrels, drums and bidons; (c) wire fabric; (d) bolts, nuts, screws, etc. This heading does not cover slag, ash and magnesium waste (heading 2620). Explanation of subheadings. Subheadings 8104 11 and 8104 19 This subheading also includes ingots and similar raw forms obtained by the melting of aluminium waste and scrap.