Copper oxide fume generation

Thermal decomposition—Thermal decomposition methods may be used to prepare metal oxide fumes. An aerosol of a precursor to the metal oxide (i.e., a substance that is readily decomposed, thermally, to yield the oxide) is first generated and then is heated by passing it through a heated tube to decompose it to the oxide. Metal formates, oxalates, and the like, which readily yield the oxides and do not produce objectionable side products, are commonly used precursors. In this program, fumes of iron oxide, vanadium oxide, and copper oxide were generated using this method. 

Metal Oxide Fume Generator. Figure 11 shows a metal oxide fume generator that has been used for such materials as magnesium and copper oxides. 

Metal sulphides. Many metals (e.g., iron, copper, lead, nickel) are found as mineral ores in sulphide form (pyrites) of which iron sulphide is most common. These are concentrated by physical and chemical means to produce an ore ready for economical extraction. Some may be subject to oxidation to generate heat, deplete oxygen, and emit toxic fumes. Calcined pyrites are used in the production of sulphuric acid and sulphur dioxide. In the presence of moisture, the calcined residue or dust can generate acids. 

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