Notes on Minerals, Metals, and Metallurgy

Minerals and Metals

• Definition of Minerals:

  • Naturally occurring metals that form solid compounds, referred to as metallic compounds.

• Characteristics of Metals:

  • To qualify as a metal, a compound should have the following qualities:

  • Abundance in nature

  • Feasibility for extraction

  • High metal content

  • Low production cost

• Definition of Ores:

  • Any mineral from which metal can be extracted easily and economically is termed an ore of that mineral.

Common Metals and Their Ores

• Aluminium (Al):

  • Ore: Bauxite

  • Chemical Formula: Al₂O₃ · 2 H₂O

• Iron (Fe):

  • Ores:

  • Haematite (Fe₂O₃)

  • Magnetite (Fe₃O₄)

• Copper (Cu):

  • Ores:

  • Copper pyrites (CuFeS₂)

  • Copper glance (Cu₂S)

  • Cuprite (Cu₂O)

• Zinc (Zn):

  • Ores:

  • Zinc blende (ZnS)

  • Calamine (ZnCO₃)

• Tin (Sn):

  • Ore: Tinstone (Cassiterite, SnO₂)

Metallurgy

• Definition of Metallurgy:

  • The process of extraction and purification of metals from their ores.

• Stages of Metallurgy:

  1. Concentration of Ores:

  • The process of removing impurities from the ore to increase the percentage of metal locked in the ore.

  1. Extraction of Metal from Concentrated Ores:

  • Techniques employed to extract the metal from the concentrated ores varies depending on the metal and its properties.

  1. Refining of Metal:

  • The purification process of the extracted metal to remove residuals and enhance the quality of the metal product.

    • Each of these stages is crucial for ensuring that the maximum yield and quality of the final product are achieved in metallurgy.