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Zorluk: KolayMineral Resources and Mining in Africa

Arrange the following stages involved in the extraction and processing of bauxite into aluminum metal in Africa in the correct sequential order, from initial extraction to final metal production.

  1. 1Open-cast surface mining to extract raw bauxite ore from the ground.
  2. 2Crushing and washing of raw bauxite to remove soil and clay impurities.
  3. 3Chemical refining of bauxite using the Bayer process to yield alumina (aluminum oxide).
  4. 4Electrolytic smelting of alumina to produce refined aluminum metal.

Cevap

The correct sequence is: Open-cast surface mining to extract raw bauxite ore from the ground → Crushing and washing of raw bauxite to remove soil and clay impurities → Chemical refining of bauxite using the Bayer process to yield alumina (aluminum oxide) → Electrolytic smelting of alumina to produce refined aluminum metal.
The correct sequence follows the standard aluminum industrial processing chain: open-cast mining extracts raw bauxite, crushing and washing removes physical waste, chemical refining converts bauxite to alumina powder, and electrolytic smelting yields finished aluminum metal.

Adım Adım Çözüm

1
Identify the primary mining stage.
Open-cast surface mining comes first.
Bauxite deposits lie near the surface and must be extracted from the ground before processing can begin.
2
Identify the physical preparation stage.
Crushing and washing raw ore is the second step.
Washing separates loose dirt, soil, and clay impurities from extracted ore chunks.
3
Identify the chemical refining stage.
Chemical refining via the Bayer process to produce alumina is the third step.
Washed bauxite is chemically treated to extract pure aluminum oxide (alumina) powder.
4
Identify the metal smelting stage.
Electrolytic smelting of alumina into aluminum metal is the final step.
Alumina is subjected to high-energy electrolysis to break chemical bonds and form pure molten aluminum metal.

Anahtar Kavram

Stages of Bauxite Extraction and Processing in African Mining
Tahmini Süre:45s
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Konular

Mineral Resources and Mining in Africa

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