ESL Video Quiz: How it’s made - Aluminium

Quiz by: elodiesale
Quiz #: 18431
(ESL Category: listening) how Al is made

Take a look around and you'll find this wonder metal everywhere, in everything from screen doors to jet planes.

Aluminum has so many applications because it's light and strong, and it's corrosion and crack resistant. Producing aluminum is costly but it saves money over time.

Aluminum - so widely used today, and the world's most abundant metallic element - does not occur in a natural state. The most available source of aluminum is actually bauxite.

Bauxite is mainly mined in tropical countries. The aluminum atom in bauxite is bonded to oxygen molecules. These bonds have to be broken by electrolysis to produce pure alumina.

Bauxite is carried by rail to the plant where it will be crushed. Then through a chemical transformation called the Bayer process, alumina is extracted. This is then roasted in calcinors to eliminate all moisture.

This is the reduction facility.

This plant has four hundred thirty two pots through which a powerful electrical current will be passed to produce electrolysis.

An overhead crane dumps alumina into the pots, then the electric current from the anode passes through the alumina that we see here at the bottom of the pot.

Via the process of alumina reduction at seventeen hundred forty-two degrees, the anodes lose volume and will have to be replaced. It's a continuous operation. Each anode has a life span of about twenty days.

- Many applications / Beaucoup d’applications / meniː ˌæpləˈkeɪʃənz

- Light / Léger / ˈlaɪt

- Strong / Solide / ˈstrɔŋ

- Costly / Cher / ˈkɔsliː

- Bauxite / ˈbɔkˌsaɪt

- Electrolysis / Electrolyse / ɪˌlekˈtrɑləsəs

- Alumina / Alumine / əˈluːmənə

- Chemical transformation / Transformation chimique / ˈkemɪkəl ˌtrænsfərˈmeɪʃən

- Anode ˈæˌnoʊd

- Process of alumina reduction / Processus de reduction d’alumine / ˈprɑˌses əv əˈluːmənə rɪˈdəkʃən

- Continuous operation / Opération continue / kənˈtɪnjuːəs ˌɑpəˈreɪʃən

+22 -6
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