Aluminium dross recycling

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/aluminium-dross-recycling

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary composition?Mixture of metallic aluminium (20-70%), aluminium oxide, entrained salts, and impurities
2. What is the key separation principle?Exploitation of density and particle size differences via mechanical means
3. What is aluminium dross?Aluminium dross is a waste that forms when molten aluminium reacts with oxygen during smelting. It contains some metal, aluminium oxide, and other small bits.
4. Where does aluminium dross come from?It is made during primary aluminium smelting and when recycled aluminium is melted again. The heat and oxygen turn part of the metal into a sticky, mixed material.

Aluminium Smelting: The industrial process of extracting aluminium metal from its ore.
Secondary Aluminium: Aluminium produced from recycling scrap metal, rather than virgin ore.
Valorization: The process of increasing the value or usefulness of a material or product.