Published on February 15, 2009
Common metal ores
Extraction of metals What is an ore deposit? Most metals react with other elements to form ores which occur naturally on earth. An ore is a rock from which useful metals can be extracted.
Extraction of metals Figure: Stages involved in extracting metal from their ores.
What about Aluminium? Extraction of bauxite: Negative terminal: A l 3+ (l) + 3e A l (l) Positive terminal: O 2- (l) O 2 (g) + 4e Overall process: 2 A l 2 O 3 4 A l (l) + 3O 2 (g)
Why recycle metals? Metals are finite resources. In other words, the amounts of the various metals in the earth are limited. Figure shows how long it will take for the reserves of common metals to run out.
Recycling aluminium cans
Aspects of recycling Group work Form groups of five each. Discuss the benefits and disadvantages of recycling. Each group will be assigned to touch on either the social, economic or environmental aspects of recycling. Present your findings at the end of discussions.
Form groups of five each.
Discuss the benefits and disadvantages of recycling.
Each group will be assigned to touch on either the social, economic or environmental aspects of recycling.
Present your findings at the end of discussions.
Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are ...
This page looks at the various factors which influence the choice of method for extracting metals from their ores, including reduction by carbon, reduction ...
Extraction of Metals. Metal Extraction Electrolysis. The History of Metals. Aluminium Extraction Properties and Uses. Iron
1. Introduction to the extraction of metals. What methods can be used in extracting metals from mineral ores? The Earth's crust contains many different ...
Methods of extraction Many metals are found in the Earth's crust as ores. An ore is usually a compound of the metal mixed with impurities. When the metal ...
NGO campaigns such as MakeITFair and Enough have highlighted social, environmental and humanitarian issues associated with the extraction of certain metals ...
Methods of extracting metals. ... Reactivity and extraction method. Metals are produced when metal oxides are reduced (have their oxygen removed).
Vocabulary words for Extraction of metals : Iron. Includes studying games and tools such as flashcards.
Extracts from this document... Introduction. Occurrence of Metals in the Earth Crust Metals are found in the earth's crust. The least reactive metals are ...