Extraction of Iron

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PowerPoint Presentation:

Iron extractin By Dr.T.Bhaskara Rao Dept of Chemistry K L University

Learning Objectives :

Learning Objectives Understand which metals can be extracted using carbon Be able to describe how a blast furnace works

PowerPoint Presentation:

The Reactivity Series potassium sodium calcium magnesium aluminium zinc iron copper gold ( carbon ) Increasing reactivity Metals above carbon must be extracted using electrolysis. Metals below carbon can be extracted from the ore by reduction using carbon, coke, or charcoal. Gold and silver often do not need to be extracted. They occur native. The reactivity of a metal determines the method of extraction. lead silver

PowerPoint Presentation:

Why does Iron have to be extracted in a Blast Furnace??? Iron can be extracted by the blast furnace because it can be displaced by carbon. This is more efficient method than electrolysis because it is more cost effective

Iron age:

Iron age Iron – 2 nd most common metal in the Earth’s crust Found as haematite Iron (III) oxide (Fe 2 O 3 ) Sand Can be obtained using a blast furnace

PowerPoint Presentation:

What is a Blast Furnace? The purpose of a blast furnace is to reduce and convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick. Iron ore, coke and limestone are put into the top, and preheated air is blown into the bottom.

PowerPoint Presentation:

12/25/2013 Source: Confidential 7

Reduction of iron ore:

Reduction of iron ore carbon + oxygen  carbon dioxide Carbon dioxide + carbon  carbon monoxide Carbon monoxide + iron oxide  iron + carbon dioxide

Removing impurities:

Removing impurities Calcium carbonate  calcium oxide + carbon dioxide Calcium oxide + silicon dioxide  calcium silicate This is called SLAG

Summary of the process:

Summary of the process Iron is not found naturally, but in Iron Ore We can extract iron form iron ore using a Blast Furnace Using chemistry we can produce pure iron Limestone (CaCO 3 ) is used to remove impurities Coke/Carbon gives us the high temperature we need for the reactions to take place

Learning outcomes:

Learning outcomes Why can some metals be extracted using carbon when some can’t? What do we use to extract iron? How does a blast furnace work? What chemical reactions take place?

Extraction of Iron :

Extraction of Iron

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