Extraction Of Iron

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Extraction Of Iron          

Iron, perhaps the most important element to all civilization is also one of earth's most abundant. Like the majority of metal ores, iron ores are not pure compounds. Rather, most iron ore are polluted with sand, rock and silica.

The process of extracting iron involves a number of steps.

The first step to concentrate the iron ore and remove its contents of

To further remove any existing impurities, a complex process takes place in a . The is where materials are placed into the blast furnace. These materials are: Ore, Limestone and Coke.

A burst of hot, oxygen enriched air is blown into thelocated at the near bottom of the furnace. What follows are a number of and type reactions which ultimately produce the metallic iron.

One of these reactions is the coke being burnt. The heat generated by this reaction increases the bottom of the furnace to a temperature near 19000° C. This reaction is represented in a chemical equation:

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C(s) + O2(g) ® CO2(g) + heat

The generated rises halfway up the furnace, where it reacts with the hotter coke. This causes the carbon dioxide to reduce into . This reaction absorbs some heat and lowers the temperature of the upper part of the furnace to roughly 1300° C.

CO2(g) + C(s) + heat ® 2CO(g)

This carbon monoxide then reduces the iron oxide to a metallic iron, which is at the temperature of the reaction. This takes place in middle and upper parts of the furnace.

3CO(g) + Fe2O3(s) ® 2Fe(l) + 3CO2(g)

The in the charge is ...

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The technical terms used are to the level expected at GCSE and in some cases go beyond this level. The student has followed scientific conventions and rules about writing about process by not dramatising or adding in information that is not relevant. The spelling, punctuatuon and grammar are all fine. Just remember that explain terms and phrases that you would not have understood before you went on the course to show your teacher/the examiner what you have learnt as this will help you gain extra marks.

The fact that equations and diagrams that are relevant and explained not just put in for the sake of shows that the student knows what they are talking about. But some words I do believe could have been explained to a greater extent because it left me wondering if tne student did at some points know what they were talking about. Otherwise this is a well planned and thought out response. The fact that background information has been given on the two metals gives the reader a context in which to place the two extraction processes. Underlining key phrases and terms is a scientific skill that will help you pick up marks easier as the examiner will not have go hunting for the marking points they will be immediately brought to his attention.

The student has answered the questions well going into great detail about the processes. They have appeared to have answer the question fully.