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Describe any three of the following: (i) Iron ore, (ii) Galvanised steel, (iii) Tuyere, (iv) Tinplate. - Leaving Cert Engineering - Question b - 2014
Question b
Describe any three of the following: (i) Iron ore, (ii) Galvanised steel, (iii) Tuyere, (iv) Tinplate.
Worked Solution & Example Answer:Describe any three of the following: (i) Iron ore, (ii) Galvanised steel, (iii) Tuyere, (iv) Tinplate. - Leaving Cert Engineering - Question b - 2014
Step 1
Iron ore
Answer
Iron ore is the raw material from which iron is extracted. It is primarily composed of iron oxides and is mined from the earth. The ore is then smelted in a blast furnace to produce pig iron, which is an intermediate product utilized in the creation of steel. This smelting process typically involves the addition of coke and limestone to purify the iron, resulting in a material that is further refined for various industrial applications.
Step 2
Galvanised steel
Answer
Galvanised steel is regular steel that has been coated with a layer of zinc to protect it from oxidation and corrosion. This process is known as galvanization, and it enhances the durability of the steel by preventing moisture from reaching the surface. Galvanised steel is often used in outdoor construction and for items that may be exposed to harsh environments, ensuring a longer lifespan of the product.
Step 3
Tuyere
Answer
A tuyere is a pipe through which air is blown into a furnace, particularly a blast furnace. It plays a critical role in the smelting process by allowing large volumes of air to enter the furnace, which supports the combustion of coke. This increased airflow enhances the temperature within the furnace, facilitating the efficient burning of fuel and optimizing the overall metallurgical process.