Long2

=**__Members of group 2 NW THEN__**= Charlie Clement (**Chilly--ov--Darlo**) Daniel Morrigan (**DANNY-2008**) Stephen Shepherd (**ste_ov_darlo_2k8**) Jamie Robinson (**J4mie**)

=**__Chapter 1: Iron and steel making:__**= - - How many kg of each element are oxidised of 100 kg hot metal ? Oxidised 4.5% of e --> 4.5kg 0.2% of mn --> 0.2kg 1.898 fe is oxidised 1.9 kg Fe -

How many kg of steel are produced ?  93kg of steel is produced -

Calculate the amount of energy that is generated during the process ?  Heat generation (mj/kg) Fe 4.3 x 1.9 = 8.17 Mj C 11.7 x 4.5 = 52.65 Mj Si 33.9 x 0.25 = 8.47 Mj

Mn 7.4 x 0.2 = __1.48 Mj__ 70.78 Mj

=__Part 2__= Dutch house uses 2000 Mj of gas/year Combustion gives 32 Mj/m3 =64,000 Mj
 * __- How much energy is used in natural gas a year per household ?__**

__**- The energy produced from how many Kg of hot metal is equivalent to the energy used in natural gas of one household ?**__ 100 Kg gives 70.78 Mj So 64,000 / 70.78 = __904 Kg__

=__Chapter 3 : Continuous casting__=

__**- How long does it take the steel to pass this section ?**__ Speed 0.1 M/S T = D/S = 6/0.1 __=__ __60 Seconds__

S = D/T = 78cm / 60 seconds = __1.3cm/s__
 * __- What is the minimun rising velocity for an inclusion entering at the bottom required to reach the surface within the section ?__**

0.1cm or less
 * __- For which particle size given in the table, all particles will reach the surface within this section?__**

225mm = 0.225m 1300mm = 1.3m 0.25 x 1.3 = 0.2925m2 0.2925 x 1.5 = __0.438m3__ 0.438 x 7000 = 3071.25Kg x2 = 6142 Kg = 6.14 Tonnes/minute
 * __- How many tons of slabs are produced per minute (density liquid steel 7000kg/m3) ?__**

__**- How many tons a year can be produced when operating 90% of the year ?**__ 6.14 x 60 x 24 x 365 = 3228498 tonnes x 0.9 = 2905648 tonnes.

__**- Why is casting so critical for the cleanliness of the steel ?**__ for the strength of the steel.

__**- Which inclusion is worse : an inclusion that keeps his form during rolling or a particle that is rolled out like steel ?**__ The inclusion that is worse is a particle that is rolled out like steeel.

=Chapter 4: Can making & recycling=

__**- How many coils of 10 tons can the plant process in a year ?**__ Makes 100000 cans a hour. 1 hour = 100.000 x 0.025 kilograms: 0.75 (75%) = 3333.33 kg 1 year = 3333.33: 1000 x 24 hours x 365 days x 0.9 = 26280 tons 10 coils = 26280 tonnes :10 = 2628 coils

__**- How many cans are produced per year ?**__ 100.000x 24 hours x 365 days x 0.9 = 788.4 million cans are produced a year.

__**- How many square meters storage are required to store a week production ?**__ 100.000x24x7x 0.9 (90%) = 16.8 million cans a week 16.800.000 x 0.125 : 4m high x 0.075 x 0.075 = 2953.125 m2 space per can

__**- How and where are cans recycled ?**__ The cans are compacted into dense briquettes or bales. The masses can range anywhere from thirty to twelve hundred pounds. They are melted into new cans at aliminium plants.