C3T+group3

We're group 3 of C3T of the Werenfridus! Rens, Pauline, Joy, Mike, Annemieke and Annelies are in our group. We love doing this project! But please do not copy our answers without asking us for permission. FROM COKE TO COKE:**
 * Hi everybody,




 * These are the questions that we've already made.**

//**Page 10**// In a horizontal section with a length of 6 meters liquid steel flows at a speed of 0.1 m/s. The height from surface to bottom is 0.78 cm.

//1. How long does it take for steel to pass the section?// Time = 6 divided by 0.1 is 60 seconds.
 * Questions & Answers page 10.**

//2. What is the minimum rising velocity for an inclusion entering at the bottom required to reach the surface within the section?// Minimum rising velocity = 78 divided by 60 = 1.3 cm/s

//3. For which particle sizes given in the table, all particles will reach the surface within the section?// Particles bigger than or equal to 0.2 will all reach the surface.

Casting two strands of 225 mm thick and 1300 mm wide at 1.5 m/min.
 * //Page 11//**

//1. How many tons of slabs are produced per minute//? Thickness 225 mm 22.5 cm 0.225 m wideness = 1300 mm = 1.3 m speed = 1.5m/min. 0.225x1.3=0.2925 0.2925x1.5=0.43875m³ 0.43875x7000=3071.25 kg 3.07125 tons x2 (strands) 6.1425 tons
 * Questions & Answers page 11.**

//2. How many tons a year can be produced when operating 90% of the year?// 365days x 24hours per day x 60minutes = 525600 minutes a year 6.1425x525600= 3228498 3228498x0.9=2905648.2 ( = 2.9 Million tons)

//3. Why is casting so critical for the cleanliness of the steel// The cleanliness is very important for the steel because if there is too much waste in it, it will not be strong enough.

//4. 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 rolled out like steel is worse because that weakens the steel and it is not strong enough Describe the process steps from steel slab to tinned coil. A slab for beverage cans is cast at 1300 mm wide, 225 mm thick and 10.8 meters long. It is hot rolled to 2.5 mm with a yield of 98% (head and tail are cut off)
 * Page 12**

//1. What is the length of the hot rolled coil? After pickling the hot rolled coil is cold rolled to o.22 mm thickness.// HR-length = 10.8 x 225 : 2.5 x 0.98 = 952.56 m
 * Questions & Answers page 12.**

//2. How long is the colled coil? The wall thickness of a can is approximately a third of the thickness of the metal sheet it is made from. Suppose material fails if an inclusion is a third of the wall thickness.// CR-length = 952.56 x 2.5 : 0.22 = 10824.5 m

//3. What is the maximum inclusion size that is allowed in the material?// Wall thickness = 0.22 : 3 = 0.07333 Maximum inclusion size 0.073333 : 3 = 0.02444 = 24 μm

__Raw materials__: Material that can be converted by manufacture, treatment etc. into a new and useful product. __Blast furnace__: A furnace, especially for converting iron ore into iron, in which combustion is forced by a current of air under pressure. __Refractory__: A heat-resisting ceramic material. __Ladle__: A vessel for carrying molten metal in a foundry. __Converter__: The furnace used in the Bessemer process of steel-making or a device employing mechanical rotation to change electrical energy from one form to another. __Slag__: Waste matter from the smelting of metal ores. __Scrap__: Used steel useful for reprocessing. __Combustion__: The process of burning. __Metallurgy installation__: An installation where a chemical composition is adapted to the required composition and temperature. __Continuous casting__: A refinement of the casting process for the continuous, high-volume production of metal sections with a constant cross-section. __Tundish__: A reservoir in the top part of a mould into which hot metal is poured. __Mould__: A cavity, dish or form in which a substance is shaped. __Inclusion__: A non-metallic particle, a foreign body enclosed in a mass. __Solidify__: To become solid. __Slab of steel__: A large thick flat piece or slice of steel. __Coil of steel__: A length of steel gathered into a series of loops. __Waste separation__: To make a distinction between waste.
 * Glossary:**

These are some pictures of our school; Werenfridus. = =