OXYGEN CONVERTER

2008013433PYO SUN JIN

POSCO E&C

Caution

※ I couldn’t find many information about oxygen converter.

※ So this presentation is real 40%, my thinking 60%.

※ Don’t trust absolutely this contents.

1. What is the oxygen converter?

Oxygen converter ?

By blowing pure oxygen gas Oxygen converter change pig iron to steel.

When blowing oxygen gas, The carbon, Impurities are removed by oxidation.

2. MaterialOxygen converter

◎ External

Steel - external maintenance.

◎ Internal part

Ceramic – endure high temperature.

Melting temperature : Ceramic>Steel

(Refractory – high temperature material.)

3. External Design

- Appearance

- Capacity

4. External Process

Sand casting is a metal casting process.By using sand as the mold material.

5. Internal Part - Refractory

◎ Refractory

Refractory is high temperature material.

Not deformed at the melting temperature of steel.

Generally melting temperature of refractory is more than 1,580℃.

6. Refractory manufacturing.1. Crushing

2. Mixing

Crushing can make raw materials easier to shape.

Ground raw material is weighed and mixed.

→

The mixture is poured into a mold to form shapes, and the pressure is high.

3. shaping

6. Refractory manufacturing.

4. Drying

5. Firing6. Packing/Shipping

http://www.chosunref.co.kr/home/eng/product/process.asp

Water is removed from the shaped bricks. This helps preventing the bricks from deforming or cracking

The modeled bricks are fired at high temperature to complete their thermochemical reaction.This is the most important process.

7. Bonding

+ =

Thank you