Chapter+3+-+Continous+casting

**1. How long does it take for steel to pass the section?** The steel takes 60 seconds to pass through the section because the section that the steel is poured into is 6m long and the liquid steel flows at a speed of 0.1m/s you only need to work out 6m/0.1m/s=60m/s. **1. What is the minimum rising velocity for an inclusion entering at the bottom required to reach the surface within the section?** The minimum rising velocity for an inclusion (a non-metallic particle) to reach the surface is 1.3cm/s because if the height of the section is 0.78cm divide this by the 60 seconds = 1.3cm/s. So if an inclusion was at the bottom it would have to take 1.3cm/s or more.
 * __Chapter 3__**

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