The thermodynamics and kinetics module is part of the ferrous metallurgy course. This module explores the thermodynamics and kinetics behind the removal of carbon, oxygen, sulfur, hydrogen, nitrogen and phosphorus from steel, which are essential to the production of steels tailored to the demands of the consumer or specific applications.
Deoxidation
Full Code
MET0101210
Module Type
E-learning
Description
A solid understanding of thermodynamics and kinetics is fundamental to the chemistry of iron making and steelmaking.
In order to meet varied, and often stringent, consumer demands, it is necessary to understand how chemical composition can be accurately controlled. The removal of oxygen, carbon, phosphorus, sulphur, hydrogen and nitrogen is an essential part of the secondary steelmaking process. In this section the dissolved oxygen removal will be treated. Liquid steels contain dissolved oxygen after their conversion from molten iron, but the solubility of oxygen in steel decreases with cooling. As steel cools, excess oxygen can cause blowholes or precipitate FeO. The final steel quality depends on the oxygen level introduced.
What you will learn
- Explain the concept of deoxidation; the alumina modification / Ca treatment; and deoxidation by Mn and Si;
- Identify the sources of oxygen;
- Interpret the Ellingham diagram and formulate the deoxidation reactions;
- Analyse the effectiveness of deoxidisers, and the effect of inclusions in steel cleanliness.
Module content
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