The External Desulphurisation of Hot Metal.

Abstract

This thesis is based on works trials and laboratory model
studies.

Iron samples taken on the works showed that a sample from the
torpedo gave an adequate estimate of the iron sulphur level.

The mixing characteristics of iron during the calcium carbide
based torpedo injection process were examined using a model. The
modelling criterion was that the energy input per unit mass of
liquid should be the same for the model and the plant. The mixing
time was primarily dependent on the lance immersion depth and the
rate at which the gas evolving agent was introduced to the iron.
The effect on the process of torpedo internal skulls was demonstrated.
The results of this model work were confirmed by plant data, and
were used in making adjustments to the operation of the plant.

A torpedo model was used to study the effects of its mouth
shape on desulphurisation slag removal. The most significant factor
was the metal pouring rate but the mouth shape determined the ease
of removing the large lumps of slag which occur.

Date of Award	Dec 1980
Original language	English
Awarding Institution	Aston University