Objective
The aim of this research project is to:
- analyse the impact of the scrap preheating process in the following field: gaseous emissions produced by the furnace, secondary emissions and their effects on the quality of air in workshops, analysis of the dusts produced by the new process, odour emission, acoustic impact of arc-melting preheated metal charges,
- define ways to ensure optimum effluent control for the new process to ensure environmental protection, improved working conditions and plant safety.
In addition the possibility of upgrading the waste products will be studied.
In recent years, arc furnace steel processing has made great progress and stepped up productivity considerably. This is due in particular to technical advances in the utilization of high power electricity, better control of oxygen-assisted melting techniques (oxygen injection, operation with oxy-fuel burners), cooled furnace walls and the use of secondary metallurgical processes.
This development has not been without impact on emissions of gas and dusts from arc furnaces and, in turn, techniques for effluent control and dedusting. For example, a number of difficulties have been encountered in fume treatment installations, with explosion hazards arising when CO and H2 combustion was poorly controlled and lines and filters deteriorating if fume was not cooled sufficiently. A lot of work has been done in the Community and in particular in France at LECES, and the results have appeared in several publications.
Now, following the example of techniques used widely in Japan, it seemed wise to harness the high heat flow rates in the fume to preheat scrap before charging and several installations of this type are thus being started up or are projected in the European Community. These lead to major changes in furnace operation which are reflected in the pollution and nuisances produced by the equipment.
Topic(s)
Call for proposal
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57212 Maizieres-les-Metz
France