Organic pollutants in iron ore sintering - consequences for electrostatic filter operation | | Project | Fact sheet | ECSC | CORDIS

Ziel

The project has two aims:

- To characterise the organic substances in the windbox exhaust gases produced in a sintering plant (flows and nature of the substances emitted as a function of sintering plant operating conditions) and identify means of reducing emissions by intervention in the process.
- To establish the causal factors and reduce the risk of electrostatic filter fires by stringent and rational management of the different types of fuel and other elements in the feed materials for sintering which are implicated in the formation of the organic substances that are liable to ignite.

The work will be carried out at an industrial site in conjunction with the process departments of the plants and the Usinor-Sacilor joint research center. Extensive use will be made of specialised analysis laboratories (Cerchar, petrochemicals industry, university laboratory) for specific analyses and to determine the causal factors of electrostatic filter fires.

Emissions of organic substances will be characterised and the electrostatic filter fire risks investigated at an industrial plant.

The conditions in which the organic substances implicated in electrostatic filter fires are formed will be studied on an experimental rig.

Organic substance emission will be characterised on the basis of:

- total hydrocarbon content and its variations in time,
- level of thermal degradation tracer compounds relating to the main fuels used,
- level of micropollutants such as PAH and BTX.

The variable parameters will be the ore, type of fuel (coal, coke breeze and petroleum coke) and the by-products containing organic compounds (scale, greasy sludge).

A protocol for the rapid characterisation of fuels will be developed for this purpose.

Study of fire risks in electrostatic filters.

This will consist in looking at the mechanisms involved in the formation of permanent deposits on the plates and the link between the organic phase of the exhaust gases and the mass of organic compounds in the deposits.

A protocol for the rapid identification of the organic compounds in the dust by extraction in an organic solvent will be used for this purpose.

The pyrophoric character of the deposits will be established using thermal and thermogravimetric methods.

Different types of fuels and by-products will be studied, as above.

Study of organic emissions on an experimental rig.

The objective here will be to carry out a broader study of the mechanisms involved in the formation of the organic substances found in exhaust gases and, in particular, to identify the point in time at which the substances form. This will be undertaken for conventional fuels, a mixture of fuels in specific proportions, and the new resources mentioned above.

These tests will be used as a basis for the preparation of industrial tests, although it will also be useful to investigate the possibility of reducing emissions by the selective treatment of organic emissions, e.g. incineration by localised burner or dry treatment.

The following methods will be used:

- conventional controlled-temperature sampling,
- thermal and thermogravimetric methods,
- analysis by gas-phase chromatography, liquid-phase chromatography, infrared spectrometry and automatic analysis of total hydrocarbons,
- analysis and observation by scanning electron microscopy (SEN) and laser microprobe mass analysis (LAMMA) for studying deposits.

Programm/Programme

ECSC-WORKENV 5C - Fifth research programme (ECSC) "Technical control of nuisances and pollution at the place of work and in the environment of iron and steel works", 1985-1989

Thema/Themen

2 - Measures to combat fresh and sea water pollution

Aufforderung zur Vorschlagseinreichung

Data not available

Finanzierungsplan

Data not available

Koordinator

Laboratoire d'Etude et de Contrôle de l'Environnement Sidérurgique (LECES)

EU-Beitrag

Keine Daten

Adresse

Voie Romaine
57212 Maizieres-les-Metz
Frankreich

Gesamtkosten