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Titre du document / Document title

Application of waste plastics to electric furnaces for steel making as thermal and carbon sources

Auteur(s) / Author(s)

NARUSE I. (1) ; KAMESHIMA T. (1) ; OMORI H. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Ecological Engineering, Toyohashi University of Technology, JAPON
(2) R&D Division, Daido Steel Co., Ltd, JAPON

Résumé / Abstract

This study develops technology of effective utilization of the waste plastics instead of some parts of coke supplied in electric furnaces for steel making. In order to perform this technology for practical electric furnaces, it is necessary to solve such problems as difficulty of thermal supply to the molten iron and increase of thermal load in the downstream of the furnace due to high reactivity with the plastics. From these viewpoints, first, reaction rates of several types of plastics were measured under the pyrolysis and combustion conditions. Next, the methods to decrease the reaction rate of the plastics were experimentally studied, changing such parameters as size of the plastic pellet, mixing fraction of waste iron material in the pellet, the reaction atmosphere and the furnace temperature. Additionally, compositions of the pyrolized gases and total amounts of both soot and tar produced were analyzed. The results show that both the pyrolysis and combustion characteristics depend on the types of plastics, the pellet size and the mixing fraction of the waste iron in the pellet. The area index proposed in this study can estimate the reaction rate of the practical size of pellet used in the electric furnace. The gases produced from the waste plastics can be utilized as the thermal sources, while both the soot and char produced may contribute to the carbon source in the molten iron.

Source / Source

Congrès
Waste management in Japan :   ( Rhodes, Greece, 29 September - 1 October 2004 )
International Conference on Waste Management and the Environment No2, Rhodes , GRECE (29/09/2004)
2004  , pp. 145-154[Note(s) :  [173 p.]] [Document : 10 p.] (2 ref.), [Notes: "This book contains the contributions presented in special session "Advanced Waste Treatment and Management in Japan" at the 2nd International Conference on Waste Management and the Environment, held in Rhodes, Greece, from 29 September - 1 October 2004"--Pref] ISBN 1-8456-4000-4 ;  Illustration : Illustration ;

Langue / Language

Anglais

Editeur / Publisher

WIT Press, Southampton, ROYAUME-UNI  (2004) (Monographie)

Mots-clés anglais / English Keywords

Upgrading

;

Carbon balance

;

Chemical reaction kinetics

;

Thermal degradation

;

Combustion

;

Plastic waste

;

Waste reuse

;

Electric oven

;

Steel manufacture

;

Steelmaking plant

;

Metallurgical industry

;

Mots-clés français / French Keywords

Valorisation

;

Bilan carboné

;

Cinétique chimique

;

Dégradation thermique

;

Combustion

;

Déchet plastique

;

Réutilisation déchet

;

Four électrique

;

Fabrication acier

;

Aciérie

;

Industrie métallurgique

;

Mots-clés espagnols / Spanish Keywords

Valorización

;

Balance de carbono

;

Cinética química

;

Degradación térmica

;

Combustión

;

Residuo plástico

;

Reutilización desperdicios

;

Horno eléctrico

;

Acería

;

Industria metalúrgica

;

Localisation / Location

INIST-CNRS, Cote INIST : Y 38755, 35400013872768.0160

Nº notice refdoc (ud4) : 17670778



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