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Preparation of raw materials
Название Microstructure and mineralogical composition of agglomerates in use of additives of brown ironstone ores, bentonite clays and serpentinite-magnesites
Автор D. R. Ganin, V. G. Druzhkov, A. A. Panychev, I. S. Bersenev
Информация об авторе

Novotroitsk branch of the National University of Science and Technology “MISIS” (Novotroitsk, Russia):

D. R. Ganin, Engineer, e-mail: dmrgan@mail.ru
A. A. Panychev, Cand. Eng., Associate Prof., Dept. of Metallurgical Technology and Foundry Processes

 

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia):
V. G. Druzhkov, Cand. Eng., Associate Prof., Dept. of Metallurgical Technology and Equipment

 

“TOREKS” Scientific and Production Corporation (Ekaterinburg, Russia):
I. S. Bersenev, Cand. Eng., Head of Agglomeration Equipment & Technology Group

Реферат

Currently, a significant increase in technical and economic indicators of agglomerate production can be achieved in the conditions of JSC «Ural Steel» only by modernizing the equipment of the sintering shop. However, the use of mineral additives in the agglomeration charge supplied in the pulp during pelletization can be considered as an effective and relatively easy way to improve the quality of the agglomerate. In this paper we present the results of a study of the mineralogical composition of agglomerates obtained with the use of additives from brown ironstone ores of the Novokievsky deposit, clays of the Voskresenskoye deposit, serpentinitomagnesite of the Khalilovskoye field. A mechanism for improving the quality of the agglomerate was clarified on this basis. Iron ore agglomerates, obtained in a «sintering bowl» type installation, were used as the research objects. Scanning electron microscopy was used to determine the chemical composition of minerals, and the minerals themselves were classified into ore minerals, ferrocalciumolivines, high-iron minerals, calcium silicates, dicalcium silicate, and others. Analysis of the obtained data showed that the reasons for improving the quality of the agglomerate of JSC «Ural Steel» with the use of additives of brown ironstone ores, bentonite clays and serpentinitomagnesites are an increase in the temperature and heat level of the sintering process and the formation of a silicate binder with impurities preventing the formation of dicalcium silicate and softening of the sinter at its polymorphic transformation during cooling. The realization of additives contributed to the improvement in the granulometric composition of the agglomeration charge, which led to an intensification of the combustion process of fuel and increased heat transfer.

Ключевые слова Sintering mix, mineral additions, fine pulp, brown ironstone, bentonite, serpentinite-magnesite, quality
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