Bentonite of Khakassia Ltd. (Chernogorsk, Russia)¹ ; Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences (ICEMR RAS), (Moscow, Russia)²

D. A. Vetyugov, Mineral Processing Technologist¹, Postgraduate Student², e-mail: vetug7@gmail.com

Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences (ICEMR RAS), (Moscow,
Russia)

T. N. Matveeva, Dr. Eng., Head of Dept., e-mail: tmatveyeva@mail.ru

The results of the experimental studies of metallurgical properties of iron ore pellets obtained using bentopolymer binders are presented in this article. Agglomeration of iron ore concentrate is a necessary operation to ensure the required permeability of the charge column and the strength of the material during its processing in a shaft furnace. Among the requirements for the quality indicators of pellets in terms of chemical properties, the key ones are the maximal iron content and the minimal silicon dioxide content. Optimization of their composition and structure is one of the important aspects of improving the quality of pellets. Development of new binders and roasting technologies allows creating pellets with improved characteristics, which contributes to increasing the efficiency of the blast furnace process and reducing pollutant emissions. In this work, the bentopolymer composition BPC-1A was used as a binder, the main component of which is high-quality natural sodium bentonite from the Dash-Salakhli deposit (Republic of Azerbaijan), the polymer part is represented by polyacrylamide. The studies were performed on four samples of roasted pellets with a binder consumption of 6–8 kg/t. The optimal granulometric composition of the pellets (the yield of –12+10 mm class was 75.6 % against the basic 69.8 %) was obtained while using the BPC-1A binder in the amount 7 kg/t. The highest value of the hot strength index according to ISO 13930-2015 was 97.16 % also at a dosage of 7 kg/t. Based on the totality of the obtained results of laboratory studies, the bentopolymer composition BPC-1A at a dosage of 7 kg/t of pellets can be recommended for pilot testing at Stoilensky mining and concentrating plant.

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