Open AccessAnalysis of pellets mineral composition using the solutions trees and k-means methods
Author(s) -
И. С. Берсенев,
А. Н. Старостин
Publication year - 2019
Publication title -
černaâ metallurgiâ. bûlletenʹ naučno-tehničeskoj i èkonomičeskoj informacii/černaâ metallurgiâ. bûlletenʹ naučno-tehničeskoj informacii
Language(s) - English
Resource type - Journals
eISSN - 2619-0753
pISSN - 0135-5910
DOI - 10.32339/0135-5910-2019-7-796-802
Subject(s) - pellets , microstructure , materials science , magnetite , metallurgy , chemical composition , amorphous solid , mineralogy , chemical engineering , chemistry , composite material , crystallography , organic chemistry , engineering
Metallurgical properties of pellets to a great extent depend on the peculiarities of their microstructure. Therefore, understanding of the regularity of its evolution in the process of the pellets burning and elaboration on this base optimal methods of technological process control is a rather actual task. Analysis of experiment data of iron ore pellets microstructure accomplished using the methods of solutions trees and cluster analysis. The pellets were produced of ferrous quartzite concentrates. As the base for the investigation results of study of seven samples of iron ore pellets used, made of regular Mikhajlovsky deposit magnetite concentrate (8.3 % SiO 2 ; 65.4 % Fe) with various basicity and MgO content. Processing of the data made in the Orange Canvas media. Classification of phase composition presented by application of decision tree concept. It was shown, that for the pellets glassy binding, an increased content of Na 2 O and relatively low content of FeO is typical, since the glass phase is formed basing on fusible silicates of waste rock with a high content of alkalis. Sodium and potassium are concentrated in the amorphous (vitreous) phase with a high silicon content. Increasing the MgO content leads to the appearance of a crystalline phase with a decrease in the concentration of alkalis. The decrease of the concentration of alkalis in this case linked with the general increase of the melt due to the pellets fluxing. The pellets fluxing also contributes to the change of composition of iron-bearing phases: with increasing amount of MgO in the pellets, the natural average content of MgO increases in iron-bearing minerals, crystallizing from the melt. CaO is accumulated by silicate components of the pellet structure.