Open AccessMINERAL COMPOSITION OF DUMP BLAST FURNACE SLAG
Author(s) -
Э. Б. Хоботова,
М. И. Игнатенко,
О. Г. Сторчак,
Ю. С. Калюжная,
И. В. Грайворонская
Publication year - 2019
Publication title -
izvestiâ vysših učebnyh zavedenij. černaâ metallurgiâ
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.3
H-Index - 7
eISSN - 2410-2091
pISSN - 0368-0797
DOI - 10.17073/0368-0797-2019-10-774-781
Subject(s) - ground granulated blast furnace slag , slag (welding) , metallurgy , materials science , portland cement , cement , sorption , mineral , mineralogy , geology , chemistry , adsorption , organic chemistry
Industrial wastes, accumulating in a dumping ground, have useful technical properties in many cases, so they can be considered as secon dary resources. The investigation of slag properties and modifications in different conditions needs a complex approach that includes X-ray phase, electron microscopic and petrographic analyses. The research aim is to substantiate the resource value of Zaporozhstal PJSC dump blast furnace slag on the basis of chosen experimental methods. X-ray phase analysis allows us to discover the minerals of blast furnace slag that are crystalline: rankinite 3CaO·2SiO2 , quartz SiO2 , helenite 2CaO·Al2O3·SiO2 , bredigite α-2CaO∙SiO2 , okermanite 2CaO·MgO·2SiO2 and pseudowollastonite α-CaO·SiO2 . The minerals okermanite, bredigite and pseudowollastonite are technically useful to produce binders as they are hydraulically active. The mass fraction of a vitreous component, which composes half of blast furnace slag mass of Zaporozhstal PJSC, was computed. Amorphous phases testify on the higher sorption and chemical slag activation that are important in terms of the use of slag to produce binders. The mass contribution of amorphous substance state is slightly higher in large fraction slag. Microphotographs of the surfaces of blast furnace slag particles show high loosening degree and needle-shaped and lamellar crystallines that stipulate sorption properties of the slag. The dump blast furnace slag of Zaporozhstal PJSC can be recommended to produce binders – Portland cement and Portland slag cement – at totality of chemical parameters: high concentration of hydraulically active minerals and amorphous phase, highly developed surface of slag particles and surface sorption activation.