EXPERIMENTAL METHODS FOR STUDYING THE RESOURCE VALUE OF DUMP BLAST FURNACE SLAGS

The study of the properties blast-furnace slags requires an integrated approach, including various research methods. purpose work is to substantiate resource value Zaporizhstal dump blast furnace slag. methods were used: X-ray phase, petrographic, gamma-spectrometric analysis and electron probe microanalysis. slag dispersed into fractions, since minerals have different hardness. Fractions (mm) investigated in work: >20 2.5–5, <0.63. phase made it possible reveal crystalline part that are technically valuable production binders: 3CaO∙2SiO2, SiO2, 2CaO∙Al2O3∙SiO2, α-2CaO∙SiO2, 2CaO∙MgO∙2SiO2, α-CaO∙SiO2. Minerals akermanite, bredigite, pseudo-wollastonite hydraulic activity. It shown mass fraction amorphous component half high content substances state confirms possibility sorption extraneous ions compounds. found elements Potassium, Sodium, Sulfur, Chlorine, Cuprum Titanium not minerals. Slag contains less than 1% total amount Fe, Ti Cu, belonging 3rd class hazardous substances. maximum Sodium typical for 2.5–5 mm. most basic <0.63 mm (pH 9.7), pH 9.1, acidic 8.2). By toxicity index (4.3–5.4) III hazard class, «Zaporizhstal» as a moderately waste can be used secondary raw material construction industry. database on natural radionuclides technogenic materials has been updated. proven its individual fractions contain 40К, 226Ra, 232Th. main contribution Сef by 226Ra radionuclide, then excess specific activity expressed fraction. I radiation defined, which allows use without restrictions. Dump «Zaporizhstal recommended inorganic binders « totality chemical indicators.