Daniela Grigorova

@uctm.edu

Faculty of Metallurgy and Materials Science
University of Chemical Technology and Metallurgy

Daniela Grigorova


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https://researchid.co/dgrigorova

EDUCATION

University of Chemical Technology and Metallurgy

RESEARCH INTERESTS

metallurgy, thermodynamics, kinetics, recycling, agglomeration, sintering, briquetting, steelmaking, properties of the metals,
high temperature processes & heat treatment technology
12

Scopus Publications

22

Scholar Citations

2

Scholar h-index

Scopus Publications

  • INVESTIGATION OF THE MECHANICAL PROPERTIES OF TOOL STEEL 45WCrV7 AFTER RADIAL-SHEAR ROLLING
    Rozina Yordanova, Sergey Lezhnev, Evgeniy Panin, Svetla Yankova, Iliyan Ognyanov, et al.
    Journal of Chemical Technology and Metallurgy, 2026
    The work is devoted to the study of the mechanical properties of low carbon tool steel 45WGrV7 after its volume-modification by application of an intensive plastic deformation process. Radial-shear rolling is a proven method of intensive plastic deformation in engineering practice, which produces quality long products with improved structure and properties.In the present work, rods with different final diameters, obtained by radial-shear rolling were investigated by carrying out three different degrees of relative deformation along the diameter of the rots - 30, 50 and 60%. On the basis of tensile and hardness tests, the influence of radial-shear rolling on the mechanical properties of the investigated steel - hardness, tensile strength, conditional yield strength and elongation after failure - was established. The comparative analysis shows that the strength properties after rolling increase by more than 2 times compared to those of the original steel, approaching the properties of expensive high-alloy, high-carbon steels. The findings are a prerequisite for continuing research in order to study and improve the operational properties of the studied steel.
  • FERROSILICON PRODUCTION METHOD USING SINTERED IRON SILICATE-FAYALITE
    Metalurgija, 2023
  • THERMODYNAMIC STUDY OF SOLID-PHASE REDUCTION OF POLYGRADIENT IRON-CONTAINING MATERIAL
    Journal of Chemical Technology and Metallurgy, 2022
  • Thermodynamic and kinetic investigation of carbothermic reduction of electric arc furnace dust
    Metalurgija, 2022
  • THERMODYNAMIC AND KINETIC INVESTIGATION OF IRON SILICATE REDUCTION WITH DIFFERENT REDUCING AGENTS
    Journal of Chemical Technology and Metallurgy, 2022
  • Thermodynamic activities of V2 O3, mno, and feo in quaternary system V2 O3-FEO-SIO2 – MNO
    Metalurgija, 2020
  • Kinetics of reduction of waste fayalite by calcium carbide
    Journal of Chemical Technology and Metallurgy, 2019
  • Activity investigation of FeO, SiO2 and V2O5 in V2O5- FeO - SiO2ternary systems
    Journal of Chemical Technology and Metallurgy, 2017
  • Thermodynamic investigation of briquette obtained from waste fayalite with calcium carbide
    Journal of Chemical Technology and Metallurgy, 2017
  • Electric-arc-carbothermic processing of agglomerated waste dispersal materials from ferrous metallurgy
    Journal of Chemical Technology and Metallurgy, 2014
  • Utilization of waste powder and sludge in iron ore sintering process
    Journal of Chemical Technology and Metallurgy, 2014
  • Modified waste dispersion phase from the extraction metallurgy as functional filler for rubber-based materials
    N. Dishovsky, D. Grigorova, VI. Iliev, S. Borros
    Journal of Elastomers and Plastics, 2010

RECENT SCHOLAR PUBLICATIONS

  • INVESTIGATION OF THE MECHANICAL PROPERTIES OF TOOL STEEL 45WCrV7 AFTER RADIAL-SHEAR ROLLING
    R Yordanova, S Lezhnev, E Panin, S Yankova, I Ognyanov, D Grigorova
    Journal of Chemical Technology and Metallurgy 61 (2), 341-350 , 2026
    2026
  • APLLICATION OF NANOMATERIALS IN WATER TREATMENT FROM MANGANESE
    A Grigorov1a, S Lavrova1b, D Grigorova1c
    2025
  • Thermodynamic investigation of carbothermic reduction of electric arc furnace dust
    A Iliev1a, D Grigorova1b
    2025
  • Investigation of the Composition and Structure of Waelz Slag
    A Iliev, N Gogov, D Grigorova, G Hodjaoglu
    SEPRM 6, 25-28 , 2025
    2025
    Citations: 1
  • Ferrosilicon production method using sintered iron silicate-fayalite
    D Grigorova
    Metalurgija 62 (1), 15-18 , 2023
    2023
    Citations: 2
  • THERMODYNAMIC AND KINETIC INVESTIGATION OF IRON SILICATE REDUCTION WITH DIFFERENT REDUCING AGENTS.
    D Grigorova, R Paunova
    Journal of Chemical Technology & Metallurgy 57 (4) , 2022
    2022
  • Thermodynamic and kinetic investigation of carbothermic reduction of electric arc furnace dust
    D Grigorova, R Paunova
    Metalurgija 61 (1), 189-192 , 2022
    2022
    Citations: 4
  • Strength and Мicrowave Testing of Vulcanizates Containing Modified Nanofillers
    D Grigorova
    International Journal “NDT Days” 5 (3), 175-180 , 2022
    2022
  • Experimental Study of Butt-Welded Joint of High Strength Steel
    DG Pavlin SHARBANSKI
    International Journal “NDT Days” 5 (1), 42-47 , 2022
    2022
  • THERMODYNAMIC STUDY OF SOLID-PHASE REDUCTION OF POLYGRADIENT IRON-CONTAINING MATERIAL
    RP Daniela Grigorova
    Journal of Chemical Technology and Metallurgy 57 (3), 637-644 , 2022
    2022
    Citations: 1
  • Ferrosilicon Obtaining Using Iron-Silicate –Fayalite
    D Grigorova
    The 52nd International October Conference on Mining and Metallurgy 1 (1 … , 2021
    2021
  • Kinetic Study оf Solid-Phase Reduction оf Polygradient Iron-Containing Material
    RP Daniela Grigorova
    The 52nd International October Conference on Mining and Metallurgy, 19-22 , 2021
    2021
  • Thermodynamic activities of V 2 O 3 , MnO, and FeO In quaternary system V 2 O 3 - FeO - SiO 2 – MnO
    D Grigorova, R Paunova
    Metalurgija 59 (1), 23-26 , 2020
    2020
    Citations: 1
  • KINETICS OF REDUCTION OF WASTE FAYALITE BY CALCIUM CARBIDE
    D Grigorova, R Paunova
    Journal of Chemical Technology and Metallurgy 54 (6), 1256-1262 , 2019
    2019
    Citations: 1
  • Kinetic Investigation of the System Fe2O3-MnO-V2O5-SiO2, Using Waste Material
    RP Daniela Grigorova
    International Research Journal of Engineering and Technology 5 (10), 1623-1626 , 2018
    2018
  • Thermodynamic Investigation Of Briquette Obtained From Waste Fayalite With Calcium Carbide
    D Grigorova, D Stoyanov, R Paunova
    Journal of Chemical Technology and Metallurgy 52 (2), 362-368 , 2017
    2017
    Citations: 3
  • ACTIVITY INVESTIGATION OF FeO, SiO2 AND V2O5 IN V2O5-FeO-SiO2TERNARY SYSTEMS
    D Grigorova, R Paunova
    Journal of Chemical Technology and Metallurgy 52 (2), 213-220 , 2017
    2017
    Citations: 1
  • Phase Transformations and Thermodynamics in the System Fe2О3–V2О5–MnО–SiО2 of Non-Isothermal Heating
    R Paunova, D Grigorova, R Alexandrova
    2015
    Citations: 1
  • Utilization of waste powder and sludge in iron ore sintering process
    D Grigorova, T Tsanev, M Marinov
    Journal of Chemical Technology and Metallurgy 49 (6), 615-620 , 2014
    2014
    Citations: 2
  • ELECTRIC-ARC-CARBOTHERMIC PROCESSING OF AGGLOMERATED WASTE DISPERSAL MATERIALS FROM FERROUS METALLURGY
    D Grigorova, M Marinov, R Paunova
    Journal of Chemical Technology and Metallurgy 49 (6), 610-614 , 2014
    2014

MOST CITED SCHOLAR PUBLICATIONS

  • Thermodynamic and kinetic investigation of carbothermic reduction of electric arc furnace dust
    D Grigorova, R Paunova
    Metalurgija 61 (1), 189-192 , 2022
    2022
    Citations: 4
  • Thermodynamic Investigation Of Briquette Obtained From Waste Fayalite With Calcium Carbide
    D Grigorova, D Stoyanov, R Paunova
    Journal of Chemical Technology and Metallurgy 52 (2), 362-368 , 2017
    2017
    Citations: 3
  • Ferrosilicon production method using sintered iron silicate-fayalite
    D Grigorova
    Metalurgija 62 (1), 15-18 , 2023
    2023
    Citations: 2
  • Utilization of waste powder and sludge in iron ore sintering process
    D Grigorova, T Tsanev, M Marinov
    Journal of Chemical Technology and Metallurgy 49 (6), 615-620 , 2014
    2014
    Citations: 2
  • Modified waste dispersion phase from the extraction metallurgy as functional filler for rubber-based materials
    N Dishovsky, D Grigorova, VI Iliev, S Borros
    Journal of Elastomers & Plastics 42 (3), 241-253 , 2010
    2010
    Citations: 2
  • Effect of Waste Dispersion Phases from the Extraction Metallurgy on the Rheological, Electrical and Microwave Properties of Nitrile Butadiene Rubber Based Composites
    D Grigorova, N Dishovsky, V Iliev
    Journal of the University of Chemical Technology and Metallurgy 42 (4), 355-358 , 2007
    2007
    Citations: 2
  • Investigation of the Composition and Structure of Waelz Slag
    A Iliev, N Gogov, D Grigorova, G Hodjaoglu
    SEPRM 6, 25-28 , 2025
    2025
    Citations: 1
  • THERMODYNAMIC STUDY OF SOLID-PHASE REDUCTION OF POLYGRADIENT IRON-CONTAINING MATERIAL
    RP Daniela Grigorova
    Journal of Chemical Technology and Metallurgy 57 (3), 637-644 , 2022
    2022
    Citations: 1
  • Thermodynamic activities of V 2 O 3 , MnO, and FeO In quaternary system V 2 O 3 - FeO - SiO 2 – MnO
    D Grigorova, R Paunova
    Metalurgija 59 (1), 23-26 , 2020
    2020
    Citations: 1
  • KINETICS OF REDUCTION OF WASTE FAYALITE BY CALCIUM CARBIDE
    D Grigorova, R Paunova
    Journal of Chemical Technology and Metallurgy 54 (6), 1256-1262 , 2019
    2019
    Citations: 1
  • ACTIVITY INVESTIGATION OF FeO, SiO2 AND V2O5 IN V2O5-FeO-SiO2TERNARY SYSTEMS
    D Grigorova, R Paunova
    Journal of Chemical Technology and Metallurgy 52 (2), 213-220 , 2017
    2017
    Citations: 1
  • Phase Transformations and Thermodynamics in the System Fe2О3–V2О5–MnО–SiО2 of Non-Isothermal Heating
    R Paunova, D Grigorova, R Alexandrova
    2015
    Citations: 1
  • Plasma-induction technology for reduction processing of copper concentrate pellets
    M Mihovsky, V Hadzhiyski, L Todorov, D Dimitrova
    Journal of the University of Chemical Technology and Metallurgy 41 (1), 55-60 , 2006
    2006
    Citations: 1
  • INVESTIGATION OF THE MECHANICAL PROPERTIES OF TOOL STEEL 45WCrV7 AFTER RADIAL-SHEAR ROLLING
    R Yordanova, S Lezhnev, E Panin, S Yankova, I Ognyanov, D Grigorova
    Journal of Chemical Technology and Metallurgy 61 (2), 341-350 , 2026
    2026
  • APLLICATION OF NANOMATERIALS IN WATER TREATMENT FROM MANGANESE
    A Grigorov1a, S Lavrova1b, D Grigorova1c
    2025
  • Thermodynamic investigation of carbothermic reduction of electric arc furnace dust
    A Iliev1a, D Grigorova1b
    2025
  • THERMODYNAMIC AND KINETIC INVESTIGATION OF IRON SILICATE REDUCTION WITH DIFFERENT REDUCING AGENTS.
    D Grigorova, R Paunova
    Journal of Chemical Technology & Metallurgy 57 (4) , 2022
    2022
  • Strength and Мicrowave Testing of Vulcanizates Containing Modified Nanofillers
    D Grigorova
    International Journal “NDT Days” 5 (3), 175-180 , 2022
    2022
  • Experimental Study of Butt-Welded Joint of High Strength Steel
    DG Pavlin SHARBANSKI
    International Journal “NDT Days” 5 (1), 42-47 , 2022
    2022
  • Ferrosilicon Obtaining Using Iron-Silicate –Fayalite
    D Grigorova
    The 52nd International October Conference on Mining and Metallurgy 1 (1 … , 2021
    2021