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Kryvyy Rih, Ukraine

Pikilnyak A.,Kryvyi Rih National University
Metallurgical and Mining Industry | Year: 2015

A method for the effective control of the pulp gas phase composition in the flotation process using dynamic effects of high energy ultrasound and nature experiments on laboratory installation using high-speed video recording with data feedback via function programmed in Matlab for gas bubble size parameters monitoring and control are described. Source


Hryshchenko S.,Kryvyi Rih National University
Metallurgical and Mining Industry | Year: 2014

The article reveals the model of usage of geoinformation technologies during formation of environmental competence of future mining engineers. © Metallurgical and Mining Industry, 2014. Source


Marynych I.A.,Kryvyi Rih National University
Metallurgical and Mining Industry | Year: 2014

Rational application of intelligent systems of control based on the neuro-fuzzy operation technologies and artificial brain is given. © Metallurgical and Mining Industry, 2014. Source


Tarasyutin V.M.,Kryvyi Rih National University
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu | Year: 2015

Purpose: To determine the parameters and regularities of geotechnical properties of high quality martite ores from deep horizons of mines of Kryvyi Rih basin that can provide calculation of ore production by borehole hydraulic technologies, as well as selection and delineation of representative areas in massifs of iron ore in the deposits. Methodology: Laboratory-based determination and theoretical generalization of the parameters of structural and mineralogical characteristics and ore-processing properties of rich martite ores. Findings: Within the developed productive horizons of Kryvyi Rih deposits, there are significant reserves of highquality martite ore with iron content of 65-69%, which was formed as a result of leaching and occurs in accordance with the laws of the mineralogical zoning. Structural and morphological and chemical-mineralogical analysis of samples of high quality martite ores showed that structurally the ores are fine-grained, highly porous, mostly twocomponent system consisting in volume by 90-95% of martita and 5-10% of quartz, which allows us to consider reserves of such ores as a promising source of raw materials for the production of iron ore concentrates of the highest quality. We have found that when the content of iron in the martite ore samples varies between 66.6 to 68.8% (mean 67.9%), the silica content ranges from 1.0 to 2.0% (mean 1.45%), density varies from 3.50 to 3.99 ·103 kg/m3 (mean 3.68 ·103 kg/m3), porosity ranges from 20 to 38% (mean 30%) and uniaxial tensile strength of compression varies from 0.8 up to 10 MPa (mean 4.6 MPa). We have developed the classification of geotechnical types of rich martite ores from Kryvyi Rih basin suitable for the development by borehole hydrotechnologies. Originality: The parameters of geotechnical properties of high quality martite ore take into account the conditions of deep horizons of iron ore mines. We have found that the tensile strength of the uniaxial compression of the ores formed under different conditions reduces by an exponential dependence on their porosity. Practical value: The laws of geotechnical parameters and properties of the rich martite ores allow us to define the basic parameters and range of application of borehole hydrotechnologies. Source


Morkun V.,Kryvyi Rih National University | Morkun N.,National University of Management | Pikilnyak A.,Kryvyi Rih National University
Metallurgical and Mining Industry | Year: 2014

A method for the effective control of the pulp gas phase composition in the flotation process using dynamic effects of high energy ultrasound on the base of phased array technology and determination of its parameters are described. © Metallurgical and Mining Industry, 2014. Source

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