Issue №: 3 (94)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
PREPARATION OF TUFF IN THE DUMPS OF BASALT QUARRIES FOR VIBRATION SCREENING
Nadutyy Vladimir Petrovich - Head of the Department of Mechanics of Machines and Processes of Mineral Processing, Institute of Geotechnical Mechanics named M.S. Poljakov of the National Academy of Sciences of Ukraine, Dnipro city; Doctor of Technical Sciences, Professor 49005, Dnipropetrovsk region, Dnipro city, st. Simferopol, 2a, tel. 0501958382, nadutyvp@gmail.com
Cholishkina Valentina Vasilievna - Senior Researcher, Department of Machine Mechanics and Mineral Processing, Institute of Geotechnical Mechanics named M.S. Polyakov of the National Academy of Sciences of Ukraine, Dnipro city; candidate of technical sciences; 49005, Dnipropetrovsk region, Dnipro city, st. Simferopol, 2a, tel. 0957816233, chel.valenti@gmail.com
Sukharev Vitaliy Vitalievich - Senior Researcher, Department of Machine Mechanics and Mineral Processing, Institute of Geotechnical Mechanics named M.S. Polyakov of the National Academy of Sciences of Ukraine, Dnipro city; candidate of technical sciences; 49005, Dnipropetrovsk region, Dnipro city, st. Simferopol, 2a, tel. 0975016722, agnivik@ukr.net
Malanchuk Zinovy Romanovich - Professor, Department of Field Development and Mining, National University of Water Management and Nature Management of the Ministry of Education and Science of Ukraine, Rivne city; Doctor of Technical Sciences, Professor;33028, Rivne region, Rivne city, st. Cathedral, 11
tel. 0507774231, malanchykzr@ukr.net
The article presents the current development of an integrated technology for the processing of tuff in the dumps of basalt pits to highlight the valuable metal fraction and silicate masses. In order to prepare tuff for processing, it is proposed to use the effect of moisture absorption and reduce the strength of tuff when moistened with water, since it has a porous structure and is relatively easy to absorb moisture. This operation, followed by vibratory screening in a small class of -2.5 + 2.0 mm, is promising for the selective extraction of tuff from dumps of basalt quarries, where, unlike other rocks, tuff is a water-absorbing mineral. The article presents the results of experimental studies and the development of mathematical models of the process of softening tuff with water. The objective of the research was to determine the degree of change in the strength of tuff under the influence of moisture and to establish the dependence of humidity and strength to predict the process of softening of tuff when wet. Experimental studies were carried out on various samples of tuffs of the Rafalovsky basalt quarry, while the exposure time of the sample in water was recorded, humidity, indenter indentation pressure on the press or contact load and compressive strength or contact stress during indenter penetration were determined. It was found that when moistening tuff during the day, humidity increases on average by 9%, strength decreases from 120.5 to 10.6 MPa and is 9.2% of the strength of the feedstock. Humidity of tuff in time increases according to the law of a quadratic parabola with a complex argument, the force of indentation of the indenter from moisture and wetting time changes according to the logarithmic law, strength from humidity and time - according to the law of the quadratic parabola. Also, the article proposes an algorithm for calculating humidity and strength characteristics during wetting during the day. It is advisable to use this technology of softening tuff with water as an ore preparation operation with the integrated technology of tuff processing.
1. Malanchuk, Z. R. (2005). Osnovni fizyko-kximichni ta tekhnolohichni vlastyvosti tufiv Rivnenshchiny [Basic physicochemical and technological properties of tufts of Rivne region]. Heotekhnichna mekhanika : Mizvid. zb. nauk. prats. IHTM NAN Ukrayiny. (59), 106-114. [in Ukrainian].
2. Naduty, V.P. Malanchuk, Z. R. Prokopyuk, O. N. (2010). Obosnovanie neobkhodimosti kompleksnoy pererabotki tseolit-cmektitovykh tufov Volyni [Justification of the need for complex processing of zeolite-smectite tuffs of Volyn]. "Forum gornyakov-2010" : mater. Mezhdunar. konf. 50-55. [in Ukrainian].
3. Burdeniuk, I. P. (2013). Pryrodnyi mineral - bazaltovyi tuf, perspektyvy zastosuvannia v kharchoviy promyslovosti, biolohii ta medytsyni [Natural mineral - basalt tuff, prospects of application in food industry, biology and medicine]. Klinichna ta eksperymentalna patolohiia. XII. (2(44)). 35–41. [in Ukrainian].
4. Nadutyiy, V. P. Yagnyukov, V.F. Yagnyukova I.V. (2016). Rezultaty eksperimentalnykh issledovanii valkovogo vibratsionnogo klassifikatora v zabisimosti оt ego konstruktivnykh parametrov [The results of experimental studies of the roll vibration classifier depending on its design parameters]. Heotekhnichna mekhanika : Mizvid. zb. nauk. prats: IHTM NAN Ukrayiny. (126), 15-25. [in Ukrainian].
5. The official site «Single window of access to information resources» (2019), “Method of determining the strength of rocks», available at: http://window.edu.ru/catalog/pdf2txt/116/71116/48332 [in Russian].
About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
