Dreshpak A.S. Experimental evaluation of the raw material concentration and classification in nonhomogeneous carbonate deposits

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 139

Geoteh. meh. 2018,139, 89-98

DOI: https://doi.org/10.15407/geotm2018.02.089

EXPERIMENTAL EVALUATION OF THE RAW MATERIAL CONCENTRATION AND CLASSIFICATION IN NONHOMOGENEOUS CARBONATE DEPOSITS

¹Dreshpak A.S.

¹National Technical University «Dnipro Polytechnic»

UDC621.928.2

Language: Russian

Abstract.

Processes of concentration of limestone raw materials from the West-Tyaginsky non-homogeneous carbonate deposit are analyzed. Raw materials are characterized by the presence of main component (limestone) and significant volumes of impurities (clay and sandy additives). Concentration of feedstock is carried out by way of its classification when a part of the limestone with clay additives is directed to the dump. Efficiency of screening significantly depends on the raw material humidity. A new roll-finger screen designed by the author makes it possible to improve screening efficiency under conditions of high humidity and, consequently, to upgrade the raw material concentration. Specificity of methodology for conducting a series of experimental studies of the screening process for raw materials with and without using the roller-finger screen is described. Two factors that have a significant impact on the raw material concentration and screening - content of limestone and raw material humidity - are identified. Experimental studies are designed in such a way that, based on them, it is possible to create regression linear dependencies. It was proposed to stabilize, in the process of performing experiments, levels of other parameters that affect performance indicators of the concentration process. Boundaries were determined for the variable parameters. Results of raw material screening in the considered variants with and without use of the roller-finger screen were compared. It was established that at humidity of 6%, the inertial and roll-finger screens had similar screening efficiency, but when raw material humidity was increased up to 12%, screening efficiency was twice increased in variant with roll-finger screen. With using the roller-finger screen, mass of undersize product is increased by 1.75-2 times. Stability of screening within the considered limits of changes of raw material humidity is improved, and concentration efficiency increases by 10-20%.

Key words: limestone, humidity, concentration, finger screen, roller screen, efficiency of screening.

References:

1. Dreshpak A.S. (2016), «Justification of the initial parameters of the enrichment of limestone from heterogeneous carbonate deposits». Mineral resources enrichment, Vol. 64 (105), pp. 59-68.

2. Dreshpak A.S. (2018), «Features of constructive execution of curly discs of starscreen», Mineral resources enrichment, Vol. 71 (111), pp. 29-38.

3. Spiridonov A.A. (1981), Planirovaniye eksperimenta pri issledovanii tekhnologicheskikh protsessov [Planning an experiment in the study of technological processes], Mechanical engineering, Moscow, RU.

4. Spyrin N.A. and Lavrov V.V. (2004), Metody planirovanniya I obrabotki rezultatov inzhenernogo eksperimenta: Konspekt lektsiy [Methods of planning and processing the results of an engineering experiment: Lecture notes], GOU VPO UGTU, Yekaterinburg, RU.

5. Research and Design Institute for the problems of mining, transportation and processing of mineral raw materials in the building materials industry (1999), B V.2.7-71-98. Shchebin ta graviy iz shchilnykh girskykh porid i vidkhodiv promyslovogo vyrobnytstva dlya budivelnykh robit. Metody fizyko-mekhanichnykh vyprobuvan [B.V.2.7-21-98 Rubble and gravel from dense rocks and waste industrial production for construction works. Methods of physical and mechanical tests], Kyiv, Ukraine.

6. Naduty, V.P., Ostapenko, V.A. and Yagnjukov, V.F. (2006), Sintez parametrov valkovykh klassifikatorov vibratsionnogo tipa: monografiya [Synthesis of parameters rolling classifiers of a vibrating type: monograph], Naukova dumka, Kyiv, Ukraine.

7. Guter Hake Andreas and Muller Thomas (2000), Einsatz von Walzenrostsieben und Rotationsseparatoren zur Klassierung Sieb Schwinge, Aufbereitechn, Vol 7, pp. 330 -335.

About the authors:

Dreshpak Aleksandr Stanislavovich, Doctoral Student of the Department «Technological Engineering of Materials Processing», National Technical University «Dnipro Polytechnic», Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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