Оптимізація процесів механоактивації за допомогою аналізу кривих розподілу частинок порошку за їх розмірами
Journal Title: Математичне моделювання - Year 2018, Vol 1, Issue 2
Abstract
OPTIMIZATION OF MECHANOACTIVATION PROCESSES BY ANALYSIS OF THE CURVES OF DISTRIBUTION FOR POWDER PARTICLES BY THEIR SIZES Brekharya G.P., Bondar N.P. Abstract Authors of article a study was conducted on predicting the effect of mechanoactivation on the occurrence of regenerative processes Fe2O3 → Fe3O4. It is known that the grinding of materials leads to an increase in powder dispersion, but most recently mechanical processing is used to activate physical and chemical processes. To date, there is a topical way of obtaining pure iron from iron-ore raw materials without a dossier. At the same time, important processes are the disclosure of minerals during shredding and increasing the surface area of particles necessary for a better flow of restorative reactions. For research was selected hematite ore, the main phase components of which are SiO2 and Fe2O3. The iron ore was subjected to milling in a vibrating mill. Based on the results of measurements of the particle size of the powder, were constructed graphs of the distribution of the relative number of particles by their size. The use of the program Wolfram Mathematica allowed mathematically to describe the experimentally constructed graphs. It is known that reducing reactions occur faster with an increase in the surface area of powder particles, but there are problems when measuring this value. Therefore, it is advisable to use the analytical method of the transition from the dependence in dN/dX to the equation dS/dX. In this case, the differential equation of distribution is different in terms of power. The analysis of the obtained curves showed that in the initial stages of shredding the source material, the distribution curve has two characteristic maxima corresponding to the probable dimensions of the phase components: 6 μm for SiO2 and 20 μm for Fe2O3. The optimum mono-disperse powder was obtained as a result of milling in a vibrating mill for 70 h. This allows for improved separation after the transfer of hematite into a magnetic state. References [1] Molchanov V., Seleznyova O., and Girnov E. Aktivatsiya mineralov [Activation of minerals]. Moskva, 1988. 208 p. [2] Avvakumov E. Mehanicheskie metodi aktivatsii himicheskih protsesov [Mechanical methods of activation of chemical processes]. Novosibirsk, 1979. 192 p. [3] Orfanova M., Semchuk Y. Perspektivi vikoristanya metodiv mehanoaktivatsii dlya virishenya problemi utilizatsii vidhodiv. [Prospects for the use of methods of mechanical activation to solve the problem of waste disposal]. Visnik KNU im.Mihaila Ostrogradskogo, 2013, no. 5(82), pp. 160–165. [4] Ponomar V., Dudchenko N., Krik O. Kinetichni parametric protsesu vidnovlenya gematitu do magnetite za dopomogoyu biomasi. [Kinetic parameters of the process of hematite to magnetite recovery using biomass].Visnik DU. Seriya: geologiya, geographiya, 2017, no. 25(1), pp. 53–62. [5] Hodakov G. Fizika izmelcheniya. [Grind Physics]. Moskva, 1972. 308 p.
Authors and Affiliations
Г. П. Брехаря, Н. П. Бондарь
Keywords
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- EP ID EP444976
- DOI 10.31319/2519-8106.2(39)2018.154248
- Views 72
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