Статті
Постійне посилання на розділhttps://dspace.nuft.edu.ua/handle/123456789/7372
Переглянути
2 результатів
Результати пошуку
Документ Investigation the process of superfine grinding of components of pharmaceutical and cosmetic products on the bead mill(2018) Hrininh, Kateryna; Hordeichuk, Ruslan; Gubenia, OleksiiThe process of grinding the components of pharmaceutical and cosmetic preparations in a bead mill is considered. The degree of grinding was measured with a "Klin" grindometer, the temperature was measured by a contactless pyrometer, the power was measured by current clamps. The smaller the particle size and the higher density of the suspension, the greater the energy required to conduct the process, and the more heat will be released. When grinding titanium dioxide over a period of 0 to 30 minutes, the power increases from 205 to 209 W, with the most intensive increase observed in the interval from 5 to 10 minutes at 2.33 W. In addition, the temperature of the suspension increases from 21.9 to 23.4 °C, the density of the suspension increases from 889 to 1176 kg/m3, and the particle size decreases from more than 100 μm to 10 μm, the most intensive grinding in the first 5 minutes of the process. When the quinacridone red Red 122 is grinded, the power is increased from 205 to 210 W, the slurry temperature is from 22.4 to 24.3 °C, the density is from 870 to 952 kg/m3, and the particle size decreases from more than 60 μm to 2 μm, while the most intensive grinding occurs in the first 5 minutes of the process.Документ Comparative analysis of equipment and research the superfine grinding process of titanium dioxide and quinacridone red suspensions in the bead mill(2018-06) Hrininh, Kateryna; Hordeichuk, Ruslan; Gubenia, OleksiiIntroduction. Analytical and experimental research was conducted to improve the process and equipment for the superfine grinding of medicinal and cosmetic preparations. Materials and methods. On the basis of modern scientific literature and own experience was given a comparative analysis of modern equipment for ultra-fine grinding. In the investigation are used suspensions of titanium dioxide and quinacridone red 122 with the vaseline oil. Results and discussion. Among the recommended installations, the most versatile, productive, compact, energy saving, with high degree for grinding (up to 1 microns), effective in the process of dispersion and homogenization, have a simple constructive solution are bead mills. When grinding titanium dioxide over a period of 0 to 30 minutes, the power increases from 205 to 209 W. The temperature of the suspension is from 21.9 to 23.4 °C, the density increases from 889 to 1176 kg/m3, and the particle size decreases from more than 100 μm to 10 μm. The most intensive grinding in the first 5 minutes of the process. When the quinacridone red 122 is grinded, the power is increased from 205 to 210 W, the temperature of the suspension is from 22.4 to 24.3 °C, the density increases from 870 to 952 kg/m3, and the particle size decreases from more than 60 μm to 2 μm, while the most intensive grinding occurs in the first 5 minutes of the process. Conclusions. Among the recommended installations, the most optimal and productive are bead mills. It is recommended to carry out the grinding process on the bead mills periodically with the circulation of the suspension with the obligatory cooling.