ENERGY-SAVING TECHNOLOGY OF DISPERSION OF FIBROUS RAW MATERIALS IN THE MANUFACTURE OF HIGH-QUALITY TYPES OF PAPER AND CARDBOARD
An important role in the production of high-quality types of paper and cardboard is played by the dispersion process, which takes place at the stage of dissolution of the used types of fibrous raw materials. The absence of scientifically substantiated technological modes of the dispersion process, necessitates conducting research in this direction, the results of which are of scientific and practical interest. The regularities of the influence of the main technological factors at the stage of the descent of fibrous raw materials in an aqueous medium on the degree of dispersion of fibers obtained from widely used fibrous raw materials, which include primary (cellulose), secondary (waste paper) and synthetic. The results of the study allowed us to establish that the controlled technological factors are the concentration of fibrous suspension, the frequency of rotation of the rotor in the dispersing equipment and the duration of its mechanical action on fibrous raw materials in an aqueous medium. The range of variation of these parameters corresponded to the technical characteristics of the production equipment used. The main attention is paid to the concentration of fibrous suspensions (changed from 1 to 6%) and the rotor speed (increased from 1500 to 4500 min-1). It was found that the developed technological mode of dispersion of fibrous raw materials is energy-saving, as evidenced by a reduction in the duration of the dissolution stage by 2-3 times.