International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Recycled waste paper is a raw material for the paper industry. One of the most important processes in the recycling of waste paper, for the ability to print, is deinking. One perspective and ecological method for implementing that is the flotation process with enzymatic treatment. The aim of this study is to investigate the deinking of secondary fibrous material, obtained from waste paper, by flotation of offset printed paper by the use of different types of enzymes – lipase, cellulase, amylase, xylanase, on the process of deinking by flotation. In this research are being investigated various proportions of enzymes, and combinations thereof with surfactants. Their ability of deinking is calculated. As a result the treatment of the secondary fibers with the enzymes, improves the papermaking properties. The improved recovery papermaking properties of secondary fibers by the effect of enzymes, is able to increase the number of cycles of use of waste paper and to improve some parameters of the paper produced from secondary fiber. The optical properties of the obtained deinked fiber material are investigated and the possibilities for its usage in the composition of various types of paper and paperboard.

Nowadays are very actual problems of working out waste of non-ferrous metallurgy such as converter slags of the copper enterprise. One of the new direction of additional extraction of copper from slags of converter section is combine method including mechanochemical activation and concentration by flotation of nanostructured initial material. The first stage – is receiving thin crumbled material with high degree of dispersion. This permit furnish an explanation of noticeable changing of properties of high dispersion materials: appearance of activity centers on the surface of minerals because there are alterations and become activity of electronics structures of surfaces layers as consequence of modification of surface. Moreover, take places processes of opening of capsules, including captured particles of some components (metals, minerals from slag, such as copper sulphides etc.). As far as, converting is going with high speeds it’s possible mechanical capturing of initial particles which didn’t participate in interaction during of process converting, minerals may be screened by slag melt. Under the condition of the slowly cooling predominated kinetic mechanism of geterogenic interaction in the silicacontainig system. On the basis of investigations was worked out the technological regulations and fulfilled the industrial probation.