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Peter Fečko, Iva Janakova, Helena Raclavská and Barbara Tora

Application of flotation in the decontamination of sediments from the Cerny prikop stream

The stream Cerny prikop is located in the Ostrava city districts of Marianske Hory, Moravska Ostrava and Privoz. This locality belongs to the most polluted areas in Ostrava as it is unbearably polluted by the Coking Plant of Jan Sverma, company BorsodChem MCHZ (the chemical plant), City Waste Water Treatment Plant and a number of other companies in the given territory, all the way to its mouth to the Odra River. Moreover, the area is also affected by the construction of the D 47 motorway. The sediments of Cerny prikop represent a significant ecological burden within the Ostrava urban area. They are contaminated by a wide range of organic pollutants which have never been exactly identified.

Open access

Peter Fečko, Alena Kašpárková, Eva Pertile, Vlastimil Kříž, Barbara Tora, Andrzej Jarosiński and Iva Janáková

Application of pyrolysis residue from waste materials in black coal flotation

The paper deals with the verification of the floatability of pyrolytic oils, which were obtained through the pyrolysis of waste, namely mixed plastics, tyres and waste rubber in combination with black coal from Lazy Mine, and classical collector Montanol 551 in black coal flotation. Black coal from ČSA OKD, a.s. coal preparation plant was used for flotation tests. The results imply that it is possible to produce collectors from waste materials which may be applied in the flotation of black coal. Next, the paper focused on the identification of a suitable combination of pyrolytic oils and Montanol 551 in order to reach ash content in the concentrate below 10%.