Aplikace pyrolýzních olejů ve flotaci uhlí

Abstract

With the interest and need for clean coal technologies, research and development is continuously required, a task impossible without understanding of coal beneficiation and utilisation principles. Computerisation and availability of better equipment is overwhelming, but flotation is still a surface chemistry based process in which what is frequently needed is the use of better reagents, better use of the existing collectors or optimisation of the conditions under which the process is carried out. While coal fines were in the past often discarded as tailings, the impact on the environment and the economic value of this product is currently taken into consideration. The dissertation deals with research in new pyrolysis based flotation agents for black-coal slurry flotation. The new collectors are required to be interesting both from the points of view of economy as well as ecology. The starting material for new flotation agent production, meeting both the requirements, are primary agricultural residues and next, various types of mixed waste plastic, tyres and waste rubber, which may be pyrolyzed with black coal. The objective of the dissertation was either substitution of a commonly applied collector or reduction of its consumption in flotation through a suitable combination with pyrolytic oils. Another objective was to obtain suitable marketable black-coal concentrate with ash content below 10 %. Keywords: