DEGREASING OF SCUM FROM THE DUMPS OF METALLURGICAL ENTERPRISES

Abstract

On the basis of data on the amount of finely dispersed oily slag dumped into landfills by metallurgical plants of Ukraine, it is shown that at least 180,000 tons of iron are dumped into landfills per year. The main consumer of partially degreased slag is the agglomeration production of full-cycle metallurgical plants. Waste scale is not returned to agglomerate production without prior degreasing. The importance of returning degreased slag not only to metallurgy, but also to other branches of industry is noted. An important stage in the technology of degreasing scum from dumps is its preliminary cleaning of debris. Attention is focused on the value of the lubricant in oiled scum as a fuel and on the importance of its extraction for further use. Degreasing technologies are considered and classified according to known methods of scale processing. The main temperature intervals of the stages of processing technologies are highlighted, the known characteristic combinations of methods and the level of degreasing of scale are shown. Issues that require additional research into the technological properties of waste slag in order to develop an economically feasible and ecological technology for degreasing of waste slag to obtain pure iron oxide powder Fe2O3-a and to solve environmental problems caused by multi-ton waste dumps of oily slag have been identified. Bibl. 28, Fig. 3.