IMPROVING THE PRODUCTIVITY OF OPERATION OF ROTARY FURNACES USING THE TPM METHOD

Zinc oxide concentrate production from industrial waste is performed in the so-called rolldown process – in rotary furnaces. It is a complex technological process. Incorrect process execution will cause a large number of unplanned stops that significantly affect production. The purpose of the work was to analyze upgrade of technological lines used for the production of zinc oxide concentrate at B. Recycling company. The detailed purposes of the study included the analysis of fault time, standstill of the planned technological lines no. 1 and 6 for processing of steel fly ashes, and line no. 2 for processing of zinc-bearing sludges. In the study the Total Productive Maintenance method elements was used. The histograms for planned downtime and failures of individual technological lines for a period of one year were developed and the MTTF, MTBF and OEE indices for three production lines were set. The results were analyzed. A solution was proposed to shorten the failure time of the above mentioned technological lines.