Temperature measurement data gathered from off-gas duct of a submerged arc furnace utilised for silicomanganese production

Blockage of the off-gas duct by dust contained in raw off-gas extracted from a submerged arc furnace (SAF), has been a recurring problem at a South African silicomanganese (SiMn) producer. The problem experienced has prompted an investigation in which sintering of the dust is evaluated as a possible mechanism for the observed blockages. As sintering is heavily dependant on temperature, one of the key factors to the investigation was determining the typical temperatures across the areas of the duct where blockages are commonly observed. Datasets of the measurements of the duct temperatures, across two extreme points in the duct, are hereby presented. Extreme 1 (SAF burden), which represented the hottest zone, was taken on the SAF burden using a calibrated optical pyrometer. Measurements in extreme 2 (duct cap), which represented the coldest zone in the ducts, were taken using a fixed thermocouple. Measurements from both extremes were taken over a period of four days. This dataset was useful in that it defined the minimum and maximum temperatures utilised in a laboratory-scale investigation onto the potential for sintering to be the cause of duct blockages on the SAF under investigation. Furthermore, going forward this data can be used in modelling of raw gas mass and heat transfer or other related dust transportation phenomena along the ducts. Additional foreseeable uses of this data includes applications in duct and baghouse designs where dust-laden off-gas temperature is a factor, energy loss calculations for the process, and researchers or other stakeholders interested in knowing the dust-laden off-gas exit temperature for a SAF operation applying an open or semi-open roof configuration, in SiMn production.