Efficiency of iron removal in caoline biochemical processing

The efficiency of iron removal in the biochemical method of kaolin processing depends on the particle size of iron minerals, their magnetic properties and structural organization - weakly crystallized and crystalline magnetically ordered. It has been shown that preliminary disaggregation of kaolin particles during wet grinding and bioreduction of Fe (III) during storage of a kaolin suspension with the subsequent conversion of iron compounds from weakly magnetic and hardly soluble to soluble or highly magnetic promotes the removal of iron from kaolin. The advantage of combining storage of a suspension of kaolin with washing of kaolin with ammonium oxalate followed by magnetic separation has been revealed.