湿式球磨耦合多步浸出处理铝电解槽废阴极炭研究OA

A wet ball milling pretreatment was coupled with multi-step leaching for spent cathode carbon.The effect of ball milling conditions on the deashing of spent cathode carbon was investigated,followed by phase analysis of residual impurities and by the desalination of milled solution waste.The results showed that the ash content of spent cathode carbon decreased from 44.78%to 6.15%,when treated with the optimized conditions including zirconia ball size(1.0～1.2 mm),feeding ratio(2 g spent cathode carbon/24 g water),milling speed(400 rpm),and milling time(6 h).Furthermore,the particle morphology was disaggregated from bulk aggregates to carbon nanoplatelets with reduced size.XRD analysis showed that a small amount of the NaAlSiO4 impurity remained in the treated carbon powder.The solution waste from ball milling treatment of spent cathode carbon was concentrated to separate out sodium fluoride with relatively high purity.