Development of Slag-making Technology

采用磁选法回收脱磷渣中的锰、磷和电炉渣中的铬。脱磷渣由富磷相、富锰相和基体相组成。发现各相的磁性能有显著差异。在本试验中，在0 / 0的未截留状态下，可回收约31%的富磷渣。在捕集温度为0时，可回收30T和约14%的富锰渣，富磷相污染小于20%。03T，粒径小于32μm，经物理搅拌。从电炉炉渣中还可以回收出含铬量约50%的铬铁，表明从炼钢炉渣中可以回收出磷、锰、铬，并将其视为二次资源。

Magnetic separation was applied to the recovery of manganese and phosphorus from dephosphorization slag and chromium from EAF slag. Dephosphorization slag consists of phosphorus enriched phase and manganese enriched phase together with matrix phase. The magnetic property of each phase has found to be significantly different. In the present experiment, about 31%of phosphorus enriched slag could be recovered at untrapped 3 of 0. 30T and about 14%of manganese enriched slag could be recovered with less than 20%of phosphorus enriched phase contamination at trapped of 0. 03T, particle size of less than 32μm with physical agitation. Chromium was also recovered from EAF slag as iron-chromite with about 50%of Cr. It was thus demonstrated from the present experimental results that phosphorus, manganese and chromium can be recovered from steelmaking slag which can be recognized as their secondary resource.