Recovery and resource utilization of valuable elements from any iron ore tailing
Under the background of"dual carbon",the comprehensive utilization technology of tailings has entered a new stage,which can not only recover valuable elements in tailings through beneficiation,at the same time,the tailings resource utilization technology of using tailings powder as cement concrete admixture also has development prospects.The iron ore tailing is taken as the object,the valuable elements are recovered by beneficiation process,and then the feasibility of replacing cement with fine tailings powder＜5 mm produced by beneficiation process is explored.The results show that after the tailings are crushed and screened to a suitable particle size,iron ore concentrate with iron grade of 32.44％and recovery rate of 35.03％can be obtained by magnetic separation.When the fine tailings powder＜5 mm is used as admixture to replace cement,the mechanical properties of the concrete are stable when the substitution rate is 10％,and the compressive strength reaches more than 95％and the flexural strength reaches more than 99％of the concrete without admixture.The beneficiation recovery and the preparation of concrete raw materials are innovatively combined,which not only enriches and recovers iron ore concentrate,avoids the waste of resources,but also alleviates the environmental pollution caused by the accumulation of iron tailings,and realizes the recovery and resource utilization of valuable elements in the iron beneficiation tailings as a whole,which provides a certain basis and technical guidance for the comprehensive utilization of this type of resources.
iron tailingsrecovery of valuable elementsmechanical propertiesresource utilization
万方数据
维普
