Current status and research progress of comprehensive utilization of phosphorus tailings
China is rich in phosphorus ore resources,but most of them are medium and low-grade phosphorus ore,which need to be beneficiated to be used in chemical production.Phosphorus tailings are solid wastes with low phosphorus content produced by beneficiation of phosphorus ore,which can be regarded as low-grade phosphorus tailings,mainly composed of calcium oxide,magnesium oxide,phosphorus pentoxide,silica,and have great potential for comprehensive utilization.In this paper,in view of the structure,composition,and physicochemical properties of phosphorus tailings,the current situation and research progress of the comprehensive utilization of phosphorus tailings were reviewed.The utilization of phosphorus tailings in the filling of the mine,leaching of calcium and magnesium and other valuable elements,re-election and recovery of phosphorus elements,agricultural applications,building applications,environmental protection applications and other as-pects was elaborated in detail.The problems faced in the comprehensive utilization of phosphorus tailings were analyzed and prospects for its development were outlooked.It was pointed out that the development of a new environmentally friendly and efficient comprehensive utilization process of phosphorus tailings was the development direction of phosphorus tailings utili-zation,which was the common need of phosphorus chemical enterprises and society and it was in line with the basic na-tional policy of green and efficient utilization of resources and sustainable development.
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