Pollution characteristics， risk control and resource utilization suggestions for steel slag storage sites

The annual production of steel slag in China exceeds 100 million tons， with a low comprehensive utilization rate. The accumulated residual storage exceeds 1 billion tons， and the large amount of storage poses a big threat to the surrounding ecological environment. At present， researchers mainly focuses on the resource utilization methods of steel slag， and there has been little research on environmental safety issues of large amounts of residual steel slag. This article provided a detailed introduction to the properties and characteristics of steel slag from the perspectives of its composition， structure， and pollution characteristics. Multiple typical steel slag storage sites in the northern and southern China were selected for pollution characteristics analysis and environmental hazard assessment. Based on the pollution characteristics and utilization status of the steel slag storage sites， comprehensive management suggestions for environmental risk control and utilization of steel slag were proposed. This article can provide technical references for the management of legacy steel slag storage sites and a reliable basis for the management of bulk industrial solid waste.