REVIEW ON GLOBAL DEVELOPMENT OF TREATMENT AND UTILIZATION OF STEEL SLAG

In China, steel slag is produced with a output higher than 100 million ton per year. Whereas, the resource utilization rate of steel slag is at a low level of about 30%, which is far lower than the developer countries, especially in the road construction and internal recycling field. Facing the problem of stability and resource utilization, steel slag treatment and utilization technologies at home and abroad were discussed in this paper. The new technology-self-slaking high pressure technology, is a leading process and almost overcome nearly all the defects presented in the traditional processes, such as low feasibility, low stability, and high pollution. Furthermore, we should develop more new comprehensive utilization technology with high added value and low emission, in order to solve the problem of low expansion of steel slag, and promote the utilization of steel slag in structural concrete.