中国有色冶金

Steel slag is one of the bulk sold wastes that have not been well utilized by steel mills. At present, the overall utilization rate of steel slag in China is only around 20%, much lower than in many developed countries, in which over 90% of the slag can be utilized. The amount of unused steel slag stock in China is enormous: 1 billion metric tons. After an overview of the related literature by scholars of China and other countries on steel slag utilization, the paper gives a short description of the six main processes of steel slag treatment in China, and compares their advantages and disadvantages. Then the paper reviews the recycling practices inside steel mills, including recovering valuable metals and sintering. Lastly the paper reviews the recycling practices outside steel mills, including the utilization of steel slag in construction materials making, road pavement, fertilizers, ceramic products, pollution control of sea and other water bodies. The paper concludes that for better utilization of steel slag, a more detailed classification system, upgraded milling process and equipment are needed.