【摘 要】
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Steelmaking slag is one of the main by-products generated from steelmaking process.It has been utilized such as the raw material of road bed,various civil engineering and fertilizer so far.However,it
【机 构】
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Graduate School of Frontier Sciences,The University of Tokyo,Chiba 277 8561,Japan
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Steelmaking slag is one of the main by-products generated from steelmaking process.It has been utilized such as the raw material of road bed,various civil engineering and fertilizer so far.However,it is predicted that competition against other by-products or waste materials generated from different manufacturing industries increases in future and thus the increase in consumption of steelmaking slag in such fields is not expected.New methods to further utilize steelmaking slag must be developed from the viewpoint of not only stable consumption of steelmaking slag but also formulation of sustainable and environmental-friendly steelmaking process.Recently,the deterioration of ocean environment has become a critical issue in Japan.It causes the decrease of fishing catch and degradation of sea water quality.It is well known that lack of iron ion in seawater should be solved to improve the ocean environment.The application of steelmaking slag as a material to supply nutrient elements at coast has been tested in several Japanese seacoast and the positive effects on the improvement of ocean environment have been confirmed phenomenologically.However,the detail of dissolution mechanisms from steelmaking slag into seawater has not been clarified.In the present study,the dissolution behavior of various elements from steelmaking slag,or the mixture of steelmaking slag and additives has been observed,and the reaction mechanisms and the effect of its application at coastal environment on marine habitat recovery have been discussed.
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