Effective removal of phosphorus from high phosphorus steel slag using carbonized rice husk  

作　　者：Zhongliang Wang Yanping Bao Dazhi Wang Min Wang 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Journal of Environmental Sciences》2023年第2期156-164,共9页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 51574019)

摘　　要：High phosphorus steel slag and carbonized rice husk are two common wastes characterized by high generation and low secondary use values.Through the reduction of high phosphorus steel slag by biomass,both wastes were fully utilized,thus reducing the negative impact on the environment.In this study,variables such as temperature,time,and amount of reactants were changed to determine the optimal conditions for the reaction of steel slag with carbonized rice husk at high temperatures.The actual amount of reducing agent consumed during the reduction was significantly greater than that predicted by theoretical calculations.Adding three carbon equivalent of carbonized rice husk and maintaining at 1500℃ for 30 min could remove 79.25% of P_(2)O_(5) in the slag.By modeling the material cycle in which high phosphorus steel slag was treated with biomass,the product could be used for crop growth.Meanwhile,the reduced iron and residual steel slag can be used tomake steel again,thereby leading to a sharp reduction in fossil fuel usage and greenhouse gas emissions in this process.

关 键 词：High phosphorus steel slag Carbonized rice husk Reduction dephosphorization Material cycle 

分 类 号：X757[环境科学与工程—环境工程] X71