关键词: 炉渣;钢渣;吸附量;吸磷率

Abstract:

With different proportion of the slag and blast furnace slag as raw material, slag particles adsorbent was made by mixing raw material into the ball and then roasting the ball. The static and dynamic adsorption test was used to investigate the adsorption performance to biogas slurry of NH+4N, TN, TP and COD. The results showed that pH, adsorption time and density of biogas slurry had significant influence on the slag particles adsorbent of different proportion adsorbing biogas slurry TP. Under proper conditions, the biogas slurry TP removal rates of different proportion of slag granules were all over 90%. Langmuir, Freundlich and Temkin models were good descriptions for the isothermal adsorption law of slag particles adsorbent for wastewater TP. The removal rates of NH+4N, TN, TP and COD of wastewater in dynamic adsorption test were all around 90%. Among them, the removal effect of No. ① mixed slag with slag and steel slag ratio 4∶1 was the best. Its average removal rate reached the discharge standard as 99.24%, 96.75%, 99.94% and 8971%, respectively. Slag particles could be used as adsorption material for treating NH+4N, TN, TP and COD.

Key words: slag, steel slag, adsorption quantity, phosphorus absorption rate