Study on Preparation and Properties of Photocatalytic Permeable Bricks from Vanadium-Doped Blast Furnace Slag AITranslate

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Chinese Library Classification Number:TQ426[化学工程]

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To realize the high value-added resource utilization of blast furnace slag,photocatalytic permeable bricks were prepared by green body molding and sintering with the slag as the main material,kaolin and potassium feldspar as binder and fluxing agent,and ammonium metavanadate was used as the doping vanadium source to improve the photocatalytic performance of the prepared material.The phase and morphology of the permeable bricks sintered at different temperatures were analyzed by XRD and SEM.The effects of sintering temperature and holding time on the properties of permeable bricks were studied.The results show that when the mass ratio of blast furnace slag,kaolin and potassium feldspar is 75∶10∶15,the doping amount of ammonium metavanadate is 45%TiO₂mass,the molding pressure is 10 MPa,the particle size of blast furnace slag is 630~850μm,the sintering temperature is 1120℃,and the holding time is 3 h,the permeability coefficient,flexural strength,appearance size deviation and frost resistance of the prepared permeable bricks meet the national standards,and they have good photocatalytic performance,with a permeability coefficient of 0.049 cm/s,a flexural strength of 10 MPa,and a photocatalytic degradation rate of 75%.