| Iron tailings discharge serious pollution of our living environment,how to handle and use these iron tailings become a major problem we face.In this p aper,industrial waste iron tailings as the main raw material,through the grin ding,the use of mechanical agitation foaming process,pre-made body of high porosity,high temperature sintering,to prepare a high porosity and low densi ty high strength porous material.Confirmed by experiments recipe foaming system components. Get the best conditions for the preparation of iron powder high stability of tailings slurry required. The results show that : when the p H of the solution = 10:00,foa ming agent foaming agent per liter of water is added 0.3g,foaming effect po lyvinyl alcohol 50 g,the amount of mixing tailings powder 650 g,get the best feed paddle,The most stable foam volume.Performance integrated iron ore tailings porous ceramics,identified during t he preparation of porous ceramic sintering temperature range of 1125 ℃-1150℃,holding time of 40 min. The density of the obtained iron tailings porous ceramic material is 0.36-0.54 g / cm3,compressive strength 0.25-0.34 MPa,poros ity was 69%-70.5%,the water absorption of 49%-51.1%.When incorporated into 12 g pulverized coal prepared in iron tailings density of 0.15 g / cm3 ligh tweight iron tailings porous ceramics. X- ray diffraction analysis, the main f orm of porous crystalline phase ceramic material is aluminum pyroxene Ca(Mg FeAl)(SiAl)2O6,diopside Ca(MgAl)(SiAl) 2O6 and pyroxene Ca(Mg Fe) S i2O6.SEM microstructure observation showed that the ceramic aperture formed l arger and the pore walls also form a large,rich layers of holes.This material preparation process is simple,wide source of raw materials,can be mass-produced. According to the special structure and properties of iro n tailings porous ceramic material,the material has potential applications as a water pollutant gaseous pollutants adsorption fixed media,catalyst supports,building insulation materials and the like. |
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