Influence of Rare Earth Tailings on the Pore Structure and Properties of Tailings Ceramsite
In order to improve the high value utilization of rare earth tailings,the tailings ceramics were prepared by using rare earth tailings instead of raw materials.The effect of rare earth tailings content on the pore structure and properties of the tailings ceramics was studied.The results showed that when the content of rare earth tailings increased from 0 to 40%,the bulk density of ceramsite decreased from 1 042 kg/m3 to 495 kg/m3,the cylinder compressive strength decreased from 11.7 MPa to 2.1 MPa.The average pore diameter increased from 0.24 mm to 0.45 mm,the porosity increased from 43.2%to 65.2%.The inclusion of rare earth tailings had no significant effect on the 1 h water absorption of ceramsite,which ranged from 0.3%to 1.3%.The performance of ceramsite after replacing raw materials with rare-earth tailings met the requirements of GB/T 17431.1-2010.
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