Preparation and Properties of Tin Tailings Based High Strength Ceramsite
LONG Yuxin
BAO Yinzhu
HUANG Xiaofeng
ZHU feng
LIU jiaxin
Abstract：The high strength ceramsite was prepared by using tin tailings(T),lake sediment(L)and fly ash floating beads(F)as raw materials and sodium silicate as binder.The effects of heat treatment system and sodium silicate content on the properties of ceramsite were investigated by the orthogonal experiment and single factor optimization experiment.The results show that when the raw material ratio of T,L,F by mass is 65∶25∶10,the sodium silicate content is 325 mL/kg,the preheating temperature is 600 ℃,and the sintering temperature is 1 120 ℃ for 15 min,the obtained high strength ceramsite with a density grade of 600 shows the following performance parameters:the 1 h water absorption is 0.41％,the cylinder compressive strength is 8.53 MPa.With the increase of sintering temperature,the phase transformation of Fe2O3→Fe3O4→MgFe2O4 exists in the ceramsite.The addition of sodium silicate provides part of the Si—O bond to form crystal phases such as sanidine,nepheline,which improve the strength of the ceramsite.
Keywords：ceramsitetin tailingsheat treatmentphase composition
Publication Date：2025-01-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 50-57 )