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Preparation of Alinite cement clinker from MSWI fly ash

SHI Hui-sheng,WU Kai,YUAN Feng Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 200092,China  
Municipal Solid Waste Incinerator(MSWI) fly ash was used as raw materials in sintering Alinite cement clinker in the laboratory.The influence of lime saturation factor(KH),ratio of silica to alumina(a),magnesium content(m) and the amount of MSWI fly ash on the sintering were analyzed.The best sintering temperature and the microstructure of the clinker were studied too.The results showed that the Alinite cement clinker could be well sintered if the raw meal modulus were kept as 0.95≤KH≤1.05,4.0≤a≤5.0,2.0≤m≤5.0,and the MSWI fly ash mixing amount was about 30% in raw materials.It could be sintered properly at a temperature of 1200℃ and the microstructure was loose and lacunaris.
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