CEE Jan-Mar 2012

Table I. Chemical analyses of the solid soda waste and raw materials Composition (%) Solid Waste Clay Iron Ore Si02 1.33 57.13 39.46 AI203 0.00 15.45 2.26 Fe203 0.72 5.74 47.56 CaO 50.90 5.97 0.75 MgO 1.81 2.57 0.20 so3 3.02 0.00 0.09 Na20 1.55 0.89 0.10 K20 0.07 2.14 0.19 cr 6.01 0.00 0.00 KizdirmaKaybi/LOI 34.59 10.11 9.39 Table 2. Recipe of the raw mix Ingredients By weight (%) Soda Solid Waste 73.5 Clay 26.3 Demir Cevherillron ore 0.2 Table 3. Mixing modules of raw feed Lime Staruration Factor (LSF) Silica module (SM) Alumina Module (AM) 76.12 2.60 1.93 Table 4. The burning regimes of the raw mix Sample Code Burning Temperature(C! Burning Durat1on(min) A1050- 60 1050 60 A1050- 90 1050 90 A1100- 60 1100 60 A1100- 90 1100 90 A1150 - 60 1150 60 A1150- 90 1150 90 A1200- 60 1200 60 A1200- 90 1200 90 A1200- 180 1200 180 A1350 -10 1200+1350 180+10 A1450 -10 1450 10 waste usage and to obtain a type of low energy cement. The mixing modules of the raw mix are also provided in Table 3. The m1xmg modules were calculated by the assumption of x part of soda solid waste, y parts of clay and I part of iron ore by weight [Duda, 1985]. Only one raw mix was prepared and all the different burning trials were performed by the same raw mix. Burning Regime In order to observe the effects of different burning temperatures and duration on alinite clinker formation, 11 different burning regimes were selected. The burning regimes are presented along with the sample codes in Table 4. All the samples had the same raw mix. Burning durations were kept longer than ordinary Portland clinker to ensure the burning . The samples were heated up to their maximum burning temperature stated at a rate of 30°C/min and were kept at this temperature for a certain time indicated as duration. The samples were produced in platinum crucibles. By this way, all the parameters were kept constant and only the effects of temperature and time werr.; observed. Results and Discussion The resulting clinkers of the abovementioned experimental programme are characterized by chemical , mineralogical and scanning electron microscopy. The results will be separately discussed for each analysis method. 16