A influência da temperatura na secagem forçada da matéria-prima cerâmica da Formação Corumbataí na região do Polo de Santa Gertrudes (SP)

摘要: The ceramic tiles production in Brazil reached almost 1 billion m2 2013. More than 60% of these were produced the Ceramic District Santa Gertrudes (CDSG). main advantage industries from district is an application dry grinding process, which much more profitable wet used worldwide. process accounted for 73 % CDSG For route production, only rocks Corumbatai Fm. region are used, decreases costs raw material transportation. On other hand, booming industry has caused air pollution and river silting due to large amount dust generated by drying transportation material. companies need replace their current beneficiation areas industrial dryers. However, batch whose materials forced that break or crack during process. Three types materials, D (slightly weathered), I (weathered) M (highly weathered) examined present study order better understand behavior clays Clay minerals characterization made using qualitative quantitative XRD, petrographic studies, infrared spectroscopy (FTIR), thermo gravimetric analysis (DTA-TG-DTG), SEM e TEM. Quantitative XRD showed D, contain 53, 63 64 wt.% clay minerals, respectively. Illite smectite probably with a small mixed-layered illite-smectite. Sample contains also kaolinite according may be accompanied mixedlayered kaolinite-smectite. Thermal experiment was realized different temperatures (100°C, 200°C 300°C) fraction < 2 μm. Air dried pattern indicated collapses over 100°C. After 300°C ethylene glycol presented same as samples no thermal treatment. Technological tests sun, at 100°C, 300°C, linear shrinkage decrease temperature increase. Bending strength, plasticity consistence some tile shows cracks 300°C. Therefore, 100°C changed behavior. Plasticity loss interlayer dehydration. Such changes have modified technological materials. Key-words: Formation, Raw material, Drying.