Chapter 3.7 Refractories in Cement Manufacturing by Ricardo Araujo Mosci

Chapter 3.7 Refractories in Cement Manufacturing by Ricardo Araujo Mosci Portland cement manufacturing is an energy intensive operation that involves pyroprocessing of raw materials, referred to as the kiln feed, at extremely high temperatures in rotary kilns. The kiln feed primarily consists of limestone with some additions of clay, sand, and iron oxide that chemi- […]

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kiln Refractories & lining – bricks refractories lining calculator sheet

kiln Refractories & lining – bricks refractories lining calculator sheet   Kiln lining The operational time of rotary kilns depends prirnar- ily on the quality of the kiln lining. To insure long- time kiln operation one willing珍makes allowance for a.higher price for good quality kiln refractory. Unscheduled kiln downtime caused by poor quality kiln lining, […]

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Analysis of refractory degradation

Analysis of refractory degradationProcedures for its identification and documentation. Wear or Damage? Ideal Wear   (As consequence of  OEE > 0.85, service life of 12, 24, 36 months) Normal Wear (to date)   Slow, continuous loss of lining thickness, with service life < 12, 24, 36 months Damage   Sudden, rapid loss of lining thickness […]

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Refractories Selection Criteria

kiln Refractories Selection Criteria Zoning in cement kiln Drying Zone / Chain Zone Preheating Zone / Calcining Zone Safety Zone Upper and Lower Transition Zone Sintering (Burning) Zone Cooling Zone Drying Zone / Chain Zone High abrasion/wear caused by the movement of the chains Low material temperature (100-400 °C) Selection of Bricks: Dense fire-clay Air setting […]

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Why do we need cement kiln refractories

Why do we need cement kiln refractories ? To prevent this!   Definition / Classification Selection Criteria Analysis of refractory degradation Definition & Classification Definition & classification Types of bonding Basic (MgO, CaO) refractory types Acidic (Al2O3 – SiO2) refractory types Non-shaped products Examples According to ISO R 836, refractories are defined as “non-metallic materials […]

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