Short Video 3 about Sulfur & Chlorine & Alkalis in Cement Rotary Kilns at Cement Industry

Описание: Sulfur and Chlorine & Alkalies in Cement Rotary Kilns

In cement kilns, sulfur (S), chlorine (Cl), and alkalis (Na, K) interact in complex volatile cycles, causing issues like hard alkali rings, preheater clogging, and kiln shutdowns by vaporizing in the hot zone and condensing in cooler preheater parts, leading to unstable operation and refractory corrosion. Balancing these elements, often using the Alkali/Sulfur Ratio (ASR), is crucial, with excess sulfur/chlorine combining with alkalis to form sticky compounds, while imbalances can harm clinker quality and plant efficiency. Managing these cycles involves controlling inputs, implementing bypass systems to remove volatiles, and sometimes adjusting raw materials to maintain stability.
Balancing Act: The Alkali/Sulfur Ratio (ASR)
Formula: ASR = SO₃ / (K₂O + 0.5 * Na₂O).
Target: Ideally around 1.0 (range 0.8-1.2) for good balance, but this varies.
High Sulfur/Low Alkali: Leads to alkali sulfate buildup and potential refractory issues.
High Alkali/Low Sulfur: Can lead to recirculation and clinker quality problems.

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