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Fly ash sintering the ceramsite process sulfur release regular research

Author: YangGuiXian
Tutor: GuoYaBingï¼›YuanJin
School: Taiyuan University of Science and Technology
Course: Fluid Mechanics
Keywords: Fly ash Ceramsite Sulfur Transformation mechanism
CLC: TQ174.1
Type: Master's thesis
Year: 2011
Downloads: 30
Quote: 0
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Abstract


U.S. Tyco since spread sintering equipment and technology , research fly ash sintering laws of sulfur release and morphology ceramsite process is transformed . First , the analysis of the impact of the different amount of wind and sintering atmosphere on the sintering process . The high air volume and low will cause the sulfur dioxide discharged into the atmosphere increases , the suitable sintering wind range of 260m 3 / h ~ 280m 3 / h . Sintering process sulfur dioxide precipitation curve presents the structure of the single peak , and an apparent turning point in the sintering process occurs mainly organic sulfur and sulfite sulfur precipitated before turning point , the turning point of the precipitated primarily sulphate sulfur , and the turning point before sulfur precipitation rate is higher than the rate of precipitation after the turning point . Sintered during the sintering process tank the presence of a large amount of reducing gas such as carbon monoxide and nitrogen oxide pollutants, carbon monoxide and other reducing gas , the calcium sulfate, and magnesium sulfate reduction reaction occurs at a lower temperature will be able to emit sulfur dioxide gas . The presence of nitrogen oxides as sulfur dioxide catalytic generate sulfur trioxide and sulfur dioxide will be part of the catalytic generate sulfur trioxide . Secondly, the application thermodynamic Discriminant Analysis calculated the chemical reactions which occur during the sintering process . Sulfur balance calculation and analysis of the amount and sources of SO2 emissions throughout the sintering process . The average amount of the conversion of sulfur dioxide emissions to the atmosphere during the sintering process is higher than in fly ash sulfur less 23% , the difference between the part of the sulfur is mainly because of the high moisture content of the flue gas in the sintering process , generated acid in the form of sulfur dioxide and a catalytic generation of sulfur trioxide was dissolved in water vapor to be discharged into the atmosphere . Finally , the conclusions obtained by small-scale test data to simulate actual working conditions , and combined to be able to add the the the iron sulfide sulfur coal the release regularity , simulation and analysis of the results with the actual working conditions consistent with a very good guide .

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