高硫煤分解磷石膏影响因素研究

在快速升温条件下,对高硫煤的反应物配比、物料粒径以及反应温度对还原分解磷石膏时气体中SO2的浓度、磷石膏中主要成分CaSO4的分解率和脱硫率的影响,结果表明在C/S(摩尔比)在0.7、温度大于1 000℃时,可使SO2浓度大于20%,磷石膏中CaSO4分解率大于90%,脱硫率大于85%.为高硫煤还原分解磷石膏制取高浓度SO2提供工艺技术参数和理论依据.以解决现行工艺中分解磷石膏时产气SO2浓度低且波动大,制酸成本高等问题;同时固体残渣还能作为制水泥的原料.

Study on Influence Factors Between High Sulfur Coal and Phosphogypsum

In the condition of high heating rate, studing on phosphogypsum reductive decomposition by high sulfur coal. The article study novel reducer high-sulfur coal and phosphogypsum ratio, reaction temperature effect phosphogypsum decomposition sulfur dioxides concentration and the main composition calcium sulfate's the rate of decomposition and desulphurization. The results show that the best reaction conditions are C/S molar ratio is 0.7, the temperature is more than 1000℃. There are the best reaction results in this condition. The concentration of sulfur dioxide is more than 20%. Phosphogypsum's the main composition calcium sulfate's the rate of decomposition is more than 90% and its desulphurization is more than 85%. These provide technology parameters and theory basis for high sulfur coal reduction decompistion phosphogypsum to preparation high concentration sulfur dioxide. These can solve the problems of the current system.