在沉降炉上进行了掺加粉煤灰提高生石灰烟气脱硫率的实验。实验表明：生石灰掺加粉煤灰和消石灰掺加粉煤灰一样可以提高气体脱硫率和脱硫剂钙利用率。这种作用与反应温度有关，反应温度为５５０－７００℃时效果最好。同时也研究了粉煤灰与生石灰掺混方式对气体脱硫率和脱硫剂钙利用率的影响。 Experiments were conducted on the settling furnace to increase the desulfurization rate of quick lime with the addition of fly ash. Experiments show that the addition of fly ash and fly ash plus fly ash can increase the gas desulfurization rate and desulfurization agent calcium utilization. This effect and the reaction temperature, the reaction temperature is 550-700 ℃ best. At the same time, the effects of the blending methods of fly ash and quick lime on the gas desulfurization rate and the calcium utilization rate of desulfurizer were also studied.