The Research Of Desulfurization Reagent Made By Lime And Pulverized Coal Ash On The Ore Sintering Flue Gas

A research was carried out on the desulfurization reagent made by lime that is common used in steel corporation and pulverized coal ash produced by steel corporation's fossil power plant, and a trial about the capability of the desulfurization reagent on the Ore sintering flue gas was done in the Angang's Circulating fluidized bed absorber tester. In this trial, the desulfurization reagent made by lime and pulverized coal ash was first used in the ore sintering flue gas desulfurization in circulating fluidized bed absorber and made a success. The aim of this study is to make the best used of the alkalescent raw material and alkalescent waste material of the steel corporation. So it help to find a new kind of the desulfurization reagent which can be used in the ore sintering flue gas desulfurization in circulating fluidized bed absorber and reduce the run cost, increase the desulfurization reagent using ratio. The result of the study may give the support to the ore sintering flue gas desulfurization.The research was done under the condition of 200~500 mg/m3 SO2 inlet concentration, 4150~5000m3/h and 80-135℃ ore sintering flue gas. The desulfurization reagent optimum burden test, the desulfurization reagent particle diameter distributing analysis , activation test by water, and increasing flue gas humidity test by steam were done. The results of test indicated that, when the desulfurization reagent made by lime and pulverized coal ash under the mass proportion of 1:2, the desulfurization reagent Ca using ratio and economy of material were better; The desulfurization reagent particle diameter comparison analysis shows that the process of desulfurization in circulating fluidized bed absorber may cause big particle decrease, and little particle increase. On the basic of the desulfurization reagent particle diameter distributing analysis, it gives the range from 5 to 350 u m of the desulfurization reagent particle diameter which adapt to the tester; and The desulfurization reagent has more desulfurated effect by 6% wateractivation; and the desulfurization reagent Ca using ratio and SO2 accumulative remove total have been increased by increasing flue gas humidity by steam. The selected desulfurization reagent continuous loop test indicated that in this tester the SO2 removal eflficiency was 70% at 1.5 of Ca/s mole ratio. The test and the results of test indicated that the desulfurization reagent made by lime and pulverized coal ash make the best use of the steel corporation alkalescence raw material and alkalescence waster. So it may be a new kind of the desulfurization reagent which adapt to the ore sintering flue gas desulfurization.