Desulphurizer is one of the key factors in the field of desulphurization technology In this paper, the influence of several additives on the desulphurization effect of calcium-based compounds and the mechanism were analyzed based on a lot of experiments Different kinds of sulfur-fixing agents based on CaCO 3 were prepared by inputing some single additive, some mixed additives and reformed by some chemical solutions The desulphurization rate of these agents was studied with ZCS-1 intelligent sulphur d...