The mechanism of additive ZC-1 for catalyzing combustion of coke breeze in sintering of iron one fines was studied by using X-ray Diffraction, TGA and GC (Gas Chromatographer), by which energy saving was achieved on sinter pot test. The results show that the distance between cleavage planes is enlarged and the π-electrons are re-distibuted because of the insertion of cations/molecules of ZC-1 into the cleavage planes of carbon , resulting in the weakening of C-C bond, improving the adsorption of oxygen and lowering the activation energy of gasification of carbon from 25.8 kJ/mol to 18.9 kJ/mol , and the burning rate being increased and combustion residual reduced, all of which can lead to lower solid fuel consumption . Compared with the sintering test without addition of additives , the solid fuel consumption is reduced by 16.0%, meanwhile, the rate of finished sinter, the output of finished sinter and the tumbling index are increased by 2.03%, 7.0% and 3.71%, respectively, with incorporating 0.2% of additive ZC-1 in the sintering mixture, which is in agreement with the catalyzing mechanism of ZC-1.