Abstract: The rubber materials were prepared from natural rubber filled with molten iron desulphurization slag.The effects of molten iron desulphurization slag/carbon black ratio, particle size of molten iron desulphurization slag and curing time on the mechanical properties of rubber materials were studied.The results show that the mechanical properties of rubber materials decreas slightly and the maximum utilization of the molten iron desulphurization slag can be achieved when the ratio of molten iron desulphurization slag/carbon black is 20∶30.No matter the particle size of the molten iron desulphurization slag among rubber materials was too large or too small, the dispersion and compatibility of the molten iron desulphurization slag in natural rubber deteriorated, which led the decrease of the mechanical properties.When the curing time was about 30 min, the mechanical properties of the rubber materials were optimal.

Key words: molten iron desulphurization slag;natural rubber;filler;mechanical property