Five kinds of lime stone produced in Liaoning Province for different use purpose had been selected

and test study for their sulfur fixation performace by high temperature calcineration being carried out by using thermoanalysis instrument. Results show that the difference of decomposition property for different lime stones is not large

but the sulfur fixation performance of them is comparatively large under the test conditions; the influence of grain size （45μm

9

0μm） upon decomposition property and sulfur fixation performance of lime stone isn’t large; the influence of calcineration temperature upon decomposition property is not large

but upon sulfur fixation performance of lime stone is comparatively obvious

the optimum calcination temperature of lime stone to be about 100℃.