Abstract: The article discusses the technique of using titanium gypsum frying to alter the nature of gypsum and produce light-quality wall material. DSC,XRD and SEM, together with other ordinary chemical and physical methods, are applied to test the physical properties of titanium gypsum after frying,according to the gypsum standard of P.R.C. With different temperatures and admixtures, the physical properties of the titanium gypsum are influenced. The results show that the strength of the titanium gypsum changed with the rise of the frying temperature and the best temperature is 170 ℃。Admixture-adding made a change in strength of the titanium gypsum. The best added amount is as follows: concrete 8%-12%, lime 1%, calcium lignosulfonate 0.4%-0.5%. Meanwhile the micro-structure of the titanium gypsum changed from being elongated and tabular to flocculated. Body of the titanium gypsum was fattened and the tissue also changed greatly.

Key words: titanium gypsum%gypsum-frying%wall material