Many plants are using gypsum formed by using spent sulphuric acid and lime as a set controller.There is no quality problem observed by using the gypsum.
Regards,
R.M.Sahu,
India
Many cement plants use synthetic or artificial gypsum rather than natural gypsum. There should be no affect on the product quality but the handling characteristics of the artificial gypsum will be different. Your handling equipment may require modification.