PROCESS FOR PRODUCING CALCIUM SULFATE SEMI-HYDRATE, CALCIUM SULFATE SEMI-HYDRATE PRODUCED BY CARRYING OUT SAID PROCESS AND MIXTURE OF MORTAR CONTAINING SUCH SEMI-HYDRATE

摘要

THE PRESENT INVENTION CONCERNS A PROCESS FOR THE MANUFACTURE OF CALCIUM SULPHATE SEMI-HYDRATE IN ALPHA CONFIGURATION FROM AN INDUSTRIAL RESIDUE BASED ON CALCIUM SULPHATE DIHYDRATE, CONSISTING OF CHANGING THE MATERIAL IN AN AUTOCLAVE, TO DESAERATE THE AUTOCLAVE , TO THE SUPPLY IN STEAM OF WATER UNDER PRESSURE, AT A TEMPERATURE OF 105 TO 180 C THEN, AFTER PROCESSING THE DIHYDRATE, TO RETURN TO THE NORMAL PRESSURE, TO REMOVE THE SEMI-HYDRATE ALPHA, AND TO ELIMINATE BY DRYING THE RESIDUAL WATER ADHERING THEREON. / P P THE INVENTION CONCERNS CHEMICAL PLASTERS AND PLATES FOR THE DESULFURIZATION OF SMOKE GAS AND IT MORE PARTICULARLY SEEKS THE MANUFACTURE OF SEMI-HYDRATE ALPHA FROM PLASTERS OF INDUSTRIAL REBUSES. .