Patent ID: 7585485

Claim:
A process for the chemical and physical conditioning of phospho gypsum comprising: (a) drying a first portion of phospho gypsum at from about 60° C. to about 150° C. to form dehydrated phospho gypsum, (b) mixing the dehydrated phospho gypsum with the pre-dried phospho gypsum the pre-dried phospho gypsum formed by drying a second portion of phospho gypsum at from about ambient temperature to about 40° C., to form an homogenized mixture, wherein the dehydrated phospho gypsum comprises from about 100 to about 40 wt % of the total weight of the homogenized mixture and the pre-dried phospho gypsum comprises from about 0 to about 60 wt % of the total weight of the homogenized mixture; (c) mixing the homogenized mixture with agglutinating-neutralizing agent(s) to form a agglutinated-neutralized mixture, wherein the agglutinating-neutralizing agent(s) are added and mixed for neutralizing and stabilization of harmful compounds in the solid state; and (d) agglomerating and hardening the agglutinated-neutralized mixture by the addition of water, on an agglomerating disc or other agglomerating device, to a final content of from about 10 to about 30 wt % water, to form an agglomerated material.