Abstract: The present invention provides a process for producing granular material useful as aggregate for the production of lightweight construction materials and involves the mixing of a pulverized Calcium Oxide material with a dewatered clay waste material in a paddle or ribbon type mixer until reaching a state of a uniform consistency paste like material and then allowing such material to cure for several days while periodically mixing to expose new surface area thereof to the air to facilitate evaporation until the water content of the cured material is less than six percent.

Abstract: The present invention provides a process for producing granular material useful as a phosphorus removal aggregate and involves the mixing of a pulverized calcium or magnesium oxide material with a dewatered clay waste material in a paddle or ribbon type mixer until reaching a state of a uniform consistency paste like material and then allowing such material to cure for several days while periodically mixing to expose new surface area thereof to the air to facilitate evaporation until the water content of the cured material is less than six percent.

Abstract: The present invention provides a process for producing granular material useful as a phosphorus removal aggregate and involves the mixing of a pulverized calcium or magnesium oxide material with a dewatered clay waste material in a paddle or ribbon type mixer until reaching a state of a uniform consistency paste like material and then allowing such material to cure for several days while periodically mixing to expose new surface area thereof to the air to facilitate evaporation until the water content of the cured material is less than six percent.

Abstract: The aqueous clay waste formed during a phosphate or other mineral recovery processes is flocculated in a well which is generally formed in a sedimentation lagoon, the supernatant is taken from the top of well and is recycled to the main flotation or other separation process (generally after running across sediment in the lagoon) and the thickened sediment which is formed in the well is pumped from the base of the well to one or more final lagoons where it is converted to a solid sediment by sedimentation and evaporation.

Abstract: A phosphate feed is separated into an enriched phosphate fraction and a waste aqueous stream which includes recoverable phosphate feed particles in an aqueous clay slime and which is flowed along a flow passage through a settling zone (where recoverable phosphate feed is recovered) into a quiescent sedimentation area where the slime settles, and water soluble polymeric flocculant for the slime is added to the aqueous stream to promote settling of the phosphate feed particles substantially without settling of slime in the settling zone and to accelerate sedimentation of flocculated slime in the sedimentation zone.