Sepro Mineral Systems,  · Sepro Mineral Systems Corp. is a Canadian company founded in 1987 and headquartered in British Columbia, Canada.The outcome of the acquisition of Sepro Mineral Processing International by Falcon Concentrators in 2008, the companies' key focus is the production of mineral processing equipment for the mining and aggregate industries. ...Cements & Mortars | cactusbush,  · Slaking involves adding water (H 2 O). Slacked lime ( Ca(OH) 2) can mean either a wet putty or a dry powder which still contains some chemically bonded water. Industry buys and transports it in bulk but dry slacked lime for retail can be purchased in strong bags at everyday hardware or lumber stores.