Hydrated Lime/slack lime for mining and oil refining No of Employees: 100-200 People. COA,SGS,MSDS, ... industry, circuit board, pickling, printing & dyeing and paper making industries waste water treatment.2). Used to remove phosphate,most of the heavy metal ... . Stored in dry ,cool and ventilate place, it will keep good for 6 months. Hydrated Lime/slack lime for mining and oil refining