Hydrated Lime/slack lime for mining and oil refining No of Employees: ... , ash Calcium Powder1. Features 1). Lower cost for water treatment 2). Widely range of application 3). ... Mainly adjust acid waste water PH value, widely used for electroplate, Chemical industry, circuit board, pickling, printing ... ventilate place, it will keep good for 6 months. Hydrated Lime/slack lime for mining and oil refining