تعدين خام الرصاص في تنزانيا. تعدين خام الحديد ة مفتوحة. تعدين خام الحديد ة مفتوحة Basics of an open pit mine Mine EngineerCom Open pit mines can be used in coal mining, and they are used extensively in "hard rock" mining for ores such as metal ores, copper, gold, iron, aluminum, and. أكثر من.