露天矿坑周围是一些开挖尾料的堆弃池和废矿垃圾场。储存在这些地方的废弃矿石，稍后经过过滤可以深入提取其中的金属。
The open pit areas are surrounded by an array of sculpted tailings ponds and mine dump areas; these receive mine waste rock for storage and later leaching for further recovery of metals.
目前镁制品行业在菱镁矿的开采、 煅烧过程中，大量的小颗粒矿石被废弃，这是一个很大的浪费。
At present, a great waste existed in magnesium-related filed due to the abandonment of tremendous finely gruond minerals during the exploitation and calcination of magnesite.
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