5 million tons of mining tailings entered the river every year until 1995, while the fumes from the smelter created acid rain in the area.
1995年前，每年有150万吨矿山尾矿进入河流，而冶炼厂的烟雾造成该地区的酸雨。
This material forms a thick, weighty and highly abrasive sludge that must be transported from the flotation cells, where the copper is extracted, to a mine tailings disposal area.
这种物质会形成浓厚的、沉重的、具有很强研磨性的污泥，这种污泥需要从萃取铜的浮选槽中传输出来，然后输送到矿尾的处置区域。
To reduce the occupied area of land, coal wastes are used as the materials of the tailings dam.
为减少土地占用面积，采用煤矸石作为尾矿库初期坝的筑坝材料。
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