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。

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In areas where the water has been removed by 41 operational pumps, thick sludge remains.

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Getting out of its way took the tires of the Jaguar XJ out of ruts on bare asphalt and onto a thick layer of icy brown sludge deposited by an entire day of freezing rain.

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