Mining News: Much ado about a very little gypsum
Irrational, unachievable wastewater standard could shut down the Red Dog zinc-lead mine in Northwest Alaska for no good reason
J. P. Tangen
For Mining News
The Red Dog Mine is almost surely going to close in a very few short months. Why? They are not out of zinc ore already. It is because there is a little gypsum in their wastewater. Gypsum! What does that portend? Gypsum is a common enough material. It is used in wall boards in home construction....
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