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washing of silica sand in mines

Mar 10 2020 · Chippewa County still plans on addressing elevated levels of arsenic and other heavy metals found in mud left over from the frac sand washing process at a Superior Silica Sands mine Scholz said the county is working with the state Department of Natural Resources and is planning to schedule a public presentation on the matter in the coming weeks... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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