A proposed manufacturing plant southeast of the Tri-Cities will make building insulation by crushing stone, melting it and spinning the lava-like material in an industrial-strength cotton candy maker.
A proposed manufacturing plant southeast of the Tri-Cities will make building insulation by crushing stone, melting it and spinning the lava-like material in an industrial-strength cotton candy maker.
Rockwool North America, which makes insulation products from volcanic rock and other materials, will build a $175 million plant at Wallula Gap that will employ 125 when it opens. Rockwool is the North ...
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