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Method for the production of mineral wool and iron from serpentine ore

United States Patent

October 11, 2011
View the Complete Patent at the US Patent & Trademark Office
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Method for the Production of Mineral Wool and Iron from Serpentine Ore
Magnesium silicate mineral wools having a relatively high liquidus temperature of at least about C. and to methods for the production thereof are provided. The methods of the present invention comprise melting a magnesium silicate feedstock (e.g., comprising a serpentine or olivine ore) having a liquidus temperature of at least about C. to form a molten magnesium silicate, and subsequently fiberizing the molten magnesium silicate to produce a magnesium silicate mineral wool. In one embodiment, the magnesium silicate feedstock contains iron oxide (e.g., up to about 12% by weight). Preferably, the melting is performed in the presence of a reducing agent to produce an iron alloy, which can be separated from the molten ore. Useful magnesium silicate feedstocks include, without limitation, serpentine and olivine ores. Optionally, silicon dioxide can be added to the feedstock to lower the liquidus temperature thereof.
O'Connor; William K. (Albany, OR), Rush; Gilbert E. (Scio, OR), Soltau; Glen F. (Lebanon, OR)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
12/ 124,421
May 21, 2008
GOVERNMENTAL RIGHTS The United States Government has rights in this invention pursuant to Contract No. 04-14-HRL from the U.S. Department of Energy (DOE).