Low iron silica sand product and method of making same
OwnerJames M. Wells, IIIinventor
Life of this patent
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Abstract
A method for producing a low iron silica sand product suitable for glass production has an SiO2 content of at least 99.8% by weight, an Fe2O3 content of less than 0.008% by weight, an Al2O3 content of less than 0.1% by weight, and a CaO content of less than 0.05% by weight includes preparing a slurry of crude ore, wherein the crude ore has a sand content of about 75% to 80% by weight, a kaolin/mica content of about 15% to 25% by weight, a dark, heavy mineral content of about 1% by weight, and an Fe2O3 content of about 0.5% to 1.0% by weight. Particles having a size of less than about one hundred forty mesh are removed, and contaminant material is removed. The sand is then separated from the slurry, dried, and passed through a rare earth magnetic separator.
Claims20
A low iron silica sand product suitable for all grades of glass production, the sand product derived from crude ore having a sand content of about 75% to 80% by weight, a kaolin/mica content of about 15% to 25% by weight, a dark, heavy mineral content of about 1% to 2% by weight, and an Fe2O3 content of about 0.5% to 1.0% by weight, the low iron silica sand product comprising an SiO2 content of at least 99.8% by weight, an Fe2O3 content of less than about 0.008% by weight, an Al2O3 content of less than about 0.1% by weight, and a CaO content of less than about 0.05% by weight.
A method for producing a low iron silica sand product comprising an SiO2 content of at least 99.8% by weight, an Fe2O3 content of less than about 0.008% by weight, an Al2O3 content of less than about 0.1% by weight, and a CaO content of less than about 0.05% by weight, the method comprising:
- preparing a slurry of crude ore and water, wherein the crude ore has a sand content of about 75% to 80% by weight, a kaolin/mica content of about 15% to 25% by weight, a dark, heavy mineral content of about 1% by weight, and an Fe2O3 content of about 0.5% to 1.0% by weight;
- removing particles from the slurry having a size of less than about one hundred forty (140) mesh;
- applying shear forces to particles remaining in the slurry to remove contaminant material attached to the particles;
- separating the contaminant material from the slurry;
- separating sand from the slurry;
- drying the sand;
- and then
- feeding the dried sand through a rare earth magnetic separator to produce a low iron silica sand product suitable for all grades of glass production.
A method for producing a low iron silica sand product comprising an SiO2 content of at least 99.8% by weight, an Fe2O3 content of less than about 0.008% by weight, an Al2O3 content of less than about 0.1% by weight, and a CaO content of less than about 0.05% by weight, the method comprising:
- preparing a slurry of crude ore and water, wherein the crude ore is from a post-Cretaceous strata and has a sand content of about 75% to 80% by weight, a kaolin/mica content of about 15% to 25% by weight, a dark, heavy mineral content of about 1% by weight, and an Fe2O3 content of about 0.5% to 1.0% by weight;
- removing particles from the slurry having a size of less than about one hundred forty (140) mesh;
- applying shear forces to particles remaining in the slurry to remove contaminant material attached to the particles;
- separating the contaminant material from the slurry;
- separating sand from the slurry and removing sand particles having a size greater than thirty (30) mesh;
- drying the sand;
- and then
- feeding the dried sand through a rare earth magnetic separator to produce a low iron silica sand product suitable for all grades of glass production.
Dependencies are inferred from the claim text.