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1. Feldspar
FELDSPAR comprises a group of minerals containing potassium, sodium, calcium and aluminium silicates. They are the most common rock-forming minerals.
Name | Formula | SiO2 | Al2O3 | K2O | Na2O | CaO | BaO | Specific Density | Hardness | Type | Color |
Potassium Feldspar | K2O·Al2O3·6SiO2 | 70 | 16 | 9 | 4 | 2.56 | 6 | orthoclase | White, pink, milky white | ||
Sodium feldspar | Na2O·Al2O3·6SiO2 | 63-70 | 16-20 | ≤1 | ≥8 | 2.60 | 6 | albite | White, blue, gray, no-color |
2. Applications
Feldspar used as raw material of glass industry (50-60% total consumption) and ceramic industry (30% total consumption),besides, it is widely used in chemical processing, abrasive tools, glass fiber and welding rod industries.
Field | Application | Quality requirement |
Glass and Glass making products | Feldspar as raw material of flat glass and kinds of glass make products, it can decrease the glass melting point, reduce the use of calcined soda. Sodium feldspar as raw material of glass fiber can improve the fiber quality and as substitute of pyrophillite. | Al2O318% Fe2O30.6% Na2O+K2O10% |
Ceramic industry | Feldspar as blank material in the production of ceramic, enamel, electrotechnical porcelain products (20-40% addition) and as raw material to glaze (20-70% addition) | Fe2O30.3-1.0% |
Cement industry | As one of raw material to producing white cement | |
Chemical Processing | Crushed feldspar can be used as filling material to latex, painting,carbamic acid, acetic acid, propylene or like products. | As filler, bigger content of free quartz is preferred; as filler to cosmetic powder, 2-8um alkali feldspar is required. |
Abrasives | Powdered feldspar can be used in abrasive industry. | |
Other fileds | wide applications are found in paper making, refractory product, machine manufacturing, painting, welding rod etc that feldpar is used as filler. |
3. Sizes
32mesh, 40mesh, 60mesh,100mesh, 200mesh, 325mesh, 400mesh, 600mesh, 800mesh, 1250mesh etc other sizes are available upon request.
