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Kaolin (china clay) is a hydrated aluminum silicate crystalline mineral (kaolinite) formed over many millions of years by the hydrothermal decomposition of granite rocks. Hengyang kaolin is characterized by its fine particle size, plate like or lamellar particle shape and chemical inertness.
Clay is used in various industries like rubber, paper, ceramic, glass, paint , plastic and others. Each industry requires different grades of clay in terms of size and content of different minerals. Paper quoting is the highest value chain and possibly ceramic is more generic.
| Chemical Analysis | Levigated China Clay Powder | Water Washed China Clay Powder | Natural China Clay / Kaolin Powder | Water washed China Clay Lumps | Natural China Clay / Kaolin Lumps |
| Whiteness (%) | 90% – 92% | 90% – 92% | 88% – 90% | 90% | 88% |
| Moisture (%) | < 0.5 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| SiO2 (%) | 47 to 48 | 58 to 59 | 74 to 75 | 47 to 48 | 74 to 75 |
| Al2O3 (%) | 37 to 39 | 26 to 27 | 16 to 17 | 37 to 39 | 16 to 17 |
| K2O (%) | 3 to 3.2 | 0.5 to 1 | 0.5 to 1 | 3 to 3.2 | 0.5 to 1 |
| Na2O (%) | 0.5 to 1 | 0.5 to 1 | 1 to 2 | 0.5 to 1 | 1 to 2 |
| CaO (%) | 0.1 to 0.2 | 0.5 to 1 | 0.5 to 1 | 0.1 to 0.2 | 0.5 to 1 |
| MgO (%) | 0.2 to 0.3 | 0.4 to 0.5 | 0.3 to 0.4 | 0.2 to 0.3 | 0.3 to 0.4 |
| LOI (%) | 9 to 10 | 11 to 12 | 5 to 6 | 9 to 10 | 5 to 6 |
| Particle Size | 300 mesh | 300 mesh | 300 mesh | Lumps | Lumps |
| Top cut | 50 micron | 50 micron | 50 micron | – | – |
| Applications | Paints, Plastics,Paper Cosmetics Industry | Paints, Plastics, Paper Cosmetics Industry | Ceramic Industry, Rubber Industry and many other uses | Paints, Plastics, Paper Cosmetics Industry | Ceramic Industry, Rubber Industry and many other uses |
| Size | Inside dia. Length of shell (mm) | Ball charging amount (tons) | Mill revolution (min-1) | Power consumption (kW) | Motor output (kW) | Capacity (t/h) | |
| A | B | ||||||
| 1212 1515 | 1200×1200 1500×1500 | 2.05 4.15 | 32.0 29.0 | 16.5 35.8 | 18.5 37 | 1.5 3.5 | 1.3 3.1 |
| 1818 2121 | 1800×1800 2100×2100 | 7.4 11.7 | 25.3 23.0 | 65.3 106 | 75 110 | 6.6 11.0 | 5.8 9.6 |
| 2424 2430 | 2400×2400 2400×3000 | 17.6 22.0 | 21.4 21.4 | 167 209 | 190 220 | 18.0 22.4 | 15.8 19.6 |
| 2727 2733 | 2700×2700 2700×3300 | 25.4 31.0 | 20.1 20.1 | 250 306 | 260 340 | 27.5 33.7 | 24.1 29.6 |
| 3030 3036 | 3000×3000 3000×3600 | 35.0 42.0 | 18.8 18.8 | 350 420 | 375 450 | 39.5 47.3 | 34.6 41.5 |
| 3236 3242 | 3200×3600 3200×4200 | 48.0 56.0 | 18.0 18.0 | 484 565 | 510 600 | 55.5 65.0 | 48.7 57.0 |
| 3442 3648 | 3400×4200 3600×4800 | 63.5 81.5 | 17.5 16.6 | 655 845 | 700 900 | 75.5 99.0 | 66.0 86.0 |
| 3848 4051 | 3800×4800 4000×5100 | 91.5 108.0 | 16.2 15.8 | 960 1160 | 1000 1200 | 113.0 139.0 | 99.0 122.0 |
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