Precision instrument polishing and spraying with brown corundum 60 mesh, 820 mesh, 100 mesh 120 mesh
Brown corundum is made of high-quality bauxite, iron filings, anthracite smelting in the arc at high temperature, crushed and shaped by self-mill, magnetic separation and iron removal, sieving into a variety of particle sizes, the main chemical component is Al2O3, its content is 92%–97%, and contains a small amount of Fe, Si, Ti, etc. Its texture is dense, high hardness, tan, toughness, grain formation of spherical shape, suitable for the manufacture of ceramics, resin high consolidation abrasives and grinding, polishing, sandblasting, precision casting, refractory materials, etc.
| Brown corundum physical properties | |||||
| color | brown | ||||
| Mohs hardness | ≥8.9 | ||||
| Crystal form | Trigonal crystal system | ||||
| melting point | 2250℃ | ||||
| Maximum operating temperature | 1900℃ | ||||
| specific gravity | 3.95 | ||||
| Bulk density | 1.53-1.99g/cm³ | ||||
| True density | ≥3.90g/cm³ | ||||
| Chemical indicators and models of brown corundum | |||||
| granularity | chemical composition | specification | |||
| Inthe2Or3 | SandOr2 | He2From3 | Ten2 | ||
| Segment sand | ≥95 | ≤1.5 | ≤0.5 | ≤3 | 0-1/3/5/8mm |
| Fine powder | ≥92 | ≤2 | ≤0.55 | ≤3.3 | 0-100/200/300/325# |
| grain size sand | ≥95 | ≤1.5 | ≤0.5 | ≤3 | 8-220# |
| Micropowder | ≥92 | ≤2 | ≤2 | ≤4 | W63-W0.5 (“W” mark) |
| F230-F1200 (“FEPA” mark) | |||||
| 240#-3000# ( “JIS” mark) | |||||
| Brown fused alumina is called the tooth of industry: it is mainly used in refractory materials, sandblasting and grinding surface treatment , consolidated abrasives , coating molds, etc. 1. Used in the manufacture of high-grade refractory materials, castables, refractory bricks, etc. 2. Sandblasting — the abrasive has moderate hardness, high bulk density, no free silica, high specific gravity, and good toughness. It is an ideal ” environmental protection ” sandblasting material, widely used in aluminum profiles, copper profiles, glass, and washed jeans Precision molds and other fields; 3. Free grinding — grinding grade abrasives, which are used in free grinding in the fields of picture tubes, optical glass, single crystal silicon, lenses, watch glass, crystal glass, jade, etc. It is a high-grade grinding material commonly used in China ; 4. Resin Abrasives – Abrasives with suitable color, good hardness, toughness, suitable particle section type and edge retention, applied to resin abrasives, the effect is ideal; 5. Coated Abrasives – Abrasives are sandpaper , gauze and other raw materials for manufacturers; 6. Functional filler – mainly used for automobile brake parts, special tires, special construction products, etc., and can be used as wear-resistant materials for building highway pavements, airstrips , docks , parking lots , industrial floors , sports venues, etc .; 7. Filter medium —— a new application field of abrasives. Granular abrasives are used as the bottom medium of the filter bed to purify drinking water or waste water. It is a new type of water filter material at home and abroad, especially suitable for non-ferrous metal beneficiation: oil drilling mud weighting agent : 8. Hydraulic cutting —— Using abrasives as the cutting medium, relying on high-pressure water jets for basic cutting, it is applied to the cutting of oil (natural gas) pipelines, steel and other components. It is a new, environmentally friendly and safe cutting method . | |||||
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