Mica
A group of minerals having perfect basal cleavage and capable of splitting into thin laminae is called mica. Chemically they contain complex silicate of aluminium and alkalies with hydroxyl.
Taking the advantage of large reserve and mining capacity of muscovite mica mine, Chenxing company has been producing mica products since early 1960, our products have been sold to USA, South Korea, Japan, Europe and are widely applied in the fields:
- Automotive
- Paints and coating
- Plastics
- Plasterboard and joint compounds
- Pearlescent pigment
- Rubber
- Drilling
- Brake pad & clutches
Dry Ground Muscovite Mica
- Quick View
- Muscovite Mica
- Specific Gravity 2.6
- Refractive Index 1.58
- MOH hardness 2.5
- pH value 6.5-7.5
| Commodity | Definition | Size |
|---|---|---|
| Raw materials | Mica scrap | 8-20mesh |
| Dry | Building | 20mesh |
| 40mesh | ||
| 60mesh | ||
| 80mesh | ||
| Mica | materials | 100mesh |
| 16-30 mesh | ||
| Powder | 40-100 mesh | |
| Series | Plastic | 60mesh |
| 100mesh | ||
| 200mesh | ||
| Grade | 325mesh | |
| 400mesh | ||
| 600mesh |
Dry Ground Muscovite Mica (Typical Grade Datasheet)
| Size Properties |
20 mesh | 60mesh | 100mesh | |||
|---|---|---|---|---|---|---|
| Mesh and percentage | mesh | % | mesh | % | mesh | % |
| Particle distribution | +20 | <5 | +60 | / | +100 | / |
| -20 / +40 | 70±5 | -60 /+100 | 55±5 | -100 /+200 | 35±5 | |
| -40 / +60 | 25±5 | -100 / +200 | 40±5 | -200 / +325 | 25±5 | |
| -60 / +100 | <10 | -200 / +325 | <5 | -325 | <45 | |
| -100 | <5 | +325 | / | / | / | |
| Moisture content | ≤0.5% | ≤0.5% | ≤0.5% | |||
| Impurity | ≤1.0% | ≤1.0% | ≤1.0% | |||
| Color | Silver white | |||||
| Chemicals | SiO2 | Al2O3 | Fe2O3 | K2O | Na2O | MgO | CaO | L.O.I |
| Content | 44.30% | 31.21% | 5.74% | 10.58% | 1.17% | 0.62% | 0.57% | 4.97% |
| Ratio of diameter to thickness | Loose density | Whiteness | Refractiveindex | Density | pH value |
| 1:30 | <0.30g/cm3 | 70 | 1.58 | 2.8 g/cm3 | 6.5-7.5 |
Scrap mica is ground by three processes, namely dry grinding, wet grinding and micronising. The marketed product is classified according to the grinding process which indicates quality and properties like colour, mesh size and bulk density. Dry mica powder is prepared by grinding in high speed hammer mills. The edges of the flakes get crushed and powdered mica is produced which gives the appearance of flour. Wet-ground mica is produced by grinding in water involving preferential delamination of flakes. Churn mills, with large wheels or rollers rotating on horizontal shafts are used for this purpose.
Wet Ground Muscovite Mica
| Commodity | Definition | Size |
|---|---|---|
| Wet | High | 100mesh |
| 200mesh | ||
| Ground | Class | 325mesh |
| 400mesh | ||
| 600mesh | ||
| Mica | Cosmetic grade | 1250mesh |
| 2000mesh | ||
| Series | Pearl luster | Coarsely superfine |
| Finely superfine |
Wet Ground Muscovite Mica (Typical Grade Datasheet)
| size | 100 mesh | 200 mesh | 325 mesh | 400 mesh | 500 mesh | 600 mesh | 800 mesh | 1000 mesh |
|---|---|---|---|---|---|---|---|---|
| Residue % | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤10.0 | ≤10.0 | ≤10.0 |
| Fe content ppm | ≤800 | ≤800 | ≤400 | ≤400 | ≤300 | ≤300 | ≤300 | ≤300 |
| Impurity % | ≤1.0 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| Loose density g/cm3 | ≤0.3 | ≤0.25 | ≤0.25 | ≤0.22 | ≤0.22 | ≤0.22 | ≤0.22 | ≤0.22 |
| Moisture:% | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| Whiteness° | >75 | >75 | >75 | >80 | >80 | >80 | >80 | >80 |
| Ratio of diameter to thickness | >60 | >60 | >60 | >60 | >60 | >60 | >60 | >60 |
Phlogopite Mica
- uick View
- Phlogopite Mica
- Specific Gravity 2.6
- Refractive Index 1.58-1.64
- MOH hardness 2.5-3
- pH value 6.5-7.5
| Definition | Commodity | Size |
|---|---|---|
| Phlogopite mica | 8-16mesh | |
| Phlogopite | Phlogopite | 16-20mesh |
| 20-40mesh | ||
| series | Mica powder | 40-80mesh |
| 80-100mesh | ||
| 200-325mesh |
