Ashok Mineral Enterprises is one of the major Manufacturers of Kaolin and the quality of Kaolin clay produced is top grade. Different grades of Kaolin (China clay) produced at Ashok Mineral Enterprises is given at the bottom.

Different types of Kaolin :

  • Hydrous Kaolin
  • Calcined Kaolin
  • Crude Kaolin

Hydrous Kaolin:

Hydrous kaolin is formed from Crude/Raw clay by dispersing it in water and centrifuging it to remove impurities. The refined slurry is then dewatered (to reduce soluble impurities) and dried. Water-washed clays are often further treated to improve brightness. This includes chemical bleaching and/or high-intensity magnetic separation to remove iron and titanium impurities.

Calcined Kaolin:

Calcination:

To extract the water molecule and improve color, the hydrous clay is subjected to high temperatures and the process in known as calcination.

The product is termed as calcined clay. By controlling the calcination temperature, Metakaolin (600–800°C) used in concrete, Spinel  – gamma-alumina type structure (925–1050°C) or Mullite Phases (>1050°C) of calcined kaolin can be produced.

Metakaolin has applications in cement, rubber, cables & ultramarine blue industries.

Spinel is used mainly for paint applications as an extender for Titanium Dioxide (TiO2); it also has a few applications for paper, ceramics, polymer and rubber industries.

Mullite is used in the ceramic industry.

KAOLINS ( China clay) at ASHOK MINERAL ENTERPRISES (AME) - Chennai, India :

GRADE : ALFA GLOSS

  • Brightness (ISO) 86.0 % – 90.0 %
  • Moisture 0.0 % – 2.0 %
  • Residue (500 #) 0.0% – 0.10 %
  • pH 5.0 – 6.0 Numbers
  • Oil Absorption 36.0 – 38.0 gm/ 100gms
  • Bulk Density 0.25 – 0.35 gm/cc

GRADE: ALFA KOT-55

  • Brightness (ISO) 86.0% – 91.0 %
  • Moisture 0.0 % – 2.0 %
  • Residue (500 #) 0.0% – 0.10 %
  • pH 4.0 – 5.5 Numbers
  • Oil Absorption 36.0 – 40.0 gm/ 100gms
  • Bulk Density 0.25 – 0.30 gm/cc

GRADE: ALFA KOT-45

  • Brightness (ISO) 75.0% – 90.0 %
  • Moisture 0.0 % – 2.0 %
  • Residue (500 #) 0.0% – 0.10 %
  • pH 5.0 – 6.0 Numbers
  • Oil Absorption 40.0 gm/ 100gms
  • Bulk Density 0.35 gm/cc

CRUDE (RAW) CLAY

GRADE: Commercial clay

GRADE: Pink China clay

GRADE: White China clay – Grade 1

GRADE: White China clay – Grade 2

GRADE: White Micro clay

 

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