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Classification of Clay
- Aug 21, 2018 -

1. Refractory clay

This is a siliceous clay rich in hydrated aluminum silicate. It has the ability of non-deformation, non-fragmentation, non-softening and non-paste at high temperature. Low iron, calcium and alkali metals are close to kaolin in composition, and the better grade after calcining contains at least 35%Al2O3 (dictionary of mining terms, compiled by the geological society of America).

2. Flint clay

A smooth, flint-like refractory clay rock, consisting mainly of kaolinite, with a seash-like section of cleavage, resistant to ripening in water. Milling in water for long periods of time produces plasticity (dictionary of mining terms, geological society of America).

3.Fire-resistant soil.

It is a part of a mixture used in the production of refractory bricks. It consists of calcined clay or reground bricks, also known as clinkers.

4.Clays

This is mainly made up of (hard) hydrometeorite. The bauxite > mechanipore consists of refractory clays bonded to the material. The purest hydralite clay often contains 70-80% Al2O3 after calcining.

5.Intensive Chinese clay

Soft clay, refractory clay and kaolin: <45% Al2O3

Flint clay, kaolin and high alumina ore: >45%Al2O3

High alumina clay clinker (also known as "ripe bauxite") : 75-90%Al2O3

All components of raw refractory clay ground to appropriate fineness, as with calcined refractory clay or crushed refractory clay bricks, or both