Specifications and Applications of High Purity Hydrate

Hi Friends,

In present post, we will discuss the broad specifications of high purity hydrate, its production process route and major industrial applications.

High purity hydrate (H.P. Hydrate) is one the special grades of hydrated alumina  primarily used as feed stock for manufacture of synthetic gem bowls.

Product Specifications:

Typical quality specifications of HP grade hydrate are outlined below-

Chemical constituents as impurities:

Fe₂O₃: 0.006% max.

SiO₂: 0.006% max.

Na₂O: 0.23% max.

Particle size analysis:-

Minus 45 microns: over 90%.

Production Process:

High purity hydrate is produced using small stream of pregnant liquor of standard Bayer circuit of alumina. The saturated aluminate liquor is cooled and crystallized in two step precipitation circuit at very stringent process control parameters. Hydrate produced in first step of crystallization is totally discarded and transferred to Bayer circuit of standard alumina. The liquor of the first step precipitators are used as purified liquor containing very lower level of iron and silica impurities. This liquor on crystallization results in production of HP hydrate. The hydrate thus generated is classified, washed, filtered and dried up before packing for transportation. Production of high purity hydrate is possible only in existing Alumina refinery as the main feed liquor is drawn from the existing process stream. Our team has the capability to design, engineer and commission the equipment and facilities for required plant capacity.

Industrial Applications:

High Purity grade hydrate is used for manufacture of synthetic gem bowls for-

 (i)  Ornamental jewelery

(ii) Watch jewels,

(iii) Industrial bearings.

It will be my pleasure to have your views / remarks / comments on above.

Regards.

Kunwar Rajendra