Tata Steel

Zinc

ZINC (Dross, Flux Skimming, Ash, Dust) are the by-products which are generated in the process of galvanizing of prime coils.

Zinc Dross

Zinc Dross is a by-product of the galvanizing process that forms as a result of inter-metallic reactions with iron in the bath which gets introduced from the steel parts being coated.

Zinc bath can contain variable amounts of aluminium. Zinc dross (hard zinc) is removed from the bottom of general galvanizing baths (bottom dross), or from the pots of continuous galvanizing lines (top dross).

Applications

  • Zinc Dross is chiefly used to produce ingots which are utilised by galvanizers, mostly in local companies, as the purity is lower than standard material.
  • The other major use of the material is the manufacturing of zinc oxide, which is mainly used in the rubber and tyre industry.

Zinc Ash

In batch galvanizing process, zinc ash is formed on the surface of the galvanizing bath and consists primarily of ZnO with varying amounts of Zn (OH) Cl.

Applications

  • This material is mainly used in the manufacturing of zinc sulphate which is used as a fertilizer (21% zinc and 10% sulphur).
  • There is also a certain % of metal recovery in the material. Ashes are physically separated to produce secondary zinc ingot with the non-metallic fraction used as feed stock, along with the ores, in the production of primary zinc.

Zinc Flux Skimming

These are skimmed from the top of general galvanizing baths.

Applications

  • This material is primarily used as a raw material for manufacturing zinc chloride, which has wide application in battery industry.

Zinc Blowing

In tube galvanizing, a further residue, Zn blowing, is formed as the excess zinc is removed from the surfaces by compressed air.

Applications

  • This material is used as a raw material for manufacturing zinc sulphate, which is primarily used in the manufacturing of fertilizer.

Zinc Dust Ash

Zinc Dust Ash is generated when the Zinc dross is processed to obtain pure Zinc.

Applications

  • This material is used as a raw material for manufacturing zinc sulphate, which is primarily used in the manufacturing of fertilizer.
Tyre manufacturing
Battery manufacturing
Rubber Factory
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