Product : Zinc ash

Zinc ash is a raw material used for the preparation of micro nutrients for the soil. These are soil conditioners. See how zinc ash is generated in the industry.

What is zinc ash?

• Zinc ash is oxidised zinc that forms on the surface of molten zinc metal.

• The ash (see photo) consists of a powdery material (the ash proper) and solid metallic pieces of an irregular shape.

• There are other products called zinc dross, zinc skimmings, zinc top dross or zinc oxide. In the galvanising industry, the term zinc ash prevails and is widely used.

Where does it come from?

• Zinc ash usually arises from hot dip galvanising or other zinc coating processes.

• The ash is removed from the top of galvanising baths by skimming or straining.

Where does it go?

• There are several major companies that process or recycle zinc ash.

• Some companies mechanically separates the metallic zinc from the ash.

• Another one blends the zinc ash to make agricultural grade zinc oxide.

• The metallics are re-used in galvanising and other processes.

• Some others smelts both processed ashes and unprocessed ash to recover the zinc in metallic form.

• Export or import of zinc ash without a permit contravenes the Hazardous Waste (Regulation of Exports and Imports) Act of India .

Is it hazardous? 

                        • Zinc ash frequently contains lead at concentrations that make it hazardous to humans, other animals and plants.

• Refer to the pollution control central or state boards for designated hazardous substances.

• Lead can leach out of zinc ash into the environment and there are tests which may be used to determine whether or not this may happen in particular circumstances.

• Work-place controls are required in factories that recycle and process zinc ash.

Click on link to open/print. Rockfert zinc ash

You can find in the attachment zinc ash specifications that Rockfert can arrange for you. Specifications are well within the domestic guidelines issued by the Pollution control Board of India.