Aluminium Dross Recycled into Fertilizer in New Zealand

Sponsored by
27 October 2011

Taha Asia Pacific Ltd, the New Zealand subsidiary of Bahrain based Taha International Corporation has opened a new Aluminium Dross recycling facility in Bluff, New Zealand.

Dross is a mass of solid impurities floating on a molten metal. It is not entirely waste material; aluminium dross, for example, can be recycled and is used in secondary steelmaking for slag deoxidation.

Taha claims to have developed an environmentally sensitive, efficient, and cost-effective process to separate aluminium from dross, and produce fertilizer from the aluminium oxide residue.

To achieve this, the company says that it employs a Hot Dross Processing System, whereby the majority of metal is recovered without the need for additional energy or additives. The depleted dross is separated by mechanical means - a process which extracts fine metal particles. What remains is a high grade mineral, known as aluminium oxide.

The extracted metal is then processed even further in a specialised furnace to ensure that the client receives the highest possible return. According to Taha, hot dross processing saves energy and greatly increases metal recovery without the use of toxic chemicals and salts.

The aluminium oxide is then converted into various products but it is mainly used in the manufacture of mineral fertilizer, that the company says already has international approvals and certification in Germany and the European Union.

The facility has begun processing dross that the smelter produces, as well as treating dross that is stored in landfill. What remains is high-grade aluminium oxide, which is further processed by another company, Taha Fertilizer Industries, which converts it into mineral fertilizer.

Taha Fertilizer Industries is scheduled to begin operations in November. According to the company, it will test and analyse fertilizer blends, and will create custom product to suit individual crops and locations.


Read More

Chemicals from Biowaste Thermal Oxidation Piloted in New Zealand
A pilot plant that will test an innovative process that converts biosolid waste into valuable chemical products has been opened in New Zealand's Rotorua district council's Wastewater Treatment Plant by Scion Research.

Waste Gases to be Recycled into Aviation Fuel
UK based airline, Virgin Atlantic has teamed up with New Zealand's low carbon fuel specialist, LanzaTech, to develop aviation fuel from waste gases from the steel industry.

Wet or Dry Separation?
Materials separated from the residue of household waste incineration can be used in construction and metals production, thereby increasing recycling and reducing the need for production of ‘new’ substrates. Lenka Muchovà and Peter Rem report.



     

Free Magazine
waste management world magazine sign up
Subscription





   
Free Email
Waste Management World Newsletter
Newsletter

  
     



Sponsored by

Did You Like This Article?

         Subscribe to Waste Management World today to receive the latest information on biological waste treatment, collection and transport, recycling and waste minimization, sanitary landfill, thermal treatment of waste, and much more.