© Ultromex Limited 2017

 Mersey Wharf Business Park

 Dock Road South

 Bromborough, Wirral CH62 4SF

 Tel: 0151 203 8377

 Email: sales@ultromex.com

 Registered in England

 Company no 07661552

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Aluminum Salt Slag Recycling Technology

Ultromex provides patented solutions to the Aluminum Smelting Industry. Our technology is the most effective method for smelters who want in-situ aluminum salt slag recycling & treatment to recover valuable metals and flux salts.

Why Ultromex?

Ultromex has assembled a team of problem solvers from the metals recovery and recycling industry plus engineering and chemical industries to develop the first truly end to end solution for aluminum salt slag treatment.

Sending your salt slags & drosses to third parties for recycling & treatment is expensive and not sustainable. Ultromex’s technology means that you can treat your salt slag on site on not be reliant on expensive third parties to do this for you. You recover and keep the value from the aluminum and expensive salt flux in the slag.

Take control

Keep your valuable metals for re-melt     

Keep your expensive flux salts to use again

Avoid treatment & transportation fees

Eliminate costs - increase efficiency

Increase profits

Environmentally sustainable

Why Ultromex?

Ultromex has assembled a multi-disciplinary team to crack once and for all the challenges presented by aluminium salt recycling for smelters.

Expert chemists and chemical engineers

Materials recovery & recycling specialists

Highly experienced in house plant design team

Consulting and analytical services

UK based, worldwide capability

Plants in the UK & Iceland

Cost effective chemical treatment plant recovers salt and removes nitrides & fluorides leaving valuable inert by-products.

Small foot print plant using novel state of the art technology to cleanly liberate metal from slags & drosses.

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Metal liberated cleanly from slag

Spent Pot Liners

We have a new patented solution for treating Spent Pot Liners. This exciting new technology is being brought to market and represents a step change for smelters who are struggling to deal with this hazardous waste stream.

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We welcome Nick Loftthouse to the team. Nick is an experienced chemist with a background in recycling and remediating difficult waste streams.  

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Our facilities

Our UK base has dedicated laboratories for analytical work and we also have a small scale demonstration plant operating in our factory .

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What is Salt Slag?

Salt slag is a waste material generated by secondary aluminium processing (the recycling and smelting of new aluminium from scrap, aluminium dross and other wastes).

Due to the nature of the contaminants it contains, salt slag (or salt cake as it sometimes known) is classed as a hazardous waste in most countries and banned from landfill. Disposing of the waste in an environmentally sustainable and cost effective way is a major challenge for the aluminium smelting industry.

How is it created?

The most common types of furnace used by the secondary aluminium industry are rotary or reverbatory furnaces. In these furnaces scrap aluminium is melted under a bath of molten salt flux which floats on the surface of the molten metal. The salt flux is a mixture of sodium chloride and potassium chloride, often with small amounts of fluorides (Cryolite).

Aluminium has a tendency to oxidize with the heat of the furnace so the salt provides an effective cover for the metallic aluminium, minimizing losses to oxidization and increasing metal recoveries. The fluoride in the salt helps break down oxide layers already on the surface of the scrap and so helps to improve separation between the aluminium and non-metal contaminants.

The molten metallic aluminium is tapped from the furnace and the last bit, where it meets the salt layer, contains some residual aluminium metal, plus various metal oxides (mainly aluminium oxide) and the salts. This mixture solidifies and cools to become salt slag; sometimes known as salt cake or black dross.

What to do with salt slag waste?

Historically, salt slag was land filled but this has caused a number of problems, including salt and other contaminants leaching into the water course and (being exothermic on contact with water) causing underground fires. As environmental awareness and regulations have developed, landfill of salt cake has been banned in many countries and the options for disposal have become a major issue for the industry. Salt slag processing and treatment for recycling is now the only sustainable option.

Ultromex treatment technology

Allows secondary smelters to process and recycle their own salt slag wastes as they arise, recovering the small amount of trapped metal to re-melt, recovering the salts to use again and with the residual aluminium oxides becoming a useful feedstock for other industries and – crucially – leaving zero waste for landfill.