Dubai Metal Recycling is a new venture of A n M group marking the groups entry into the recycling business.


Aluminium Alloy Production
Aluminium is an element which is 100% recyclable without any loss of its natural qualities.

Recycling involves melting the scrap, a process that requires only 5% of the energy used to produce primary Aluminium from its ore, though around 15% of the input material is lost as dross (ash-like oxide).The dross can further be used to extract Aluminium.
Recycled Aluminium is known as secondary Aluminium, but maintains the same physical properties as primary Aluminium. Secondary Aluminium is produced in a wide range of formats.
Dross from primary Aluminium production and from secondary recycling operations still contains useful quantities of Aluminium that can be extracted industrially.

Secondary Aluminium Alloy Production Using Reverb Furnaces
The scrap of Aluminium is separated into different categories like engine castings, alloy wheels, Aluminium profiles etc. Depending on the specification of required alloys, raw material to be melted is chosen accordingly. The scrap is charged to a Reverb furnace and melted down at temperatures around 750C, to form a "bath". The molten metal is then tested using spectroscopy on samples taken from the melt to ascertain the refinements needed to produce the final cast. After the refinements have been added, the melt is further tested to fine tune the batch to the specific standard. Once the correct composition of metal is reached at, the furnace is tapped and poured into ingot moulds, through a casting machine. The Ingots are then left in open to cool.
Dross is removed and the dissolved hydrogen is degassed. This is typically done with chlorine and nitrogen gas. Hexachloroethane tablets are normally used as the source for chlorine. Ammonium perchlorate can also be used.

Alloys Production at Dubai Metal Recycling Factory LLC.
At Dubai Metal Recycling Factory L.L.C., secondary Aluminium production is done. The type of furnace in operation is a TILTING REVERBERATORY FURNACE having production capacity of 5 Mt / Heat. It is oil fed furnace, using filtered used oil as fuel.
From January 2011, we have added an additional ROTARY FURNACE, which will double our production capacity.
An Ingot casting machine is installed besides the outlet window of the furnace. Molten metal is poured in multiple Ingot casts attached together, moving on a conveyer belt. Water is used as a medium of cooling. By the time each of the casts reaches the opposite end of the conveyer, molten metal solidifies in the shape of Ingots, which are taken out and bundled.
As a measure of exhaust control, we have installed Bag House Filter having 5 compartments and 132 bags. The bags are made up of NOMAX which can withstand temperatures up to 220oC. A blower attached to the hood of furnace blows away fumes and gases, out via a chimney.
Raw material is procured either locally or imported from overseas suppliers. The raw materials generally used are Aluminium scrap wheels, sheet cuttings, engine castings, hard, profiles, sows etc. Small quantities of Manganese flakes and heavy copper are used as well, in some alloys. Apart from this, Silicon is also used to keep up with the required level of silicon in the alloy being produced. In cases where magnesium level needs to be controlled, Lomag is added to achieve the same.
A single heat usually requires 7-8 hour to complete, starting from charging the raw material till the last step, casting. Though this time may vary depending upon how soon the desired composition of alloy is arrived at.
We currently produce (but not limited to) the following alloys.
AC4B, AC2C, AC4C, ADC12, AS12U, LM2, LM6, LM24, HD-4, A383, A356.

The Ingot size specification is as below:
Length: 670 mm
Width: 77 mm
Height: 70 mm

The Bundle size specification is as below:
Weight: 540 Kgs/ bundle +/- 10%
Dimension: 670 mm x 670 mm x 800 mm (height)
Ingot pieces: 92 pieces/bundle = 90+2(Foot ingots)

Packing of Bundles
The Ingots are arranged in bundles before being dispatched. Two foot Ingots are kept at the bottom and on them cross layers of Ingots are arranged one above the other. The bundle is then strapped using Nylon straps. A covering of polythene wrap is placed on the bundle and it is further strapped to ensure a compact packing of the bundle.
These bundles are then dispatched in containers, in case of exports and on trailer, in case of local delivery.
We are smelting over 11,000 Metric Tons annually at this facility which is located at the Sajja Industrial Area, Sharjah.