Scrap Zinc Recycling
If you wish to Buy or Sell Zinc Scrap, simply
ADD your inquiry
to the Inter-Continental Metal Exchange.
The exchange service has been successfully matching interested parties on-line since 1995.
If you wish to receive unique trade benefits for zinc scrap, please check-out the enhanced
Trader Access service.
Separating scrap Zinc into the different
Grades & Specifications
will allow you to yield the best
value
for your scrap materials.
Zinc Recycling Information
For anyone seeking current information or research data on the zinc recycling industry,
you may access and ask your
Recycling Questions
to a core group of experienced and knowledgeable recycling industry professionals.
Zinc Die Cast Scrap
Zinc is commonly injection molded or die cast under pressure in order to form integrate shapes and configurations.
The collection and separation of
Old Zinc Die Cast Scrap
from
New Die Castings
or
Plated DieCast Scrap
(typically nickel plated) from
Irony DieCast Scrap
Zinc Borings
The collection of
Zinc Borings,
grindings or turnings from machining operations that may typically be saturated with
cutting oils
that require specialized material handling to contain the liquids.
Some recyclers densify or briquette the turnings to remove or reduce the free flowing oils,
some use centrifuge filtration and
others use natural gravity drainage dumping floor containment and collection systems.
Irony Zinc Recovery
Assorted zinc and zinc die cast scrap contaminated with iron attachments or bolts & screws,
which are difficult to separate manually, are classed together and referred to as
Irony Zinc.
The value of irony zinc scrap is based on the percentage of recoverable zinc.
One method of recovery of irony zinc scrap is achieved by melting the iron contaminated scrap in a sweat furnace
at a temperature that allows the zinc to melt while the steel remains solid.
The sweat furnace method is an efficient method of separating or recovering the
Remelted Zinc.
An alternative method of recovering clean
zinc scrap
from irony die castings is with the use of an impact shredder and magnetic separation to segregate the liberated zinc fragments.
Remelt Zinc Ingot
Iron free remelted Die Cast blocks recovered from sweat furnace operations are referred to as
Remelt Zinc Ingot.
These ingot blocks, uniform in shape, commonly called pigs are free of dross or slag materials
and range in weight from a minimum 25 lbs. to a maximum 75 lbs. each.
Large slabs or big pigs of recovered iron free Die Cast called
Remelt Zinc Sows
are uniform size and shape that range in weight from 500 lbs. upto a maximum 2,500 lbs.
and are free of dross or slag materials.
Galvanizing
In an attempt to slow the oxidization or rusting of many outdoor steel products a coating of zinc is applied
to the surface of the products in a process known as Galvanizing.
During the Galvanization process a byproduct referred to as dross is generated.
Top Dross
refers to the skimmings that float to the top of the zinc galvanizing bath and
Bottom Dross
refers to the heavier material that sinks to the bottom of the bath.
Recyclers reprocess the dross materials to recover zinc and
Zinc Oxides.
Zinc Flue Dust
Material referred to as
Zinc Flue Dust
may be recovered as a by-product from galvanized steel recycling.
At the End of Life (EOL) of the galvanized steel products, during the remelting process, the residual zinc
is driven off in the furnaces and collected in the pollution control systems,
this material is also referred to EAF (Electric Arc Furnaces) dust.
Electric Arc Furnace
EAF Dust
| Symbol | Item Name | Range % |
| ZnO | Zinc & Zinc Oxide | 20-32% |
| Fe2O3 | Iron & Iron Oxide | 22-36% |
| MnO | Manganese Oxide | 3-4% |
| PbO | Lead Oxide | 4-7% |
| CaO | Calcium Oxide | 16-26% |
| Al2O3 | Aluminium Oxide | 1-12% |
| SiO2 | Silicon Dioxide | 1-9% |
| MgO | Magnesium Oxide | 1-4% |
|
Scrubber Residues |
Potassium K2O,
Chlorine Cl2 |
5-19% |
|
Trace Elements |
Mixed Heavy Metals | 0.5-7.5% |
| LOI | Loss on Ignition | 0.5-11% |
Zinc Dross Recovery
The recycling of metallic zinc from slag, skimmings or spillings from zinc die cast melting operations
is referred to as
Zinc Dross
recovery and typically crushing and screening or
Remelting
the Zinc solids to remove the
Zinc Residues.
Galvanizing
is also a key source of zinc dross.
Zinc Oxide & ZnO Residues
Zinc Oxide (ZnO) is recovered from a variety of zinc wastes, byproducts and waste steams.
Zinc Residues
Zinc Oxide & ZnO Residues are collected from assorted sources that contain zinc or zinc oxide powders, dusts or residues.
Purified
Zinc Oxide
is a sought after raw chemical feed stock for numerous industrial processes.
Zinc Smelter Residues
