Anode slimes is a by-product of the electro-refining process and consists of the insoluble impurities from the anode that fall to the bottom of the refining cell. The anode slimes are recovered from the refining cells, dried in an oven and processed by a metals by-product plant.


The principle insoluble impurities are Silver (Ag), Arsenic (As), Gold (Au), Bismuth (Bi), Lead (Pb), Antimony (Sb), Selenium (Se) and Tellurium (Te).


Safety Data sheets


Materials Safety Data Sheet MSDS

Trade name


Orders for material under this specification should include the following information.

  • Anode Slimes
  • Anode Slimes produced from the Palabora electrolytic copper refinery.


Typical chemical components


The approximate chemical composition of the slimes currently produced is as follows, but the metal contents are subject to variation:

 Anode Slime
 Element  Assays  STDEV  Units
 Cu  35.8  9.8  %
 Ni  0.9  0.7  %
 Se  0.5  0.1  %
 Te  0.4  0.1  %
 As  365  103  %
 Au  1697  387  ppm
 Ag  28325  5940  ppm
 Pt  70  24  ppm
 Pd  74  25  ppm
 Rh  -  -  ppm
 Pb  0.03  0.1  %
 Sb  -  -  %
 Bi  0.01  0.0  %
 Acid Insol.  -  -  %
 Water Insol. SO4  -  -  %
 Water Insol. Cu  -  -  %
 Free H2SO4  -  -  %


Product specification


Moisture per batch > 4% to < 20%

Packing and shipping


The Slimes are packed in 210 litre steel drums with plastic liners, typically containing between 220 kg and 380 kg per drum. The average drum holds 295 kg's slimes. Drums are sealed using a butt-welding clamping lid. Shipment is effected from South African ports.



Delivery is based on a "C.I.F. named overseas ports" delivery basis, prescribing that the property in the material shall pass to the Buyer on delivery of the original shipping documents from the Seller to the Buyer. The Risk shall pass to the Buyer when the anode slimes pass the ship's rail on loading at a South African port. In the event of the ship owner exercising any right under the Bill of Landing to discharge at any other convenient port or ports of any other country or countries, such discharge shall constitute good delivery and the Buyer shall pay any additional freight and charges as may be incurred to deliver material to the Buyer's works.