Lago Llanquihue 0491
San Bernardo
Santiago, CHILE
Phone: (56-2) 854 1111
Fax: (56-2) 854 1100
info@suinco.cl

 

 

Mould  Coating  Material Comparison
If you are using Barite as mould coating for the casting of your copper anodes, we can assure you that a change to EXTRAMOULD coating will provide you better finished anodes that your electrolytic refinery customer should appreciate. Moreover, the change will bring your smelter economic and operational benefits.
Please keep in mind that Barite is widely used in many smelters basically due to its easy accessibility and low price in a per kg based criteria NOT for its global benefits. A Bone Ash based mould coating , like EXTRAMOULD , is the best material known for this purpose, as you can see in the following facts. 
 
Characteristic
Unit
EXTRAMOULD
Semi-SyntheticBone Ash
Barite 
Barium Sulfate
Clay
Kieselguhr
Consumption rate.
This rate x coating price determines the coating cost of a molded Ton
Kg /molded Ton
0.6 ? 0.7
1.5 ? 2.5
0.7
Mould Life expectancy.
Dressing material helps to protect the moulds.Higher mould life represents less moulds used, lower copper costs and more smelting capacity
Molded Tons
800 - 2.000
300 - 400
300 - 500
Density.
Lower densities mean easier material handling and a much more homogeneous mixing
gr/cc
1.1
1.5
0.7
Anode finishing.
Better anode  finishing  implies a lower anode rejection rate and a better refinery acceptance		  .
Very good
Acceptable
 Marginal
Anode Porosity  .
Low
High
Very high
Anode Impregnation.
An anode impregnated with mould coating represents a potential problem at the refinery due to electrolyte contamination		 .
Very low
Very high
High
Residues at Refinery.
Unwanted due to pipe clogging, filter  and pump damage, settling on  tanks.		 .
Very low
Very high
Very high
Operational Tolerance.
Related with molten copper chemistry, copper  and mould temperature and refrigeration		 .
Very high
Very low
Low
Silica Content.
Lower silica content represents lower health hazard  (silicosis)
%
0.45
3.0 - 8.0
90.0