| Analysis of the Three-Cs: Content, Characteristics, Contaminants. |
|
 |
Zinc Oxide
French/American Process
80% Zinc – 100% Zinc Oxide
Quality Concerns:
| Content |
|
| • Major elements |
Zn |
| • Minor elements |
Zinc Metal |
| |
|
| Characteristics |
|
| • Flow-ability/Segregation |
Sticky |
• Mix-ability/
Proper Dispersion |
Sticky |
| |
|
| Contaminants |
|
| • Heavy Metals |
Pb, Cd, As, Hg |
| • Dioxin |
Moderate |
|
 |
Zinc Oxide
Waelz Kiln Process
72% Zinc – 91% Zinc Oxide
Quality Concerns:
| Content |
|
| • Major elements |
Zn |
| • Minor elements |
Zinc Metal, Fe, Mn, Ca, Si, Al |
| |
|
| Characteristics |
|
| • Flow-ability/Segregation |
Very Dense |
• Mix-ability/
Proper Dispersion |
Very Dense |
| |
|
| Contaminants |
|
| • Heavy Metals |
Pb, Cd, As, Hg |
| • Dioxin |
Moderate |
|
Product samples rejected by DQA analysis for poor quality; not meeting Prince Specifications.
Zinc Oxide
Poor Quality |
Industrial By-Product
79% Zinc
80% Zinc Oxide
15% Zinc Metal |
Washed Sample
Magnification = 46x
Product rejected: metal particles in sample
|
Zinc Oxide
Poor Quality |
Spent Catalyst
67% Zinc
83% Zinc Oxide
4% Carbon
3% Copper
Copper in sample, potentially toxic to sheep
|
Chemical By-Product
61% Zinc
76% Zinc Oxide
10% Sulfur Compounds
3.8% Aluminum Oxide
Product rejected |
|
