Hammer Crushers
Types of Hammer Crushers Since its introduction in 1924, the hammer crusher…
Lead concentrate is classified into four grades based on its chemical composition: Grade 1, Grade 2, Grade 3, and Grade 4. The chemical composition of lead concentrate should meet the following requirements. The provisions of Table 5-4 apply.
| Table 5-4 Lead concentrate chemistry Element unit:% | ||||||
| Taste class | Chemical composition (mass fraction) | |||||
| Pb≥ | Impurity content ≤ | |||||
| Cu | Zn | As MgO Al ₂ O ₃ | ||||
| Grade A | 65 | 1.2 | 4.0 | 0.3 | 1.0 | 2.0 |
| Grade II | 60 | 1.5 | 5.0 | 0.4 | 1.5 | 2.5 |
| Grade III | 55 | 2.0 | 6.0 | 0.5 | 1.5 | 3.0 |
| Grade IV | 45 | 2.5 | 7.0 | 0.7 | 2.0 | 4.0 |
Zinc concentrate is classified into four grades based on its chemical composition: Grade 1, Grade 2, Grade 3, and Grade 4. The chemical composition of zinc concentrate should meet the following requirements. The provisions of Table 5-5 shall apply.
Table 5-5 Chemistry of Zinc Concentrate Element
unit:%
| Taste class | Chemical composition (mass fraction) | |||||
| Zn≥ | Impurity content ≤ | |||||
| Cu | Pb | Fe As SiO₂ | ||||
| Grade A | 55 | 0.8 | 1.0 | 6 | 0.2 | 4.0 |
| Grade II | 50 | 1.0 | 1.5 | 8 | 0.4 | 5.0 |
| Grade III | 45 | 1.0 | 2.0 | 12 | 0.5 | 5.5 |
| Grade IV | 40 | 1.5 | 2.5 | 14 | 0.5 | 6.0 |
