The lead and zinc ore is the mineral ore is rich in metal element of Pb and Zn. The lead and zinc metal are widely use in the electrical industry, engineering industry, military industry, metallurgical industry, chemical industry, light industry, medical industry, etc.. Besides, Lead is also widely used in nuclear industry, petroleum industry.
Table The Average Industrial Index for Lead and Zinc 0re
| Items | Sulfide Ore | Mixed Ore | Oxidized Ore | |||
| Pb | Zn | Pb | Zn | Pb | Zn | |
| Cutoff grade ( ωB) % | 1.3～0.5 | 0.5～1 | 0.5～0.7 | 0.8～1.5 | 0.5～1 | 1.5～2 |
| Minium industrial grade（ωB）% | 0.7～1 | 1～2 | 1～1.5 | 2～3 | 1.5～2 | 3～6 |
| Average grade of deposite(ωB)% | 5～8 | 6～9 | 10～12 | |||
There are more than 250 kinds of lead and zinc ores, however, there are only 17 can be used in the industry. And among these, galena (PbS) and sphalerite ( ZnS) are the most important.
Types of lead and zinc ore:
Galena is the natural mineral form of lead(II) sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals. It is normally with the lead gray color and specific gravity is 7.2-7.6 and the mosh scale hardness is 2.5-2.75.
Table: Quality Standard for Lead Concentrate:
| Product Level | chemical analysis % | |||||
| min content of Pb (%) | impurity content ≤ % | |||||
| Cu | Zn | As | MgO | Al2O3 | ||
| Grade I | 65 | 1.2 | 4.0 | 0.3 | 1.0 | 2 |
| 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 |
Sphalerite ((Zn,Fe)S) is a mineral that is the chief ore of zinc. It consists largely of zinc sulfide in crystalline form but almost always contains variable iron. It is usually found in association with galena, pyrite, and other sulfides along with calcite, dolomite, and fluorite. It always occurs with brown, yellow, red, green or black color. Its specific gravity is 3.5-4 and the mosh scale hardness is 3.9-4.2.
Table: Quality Standard for Zinc Concentrate:
| Product Level | chemical analysis % | |||||
| min content of Zn (%) | impurity content ≤ % | |||||
| Cu | Pb | Fe | As | SiO2 | ||
| Grade I | 55 | 0.8 | 1.0 | 6.0 | 0.2 | 4.0 |
| Grade II | 50 | 1.0 | 1.5 | 8.0 | 0.4 | 5.0 |
| Grade III | 45 | 1.0 | 2.0 | 12.0 | 0.5 | 5.5 |
| Grade IV | 40 | 1.5 | 2.5 | 14.0 | 0.5 | 6.0 |
The Solution for processing lead and zinc ore:
According to the different natures of different ores, the dressing test methods are not the same.
For sulfide type ore: Flotation process
For oxide type ore: Flotation process, gravity separation process
Common equipment
PEW Jaw Crusher, HP Cone Crusher, HST Cone Crusher, S series cone crusher, vibrating screen
Ball mill
Hydro cyclone, spiral classifier
SF Series Flotation Cells
BF Series Flotation Cells
XCF-KYF Series Flotation Cells
