1 Introduction and Motivation
2 Electrostatic Separation
3 Characterization of the Raw Magnesite Sample
MgO | CaO | SiO2 | R2O3 | Acid insoluble components | Loss in ignition |
---|---|---|---|---|---|
[%] | [%] | [%] | [%] | [%] | [%] |
36.1 | 2.5 | 13.0 | 2.1 | 19.5 | 40.9 |
4 Experimentation
4.1 Experimental Setup
4.2 Experimental Design
4.3 Machine Settings for the Separation of Raw Magnesite
Test number | Belt speed | Gap between the electrodes | Applied voltage | Polarity of the top electrode | Feed rate |
---|---|---|---|---|---|
[fps] | [mm] | [kV] | (+/−) | (1–10) | |
1 | 17.0 | 9 | 3 | (−) | 10 |
2 | 17.0 | 9 | 6 | (−) | 5 |
3 | 35.2 | 9 | 3 | (−) | 5 |
4 | 35.2 | 9 | 6 | (−) | 10 |
5 | 17.0 | 14 | 3 | (−) | 5 |
6 | 17.0 | 14 | 6 | (−) | 10 |
7 | 35.2 | 14 | 3 | (−) | 10 |
8 | 35.2 | 14 | 6 | (−) | 5 |
9 | 17.0 | 9 | 3 | (+) | 5 |
10 | 17.0 | 9 | 6 | (+) | 10 |
11 | 35.2 | 9 | 3 | (+) | 10 |
12 | 35.2 | 9 | 6 | (+) | 5 |
13 | 17.0 | 14 | 3 | (+) | 10 |
14 | 17.0 | 14 | 6 | (+) | 5 |
15 | 35.2 | 14 | 3 | (+) | 5 |
16 | 35.2 | 14 | 6 | (+) | 10 |
5 Results and Discussion
Yield | Grade—MgCO3 | Recovery—MgCO3 | |
---|---|---|---|
[%] | [%] | [%] | |
Concentrate | 78.9 | 97.9 | 90.7 |
Tailings | 21.1 | 33.7 | 9.3 |
Feed | 100.0 | 76.5 | 100.0 |
Belt speed | Gap between the electrodes | Applied voltage | Polarity of the top electrode | Feed rate |
---|---|---|---|---|
[fps] | [mm] | [kV] | (+/−) | (1–10) |
35.2 | 14 | 6 | (+) | 10 |