Raw Materials & Fuel Requirement For Pidgeon Process Magnesium Production
Date：2021-01-03 Source：zk corp Views:
1. Dolomite
See Diagram 1 for the chemical composition of Eczacibasi Esan’s dolomite sample (Based on the Report of Dolomite Composition Analysis and Processing Test of Eczacibasi Esan)
Diagram 1: Chemical composition of dolomite sample
|
MgO |
CaO |
SiO2 |
TiO2 |
Al2O3 |
Fe2O3 |
Na2O |
K2O |
Zn |
SO3 |
MnO |
P2O5 |
L.O.I |
|
21.11 |
30.78 |
0.24 |
0.016 |
0.02 |
0.016 |
0.024 |
0.006 |
0.0004 |
0.036 |
0.0042 |
0.010 |
46.71 |
The size of dolomite shall be within 10～50mm before input into the pre-heater.
2. Ferrosilicon
The size of Ferrosilicon shall not be more than 100mm when transported into factory. And the chemical composition shall comply with Diagram 2.
Diagram 2: Chemcial composition of Ferrosilicon
|
Si |
Al |
P |
S |
Mn |
|
≥75 |
≤1.5 |
≤0.035 |
≤0.02 |
≤0.4 |
3. Fluorite
Fluorite bought from outside shall be packed in bags when transported into the factory. The size of -200 mesh shall be more than 95% (-0.074mm＞95%); The chemical composition of fluorite shall comply with Diagram 3.
Diagram 3: Chemical composition of fluorite.
|
Composition |
CaF2 |
CaCo3 |
SiO2 |
H2O |
|
% |
≥95 |
≤3 |
≤1 |
＜1 |
4. Fuel
Both rotary kiln and reduction furnace are fired by natural gas, while refining process by electricity.
Calorific value of natural gas: ≈8250kcal/Nm3. See Diagram 4 for chemical composition.
Diagram 4: Chemical composition of natural gas
|
CH4 |
C2H6 |
C3H8 |
C4H10 |
CO2 |
O2 |
N2 |
H2S |
Other Carbons |
|
min |
max |
mxs |
msx |
max |
max |
msx |
max |
max |
|
82% |
12% |
4% |
2.5% |
3% |
0.5% |
5.8% |
5.35mg/m3 |
1% |
5. Solvent
Mg crystal after reduction shall be refined in chloride solvent. High quality Mg can be obtained after removing the metal and non-metal impuritiesl.
See Diagram 5 for list of solvent used in crude Mg refining.
Diagram 5: List of solvent used in crude Mg refining
|
Type of solvent |
|
Basic solvent (2# Calcium solvent) |
|
Refining solvent |
|
Power solvent (Covering solvent) |
|
New solvent |
