--〉General grade
They are made from magnesite (MgO≥40%). They are firedusing metallurgical coke as fuel in vertical furnaces of high temperature. Allthe brands of metallurgical clinker and making brick clinker are highlywelcomed by users.
| Brand |
Chemical composition (%) |
Size
(mm) |
MgO≥ |
SiO 2 ≤ |
CaO≤ |
L.O.I.≤ |
Bulk density≥ (g/cm 3 ) |
DDM-93 |
93 |
3.5 |
1.6 |
0.3 |
3.18 |
0-10
3-120
5-120
10-120 |
DDM-92 |
92 |
4.0 |
1.6 |
0.3 |
3.18 |
DDM-91 |
91 |
4.5 |
1.6 |
0.3 |
3.20 |
0-5
0-10
0-120
3-120
5-120
10-120 |
DDM-90 |
90 |
4.8 |
2.0 |
0.3 |
3.18 |
DDM-89 |
89 |
5.0 |
2.5 |
0.5 |
3.15 |
DDM-88 |
88 |
4.0 |
5.0 |
0.5 |
3.15 |
All kind
Sizes. |
DDM-87 |
87 |
7.0 |
2.0 |
0.5 |
-- |
DDM-83 |
83 |
5.0 |
8.0 |
0.8 |
-- |
DDM-80 |
80 |
6.0 |
12.0 |
0.8 |
-- |
--〉Medium grade
The medium magnesia is produced by our company in twotypes. Both manesia contains light fired magnesia powder (MgO 95-99%). They arefired and pressed to balls in vertical furnace (using oil). The products isgood burned, and have high density. They are used as high-purity raw materialin producing magnesia products.
The medium magnesia is divided to two types: oil firingand coke firing products. The coke firing magnesia used light fired magnesia asraw material (MgO ≥97%), BD ≥3.20 g/cm 3 ; oil firing magnesia uses95-96% MgO as raw material, BD≥3.25 g/cm 3 . they are high-purity rawmaterial.
| Brand |
Chemical composition (%) |
Size
(mm) |
MgO≥ |
SiO 2 ≤ |
CaO≤ |
L.O.I.≤ |
Bulk density≥ (g/cm 3 ) |
DDM-96 |
96 |
1.5 |
1.6 |
0.3 |
3.30 |
DDM-95 |
95 |
2.2 |
1.6 |
0.3 |
3.25 |
0-30 |
DDM-94 |
94 |
3.0 |
1.6 |
0.3 |
3.20 |
0-60 |
NOTE:
Generally speaking, magnesia stands for a certain groupof magnesium compounds. It includes:
Magnesium oxide (magnesia usta) MgO
Magnesium hydroxide Mg(OH) 2
Magnesium carbonate MgCO 3
Magnesium hydroxide carbonate (Magnesia alba) differentstoichiometric composition, e.g.
4MgCO 3 *Mg(OH) 2 *4H 2 O
4MgCO 3 *Mg(OH) 2 *5H 2 O
7MgCO 3 *2Mg(OH) 2 *7H 2 O
magnesium carbonate occurring naturally is also calledcrude (raw) magnesite (uncalcined magnesite).
Burnt (calcined) magnesia or burnt (calcined) magnesiteare also common terms for magnesium oxide. Magnesium oxide can generally bedivided into qualities which are burnt at high temperatures, having virtuallyno more chemical reactive properties (also called dead burnt or sinteredmagnesia), and those qualities calcined at a relatively low temperature, calledcaustic calcined magnesia. These demonstrate chemical reactivity, e.g. inalkaline aqueous slurry.
|
