Mould powder is a synthetic slag that covers the molten steel surface in the mould during the casting process, stabilizes the casting operation and improves the surface quality of the slab.
Classification: slab, billet, rectangular slab mould powder
Function:
Insulating the molten steel surface of the mould to avoid solidification of molten steel
Insulating air to prevent secondary oxidation of molten steel
Absorbing the inclusions floating in the molten steel, purifying the molten steel
Forming a slag film between the solidified shell and the inner wall of the mould to achieve good lubrication
Improving heat transfer between the mould and the shell to prevent surface cracks.
Main physical and chemical performance index:
Slab Mould Powder
|
Type |
BST-CDB |
BST-DB |
BST-ZB |
BST-GB |
|
Moisture % |
<0.5 |
<0.5 |
<0.5 |
<0.5 |
|
Particle size % |
0.10~1mm>90 |
0.15~1mm>90 |
0.15~1mm>90 |
0.15~1mm>90 |
|
CaO/SiO2 |
0.8~1.1 |
0.8~1.05 |
0.95~1.35 |
0.9~1.35 |
|
Hemisphere point |
1050~1150℃ |
950~1030℃ |
950~1150℃ |
1000~1100℃ |
|
1300℃melting speed |
20~30 S |
10~30 S |
15~35 S |
20~30 S |
|
1300℃viscosity |
0.15~0.55Pa.s |
0.08~0.2Pa.s |
0.08~0.25Pa.s |
0.05~0.18Pa.s |
|
Volume weight |
0.60~0.85g/cm3 |
0.60~1.00g/cm3 |
0.50~0.90g/cm3 |
0.50~0.90g/cm3 |
|
Applicable section |
(150~250) mm X (800~1600) mm |
|||
|
Applicable casting speed |
0.7~1.8m/min |
|||
Note: BST-CDB is applied to ultra low carbon steel series C ≤0.05%, BST-DB is applied to ultra low carbon steel series C<0.08%, BST-ZB is applied to carbon steel, low alloy and other steel grades with a carbon content of 0.08~0.35%, BST-GB is applied to High carbon steel series C ≥0.35%
Billet and Rectangular Slab Mould Powder
|
Type |
BST-FJ-1 |
BST-FJ-2 |
BST-FJ-3 |
BST-FJ-4 |
|
Moisture % |
<0.5 |
<0.5 |
<0.5 |
<0.5 |
|
Particle size % |
0.15~1mm>90 |
0.15~1mm>90 |
0.15~1mm>90 |
0.15~1mm>90 |
|
CaO/SiO2 |
0.85~1.05 |
0.85~1.00 |
0.75~0.95 |
0.50~0.80 |
|
Hemisphere point |
1070~1130℃ |
1100~1150℃ |
1030~1080℃ |
1000~1120℃ |
|
1300℃melting speed |
30~40 S |
35~45 S |
40~50 S |
40~50 S |
|
Carbon content |
8~12 |
10~14 |
12~17 |
13~18 |
|
Applicable section |
120mm×120mm,150mm×150mm,175mm×175mm,180mm×180mm,200mm×200mm,240mm×240mm,300mm×300mm,280mm×320mm,320mm×410mm |
|||
|
Applicable casting speed |
0.6~3.0m/min |
|||
Note: Applicable steel grade: Carbon, excellent carbon and low alloy steel with a carbon content of 0.08~0.35%
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