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RECAL for steel industry
| 1. Trade name: | RECAL |
| 2. Producer: | KVS EKODIVIZE a.s. Leskovská 566, 793 12 Horní Benešov Tel. +420 646 748 050, +420 646 748 051 Fax. +420 646 748 052 |
| 3. Company standard: | RST - 02 - 10 / A |
| 4. Classification according to SKP: | 27.42.12 |
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5. Possibilities of application:
It is possible to apply RECAL to deactivate furnace, eventually refining slag during the production of steel, or more precisely during its extra-furnace processing.
It serves for decreasing of oxidizing potential of steel slag, or steel bath.
Recommended dosing depends on FeO content in slag, eventually on content of active oxygen in steel.
Metal aluminium efficiency in RECALu is fully comparable with common use aluminium for desoxidation.
Co-attendant Al2O3 has positive influence on treatment and composition of especially calcium–aluminium refining slag.
Thereby conditions for flow-ability of refining slag and conditions for desulphurisation are improved.
6. Chemical composition:
It is possible to apply RECAL to deactivate furnace, eventually refining slag during the production of steel, or more precisely during its extra-furnace processing.
It serves for decreasing of oxidizing potential of steel slag, or steel bath.
Recommended dosing depends on FeO content in slag, eventually on content of active oxygen in steel.
Metal aluminium efficiency in RECALu is fully comparable with common use aluminium for desoxidation.
Co-attendant Al2O3 has positive influence on treatment and composition of especially calcium–aluminium refining slag.
Thereby conditions for flow-ability of refining slag and conditions for desulphurisation are improved.
6. Chemical composition:
| Component | PN:RST-02-10/A | Current content | Form |
| Moisture at 140°C | < 3% | 2% | free H2O |
| Al metal. | > 50% | 63% | particle 0,1 - 5 mm |
| Al2O3 | > 15% | >15% | Al(OH)3, Al2O3 AlO(OH) |
| MgO | < 3% | 1 - 3% | MgO, Mg(OH)2, |
| bonding agent | 10 - 15% | 10 - 11% | |
| SiO2 | < 8% | 5 - 8% | SiO2 |
| Fe2O3 | < 3% | < 1% | Fe2O3 |
| Other (Ti,Mn,Co,Zn,Cu) | < 2% | < 1% |
Notice: Gas elements N, Cl, F are fixed to thermally fixed compounds.
7. Physical properties:
RECAL is produced in form of cylindrical and oval shaped briquettes and tablets by reason of minimalization of dust nuisance during its application and also easy manipulation during the dosing.
| Quantity | PN: RST-02-10/A | Current value | Notice |
| Colour | grey | grey | |
| Specific weight | 1800 Kg/m3 | 1800 - 2100 Kg/m3 | |
| Powder density | 900 - 1000 Kg/m3 | 900 - 1100 Kg/m3 | |
| Grading: | briquettes, tablets | ||
| 0 - 15 mm | < 5% | 1 - 3% | |
| 15 - 40 mm | > 95% | 97 - 99% | |
| Stalling height | 2 m | 2 m | Fall on steel plate |
8. Packing and transport:
- trucks in returnable packs, type BIG BAG at c. 1 ton
- by railway in returnable packs, type BIG BAG, or in bulk
