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| 1. Trade name: | ALCATEN 52 |
|---|---|
| 2. Producer: | KVS EKODIVIZE a.s. Leskovská 566, 793 12 Horní Benešov Tel. 554 748 050, 554 748 051 Fax. 554 748 052 |
| 3. Company standart: | RST - 02 - 06 / A |
| 4. Classification per SKP: | 27.42.12 |
5. Possible applications:
The chemical composition given below makes it possible to utilise technical aluminium oxide, among other things, for the treatment of steelmaking and refining slags.
The presence of Al2O3 causes an increase in the fluidity of the slags, which is subsequently reflected favourably in their desulphurisation capacities.
This is associated with the creation of an optimum composition of steelmaking and refining slags, which manifests itself with a decrease in the melting point of these slags – with reaching a eutectic, depending on the composition of the melt being processed.
The significant asset of ALCATEN is the fact that after slag reaches an optimum composition the slag remains liquid, which is reflected favourably in the absorption of inclusions and, subsequently, in an increase in the purity of steel being produced.
By contrast, when fluorspar is used, gaseous fluorides escape after it quickly melts, which subsequently shows in deterioration of the fluidity of the slag or even the slag hardening.
The metallurgical properties of ALCATEN are fully comparable with the hitherto used fluorspar (CaF2). Another important asset of ALCATEN is the fact that no compounds, which would worsen the working and living environment, are released when in contact with liquid metal or liquid slag. Environmentally harmful fluorides (e.g. carcinogenic SiF4) are released when fluorspar is used.
The presence of metallic aluminium has a positive effect on reducing the oxidation potential of refining slags, which makes it possible to increase the degree of desulphurisation of steel being processed. Alcaten has minimal contents of easily reducible oxides, in particular Fe2O3, MnO and FeO.
The contents of CaO, MgO, and Al2O3 make up ca. 80%, which has a favourable effect on the lifetime of linings of basically lined steelmaking furnaces and casting ladles but, in particular, during the out-of-furnace processing of steel on a pot furnace. The specific consumption of ALCATEN is comparable to fluorspar and ranges between 2 and 4 kg.t -1 depending on the qualitative requirements for steel.
The said physical and chemical parameters of ALCATEN also predestine it for further application in black metallurgy.
6. Chemical composition:
| Component | PN:RST-02-06/A | Current contents |
|---|---|---|
| Moisture | <3% | 1,5% |
| Metallic All. | <5% | 0 - 3 % |
| Al2O3 | > 52% | 53 - 56 % |
| MgO | 2 - 8% | 4 - 6 % |
| CaO | 10 - 20 % | 10 - 15 % |
| Annealing loss at 850 °C | 10 - 20 % | 10 - 15 % |
| SiO2 | <8% | 2 - 5 % |
| Fe2O3 | <3% | <1% |
| Other (Ti,Mn,Co,Zn,Cu) | <5% | <3% |
The annealing loss is associated primarily with a decrease in CO2, which is fixed as a result of CaO being used as a binder.
7. Physical properties:
ALCATEN is manufactured in the form of pellets of spherical shape and granules for minimising the dust nuisance when it is used and, also, for easy handling during batching.
| Quantity | PN: RST-02-06/A | Current value | Note |
|---|---|---|---|
| Colour | grey | grey | |
| Specific weight | 2200 Kg/m3 | 2100 - 2300 Kg/m3 | |
| Bulk density | 950 - 1200 Kg/m3 | 1000 - 1150 Kg/m3 | |
| Granulometry: | pellets of spherical shape, granules | ||
| 0 - 3 mm | < 5% | 2 - 4% | |
| 3 - 15 mm | > 80% | 75 - 85% | |
| 15 - 35 mm | < 20% | 15 - 25% | |
| Height of fall | 2m | 2m | fall on a steel plate |
| Specific heat capacity | 1,02 KJ/KgK | 1,0 - 1,1 KJ/KgK | |
| Angle of repose | 15° | 12 - 18° | in bulk |
The annealing loss is associated primarily with a decrease in CO2, which is fixed as a result of CaO being used as a binder.
8. Packing and transport:
a/ lorries in returnable BIG BAG containers per ca. 1 tonne
b/ by rail in returnable BIG BAG containers
c/ by rail in bulk in SASZ or Zaz type wagons
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