Slags, nickel smelting

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well documented study performed according to EU acceptable method

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

no

Remarks:

Other quality assurance

Type of method:

thermal analysis

Test material

Test material information

Constituent 1

Reference substance name:

Slags, nickel smelting

EC Number:

920-632-9

Molecular formula:

Not applicable, UVCB, inorganic

IUPAC Name:

Slags, nickel smelting

Details on test material:

Melting point was tested on the following typical sample :
Sample 09TT04683

Sampling and sample preparation was performed according to ECI/REACH C2 Sampling Protocol. The C2 sampling protocol also provides detailed information on the identity of the sample (see IUCLID section 1.4).

Results and discussion

Melting / freezing point

Melting / freezing pt.:

ca. 1 404 °C

Decomposition:

yes

Decomp. temp.:

ca. 1 404 °C

Remarks on result:

other: Sample 09TT04683

Any other information on results incl. tables

During the melting tests of the nickel electric furnace slag sample 09TT04683 was heated in Al2O3 crucible using nitrogen atmosphere and air atmosphere.

The endothermic peak in the curve of nitrogen atmosphere is at the temperature range 1416 – 1428 °C and at the same time the mass of the sample starts to decrease, which means, that melting starts, but some components also decompose or evaporate.

The endothermic peaks in the curve of air atmosphere is at the temperature range 1404 – 1437 °C and at the same time the mass of the sample starts to decrease, which means, that melting starts, but some components also decompose or evaporate.

Results from thermal analyses are

Sample	NiSU-slag
Outotec code	09TT04683
First endothermic peak in nitrogen	1416 - 1428 °C
Melting starts in nitrogen	1416 °C
First endothermic peak in air	1404 - 1437 °C
Melting starts in air starts	1404 °C

Applicant's summary and conclusion

Conclusions:

Based on the TG/DSC measurements, the melting in air starts at the temperature 1341 °C for granulated type slags and at temperature 1027 °C for slow cooled type slags..

Executive summary:

Based on the TG/DSC measurements, the melting of the nickel electric furnace slag starts in nitrogen atmosphere at 1416 oC and in air atmosphere at 1404 oC.