slag, copper smelting

Additional physico-chemical information

Administrative data

Endpoint:

other: chemical and mineralogical characterization

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

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

Principles of method if other than guideline:

Chemistry /elemental analysis was determined using ICP (inductively Coupled Plasma spectroscopy). Metal speciation/metal mineralogy was assessed from Sequential extraction/metal analysis and mineralogical analysis (XRD and microscopes equipped with EDS (Energy Dispersive Spectrometry) and WDS (Wavelength Dispersive Spectrometry) analysers. The interpretation of the overall results was performed by expert (with profound knowledge of metal particularities).

GLP compliance:

no

Remarks:

Equivalent quality assurance

Test material

Test material information

Constituent 1

Reference substance name:

Iron silicate, copper smelting and refining

EC Number:

701-480-0

Cas Number:

67711-92-6

IUPAC Name:

Iron silicate, copper smelting and refining

Details on test material:

The following sample types were chosen as representative for the production processes depending on origin of raw material (primary or secondary) and slag cooling rate ( :rapd coolig /granulation or slow cooling)
Type I: Slag, Granules, Primary ( 09TT02641, 09TT02988, 09TT03512, 09TT05246)
Type II: Slag, Granules, Secondary (09TT02896, 09TT02897, 09TT03177, 09TT03821)
Type III: Slag, Slow cooled, primary( 09TT05245, 09TT03989)
Type IV: Slag, slow cooled, secondary (09TT03181)

12 samples representative for the slag types described above were colleced at different sites

Sampling and sample preparation was performed according to ECI/REACH C1 Sampling Protocol. The C1 sampling protocol also provides detailed information on the identity of the samples (see IUCLID section 1.4).

Results and discussion

Any other information on results incl. tables

Chemical composition of studied samples, Type I

Lab code			09TT02641	09TT02988	09TT03512	09TT05246
Sample			Slag	Slag	Slag	Slag
Sample type			I	I	I	I
Cu	P1	%	<0.010	< 0.004	<0.003	<0.005
	P2	%	0.13	0.45	0.91	0.29
	P3	%	0.40	0.47	0.04	0.40
	P4	%	0.02	0.10	0.00	0.06
	Sum		0.55	1.02	0.95	0.75
	TOT	%	0.70	1.00	0.98	0.78
As	P1	%	<0.010	< 0.004	<0.003	<0.005
	P2	%	<0.020	0.01	0.01	0.06
	P3	%	<0.010	< 0.005	<0.003	0.01
	P4	%	<0.004	0.02	0.00	0.01
	Sum		0.00	0.02	0.01	0.07
	TOT	%	<0.006	0.09	0.01	0.07
Fe	P1	%	<0.010	< 0.004	<0.003	<0.005
	P2	%	28.60	27.70	10.30	33.00
	P3	%	0.25	0.16	<0.003	0.13
	P4	%	0.69	12.90	0.01	6.95
	Sum		29.54	40.76	10.31	40.08
	TOT	%	34.60	41.60	10.40	41.20
Ni	P1	%	<0.010	< 0.004	<0.003	<0.005
	P2	%	<0.020	< 0.010	0.01	0.02
	P3	%	<0.010	< 0.005	<0.003	0.01
	P4	%	<0.004	< 0.002	0.00	0.01
	Sum		0.00	0.00	0.01	0.04
	TOT	%	0.03	0.00	0.01	0.04
Pb	P1	%	<0.010	< 0.004	<0.003	<0.005
	P2	%	<0.020	0.03	0.09	0.07
	P3	%	<0.010	0.01	0.32	0.02
	P4	%	0.02	0.15	0.50	0.18
	Sum		0.02	0.19	0.91	0.28
	TOT	%	0.02	0.18	1.10	0.30

P1= H₂O , P2= H₂SO₄, P3= KCN+Br-MeOH, P4= HNO₃–soluble, TOT= total -, BM= bromine-methanol dissolutions, KEM= ion exchange chromatography, LECO = S/C analyzer, satmagan = Fe₃O₄analyzer Chemical composition of studied samples, Type I continued

Lab code			09TT02641	09TT02988	09TT03512	09TT05246
Sample			Slag	Slag	Slag	Slag
Sample type			I	I	I	I
Co	TOT	%	0.03	0.01	0.07	0.02
Sb	TOT	%	0.02	< 0.03	<0.01	0.02
Sn	TOT	%	0.13	0.01	<0.01	0.05
Zn	TOT	%	0.95	0.87	0.86	1.32
Mo	TOT	%	n.a.	0.17	n.a.	n.a.
Ag	TOT	%	<0.002	< 0.002	<0.002	<0.010
SiO2	KEM	%	37.90	29.20	39.3	31.80
Al2O3	TOT	%	4.83	5.19	11.70	2.91
Cr2O3	TOT	%	0.25	0.02	0.07	0.04
K2O	TOT	%	0.34	1.47	3.20	0.76
MgO	TOT	%	1.00	1.41	6.10	0.64
MnO	TOT	%	0.57	0.06	0.25	0.05
Na2O	TOT	%	0.74	0.48	0.78	0.40
CaO	TOT	%	2.00	1.84	21.90	2.98
S	Leco	%	0.51	0.05	0.04	0.66
SO42-	KEM	%	<0.025	< 0.02	0.02	<0.025
C	Leco	%	0.10	0.05	0.09	0.09
Satmagan		%	0.33	5.10	0.00	2.28

P1= H₂O , P2= H₂SO₄, P3= KCN+Br-MeOH, P4= HNO₃–soluble, TOT= total -, BM= bromine-methanol dissolutions, KEM= ion exchange chromatography, LECO = S/C analyzer, satmagan = Fe₃O₄analyzer

 

Applicant's summary and conclusion

Conclusions:

Good quality study that assessed full chemistry and mineralogy of typical copper slag samples. Proposed mineralogy (distribution pattern for each key element, i.e. % from total into the various mineralogical forms/species present into the UVCB) can be used for classification of the UVCB substance (mixture toxicity rules).

Executive summary:

The studied four primary granulated slag samples ( sample type I) contain 10.4- 41.6% iron, 29.2- 39.3% SiO2 , 0.7- 1% copper, 0.86-1.32% zinc, traces of other metals like Pb, As, Ni.. It consists mainly (93.5- 99.1%) of glass with accessory copper sulphides like bornite, covellite and chalcocite, metallic copper, magnetite and lead as metallic, oxidic and as galena.

Depending on the slag, the distribution of copper between different phases, mainly glass, copper sulfides and metallic copper, varies. Glass carries 25.7- 84% of slags total copper, copper sulfides from 1.7% to 39.6% and metallic copper 1.8% to 39%.

Zinc is mainly carried by glass and less by magnetite. In two slag samples, galena is the only carrier of lead, in one slag all lead occurs as metallic and in one sample lead occurs as metallic and oxidic as litharge –type minerals and also glass is lead –bearing.

Arsenic is completely included in glass phase. Nickel occurs in metallic or alloy form.