cupro, copper processing

Additional physico-chemical information

Administrative data

Endpoint:

other: representative mineralogy

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No GLP study but other quality assurance

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

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:

but equivalent Quality Assurance

Test material

Test material information

Constituent 1

Reference substance name:

cupro, copper processing

EC Number:

919-583-6

IUPAC Name:

cupro, copper processing

Details on test material:

Representative samples collected according to Standard sampling protocol of the REACH Copper Consortium (see attach to Iuclid 1.4)
B15, sample description: Cupro, Representative charge, Metallic fraction (composite, grinded), sample code: MC_B15_54_1A_comp_0904, lab code: 09TT02932
B15, sample description: Cupro, Representative charge, metallic fraction (representative pieces, lumps), sample code: MC_B15_54_1B_comp_0904, lab code: 09TT02790
B15, sample description: Cupro, Representative charge, Oxidic fraction (ie powder) (composite, homogenized), sample code: MC_B15_54_2_comp_0904, lab code: 09TT02933
B15, sample description: Cupro, Al-specific charge, Metallic fraction (composite, grinded), sample code: MC_B15_Al_3A_comp_0906, lab code: 09TT05024
B15, sample description: Cupro, Al-specific charge, Metallic fraction (representative pieces, lumps), sample code: MC_B15_Al_3B_comp_0906, lab code: 09TT04859

Results and discussion

Results:

The tested materials were characterized (physico-chemical and mineralogical properties) in view of the upcoming REACH registrations of copper intermediates and copper slags by the Copper Consortium.

Any other information on results incl. tables

The studied three (3) cupro samples contain 24.7- 68% copper, 5.8- 12.4% nickel, 0.8- 18.7% lead, 2.1- 8.9% iron, 2.2- 4.1% tin and 12.3- 17.1% silicon and consist mainly of copper-, iron- and nickelsilicides.

Sample 09TT02932 consist of 52.1% coppersilicide, 17.7% ferrisilicide, 11.9% copper aluminium alloys and 11.2% nickelsilicide with accessory nickel alloys, metallic tin and lead, while sample 09TT02933 consist 24.6% ferrisilicide, 20.5% nickel silicide, 18.4% lead, 10.9% copper tin alloys and 10% metallic copper. Sample 09TT05024 consist 49.5% coppersilicide, 26.7% copper aluminium alloys, 15.6% nickelsilicide with accessory copper tin alloys, ferrisilicide and metallic lead.

The chemical analysis of studied sampled are given in Table7 and their mineralogical composition in Table8 with distribution of copper. The microscope images, XRD and TG/DSC –graphs and results of water solubility tests are given for samplesin Appendices A- C.

 

Table7: Chemical composition of studied samples

Lab code			09TT02932	09TT02933	09TT05024					09TT02932	09TT02933	09TT05024
Sample code			B15	B15	B15					B15	B15	B15
Cu	P1	%	0.02	<0.01	< 0.004		Co	TOT	%	0.65	0.38	0.22
	P2	%	<0.02	<0.02	< 0.011		Sb	TOT	%	0.18	0.29	0.09
	P3	%	43.30	15.95	33.70		Sn	TOT	%	3.00	4.10	2.16
	P4	%	10.60	9.05	33.60		Zn	TOT	%	0.58	2.10	0.64
	Sum		53.92	25.00	67.30		Ag	TOT	%	0.02	0.02	0.11
	TOT	%	55.00	24.70	68.00
							Se	TOT	%	<0.01	<0.01	n.a.
As	P1	%	<0.01	<0.01	< 0.004		Te	TOT	%	<0.01	<0.01	n.a.
	P2	%	<0.02	<0.02	< 0.011
	P3	%	0.03	0.02	0.02		Si	KEM	%	15.99	17.06	12.34
	P4	%	0.01	<0.004	< 0.002		Al	TOT	%	1.27	2.01	4.93
	Sum		0.05	0.02	0.02		Cr	TOT	%	0.01	0.05	0.00
	TOT	%	0.06	0.04	0.05		K	TOT	%	<0.01	<0.01	< 0.005
							Mg	TOT	%	<0.01	0.14	< 0.003
Fe	P1	%	<0.01	<0.01	0.00		Mn	TOT	%	0.02	0.05	0.02
	P2	%	3.80	4.90	0.85		Na	TOT	%	0.02	0.17	0.02
	P3	%	0.13	0.09	< 0.005		Ca	TOT	%	0.01	0.58	0.00
	P4	%	0.03	0.44	0.05
	Sum		3.96	5.43	0.90		S	Leco	%	0.04	0.18	0.07
	TOT	%	7.00	8.90	2.12		SO42-	KEM	%	<0.02	<0.02	0.16
							C	Leco	%	0.08	0.21	0.05
Ni	P1	%	<0.01	<0.01	< 0.004		Satmagan		%	0.00	1.63	<1
	P2	%	7.80	2.57	3.88
	P3	%	0.49	0.25	0.02		Surface area		m2/g	0.16	1.16	0.05
	P4	%	0.94	0.72	0.41		Density		g/cm3	7.01	5.14	5.84
	Sum		9.23	3.54	4.31
	TOT	%	12.40	5.80	7.32
Pb	P1	%	<0.01	<0.01	0.01
	P2	%	0.04	0.30	0.02
	P3	%	<0.02	<0.025	< 0.005
	P4	%	0.85	16.70	1.15
	Sum		0.89	17.00	1.18
	TOT	%	0.82	18.70	1.22

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

Table 8: Mineral composition and distribution of copper

Sample		09TT02932				09TT02933				09TT05024
Type		B15				B15				B15
Mineral composition
CuSi	Coppersilicide	52.08		FeSi	Ferrisilicide	24.60		CuSi	Coppersilicide	49.52
FeNiSi	Ferrisilicide	17.71		NiFeSi	Nickelsilicide	20.54		CuAl	CuAl -alloy	26.70
CuAl	CuAl -alloy	11.88		Pb	Lead	18.40		NiSi	Nickelsilicide	15.64
NiSi	Nickelsilicide	11.16		CuSn	CuSn -alloy	10.90		CuSn	CuSn -alloy	5.25
NiSiAl	Ni -alloy	3.18		Cu	Copper	10.05		FeSi	Ferrisilicide	2.77
Sn	Tin	2.81		CuSi	Coppersilicide	9.46		Pb	Lead	1.22
Pb	Lead	0.78		ZnSiO	Willemite	4.09
SnSb	SnSb -alloy	0.35		Fe3O4	Magnetite	1.63
PbO	Litharge	0.05		PbO	Litharge	0.33
Total		100.00				100.00		Total		101.11
Distribution of copper
CuSi		83.33		Cu		40.68		CuSi		63.94
CuAl		16.34		CuSi		32.00		CuAl		32.93
FeNiSi		0.33		CuSn		27.32		CuSn		3.13
Distribution of iron
FeNiSi		99.78		FeSi		59.24		FeSi		56.77
NiSiAl		0.22		NiFeSi		35.15		NiSi		36.74
				Fe3O4		4.60		CuSi		5.61
				ZnSiO		0.97		CuAl		0.88
				CuSn		0.04

Applicant's summary and conclusion

Conclusions:

good quality study that assessed full chemistry and mineralogy of several representative Cupro. Proposed RWC 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 three (3) cupro samples contain 24.7- 68% copper, 5.8- 12.4% nickel, 0.8- 18.7% lead, 2.1- 8.9% iron, 2.2- 4.1% tin and 12.3- 17.1% silicon and consist mainly of copper-, iron- and nickelsilicides.

Sample 09TT02932 consist of 52.1% coppersilicide, 17.7% ferrisilicide, 11.9% copper aluminium alloys and 11.2% nickelsilicide with accessory nickel alloys, metallic tin and lead, while sample 09TT02933 consist 24.6% ferrisilicide, 20.5% nickel silicide, 18.4% lead, 10.9% copper tin alloys and 10% metallic copper. Sample 09TT05024 consist 49.5% coppersilicide, 26.7% copper aluminium alloys, 15.6% nickelsilicide with accessory copper tin alloys, ferrisilicide and metallic lead.

 

Based on these results the followingRWC Distribution pattern is derived (relevant for classification):

Copperin the form of metal/alloy (WC Cu metal powder, 100% from total Cu)
Nickelin the form of alloy (WC Ni powder, 100% from total Ni)
Leadin the form of Pb metal (WC Pb powder, 93.98% from total Pb) + oxide/compounds form (6.02% from total Pb)
Zincin the form of oxide (100% from total Zn)
Cobaltin the form of metal/alloy (100% from total Co)
Tinin the form of alloy/metal (100% from total Sn)
Other metallic elements: in the form of metal (WC powder form, 100% from total element)
Siliconin the form of silicides (100% from total Si)