Matte, copper

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

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other 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:

copper, matte

IUPAC Name:

copper, matte

Details on test material:

sample collection made according to ECI/REACH Copper Consortium Standards Protocols (see IUCLID section 1.4)

Sample Matte Matte White metal White metal Matte
Sample B2 B2 B2 B2 B2
Outotec code 09TT02787 09TT02788 09TT07029 09TT07719 10TT00139
Sample collection made according to ECI/REACH Copper Consortium Standards Protocols (see IUCLID section 1.4 and 4.1 attachment)
Sample description Sample Code Lab Code
B2 Matte, Flash furnace type (composite from grinded material) AC_B2_625559 09TT02788
B2 Matte, Electric furnace type (composite from grinded material) AC_B2_625208 09TT02787
B2 matte, blast furnace type (composite from grinded material) KGHM_B2 10TT00139
B2 matte, white matte-type (site 2C importer) (representative) El Teniente 09TT07029
B2 matte, white matte-type (site 2D importer) Codelco Norte 09TT07719

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 copper matte samples consists mainly of copper, 52.4- 77.3%Cu with 1.6%- 14.6%Fe, 0.04- 1.1%As, 0.05- 6.7%Pb and 18.9- 21.7% sulfur and they consist mainly of copper sulfides of chalcocite or bornite –types. The amount of copper sulfides ranges between 74.2- 96.4%. The rest of the matte samples consist of accessory phases like copper arsenides, metallic copper, magnetite and copper oxides of cuprite –type.

In every case, copper sulfides carry most 83- 95.9% of mattes total copper content, rest being carried by metallic copper, copper arsenides, cuprite and magnetite. When encountered, arsenic is carried either copper arsenides or it occurs as trace element in copper sulfides and metallic copper. In most cases, lead is carried by metallic lead, one by galena –type lead sulfide and one by both metallic lead (84%) and lead oxides (16%)

The chemical analysis of studied sampled are given in Table 7 and Table 8 and their mineralogical composition in Table 9 and Table 10 with distribution of copper.

 

Table7: Chemical composition of studied sample, part 1

Lab code			09TT02787	09TT02788	09TT07029	09TT07719	10TT00139
Sample code			B2	B2	B2	B2	B2
Cu	P1	%	0.02	0.02	0.01	0.02	0.01
	P2	%	0.73	1.99	0.92	0.62	0.59
	P3	%	72.40	51.30	69.50	75.70	42.40
	P4	%	0.40	6.06	1.86	0.15	9.16
	Sum		73.55	59.37	72.29	76.48	52.16
	TOT	%	73.50	61.50	72.40	77.30	52.40
As	P1	%	<0.008	<0.008	<0.004	<0.003	<0.004
	P2	%	<0.020	<0.020	<0.01	<0.012	<0.01
	P3	%	0.58	0.07	0.05	0.27	0.04
	P4	%	0.41	0.02	0.00	0.02	0.17
	Sum		0.99	0.09	0.05	0.28	0.21
	TOT	%	1.08	0.09	0.04	0.31	0.21
Fe	P1	%	<0.008	<0.008	<0.004	<0.003	0.02
	P2	%	0.46	3.00	0.80	0.32	2.73
	P3	%	1.74	4.03	2.20	0.76	4.17
	P4	%	0.21	4.95	1.42	0.17	8.11
	Sum		2.41	11.98	4.42	1.25	15.03
	TOT	%	2.47	12.50	4.51	1.55	14.60
Ni	P1	%	<0.008	<0.008	<0.004	<0.003	n.a
	P2	%	<0.020	<0.020	<0.01	<0.008	n.a
	P3	%	0.04	<0.010	0.01	0.01	n.a
	P4	%	0.01	<0.004	0.01	0.00	n.a
	Sum		0.05	0.00	0.02	0.01
	TOT	%	0.04	0.01	0.02	0.01	0.16
Pb	P1	%	0.01	<0.008	n.a	0.00	0.76
	P2	%	0.15	0.18	n.a	0.03	0.31
	P3	%	0.04	0.06	n.a	<0.100	0.03
	P4	%	0.37	0.25	n.a	0.09	5.13
	Sum		0.58	0.49		0.12	6.23
	TOT	%	0.55	0.45	0.05	0.11	6.67

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, n.a. = not analyzed

 

Table 8: Chemical composition of studied sample, part 2

Lab code			09TT02787	09TT02788	09TT07029	09TT07719	10TT00139
Sample code			B2	B2	B2	B2	B2
Co	P1	%	n.a	n.a	n.a	n.a	0.02
	P2	%	n.a	n.a	n.a	n.a	0.43
	P3	%	n.a	n.a	n.a	n.a	0.06
	P4	%	n.a	n.a	n.a	n.a	0.39
	Sum						0.90
Co	TOT	%	0.01	0.01	0.01	<0.004	0.76
Sb	TOT	%	0.17	0.02	<0.03	0.02	0.02
Sn	TOT	%	0.03	0.03	<0.002	<0.004	0.02
Zn	TOT	%	0.10	0.41	0.04	0.09	1.66
Mo	TOT	%	<0.004	0.01	n.a	n.a	n.a
Ag	TOT	%	0.01	0.02	0.01	0.03	0.14
Se	TOT	%	0.04	0.04	n.a	n.a	0.01
Te	TOT	%	<0.021	<0.021	n.a	n.a	<0.005
SiO2	KEM	%	0.20	0.24	0.22	0.20	0.32
Al2O3	TOT	%	<0.079	<0.077	<0.004	0.02	0.01
Cr2O3	TOT	%	<0.006	<0.006	<0.003	<0.006	0.02
K2O	TOT	%	<0.126	<0.125	<0.03	<0.120	0.15
MgO	TOT	%	0.01	<0.007	0.01	<0.007	0.01
MnO	TOT	%	<0.005	0.01	<0.003	<0.005	0.08
Na2O	TOT	%	<0.057	<0.055	<0.03	0.03	0.10
CaO	TOT	%	0.03	0.01	0.01	0.01	0.03
TiO2	TOT	%	<0.006	<0.006	n.a	n.a	n.a
S	Leco	%	18.90	21.50	20.50	20.00	21.70
SO42-	KEM	%	<0.02	0.03	n.a	<0.1	0.02
C	Leco	%	0.19	0.06	0.15	0.08	0.12
Satmagan		%	0.54	4.02	1.19	0.54	3.91
Surface area		m2/g	0.14	n.a**.	n.a.**	0.03	0.05
density		g/cm3	5.76	5.28	5.59	5.74	n.a

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 , n.a. = not analyzed, n.a.** = material is too coarse to be measured,

 

Applicant's summary and conclusion

Conclusions:

Good quality study that assessed full chemistry and mineralogy of several representative Copper matte samples. 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 tested materials were characterized (physico-chemical and mineralogical properties)inview of the upcoming REACH registrations of copper intermediates and copper slags by the Copper Consortium.

The studied copper mane samples consists mainly of copper, 52.4- 77.3%Cu with1.6°c- 14.6%Fe, 0.04- 1.1%As, 0.05- 6.7%Pb and 18.9- 21.7% sulfur and they consist mainly of copper sulfides of chalcocite or bornite —types. The amount of copper sulfides ranges between 74.2- 96.4%. The rest of the matte samples consist of accessory phases like copper arsenides, metallic copper, magnetite and copper oxides of cuprite—type.

Inevery case, copper suit ides carry most 83- 95.9% of mattes total copper content, rest being carried by metallic copper, copper arsenides, cuprite and magnetite. When encountered, arseniciscarried either copper arsenides oritoccurs as trace elementincopper sulfides and metallic copper.Inmost cases, lead is carried by metallic lead, one by galena—typelead sulfide and one by both metallic lead (84%) and lead oxides (16%)

Based on these results the following Distribution patterns can be derived (indicative, NOT relevant for classification):

Matte FF(eg from Flash furnace, or electric furnace):

Copper present in th form of Cu metal (16.5% from total Cu)+ sulphides (83.5%)

Lead in the form of Pb metal (100% from total Pb)

Nickel in the form of Ni metal (100% from total Ni)

other (minor) metal elements: if present, in the form of sulphide (each 100% from total element)

Matte WM(eg from white matte):

Copper present in th form of Cu oxide (WC Cu(I), 1.04% from total Cu)+ Cu metal (4.65% from total Cu)+sulphide (94.35% from total Cu)

Lead in the form of Pb sulphide (WC Pb compounds, 100% from total Pb)

Nickel in the form of Ni metal (100% from total Ni)

other (minor) metal elements: if present, in the form of sulphide (each 100% from total element)

Matte BF(eg from Blast furnace):

Copper present in th form of Cu oxide (WC Cu(I), 1.04% from total Cu) + Cu metal (16.86% from total Cu)+ sulphides (83.1% from total Cu)

Lead in the form of Pb oxide (WC Pb compounds, 16.04% from total Pb)+ metal (83.96% from total Pb)

Nickel in the form of Ni metal (100% from total Ni)

Cobalt in the form of sulphide (68.27% from total Co)+ metal/inclusion (31.73% from total Co)

other (minor) metal elements: if present, in the form of sulphide (WC, each 100% from total element)

Based on Transformation/dissolution results, and gastric bio elution results, knowledge on the release patterns showed that conservative Pb forms (eg Pb compounds) are to be preferred. The following compiled RWC Distribution pattern is therfore derived (relevant for classification):

This distribution pattern is conservative, in particular in respect Pb (assuming total Pb is soluble compound form) and is therefore a worst case applicable to all grades

Copper Matte (RWC):

Copper present in th form of Cu oxide (WC Cu(I), 1.04% from total Cu) + sulphides (94.35% from total Cu)

Lead in the form of Pb oxide (WC Pb compounds, 100% from total Pb)

Nickel in the form of Ni metal (100% from total Ni)

Cobalt (if present) in the form of sulphide (68.27% from total Co)+ metal/inclusion (31.73% from total Co)

other (minor) metal elements: if present, in the form of sulphide (WC, each 100% from total element)