Speiss, 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

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:

Speiss, copper

EC Number:

273-836-9

EC Name:

Speiss, copper

Cas Number:

69029-97-6

IUPAC Name:

Speiss, copper

Details on test material:

sample collection made according Standards (material collected over long period was mixed, crushed and homogenised); sample representative for copper speiss
B7, sample description: Speiss, representative (grinded, homogenised & sieved), sample code: BM_B7_2008, lab code: 09TT02684

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.
The studied speiss sample contains 55.9% copper, 10.2% antimony, 7.35% arsenic, 7% nickel, 0.12% lead and 2.4% sulphur.
The studied speiss sample consists mainly of metallic copper (32.4%), covellite, CuS, (26.2%), iron arsenic -alloy, FeAs (17.5%), nickel antimony –alloy, NiSb, (14.9%) with accessory copper arsenides and copper- tin alloys.
Metallic copper carries 51.3% of the speiss total copper content, and covellite carries (34%). The rest is carried by copper and iron arsenides and copper- tin alloys. The main carrier of arsenic is iron- arsenic –alloy (72%), other carries being metallic copper and copper arsenide. The lead in the studied sample occurs as metallic.

Any other information on results incl. tables

1.1.                 Chemical and mineralogical characterization

The chemical analysis of studied sampled are given inTable7and mineralogical composition inTable8with distribution of main elements within different minerals.

The microscope images, XRD and TG/DSC –graphs and results of water solubility tests are given for samplein Appendix A.

 

Table 7: Chemical composition of studied sample

Lab code			09TT02684
Sample			Speiss
Sample code			B7
Cu	P1	%	<0.005		Co	TOT	%	0.25
	P2	%	1.43		Sb	TOT	%	10.20
	P3	%	24.40		Sn	TOT	%	2.80
	P4	%	28.90		Zn	TOT	%	0.24
	Sum		54.73		Mo	TOT	%	0.07
	TOT	%	55.90		Ag	TOT	%	0.12
As	P1	%	0.02
	P2	%	0.16		SiO2	KEM	%	0.82
	P3	%	0.79		Al2O3	TOT	%	0.14
	P4	%	6.39		Cr2O3	TOT	%	<0.006
	Sum		7.35		K2O	TOT	%	<0.129
	TOT	%	10.20		MgO	TOT	%	0.09
Fe	P1	%	<0.005		MnO	TOT	%	0.01
	P2	%	0.84		Na2O	TOT	%	0.05
	P3	%	0.25		CaO	TOT	%	0.08
	P4	%	3.43		TiO2	TOT	%	<0.010
	Sum		4.52
	TOT	%	5.23		S	Leco	%	2.42
Ni	P1	%	0.01		SO42-	KEM	%	<0.03
	P2	%	0.14		C	Leco	%	0.09
	P3	%	0.82		Satmagan		%	0.33
	P4	%	6.07		Surface area		m2/g	0.22
	Sum		7.04		Density		g/cm3	7.90
	TOT	%	7.70
Pb	P1	%	<0.005
	P2	%	0.04
	P3	%	0.04
	P4	%	0.05
	Sum		0.13
	TOT	%	0.12

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 main elements

Sample		09TT02684
Type		Speiss
Mineral composition		B7
Cu	Copper	32.41
CuS	Covellite	26.16
FeAs	Modderite	17.49
NiSb	Breithauptite	14.86
Cu5As2	Koutekite	4.29
Cu3Sn2	Stannopalladinite	3.62
Si(Fe,Al,Ca)O2-3	Glass	1.63
ZnS	Sphalerite	0.40
Fe3O4	Magnetite	0.33
Pb	Lead	0.12
Total		101.30
Distribution of copper, -%
Cu		51.27
CuS		34.06
NiSb		0.98
Cu3Sn2		2.86
Cu5As2		5.15
FeAs		5.67
Si(Fe,Al,Ca)O2-3		0.01
Distribution of iron, -%
FeAs		77.34
CuS		14.47
Fe3O4		3.13
Si(Fe,Al,Ca)O2-3		2.83
Cu		1.45
NiSb		0.49
ZnS		0.31
Distribution of arsenic, -%
FeAs		72.01
Cu		14.07
Cu5As2		11.72
NiSb		2.17
Si(Fe,Al,Ca)O2-3		0.03
Distribution of antimony, -%
NiSb		88.78
Cu		7.06
Cu5As2		3.22
FeAs		0.94
Distribution of tin, -%
Cu3Sn2		71.76
Cu		28.24

 

Applicant's summary and conclusion

Conclusions:

good quality study that assessed full chemistry and mineralogy of a representative Copper speiss. 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 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 speiss sample consists mainly of copper, 55, 9%Cu with 10.2% antimony, 7.4% arsenic, 7% nickel, 0.12% lead and 2.4% sulfur and it consist mainly of metallic copper, copper sulfides and copper, iron and nickel arsenides and alloys.

Metallic copper carry most 51% of speiss’s total copper content, copper sulfides carry 34% and the rest 15% is carried mainly bycopperand iron arsenides.