Flue dust, copper-refining

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:

Flue dust, copper-refining

EC Number:

266-966-2

EC Name:

Flue dust, copper-refining

Cas Number:

67711-90-4

IUPAC Name:

flue dust, copper refining

Details on test material:

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

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

Sample	Flue dust	Flue dust	Flue dust
Sample	B11	B11	B11
Outotec code	09TT03192	09TT03513	09TT03514

The studied flue dust samples are fine- grained, the D₅₀ value is for all samples below 20µm. They contain 9.18- 51.0% lead, 0.52- 9.58% copper, 6.3- 43.9% zinc, 0.09- 2.8% arsenic, and 1.15- 14.7% sulfur.

Flue dust samples 09TT03192 and 09TT03513 consist mainly of zinc oxide, zincite, other main compounds being zinc oxide chloride and dawsonite –type sodium carbonate in 09TT03192 and plattnerite and anglesite– type lead oxide and carbonate in 09TT03513. The sample 09TT03514 consist mainly galena, sphalerite, energite and organic carbon.

The chemical analysis of studied sampled are given in Table 8 and Table 9 and their mineralogical composition in Table 10 with distribution of copper. The microscope images, XRD and TG/DSC –graphs and results of water solubility tests are given for samples 09TT03192 in Appendix A, 09TT03513 in Appendix B and 09TT03514 in Appendix C

 

Table8: Chemical composition of studied sample, part 1

Lab code			09TT03192	09TT03513	09TT03514
Sample			Flue dust	Flue dust	Flue dust
Sample code			B11	B11	B11
Cu	P1	%	0.15	<0.003	0.01
	P2	%	7.00	1.69	0.43
	P3	%	2.25	0.06	0.01
	P4	%	0.17	0.09	0.05
	Sum		9.57	1.84	0.50
	TOT	%	9.58	1.80	0.52
As	P1	%	< 0.004	<0.003	<0.002
	P2	%	0.08	0.40	2.51
	P3	%	< 0.005	<0.003	<0.003
	P4	%	< 0.002	0.04	0.13
	Sum		0.08	0.44	2.64
	TOT	%	0.09	0.45	2.80
Fe	P1	%	< 0.004	<0.003	<0.002
	P2	%	0.58	0.20	0.03
	P3	%	0.02	<0.003	<0.003
	P4	%	0.12	0.05	0.12
	Sum		0.72	0.25	0.15
	TOT	%	0.78	0.29	0.17
Ni	P1	%	0.01	<0.003	<0.002
	P2	%	0.05	<0.007	<0.006
	P3	%	0.03	<0.003	<0.003
	P4	%	0.14	<0.001	0.00
	Sum		0.22	0.00	0.00
	TOT	%	0.23	0.00	0.00
Pb	P1	%	0.87	0.22	0.19
	P2	%	0.12	0.10	0.13
	P3	%	0.73	3.76	6.74
	P4	%	7.67	33.50	40.90
	Sum		9.39	37.58	47.96
	TOT	%	9.18	39.60	51.00

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 9: Chemical composition of studied sample, part 2

Lab code			09TT03192	09TT03513	09TT03514
Sample			Flue dust	Flue dust	Flue dust
Sample code			B11	B11	B11
Co	TOT	%	0.01	0.00	0.00
Sb	TOT	%	0.08	<0.01	0.10
Sn	TOT	%	1.38	<0.01	0.28
Zn	TOT	%	43.90	25.60	6.30
Mo	TOT	%	0.01	n.a.	0.07
Ag	TOT	%	0.01	0.01	0.01
Se	TOT	%	0.01	n.a.	0.02
Sr	TOT	%	< 0.002	n.a.	n.a.
Te	TOT	%	< 0.002	n.a.	n.a.
Bi	TOT	%	n.a.	n.a.	0.02
Cd	TOT	%	n.a.	n.a.	0.08
SiO2	KEM	%	1.13	3.4	1.40
Al2O3	TOT	%	0.70	0.72	0.14
Cr2O3	TOT	%	0.04	0.01	<0.003
K2O	TOT	%	0.53	6.00	1.11
MgO	TOT	%	0.10	1.90	0.05
MnO	TOT	%	0.03	0.07	0.00
Na2O	TOT	%	7.66	1.30	0.41
CaO	TOT	%	0.40	1.40	0.10
TiO2	TOT	%	0.02	n.a.	0.01
Zr	TOT	%
Ba	TOT	%	< 0.01	n.a.	n.a.
P	TOT	%	n.a.	n.a.	0.01
Cl-	KEM	%	8.50	n.a.	n.a.
B	TOT	%	0.01	n.a.	n.a.
S	Leco	%	1.15	1.35	14.70
SO42-	KEM	%	n.a.	4.30	0.50
C	Leco	%	0.79	0.60	15.20
Satmagan		%	0.00	n.a.	n.a.
surface area		m2/g	3.01	3.34	-
density		g/cm3	4.74	5.33	3.22
ash content		%	n.a.	n.a.	91.20

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 10: Mineral composition and distribution of copper

09TT03192				09TT03513				09TT03514
B11				B11				B11
Mineral composition, -%
Cu	Copper	2.63		Cu	Copper	0.07		Cu5FeS4	Bornite	0.02
CuO	Tenorite	6.27		Cu2O	Cuprite	1.98		Cu3AsS4	Enargite	13.23
CuSnO	CuSn -oxide	8.38		FeNiO2	Trevorite	0.02		PbS	Galena	61.87
NiO	Bunsenite	0.06		K2O	K -oxide	6.00		ZnS	Sphalerite	10.51
PbCO3	Cerussite	8.15		PbO	Massicot	0.11		CaSO4	Gypsum	0.29
PbO	Litharge	0.23		ZnO	Zincite	34.09		C	Carbon	15.20
SiO2	Cristobalite	1.51		PbO2	Plattnerite	29.55
Zn2OCl2*2H2O	Zinc oxide chloride	19.54		PbSi(Fe,Al,Ca)O2-3	Pb- glass	11.59
ZnO	Zincite	33.95		PbCaAsx	Pb- glass	1.91
NaAl(CO3)(OH)2	Dawsonite	19.27		PbSO3	Anglesite	13.57
				NaCaSiOx	NaCa -silicate	1.10
Total		100.00		Total		100.00		Total		101.13
Distribution of copper
Cu		27.01		Cu		3.59		Cu5FeS4		0.20
CuO		51.10		Cu2O		83.42		Cu3AsS4		99.80
CuSnO		21.89		PbSi(Fe,Al,Ca)O2-3		11.15
				PbCaAsx		1.84

 

Applicant's summary and conclusion

Conclusions:

Good quality study that assessed full chemistry and mineralogy of flue dust 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 studied flue dust samples are fine- grained, the D₅₀value is for all samples below 20µm. They contain 9.18- 51.0% lead, 0.52- 9.58% copper, 6.3- 43.9% zinc, 0.09- 2.8% arsenic, and 1.15- 14.7% sulfur.

Flue dust samples 09TT03192 and 09TT03513 consist mainly of zinc oxide, zincite, other main compounds being zinc oxide chloride and dawsonite –type sodium carbonate in 09TT03192 and plattnerite and anglesite– type lead oxide and carbonate in 09TT03513. The sample 09TT03514 consist mainly galena, sphalerite, energite and organic carbon.

.

Based on these results, the following RWC Distribution pattern is derived (relevant for classification):

Copper in the metal Cu form (WC powder, 16.58% from total Cu) + in Cu(I) oxide forms (83.42% from total Cu)

Lead in the compound forms (100% from total Pb)

Zinc in the oxide form (100% from total Zn)

Arsenic in the form of Arsenic compounds (100% from total As)

Nickel in the form of oxide (WC NiO, 100% from total Ni)

Cadmium, tin, and other metals: oxide forms (each, 100% from total element)