Matte, lead

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: non GLP but other quality assurance

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:

other quality assurance

Test material

Test material information

Constituent 1

Results and discussion

Results:

The studied lead matte, sample 09TT07597 contains 59.3% iron, 18.7% sulphur, 5.8% lead, 1.4% SiO2, 0.7% copper and traces of other elements.
The studied lead matte, sample 09TT07599 contains 61.2% iron, 16.4% sulphur, 4% lead, 3.8% SiO2, 1.1% CaO and traces of other elements.
The studied copper-lead matte, sample 09TT08043 contains 57.8% lead, 22.1% copper, 13.6% sulphur and traces of other elements.
The studied lead matte, sample 09TT07597 consists mainly of troilite, FeS (42.8%), wüstite, FeO (18.7%), iron sulphates (17.1%), metallic lead (5.7%), metallic iron (5.5%) and delindeite, Ba-silicate (4%)
The studied lead matte, sample 09TT07599 consists mainly of troilite, FeS (48%), iron sulphates (17.9%), wüstite, FeO (16.1%), fayalite (11.6%) and metallic lead (3.8%).
The studied copper-lead matte, sample 09TT08043 consists mainly of galena, PbS (52%), chalcocite, Cu2S (27.5%) and lead oxide, PbO (15%). Lead silicate and other silicates, magnesium iron chromium oxides, antimony nickel –alloys, accessory minerals, copper lead sulphides, lead nickel oxides and iron zinc oxides.

Any other information on results incl. tables

Chemical composition of reference samples

ORC ref.			OR09	OR07	OR19
Sample			2000171/5	2000171/3	2000171/10
Lab code			09TT07597	09TT07599	00TT08043
Substance			Matte, lead	Matte, lead	Matte, copper-lead
EINECS			282-356-9	282-356-9	305-422-1
Consortium reference No.			27	27	4
Ag	KEM	%	<0.002	<0.002	0.14
B	KEM	%	N/A	N/A	N/A
Bi	TOT	%	<0.012	<0.010	<0.05
Cd	TOT	%	<0.005	<0.004	0.095
Co	TOT	%	0.011	0.009	< 0.002
Mo	TOT	%	0.022	0.027	< 0.002
Sb	TOT	%	0.133	0.026	0.26
Se	TOT	%	0.019	<0.009	0.05
Sn	TOT	%	0.427	0.125	0.012
Te	TOT	%	<0.024	<0.019	0.067
Zn	TOT	%	0.276	0.229	0.15
SiO2	KEM	%	1.42	3.84	0.47
Al2O3	TOT	%	0.158	0.603	0.019
CaO	TOT	%	0.517	1.07	0.068
Cr2O3	TOT	%	0.044	0.057	< 0.003
K2O	TOT	%	0.145	0.113	< 0.05
MgO	TOT	%	0.043	0.118	0.059
MnO	TOT	%	0.394	0.541	0.004
Na2O	TOT	%	0.246	0.314	0.19
(SO4)2	KEM	%	0.069	0.038	0.30
S	LECO	%	18.7	16.4	13.6
C	LECO	%	0.1	0.07	0.07
Satmagan		%	18.7	16.1	0.11

ORC ref.			OR09	OR07	OR19
Sample			2000171/5	2000171/3	2000171/10
Lab code			09TT07597	09TT07599	00TT08043
Substance			Matte, lead	Matte, lead	Matte, copper-lead
EINECS			282-356-9	282-356-9	305-422-1
Consortium reference No.			27	27	4
As	P1	%	<0.008	<0.007	<0.003
	P2	%	0.03	<0.007	0.010
	P3	%	0.02	<0.009	< 0.004
	P4	%	0.055	0.017	0.013
	PSUM	%	0.105	0.017	0.023
	TOT	%	0.097	0.028	0.026
Cu	P1	%	<0.008	<0.007	<0.003
	P2	%	<0.020	<0.019	0.12
	P3	%	0.386	0.183	21.9
	P4	%	0.298	0.132	0.36
	PSUM	%	0.684	0.315	22.38
	TOT	%	0.737	0.325	22.1
Fe	P1	%	<0.008	<0.007	<0.003
	P2	%	11.50	13.9	0.092
	P3	%	0.11	0.332	0.011
	P4	%	41.40	37.2	0.13
	PSUM	%	53.01	51.432	0.23
	TOT	%	59.30	61.2	0.26
Ni	P1	%	<0.008	<0.007	<0.003
	P2	%	0.05	0.031	0.008
	P3	%	<0.010	<0.009	0.005
	P4	%	0.07	0.031	0.060
	PSUM	%	0.12	0.062	0.073
	TOT	%	0.17	0.074	0.073
Pb	P1	%	<0.008	0.135	0.027
	P2	%	0.25	0.204	0.26
	P3	%	0.69	0.589	< 0.04
	P4	%	4.70	2.64	38.7
	PSUM	%	5.64	3.568	38.99
	TOT	%	5.84	3.98	57.8

Applicant's summary and conclusion

Conclusions:

Good quality study that assessed full chemistry and mineralogy of three representative samples of matte lead/matte-copper lead. The mineralogy (and the distribution pattern for each key element, i.e. % from Total into the various mineralogical forms/species present into the UVCB) of the reference samples can be used to derive the classification of matte lead (or matte-copper lead) samples (mixture toxicity rules).

Executive summary:

The studied lead matte, sample 09TT07597 consists mainly of troilite, FeS (42.8%), wüstite, FeO (18.7%), iron sulphates (17.1%), metallic lead (5.7%), metallic iron (5.5%) and delindeite, Ba-silicate (4%) The studied lead matte, sample 09TT07599 consists mainly of troilite, FeS (48%), iron sulphates (17.9%), wüstite, FeO (16.1%), fayalite (11.6%) and metallic lead (3.8%). The studied copper-lead matte, sample 09TT08043 consists mainly of galena, PbS (52%), chalcocite, Cu2S (27.5%) and lead oxide, PbO (15%). Lead silicate and other silicates, magnesium iron chromium oxides, antimony nickel –alloys, accessory minerals, copper lead sulphides, lead nickel oxides and iron zinc oxides.

The mineralogy of the reference samples can be used to derive the classification of these samples but also to predict the mineralogy of other matte lead (or matte-copper lead) samples. Differences in speciation between the reference samples, and anticipated differences in classification, initially suggested the need for two grades of this intermediate based on the form in which lead was maily present (compounds/metal). As a consequence, company specific classifications were calculated using one of the two different speciation patterns.The calculator sheets, which are used to derive the classification and which reflect particular assumptions that are made, can be found in attachment above (attached background material).