Speiss, 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

Cross-reference

Reason / purpose for cross-reference:

reference to same study

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

Reference substance name:

Speiss, lead

EC Number:

282-366-3

EC Name:

Speiss, lead

Cas Number:

84195-61-9

Molecular formula:

Molecular weight/formula concept not applicable to Inorganic UVCB (complex metal containing substance)

IUPAC Name:

Speiss, lead

Results and discussion

Results:

The studied speiss sample 09TT08036 (Speiss lead Grade 1) contains 53% copper, 15% lead, 17% antimony, 6.2% arsenic, 2.5% tin, 1% sulphur and traces of other elements.

The studied speiss sample 09TT08042 (Speiss lead Grade 2) contains 36% copper, 22% lead, 11% sulphur, 6.2% arsenic, 4.8% iron, 4.7% nickel, 4.3% tin, 3.5 % antimony and traces of other elements.

The studied speiss sample 09TT08036 consists mainly of antimony copper, Cu11Sb3 (44.9%), koutekite, Cu5As2 (22.6%) and metallic lead (14.6%). Other notable mineral phases are metallic copper (4.8%), sorosite, Cu3Sn (4.2%) and chalcocite, Cu2S (3.4%). Chvilevalite, rosiaite, modderite, massicot and hematite occur as accessory minerals. Main copper and antimony carrier is antimony copper (53%) and koutekite carries almost half of the arsenic
content. Lead is mainly (94%) metallic.
The studied speiss sample 09TT08042, consists mainly of iron-rich (avg.7%Fe) chalcocite, Cu2S (39.6%), galena, PbS (15.4%), sorosite, Cu(SnSb) (13%), metallic lead (10.2%), NiAsSnSb –alloys (9.9%). Other notable mineral phases are stibnite, Sb2S3 (4.5%) and nickel and copper arsenides (3.7%). Silicates, magnetite, lead oxides, metallic silver and copper are as accessory minerals. Lead is distributed almost in half between galena and
metallic lead. Copper is mainly carried by chalcocite (77%). Stibnite is the main (52%) antimony carrier. Arsenic and tin is mainly carried by NiAsSnSb –alloys.

Any other information on results incl. tables

Table1: Chemical composition of studied samples

Lab code			09TT08036
Sample			SpeissLead
Sample code			OR01
As	P1	%	<0.003		Ag	KEM	%	0,13
	P2	%	0,047		B	KEM	%	Na
	P3	%	0,1		Bi	TOT	%	<0,05
	P4	%	2,06		Cd	TOT	%	0,021
	Sum		2,207		Co	TOT	%	0,11
	TOT	%	6,24		Mo	TOT	%	<0,002
Cu	P1	%	<0,003		Sb	TOT	%	17,3
	P2	%	0,87		Se	TOT	%	0,095
	P3	%	17,1		Sn	TOT	%	2,48
	P4	%	33,3		Te	TOT	%	0,03
	Sum		51,27		Zn	TOT	%	0,19
	TOT	%	53,3
Fe	P1	%	<0,003		SiO2	KEM	%	0,52
	P2	%	0,12		Al2O3	TOT	%	0,010
	P3	%	0,04		CaO	TOT	%	0,010
	P4	%	0,15		Cr2O3	TOT	%	<0,003
	Sum		0,31		K2O	TOT	%	<0,05
	TOT	%	0,45		MgO	TOT	%	0,004
Ni	P1	%	<0,003		MnO	TOT	%	<0,003
	P2	%	0,009		Na2O	TOT	%	0,18
	P3	%	0,007		SO42-	KEM	%	0,027
	P4	%	0,71
	Sum		0,726		S	Leco	%	1,03
	TOT	%	0,75		C	Leco	%	0,14
Pb	P1	%	0,003		Satmagan		%	0,0
	P2	%	0,20
	P3	%	<0,04
	P4	%	12,5
	Sum		12,703
	TOT	%	15,2

 

 

 

Lab code			09TT08042
Sample			LeadSpeiss
Sample code			OR20
As	P1	%	<0,003		Ag	KEM	%	0,14
	P2	%	0,10		B	KEM	%	Na
	P3	%	0,13		Bi	TOT	%	<0,05
	P4	%	2,43		Cd	TOT	%	0,01
	Sum		2,66		Co	TOT	%	0,56
	TOT	%	6,21		Mo	TOT	%	<0,002
Cu	P1	%	<0,003		Sb	TOT	%	3,54
	P2	%	0,40		Se	TOT	%	0,75
	P3	%	27,9		Sn	TOT	%	4,31
	P4	%	5,94		Te	TOT	%	0,023
	Sum		34,24		Zn	TOT	%	0,71
	TOT	%	36,2
Fe	P1	%	<0,003		SiO2	KEM	%	0,78
	P2	%	0,81		Al2O3	TOT	%	0,029
	P3	%	1,63		CaO	TOT	%	0,12
	P4	%	1,47		Cr2O3	TOT	%	0,004
	Sum		3,91		K2O	TOT	%	<0,05
	TOT	%	4,76		MgO	TOT	%	0,015
Ni	P1	%	<0,003		MnO	TOT	%	0,007
	P2	%	0,12		Na2O	TOT	%	0,035
	P3	%	0,049		SO42-	KEM	%	0,037
	P4	%	3,50
	Sum		3,669		S	Leco	%	11,0
	TOT	%	4,67		C	Leco	%	0,07
Pb	P1	%	0,34		Satmagan		%	1,09
	P2	%	0,19
	P3	%	<0,04
	P4	%	22,7
	Sum		23,23
	TOT	%	22,3

 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 = Fe3O4 analyzer

Applicant's summary and conclusion

Conclusions:

Good quality study that assessed full chemistry and mineralogy of two representative samples of speiss 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 speiss lead samples (mixture toxicity rules).

Executive summary:

The studied speiss sample 09TT08036 consists mainly of antimony copper, Cu11Sb3 (44.9%), koutekite, Cu5As2 (22.6%) and metallic lead (14.6%). Other notable mineral phases are metallic copper (4.8%), sorosite, Cu3Sn (4.2%) and chalcocite, Cu2S (3.4%). Chvilevalite, rosiaite, modderite, massicot and hematite occur as accessory minerals. Main copper and antimony carrier is antimony copper (53%) and koutekite carries almost half of the arsenic content. Lead is mainly (94%) metallic. The studied speiss sample 09TT08042 consists mainly of iron-rich (avg.7%Fe) chalcocite, Cu2S (39.6%), galena, PbS (15.4%), sorosite, Cu(SnSb) (13%), metallic lead (10.2%), NiAsSnSb –alloys (9.9%). Other notable mineral phases are stibnite, Sb2S3 (4.5%) and nickel and copper arsenides (3.7%). Silicates, magnetite, lead oxides, metallic silver and copper are as accessory minerals. Lead is distributed almost in half between galena and metallic lead. Copper is mainly carried by chalcocite (77%). Stibnite is the main (52%) antimony carrier. Arsenic and tin is mainly carried by NiAsSnSb –alloys.

The mineralogy of the reference samples can be used to derive the classification of both samples but also to predict the mineralogy of other speiss 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 sulphur content. As a consequence, company specific classifications were calculated using one of the two different speciation patterns. However, since it turned out that both speciation patterns resulted in very similar classifications for all company specific samples, it was decided to revert to a single grade for this intermediate.

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).