Flue dust, copper-refining

Endpoint summary

Additional information

The UVCB substance is an inorganic, complex metal containing material.

 

Intermediate B11 - Flue Dusts, Copper Refining   “Product recovered from exhaust gas streams found in furnaces, flues and setting chambers as a result of roasting, smelting and converting operations from Copper refining processes. Constituents found as end products are dependent upon the materials used during the various operations”
EC names	Substances covered	EC number / EINECS No.	CASNo.
Flue dust, copper refining*	Flue dusts	266-966-2	67711-90-4
Wastes, copper-manuf, calcium hydroxide-treated*		302-676-5	94114-41-7
Slimes and sludges, copper conc. Roasting off gas scrubbing, lead-mercury-selenium-contg. *	Off gas scrubbing	310-062-3	102110-61-2
Slimes and sludges, copper-lead ore roasting, off gas scrubbing, arsenic-contg.*	Off gas scrubbing	310-063-9	102110-62-3

 

At room temperature, the substance is a solid.

 

The majority of the available data on physical and chemical properties of the UVCB is taken from the report Liippo, et al, 2010 –a comprehensive study performed on the UVCB to characterize it (physico-chemical and mineralogical properties) in view of the upcoming REACH registrations of copper intermediates by the REACH Copper Consortium.

 

 In particular, a comprehensive chemical and mineralogical characterization of representative samples was performed (and reported under IUCLID 4.23). The study from Liippo et al (Outotec Lab) furthermore includes thermo gravimetric /differential scanning calorimetric (TG/DSC) measurements (under Air flux and Nitrogen atmosphere) that allowed determining melting, oxidation and related thermal stability properties of the UVCB.

The Outotec study included: Chemical assays (Inductively coupled argon plasma optic emission spectrometer, sulfur and carbon analyzes, Measurement of amount of magnetic material), Granulometry, density and specific surface measurements, determination of melting and oxidation temperatures (Thermogravimetry / differential scanning calorimetry), Water solubility tests, Mineralogical characterization (X-ray Diffraction, Optical Microscopy, Scanning Electron Microscopy) and Mineral Quantification. Based on the tests results, the study furthermore includes expert judgements addressing flammable, self-ignition, explosive and oxidising properties of the materials.

 

The selection and collection of the representative samples was made based on expert knowledge and according to standardized sampling protocols developed by the REACH Copper Consortium, an industry joint-venture regrouping major manufacturing and importing companies of the UVCB substance. Details on the sampling approach and the representative samples are reported as supporting information in IUCLID 1.4 and 4.1.

 

For a number of physico chemical properties, a range of values are provided to cover the variability among representative samples, if appropriate. The relevant physico-chemical properties of the materials (as well as IUCLID sections) are summarised below:

Table 1: Summary of the results

ECI Comments / Remarks	IUCLID Section	flue dust from Secondary smelters (representative)	flue dust from primary smelter (electric furnace) (composite, from one silo)	flue dust from primary smelter (blast furnace) (dried filtered slime, homogenized)
Lab code		09TT03192	09TT03513	09TT03514
State / Colour	4.1	Solid, Grey	Solid, Beige	Solid, Bluish black
Relative Density g/m3	4.4	4.74	5.33	3.22
Specific surface area	4.5	3.01	3.34	n.a.
Granulometry, D50, µm	4.5	<20	<20	<20
Water solubility	4.8	poor (*)	poor (*)	poor (*)
Melting temperature,°C	4.2	139 °C	100 °C	170 °C
Oxidation Temperature,°C	4.15	1004 °C	No oxidation	255 °C
Assays / Chemistry	4.23	See table	See table	See table
Mineralogy	4.23	See table	See table	See table
Flammability	4.13	No	No	No
Self-ignition	4.12	No	No	No
Explosive properties	4.14	No	No	No
Oxidizing properties	4.15	No	No	No
Relative Density, OECD 109; specific surface area, BET method; water solubility,OECD 105; melting and oxidation temperature TG/DSC analysis

(*) Poor in preliminary test, with exception at high loading and shaking over long period.