residue, nickel matte leaching

Endpoint summary

Additional information

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

 

Intermediate B14 – ADDED^th2008- Residues, leaching   “Product obtained by leaching Nickel matte with chlorine or sulphuric acid. It is composed primarily of copper sulphide and sulphates.”
EC name (or recognized name)	Substance covered	EC number / EINECS No.	CASNo.
Residues, Nickel matte leaching**	Copper containing residue from leaching	Not available	Not available

 

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 Liipo, et al, 2010 and Liipo et al. 2014 –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 a representative sample 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, sulphur 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.

 

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	Copper, nickel matte leaching residue	Copper residue
Lab code		09TT02537	14TT00402
State / Colour	4.1	Solid, brown	Solid, Greenish black
Relative Density g/m3	4.4	3.9	4.64
Specific surface area	4.5	5.59	6.476
Granulometry, D50, µm	4.5	< 20	Powder
Water solubility	4.8	poor to low (*)
Melting temperature,°C	4.2	~80 (decomposition)
Oxidation Temperature,°C	4.15	~300
Assays / Chemistry	4.23	See table
Mineralogy	4.23	See table
Flammability	4.13	Negative
Self-ignition	4.12	Negative
Explosive properties	4.14	Negative
Oxidizing properties	4.15	Negative
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.