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General Information of copper slag
- Copper slag is an abrasive blasting grit made of granulated slag from metal smelting processes (also called iron silicate).
- Copper slag is a by-product created during the copper smelting and refining process.
- Copper slag blasting edia/grit is manufactured of the granulated slag of copper refineries, and used for blast-cleaning of metal surface.
- Copper slag is a by-product obtained during the production of copper metal, which can be used as pozzolana in the production of cementing materials.
- One of the primary advantages to copper slag is the low risk it poses to health and the environment.
- Copper slag also has a high strength-to-weight ratio, making it an effective option in concrete, or as a fill material under the roadway.
Uses
- Copper slag has also gained popularity in the building industry for use as a fill material.
- Contractors may also use copper slag in place of sand during concrete construction.
- Copper slag can also be used as a building material, formed into blocks.
- Copper slag is widely used in the sand blasting industry and it has been used in the manufacture of abrasive tools.
- In general, the spent copper slag is suitable to be used as a fill material for land reclamation.
- Copper slag is widely used as an abrasive media to remove rust, old coating and other impurities in dry abrasive blasting due to its high hardness (6-7 Mohs), high density (2.8-3.8 g/cm3) and low free silica content.
- Copper slag is
an abrasive
blasting grit made of
granulated slag from metal smelting processes (also
called iron silicate).
- Copper slag abrasive is suitable for blast
cleaning of steel and stone/concrete surfaces, removal of mill scale,
rust, old paint, dirt etc.
Reports
- The copper slag, the by product of the melting plant of Lac, north Albania can be used successfully as Portland cement substitute in the cement industry.
- Copper slag is one of the materials that is considered as a waste material which could have a promising future in construction industry as partial substitute of either cement or aggregates.
- In Singapore, raw copper slag has been reused to remove rust and marine deposits that had accumulated on ships.
- Indian firms finds a huge potential for the use of copper slag in concrete applications.
- At present, across the world around 33 tonnes of slag is generated while in India three copper producers Birla Copper and Hindustan Copper produce around 6-6.5 tonnes of slag at different sites.
Technical & Chemical Analysis
Table 1: Physical Properties of copper slag
Physical Properties
|
Copper slag
|
Particle shape
|
Irregular
|
Appearance
|
Black & glassy
|
Type
|
Air cooled
|
Specific gravity
|
3.91
|
Percentage
of
voids
|
43.20%
|
Bulk density
|
2.08 g/cc
|
Fineness modulus of copper slag
|
3.47
|
Angle of internal friction
|
51° 20’
|
Table 2: SIEVE ANALYSIS OF COPPER SLAG
SIEVE SIZE
(mm) RANGE
(%)
4.00 to
+3.00 2
to 4
3
to + 2.36 3
to 12
2.36
to +1 40
to 55
1
to +0.5 15
to 30
0.5 to + 0.212 6 to 12
0.212
below 0.2
to 1.0
TABLE:3 CHEMICAL PROPERTIES OF COPPER SLAG
S.No
|
Chemical
Component
|
%
Of Chemical
Component
|
1.
|
SiO2
|
25.84
|
2.
|
Fe2O3
|
68.29
|
3.
|
Al2O3
|
0.22
|
4.
|
CaO
|
0.15
|
5.
|
Na2O
|
0.58
|
7.
|
K2O
|
0.23
|
8.
|
LoI
|
6.59
|
9.
|
Mn2O3
|
0.22
|
10.
|
TiO2
|
0.41
|
11.
|
SO3
|
0.11
|
12.
|
CuO
|
1.20
|
13.
|
Sulphide sulphur
|
0.25
|
14.
|
Insoluble residue
|
14.88
|
15.
|
Chloride
|
0.018
|
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