scholarly journals Microstructure characterisation of freeze linings formed in a copper slag cleaning slag

2015 ◽  
Vol 51 (1) ◽  
pp. 41-48 ◽  
Author(s):  
J. Jansson ◽  
P. Taskinen ◽  
M. Kaskiala
Keyword(s):  
Copper Slag ◽  
Copper Smelter ◽  
Primary Phase ◽  
Initial Growth ◽  
Silicate Slag ◽  
Freeze Lining ◽  
Slag Cleaning ◽  
High Silica ◽  
Slag Reduction ◽  
Furnace Slag

The initial growth rate of freeze linings on water-cooled elements submerged in molten iron silicate slag is fast. The freeze lining microstructure forming on water cooled steel surface in a high-silica, slag cleaning furnace slag of a direct-to-blister copper smelter is mostly glassy or amorphous. It contains 5-30 ?m magnetite crystals, very small and larger copper droplets as well as small magnetite and silicate nuclei embedded in the glassy silica-rich matrix. Chemically the formed freeze linings are more silica-rich than the slag from which they were generated. Magnetite (spinel) is the primary phase of the solidifying SCF slag but it does not form a continuous network through the freeze lining. Its strength is given by the intergranular silica-rich phase which initially is glassy or microcrystalline. Due to only partial slag reduction in the SCF process, large magnetite crystals are present in the freeze lining and seem to interact physically with copper droplets.

scholarly journals Recovering Value from End-of-Life Batteries by Integrating Froth Flotation and Pyrometallurgical Copper-Slag Cleaning

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 15
Author(s):  
Tommi Rinne ◽  
Anna Klemettinen ◽  
Lassi Klemettinen ◽  
Ronja Ruismäki ◽  
Hugh O’Brien ◽  
...  
Keyword(s):  
Froth Flotation ◽  
Lithium Ion ◽  
Copper Slag ◽  
Metallothermic Reduction ◽  
Flotation Process ◽  
Slag Cleaning ◽  
Active Elements ◽  
Hazardous Metals ◽  
Slag Reduction ◽  
Suitable Process

In this study, industrial lithium-ion battery (LIB) waste was treated by a froth flotation process, which allowed selective separation of electrode particles from metallic-rich fractions containing Cu and Al. In the flotation experiments, recovery rates of ~80 and 98.8% for the cathode active elements (Co, Ni, Mn) and graphite were achieved, respectively. The recovered metals from the flotation fraction were subsequently used in high-temperature Cu-slag reduction. In this manner, the possibility of using metallothermic reduction for Cu-slag reduction using Al-wires from LIB waste as the main reductant was studied. The behavior of valuable (Cu, Ni, Co, Li) and hazardous metals (Zn, As, Sb, Pb), as a function of time as well as the influence of Cu-slag-to-spent battery (SB) ratio, were investigated. The results showcase a suitable process to recover copper from spent batteries and industrial Cu-slag. Cu-concentration decreased to approximately 0.3 wt.% after 60 min reduction time in all samples where Cu/Al-rich LIB waste fraction was added. It was also showed that aluminothermic reduction is effective for removing hazardous metals from the slag. The proposed process is also capable of recovering Cu, Co, and Ni from both Cu-slag and LIB waste, resulting in a secondary Cu slag that can be used in various applications.

Development of Electric Furnace Slag Cleaning at a Secondary Copper Smelter

JOM ◽  
1982 ◽  
Vol 34 (3) ◽  
pp. 54-56 ◽  
Author(s):  
H. P. Rajcevic ◽  
W. R. Opie
Keyword(s):  
Electric Furnace ◽  
Copper Smelter ◽  
Slag Cleaning ◽  
Furnace Slag

scholarly journals Slag Cleaning Equilibria in Iron Silicate Slag–Copper Systems

2019 ◽  
Vol 5 (4) ◽  
pp. 463-473 ◽  
Author(s):  
Niko Hellstén ◽  
Lassi Klemettinen ◽  
Dmitry Sukhomlinov ◽  
Hugh O’Brien ◽  
Pekka Taskinen ◽  
...  
Keyword(s):  
Iron Silicate ◽  
Silicate Slag ◽  
Iron Silicate Slag ◽  
Slag Cleaning ◽  
Slag Copper

Phase Equilibria of “Cu2O”-“FeO”-CaO-MgO-Al2O3 Slags at PO2 of 10-8.5 atm in Equilibrium with Metallic Copper for a Copper Slag Cleaning Production

2010 ◽  
Vol 41 (6) ◽  
pp. 1186-1193 ◽  
Author(s):  
Hector M. Henao ◽  
Claudio Pizarro ◽  
Jonkion Font ◽  
Alex Moyano ◽  
Peter C. Hayes ◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Metallic Copper ◽  
Copper Slag ◽  
Slag Cleaning

scholarly journals Characteristics of Blended Geopolymer Concrete Using Ultrafine Ground Granulated Blast Furnace Slag and Copper Slag

2020 ◽  
Vol 44 (6) ◽  
pp. 433-439
Author(s):  
Vijayasarathy Rathanasalam ◽  
Jayabalan Perumalsami ◽  
Karthikeyan Jayakumar
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Fine Aggregate ◽  
Geopolymer Concrete ◽  
Strength Performance ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

This paper presents the properties of blended geopolymer concrete manufactured using fly ash and ultrafine Ground Granulated Blast Furnace Slag (UFGGBFS), along with the copper slag (CPS) as replacement of fine aggregate (crushed stone sand). Various parameters considered in this study include different sodium hydroxide concentrations (10M, 12M and 14M); 0.35 as alkaline liquid to binder ratio; 2.5 as sodium silicate to sodium hydroxide ratio and cured in ambient curing condition. Further, geopolymer concrete was manufactured using fly ash as the prime source material which is replaced with UFGGBFS (0%, 5%, 10% and 15%). Copper slag has been used as replacement of fine aggregate in this study. Properties of the fresh manufactured geopolymer concrete were studied by slump test. Compressive strength of the manufactured geopolymer concrete was tested and recorded after curing for 3, 7 and 28 days. Microstructure Characterization of Geopolymer concrete specimens was done by Scanning Electron Microscope (SEM) analysis. Experimental results revealed that the addition of UFGGBFS resulted in an increased strength performance of geopolymer concrete. Also, this study demonstrated that the strength of geopolymer concrete increased with an increase in sodium hydroxide concentration. SEM results revealed that the addition of UFGGBFS resulted in a dense structure.

The use of waste, fine-grained carbonaceous material in the process of copper slag reduction

2021 ◽  
Vol 288 ◽  
pp. 125640
Author(s):  
Jerzy Łabaj ◽  
Leszek Blacha ◽  
Maciej Jodkowski ◽  
Albert Smalcerz ◽  
Mária Fröhlichová ◽  
...  
Keyword(s):  
Carbonaceous Material ◽  
Copper Slag ◽  
Fine Grained ◽  
Slag Reduction
Sign in / Sign up

Export Citation Format

Share Document