A new technology for copper slag reduction to get molten iron and copper matte

2015 ◽  
Vol 22 (5) ◽  
pp. 396-401 ◽  
Author(s):  
Jun Zhang ◽  
Yuan-hong Qi ◽  
Ding-liu Yan ◽  
Hai-chuan Xu
Keyword(s):  
New Technology ◽  
Copper Slag ◽  
Molten Iron ◽  
Copper Matte ◽  
Slag Reduction

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.

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.

Development of the Process of Manufacturing Pig Iron for Cast Iron from Copper Slag

2014 ◽  
Vol 711 ◽  
pp. 218-221
Author(s):  
Jei Pil Wang
Keyword(s):  
Cast Iron ◽  
Electric Furnace ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Matte ◽  
Pig Iron ◽  
Iron Copper

A study on the manufacturing pig iron for cast iron from copper slag has been conducted to recover iron-copper matte to be used as a raw material for foundry industries. The copper slag was reduced by carbothermic reaction at 1300°C for 2 hours using electric furnace. Finally, iron-copper matte was successfully obtained with about 93 wt.% and 5 wt.%, respectively.

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

scholarly journals Element Distribution and Migration Behavior in the Copper Slag Reduction and Separation Process

2021 ◽  
Vol 9 ◽  
Author(s):  
Zongliang Zuo ◽  
Yan Feng ◽  
Siyi Luo ◽  
Xinjiang Dong ◽  
Xiaoteng Li ◽  
...  
Keyword(s):  
Melting Process ◽  
Copper Slag ◽  
Slag Layer ◽  
Element Distribution ◽  
Separation Process ◽  
Elemental Distribution ◽  
Migration Behavior ◽  
Operation Parameters ◽  
And Migration ◽  
Slag Reduction

Copper slag is a solid pollutant with high recyclability. Reduction and separation are regarded as effective disposal methods. However, during the melting process, the separation and migration behavior of elements in the copper slag is complicated. Thus, the formation of pollutants cannot be controlled merely by optimizing the operation parameters. The elemental distribution and migration behavior are discussed in this work. In reduction experiments, the copper slag smelting liquid was divided into three layers: a reduction slag layer, a reactive boundary layer, and an iron ingot layer. Reduction slag and ingot iron were on the top and bottom of the liquid, respectively. Residual carbon oozed at the interface. C can react with reducible “O” atoms, which exist in 2FeO·SiO2, Fe3O4, and CuO. Meanwhile, CO was generated and overflowed from the liquid layer. After reduction by C or CO, metallic iron and copper were produced and migrated to the iron ingot layer. In the liquid, S gradually diffused into the upper layer. Some of the ZnO and CuS spilled from the liquid into the flume. After reduction, CaO·SiO2 was generated and moved to the upper layer.

scholarly journals Alternative Reduction of Copper Matte in Reduction Process of Copper Slag

2017 ◽  
Vol 57 (5) ◽  
pp. 775-781 ◽  
Author(s):  
Bao-jing Zhang ◽  
Li-ping Niu ◽  
Ting-an Zhang ◽  
Zhi-qiang Li ◽  
Dong-liang Zhang ◽  
...  
Keyword(s):  
Reduction Process ◽  
Copper Slag ◽  
Copper Matte

scholarly journals Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 973
Author(s):  
Hanquan Zhang ◽  
Chaojie Hu ◽  
Wangjie Gao ◽  
Manman Lu
Keyword(s):  
Activation Energy ◽  
Direct Reduction ◽  
Iron Concentration ◽  
Kinetic Studies ◽  
Copper Slag ◽  
Reduction Temperature ◽  
Carbon Gasification ◽  
Reduction Characteristics ◽  
Slag Reduction ◽  
Reaction Activation Energy

The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved 91.55%, and the Fe recovery was 98.13%. The kinetic studies on reduction indicated that the reduction of copper slag was controlled by the interfacial reaction and carbon gasification at 1050 °C. When at a higher reduction temperature, the copper slag reduction was controlled by the diffusion of the gas. The integral kinetics model research illustrated that the reaction activation energy increased as the reduction of copper slag proceeded. The early reduction of Fe3O4 needed a low reaction activation energy. The subsequent reduction of Fe2SiO4 needed higher reaction activation energy compared with that of Fe3O4 reduction.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

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