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 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 Fluoride Leaching of Titanium from Ti-Bearing Electric Furnace Slag in [NH4+]-[F−] Solution

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1176
Author(s):  
Fuqiang Zheng ◽  
Yufeng Guo ◽  
Feng Chen ◽  
Shuai Wang ◽  
Jinlai Zhang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electric Furnace ◽  
Kinetic Equations ◽  
Surface Chemical ◽  
Leaching Rate ◽  
Surface Chemical Reaction ◽  
Mechanism And Kinetics ◽  
Semi Empirical ◽  
Kinetics Of ◽  
Furnace Slag

The effects of F− concentration, leaching temperature, and time on the Ti leaching from Ti-bearing electric furnace slag (TEFS) by [NH4+]-[F−] solution leaching process was investigated to reveal the leaching mechanism and kinetics of titanium. The results indicated that the Ti leaching rate obviously increased with the increase of leaching temperature and F− concentration. The kinetic equation of Ti leaching was obtained, and the activation energy was 52.30 kJ/mol. The fitting results of kinetic equations and calculated values of activation energy both indicated that the leaching rate of TEFS was controlled by surface chemical reaction. The semi-empirical kinetics equation was consistent with the real experimental results, with a correlation coefficient (R2) of 0.996. The Ti leaching rate reached 92.83% after leaching at 90 °C for 20 min with F− concentration of 14 mol/L and [NH4+]/[F−] ratio of 0.4. The leaching rates of Si, Fe, V, Mn, and Cr were 94.03%, 7.24%, 5.36%, 4.54%, and 1.73%, respectively. The Ca, Mg, and Al elements were converted to (NH4)3AlF6 and CaMg2Al2F12 in the residue, which can transform into stable oxides and fluorides after pyro-hydrolyzing and calcinating.

scholarly journals Mechanical Characterizations of Oxidizing Steel Slag Soil and Application

2017 ◽  
Author(s):  
Tao Cheng ◽  
Renjie Hu ◽  
Wanhui Xu ◽  
Yi Zhang
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Electric Furnace ◽  
Practical Problem ◽  
Steel Slag ◽  
Problem Analysis ◽  
Compression Tests ◽  
Optimal Moisture Content ◽  
Eaf Slag ◽  
Furnace Slag

In this paper, the mechanical properties and engineering applicationof electric furnace (EAF) slag mixed soil are investigated.The samples of steel slag are taken from a steel manufacturingcompany in Huangshi, a city of China. The mixed soilwas firstly prepared by mixing the steel slag and clay mixturein different proportions. The optimal moisture content for mixingthe soil is investigated from the experiment through directshear test. Based on three axial compression tests, the optimumsteel slag ratio is determined. Finally, the mechanical propertiesof steel slag mixed soil are tested in a practical engineeringproblem through a numerical simulation. The steel slag mixedsoil is used to replace the original soil of the embankment andcompared with that of the original one. The comparison studyshows that the method proposed in this paper is simple andeffective. Moreover, from the practical problem analysis, theoptimal utilization of electric furnace slag can be achieved.

scholarly journals Selective Enrichment and Separation of Ti–Fe Enriched Mineral from Ti-bearing Electric Furnace Slag with Metallic Iron as Carrier

2017 ◽  
Vol 57 (10) ◽  
pp. 1767-1773 ◽  
Author(s):  
Fuqiang Zheng ◽  
Guanzhou Qiu ◽  
Yufeng Guo ◽  
Feng Chen ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Electric Furnace ◽  
Metallic Iron ◽  
Selective Enrichment ◽  
Furnace Slag

Composition Characteristics of Reconstructed Steel Slag with Electric Furnace Slag

2014 ◽  
Vol 541-542 ◽  
pp. 324-328 ◽  
Author(s):  
Qing Liang Huang ◽  
Chen Chen Gong ◽  
De Li Lou ◽  
Jie Zhang ◽  
Ling Chao Lu
Keyword(s):  
Calcination Temperature ◽  
Electric Furnace ◽  
Hydrofluoric Acid ◽  
Particle Shape ◽  
Steel Slag ◽  
Petrographic Analysis ◽  
Granule Morphology ◽  
Mineral Compositions ◽  
Hexagonal Sheets ◽  
Furnace Slag

Mineral compositions and granule morphology of reconstructed steel slag with electric furnace slag as an adjusting component were discussed. The vitreous content with hydrofluoric acid erosion and petrographic analysis were carried out. The results showed that the vitreous content of steel slag was lower than that of raw and first decreases and then increases as the calcination temperature increases; C3S becomes hexagonal sheets or square columnar with the size of 40 to 60 microns and C2S becomes spherical with size of 20 to 50 microns. Particle shape is more regular and the size is smaller than that of raw.

Melting Behavior of Titanium-Bearing Electric Furnace Slag for Effective Smelting of Vanadium Titanomagnetite

JOM ◽  
2018 ◽  
Vol 71 (5) ◽  
pp. 1858-1865 ◽  
Author(s):  
Shuai Wang ◽  
Yufeng Guo ◽  
Tao Jiang ◽  
Feng Chen ◽  
Fuqiang Zheng ◽  
...  
Keyword(s):  
Electric Furnace ◽  
Melting Behavior ◽  
Furnace Slag
Sign in / Sign up

Export Citation Format

Share Document